Archive for the ‘Dental Materials’ Category

New innovations in nanomedicine may be coming your way soon!

Tuesday, August 4th, 2015

By Dr. Kim Wright

It’s amazing the innovations happening in labs around the world right now.  Very soon we may have treatments for many more cancers that use nanoscale vehicles to deliver chemotherapy directly to tumors sparing healthy cells.  These drug vehicles are 200 times smaller than a red blood cell.  According to Scientific American’s April 2015 issue, labs at the University of Tokyo are researching several versions of nanodrug vehicles and are completing the final stages of clinical trials.  It is expected that research development speed will escalate in the next 5 years showing rapid growth in this exciting field.

The particles used to make up these drugs are cloaked in a variety of ways.  One way is they are made to “blend” in with the normal body tissues and therefore do not alert the immune system as a foreign body thus triggering their degradation.  They can also be constructed in a way to resist degradation by the bodies’ enzymes creating a longer life, thus allowing more of the chemotherapeutic agent to attack the cancer.  Some nanodrugs are created to be soft and flexibile allowing them to enter cancer tumors more readily and then degrade in the more acidic environment of the tumor where the chemotherapy drugs are released and are needed exclusively.  Other scientists are attaching cancer protein antibodies to these nanovehicles so that they are attracted to the cancer cells making delivery of their drugs very target specific.

This growing field of medicine could soon be the dominant way in which we fight cancer.  If you or someone you know is fighting cancer do your research and find out all the ways your cancer is being treated, your cancer may be the one where this therapy is being used!



Dental x-rays: What’s in Your Dose

Monday, June 2nd, 2014

By Dr. Dale Miles, BA, DDS, MS, FRCD (C), Diplomate American Board of Oral Maxillofacial Radiology

Doctor with xray

It doesn’t matter whether it’s a periapical, bitewing a panoramic or even a cone beam CT x-ray examination, our patients always seem to be questioning us as to the need for the x-ray. There isn’t a week, possibly even a day, that goes by the dental practice where a dental assistant, dental hygienist her dentist doesn’t hear the following question from the patient, “Why do I need these x-rays?”. And, unfortunately our answers are usually “all over the map”.

“Don’t worry Mr. Jones it’s just like spending one hour in the sunshine.” Don’t worry about Johnny Mrs. Smith it’s like flying across the country in an airplane.” Obviously somewhere at sometime the dentist or auxiliary has been told, heard in the lecture 10 years ago or read in the magazine a comparison made for dental x-rays to everyday activities. Patients are now becoming more sophisticated and actually are demanding real answers and real information to their questions. It is not appropriate to offer them a platitude without any data. It just isn’t that professional. And it doesn’t instill confidence.

The data is out there, and it’s somewhat easy to find. But searching for it really isn’t high on the list of tasks for most of us. In addition, talking about “milliesieverts” is just as foreign to many dentists and auxiliaries as it is to their patients. There is real data about the approximate dose for each x-ray modality, from periapical to cone beam imaging. You can find studies that look at receptor types with round versus rectangular collimation, studies that compare the dose from a panoramic to a certain number of periapicals and x-ray dose even between the various cone beam machines. However, with the myriad of factors that affect x-ray dose, from something as simple as our KV or MAs settings, or the fact that not all cone machines have the same size FOV (field of view), the dose data can be confusing.

So how do we answer our patients question. To date, the best data, or at least the best way that I found for you to use to talk to your patients about x-ray dose actually compares the risk equivalents of dying from everyday activities to the dental x-ray procedure we call on FMS (full mouth series).  Of course even this data comes from comparisons to a full mouth series of film-based radiographs. However, there are still 55% of us out there dental practice using film, despite the fact that faster receptors are available which also will reduce patient x-ray dose.

So, if this initial blog on x-ray dose doesn’t stimulate conversation, nothing will in the dental profession. You need to seek out good data, use something called selection criteria when determining the need for an x-ray exam and transition to the fastest receptors possible and rectangular collimation, which is now been made simple, in order to protect your patient in the best manner possible. Are you up to the task?

Time now to start peppering me with the questions which I’m sure will arise from this initial blog posting. I look forward to your comments and questions. BTW, this is the first time that I’ve accepted an invitation to “blog”. My time, like yours, has become my most precious commodity. But I’m willing to help you find the answers you seek.



Dr. Miles is a diplomate of the American Board of Oral and Maxillofacial Radiology and the American Board of Oral Medicine. He has authored over 130 peer-reviewed articles and 6 textbooks, including the best selling atlas on Cone Beam CT, Color Atlas of Cone Beam CT for Dental Applications published by Quintessence Publishing. Dr. Miles is in full-time practice of Oral and Maxillofacial Radiology in Fountain Hills, Arizona. He is the President and CEO of Cone Beam Radiographic Services, LLC., a CBCT reporting service for dentists and dental specialists and President of EasyRiter, LLC, which produces a simple CBCT report generating software for the profession.



Dental Implant Concerns Related To Patient’s Health

Monday, July 8th, 2013

Capped Dental Implant Model

By Dr. Don Callan

The goal of dental implants is to provide function, longevity and esthetics for dental patients in an environment that can be maintained with routine oral hygiene procedures. Dental implants are no longer experimental, exotic or rare. Implants are the treatment of choice for an increasing number of people who want the best that dentistry has to offer. Dental implants have proven to be a valuable treatment of choice for replacing missing teeth and have been developed from the anatomy of natural teeth. Dental implants are also subjected to periodontal disease (periodontitis) caused by oral bacteria (periodontal pathogens). Both patients and dentists should be aware of possible complications that can affect the patient’s oral and systemic health when implants are placed, even if excellent esthetic results are achieved. Professional implant maintenance and diligent patient home care are important factors. However, because a portion of the implant is below the gum level (subgingival), patients and clinicians have limited control over hygienic measures to prevent infection. Therefore, implant design is an important factor.

Periodontal pathogens have been linked with increased risk of systemic illness and complications in existing diseases.  Recently, several articles detailing these findings have been published, emphasizing the importance of the association between periodontal disease and systemic health problems.  In fact, recent reports of oral infections have been shown to be associated statistically with mortality. With periodontal disease, millions of oral bacteria are in direct physical contact with gum tissue, which provides an easy portal to the circulatory system.  After entering the bloodstream, periodontal pathogens have been shown to increase the risk of cardiovascular disease, strokes, lung disease, rheumatoid arthritis and may hinder glycemic control in diabetes. Sufficient evidence exists to conclude that both periodontitis and Peri-Implantitis involve the same bacteria. This same inflammatory process can damage healthy tissue and lead to bone loss around the implant.

In addition to optimizing esthetic and functional results, infection (Peri-Implantitis) of gum and bone tissue surrounding the implant is of major concern. These infections have driven many developments in dental implant design and use. Treatment of dental patients is rapidly moving from an approach focused primarily on esthetic and functional concerns toward an approach, which focuses on optimal health as a critical goal. Numerous published studies promote the prevention of oral bacteria harboring around implants as a key outcome in addition to traditional measures of implantation success.

Studies have shown periodontal pathogens surrounding dental implants will contribute to implant infections and is the main cause of implant loss and systemic concerns. Some patients may have significant infection and bone loss with no symptoms and may not pursue adequate follow-up care that would identify those conditions. Researchers have identified specific periodontal pathogens around and within the micro-gap of implant systems as the same seen in periodontal disease. Some implant companies are developing new designs for the elimination of the microgap issue. Therefore, it is important for all implant patients to see the dental professional for routine care and evaluation of the health around the implant.  It is possible for patients who maintain optimum hygiene care to suffer from implant infections if bacteria are harbored within, around, and between implant components.

In summary, the patient, dentist and the implant manufacturer have their respective areas of responsibility to maintain implant success. Infection about dental implants is the number one cause of failure; therefore, the patient must maintain excellent home care procedures of the implant and visit the dental office for routine cleanings. The dentist is responsible for proper surgical procedures and instruction to the patient for home care procedures. The implant manufacturer must be aware of the causes of implant failures in order to change or correct the design of dental implants as needed to promote long-term success. A poor implant design will affect esthetics, function and the ability to allow proper home care as well as professional cleanings of the implant and its restoration. IMPLANT SUCCESS IS A TEAM EFFORT: THE PATIENT, DENTIST AND MOST OF ALL THE MANUFACTURER OF THE IMPLANT.


DPCDr. Callan received his B.S., B.A. degree from the University of Arkansas in Business Management and Marketing. He received his D.D.S. degree and a Certificate in Periodontics from the University of Missouri at Kansas City. Dr. Callan maintains a private practice and hospital appointments limited to Periodontics with an emphasis on tissue regeneration and implant dentistry in Little Rock, Arkansas. Dr. Callan has authored 61 publications about dental implants and tissue regeneration. Dr. Callan has presented lectures in the United States and internationally, including the University of Moscow, Russia, China, Japan, UK, Mexico, Canada, Central America, and South America, on various topics including dental implants, Peri-Implantitis, bone regeneration, soft tissue regeneration, implant maintenance, oral and systemic periodontal health, marketing to the dental patient and treatment planning of the edentulous patient.




Look Before You Leap… The Treatment of Snoring and Obstructive Sleep Apnea

Monday, June 3rd, 2013

 By Gail Demko, DMD

Sleep Apnea and CPAP

All medical and dental professionals are looking for ways to offset decreases in reimbursement, often by acquiring new skills that allow expansion into previously untapped patient populations. Many dentists have become interested in providing oral device therapy for patients who snore and or have obstructive sleep apnea. All dentists possess the skills required to fabricate oral devices, we learned them in dental school. We are adept at using many different impression materials, adjusting and modifying multiple types of mouthpieces, can analyze occlusal contacts on complete dentures and have a passing knowledge of clonic bruxism and tonic bruxism (clenching).

The treatment of patients with snoring and obstructive sleep apnea requires not only these basic mechanical skills but an understanding of the overall disease process. This is a medical disease with medical complications and comorbidities. Just as untreated caries will lead to endodontic involvement and possible tooth loss, untreated sleep apnea can lead to hypertension, heart attack, stroke or an increased incidence of various cancers. Dentists are fully in control of treating all outcomes of the carious process but we are not trained to deal with the severe medical outcomes of untreated sleep apnea.

You must understand that we are part of the medical team. We work with physicians to appropriately treat patients with snoring and sleep apnea. Diagnosis of disease, be it snoring or sleep apnea, lies within the arena of medicine, not dentistry (just ask your malpractice insurer). To treat a patient who complains of snoring without appropriate medical consult and medical diagnosis may result in the resolution of snoring without control of the underlying sleep apnea. This patient could go on to suffer heart failure, have a motor vehicle accident or develop hypertension. Resolution of the patient’s symptom of snoring may allow both you and the patient to assume that the underlying sleep disordered breathing has also been controlled; snoring often resolves before there is control of the obstructive sleep apnea. This presumption can be very dangerous to the patient and could have serious consequences for your practice.

Many companies now market legal medical diagnostic sleep testing equipment directly to dentists. The sales rep tells you that this will allow you to “screen” patients in your practice for snoring and sleep apnea. These are not screening devices; these are legal medical diagnostic tools. The standard of care requires evaluation of the patient by medical provider not just remote evaluation of the data obtained through home sleep testing by a physician licensed in your state.

So approach this field in a responsible way. Learn about the diseases of sleep disordered breathing. Understand all available treatment options and know when oral appliance therapy may not be appropriate for the individual patient in your practice.

Treating medical diseases requires that you be part of the team. Physician, surgeon, general dentist, orthodontist, nurse practitioner and respiratory technician: all of these have a part to play. As dentistry evolves and continues to move back in synchrony with medicine it is time to forge new alliances with our medical colleagues to provide improved outcomes for all of our patients.



Dr. Gail Demko started her career in dental treatment of OSA at Beth Israel Deaconess Medical Center in 1989. In 1997, she was the first dentist in the US to limit her practice to the treatment of OSA. She became the expert advisor to the FDA in the area of oral appliance therapy in 2004 and has been active in professional groups for some time. At present , she is President of the AADSM, a member of  the Board of Directors of the Massachusetts Sleep Society, on the editorial board of the Journal of Sleep And Breathing and holds the distinction of having the first certified dental sleep medicine office in New England. She continues to practice full-time in Weston, MA.


My Greatest Reward

Monday, February 4th, 2013

Dr. Stacy Geisler

July 7th, 2011 began like any other day for me. I remember that there was a beautiful  sunrise that morning. I had a compressed, busy schedule in my oral and maxillofacial surgery practice in Lake Oswego. “We have a trauma patient coming in, Doctor” my front staff informed me when I arrived at my office. We already had fifteen patients scheduled that morning for me to see, three of whom were surgery patients. How would I find the time to see this other patient?

My add on trauma patient turned out to be a wonderful woman named Sunny. From my first meeting with her, I could see why her friends had given her this affectionate nickname. Sunny has a type of effervescence which surrounds her. Joy bubbles out of her. You can’t help feeling good just by being in her presence.  At this first meeting, I was struck by her amazingly positive attitude. It was hard for her to speak clearly because part of her upper right jaw was missing. She kept holding up her hand to hide the right side of her face. Slowly she was able to tell me her story.

Sunny had been at an outdoor function with her soon to be husband on a Saturday afternoon. As she was walking along an unfamiliar path, her foot slipped and she went down. This happened so quickly that she was not able to break her fall, but landed on her right face against a curb. Stunned and bleeding profusely, she sat up. Part of her upper jaw was missing. Looking down, she saw what she thought were bits of bone and tooth on the ground.

Sunny’s partner took her immediately to the closest emergency room for care. They were hoping to have a diagnosis made and treatment. An exam was performed as well as imaging studies.  Since this hospital was not part of Sunny’s health maintenance organization (HMO), she was told by the emergency room to contact the HMO for definitive care. When she called the HMO that evening, she was told that she would have to wait a week for an exam and treatment (she was told this is their policy to allow for swelling to resolve). When Sunny was finally able to see a surgeon at her HMO hospital, it was six days later. The surgeon told her that she had a dental injury and would need to follow up with her dentist. There wasn’t anything he could do for her. She was sent home with a prescription for Amoxicillin.

Sunny called her dentist from the parking lot of the HMO in tears. She knew that something was seriously wrong with her and she was struggling to understand why she couldn’t get the care she needed. Her dentist’s receptionist asked her to come in to his office immediately. When the dentist saw Sunny, he knew that this was more than a dental injury. He could see that part of her upper jaw appeared to be missing, as well as teeth in the anterior maxilla. His office called my office, thus the “add-on” patient for an already busy morning.

Examination of Sunny demonstrated a severe, avulsive injury involving the right anterior maxilla. Computed tomography scanning performed at the emergency room six days previously demonstrated fractures extending through the frontal process of the right maxilla, including the anterior nasal spine and vomer. She had fractured teeth #7 and #8 which were displaced into the right maxillary hard palate and not visible in the oral cavity. Tooth #9 also was extruded and was in hyperocclusion with her mandibular dentition.

Sunny’s dentist had sent electronic records for me to review and I was able to review her CT scan. I was stunned by the severity of her injury. At this point in my career, I have seen many, many things. Not much surprises me any more when it comes to the maxillofacial skeleton. But I was not prepared for how bad this injury was given the mechanism of injury. What Sunny had was more similar to a gun shot wound without the accompanying soft tissue devastation seen with a high velocity injury.

I knew that Sunny needed surgery and that she needed it soon. I also knew that she needed to be asleep for what I was planning for her. Since she had eaten that morning, we scheduled her for surgery the next day. I explained to her the nature of her injuries, that the wound needed to be cleaned, the broken bones stabilized and the damaged teeth removed. I explained that she might need root canals on some of her other teeth, and that she might require more extensive reconstructive surgery to rebuild the missing part of her jaw. I told her that she would also probably require dental implants since her teeth were damaged beyond repair. I prescribed antibiotics and pain medication for her to begin immediately. Sunny agreed to everything that I suggested. One concern was her upcoming wedding. Could I have all the reconstruction done in time for her wedding which was scheduled for December 2012? I told Sunny that I would try my best.

Over the next year Sunny underwent several surgeries to rebuild her maxilla. We began with debridement and fixation of broken bones. As I suspected, the right anterior maxilla had been pulverized by her fall and her wound was quite dirty. I found pebbles and asphalt at that first surgery.  I confirmed that Sunny would require a large bone graft to reconstruct her upper jaw if she ever had any hope of having a normal facial appearance. Hip grafting to the right maxilla was completed in February of 2012 and three dental implants were placed in June 2012.

Sunny handled all aspects of her year long reconstruction with grace and humor. She is a third grade teacher and saw an opportunity to use her injury to teach her class of eight year olds about anatomy and jaw reconstruction. She told me on one follow up visit, “I took out my prosthesis and showed my students how I was missing teeth, just like them. The kids loved it and had all kinds of questions about how my teeth would be put back. They couldn’t believe that part of my hip would become my new jaw!”

It was an amazing privilege to provide surgical care for Sunny following her facial injury. I feel so grateful that things went well: healing progressed as expected and we achieved the outcomes we were hoping for.  I can’t claim sole responsibility for her healing. Sunny’s reconstruction was brought about by a dedicated group of professionals whose sole goal was to restore her to health.

Sunny’s health maintenance organization initially denied medical  benefits for her reconstruction. Several letters were written from those involved in Sunny’s care and eventually she received the benefits needed to cover the cost of her reconstruction. Martha, my front office insurance expert, was instrumental in making this happen. I am grateful to Sunny’s dentist who recognized that she needed speciality care. I also feel lucky to have such a positive working relationship with Dr. Scott Dyer, who handled Sunny’s prosthodontic reconstruction.

Sunny recently stood before her friends and family as a bride and made a commitment to her partner just a few weeks ago. She told me via email “The wedding was spectacular and everything that we had both hoped for.” For a surgeon, there just isn’t any higher reward than that.

Stacy Geisler, DDS, PhD is a board certified oral and maxillofacial surgeon practicing in Lake Oswego, Oregon. She lectures extensively throughout the Pacific Northwest and is known for providing outstanding surgical care of her patients. Dr. Geisler serves as an evidence-based reviewer for the JOurnal of the American Dental Association and has had numerous peer-reviewed publications.


Oral Health: A Window To Drug Addiction

Monday, October 8th, 2012

By: Victor J. DeNoble, Ph.D. & Kimi F. DeNoble, MS

Research has shown that oral health problems are very common among people who are addicted to drugs.  Many abused drugs produce chronic tooth decay, cracked teeth, gingivitis and other forms of gum disease.  For example, alcohol is high in sugar which contributes to an increase in tooth decay and frequent chronic consumption can de-mineralize tooth enamel.  Stimulants like ecstasy, amphetamines or cocaine cause severe clenching and grinding of teeth, as well as dry mouth when the individual is under the influence of the drug.  Users of stimulants are also known to have a high intake of sugar.  This combination of side effects can cause serious tooth decay.  Methamphetamine prevents saliva from being produced that results in a condition called “meth mouth” which is characterized by discoloration, rotting and broken teeth, as well as  extreme tooth decay.  The chemical composition of methamphetamine includes a wide range of highly toxic chemicals such as lithium, and muriatic and sulfuric acids all of which are highly corrosive.  Tobacco can cause a wide range of oral problems such as delayed wound healing, sinusitis, soft tissue damage and oral cancer.

Because the relationship between substance abuse and oral pathology is well documented, the dental visit can provide the ideal setting for drug abuse identification and intervention.  In addition, having an understanding drug addiction will assist dental professionals in making decisions when medications with potential for abuse are being considered as part of the overall treatment paradigm for these patients.

Years ago, drug addiction was viewed as a character flaw, an inability to control one’s own behavior.  Today, we know that drug addiction is a disease.  Further, it is a self-inflicted disease; no one addicts us, we addict ourselves.  The motive for drug addiction varies from person to person but the decision to use and eventually abuse the drug is still an individual choice.  Drug addiction is not an event that happens all at once.  It’s a biochemical process that takes time and will eventually result in long-term changes in brain function.  These changes are the underlying mechanism for compulsive drug abuse.  The time it takes to complete this biochemical change varies for each drug.  For some drugs like methamphetamine or crack cocaine, the brain changes can occur in one to three weeks. However, with other drugs such as alcohol or tobacco, the process can take several months.  No matter how long or short the process is the first time, re-addiction for all drugs is fast – – sometimes it can occur within a day.  Therefore, once you are addicted to a drug, you are at risk for re-addiction for the rest of your life.  This makes the choice of pain management medication in dental and medical procedures more difficult.

Everyone is born with specific areas of the brain that recognize and respond to addictive drugs; therefore no one is immune from addiction.  In fact, we are all at risk for addiction.  Once an addictive drug enters our blood, it will be transported to the brain and the process of altering brain function begins.  But why do people use addictive drugs?  Simple.  Addictive drugs make us feel good, at least for a brief period of time.  The major neurotransmitter mediating the addictive process is dopamine.  Dopamine has a wide range of functions in the brain, however, the feeling of happiness is mediated in the mesolimbic system. The mesolimbic system is commonly called the “pleasure center”.  When dopamine levels are normal, we feel comfortable.  If they fall, we can be depressed and, if they rise sharply, we can experience euphoria.  All drugs that are addicting change the way dopamine functions in the mesolimbic dopamine system.  The mechanism for dopamine alteration for each addictive drug is different.  These different mechanisms explain why we can be addicted to several drugs at the same time.  Unlike the normal release of dopamine, when drugs are used to activate this system the resulting dopamine response goes far beyond what the system is supposed to produce and the process of addiction begins.

Addictive drugs make us feel good but the feel good feature of these drugs does not lead to health problems.  Aside from the oral manifestations, these drugs have a wide range of pharmacological side effects that have  other health consequences.  For example, cocaine makes us feel good for about 40-60 minutes, however, the side effects of cocaine put the user at risk for potential life threatening conditions for days.  Atrial fibrillation induced by cocaine has been shown to last for up to 3 days whereas cocaine is metabolized and excreted within 24 hours.  Cocaine renders the addict at risk for heart attacks, strokes, kidney failure and pulmonary embolisms.  Each addictive drug has its own constellation of unique side effects that can be further reviewed at the National Institute of Drug Abuse website.

Research has shown that drug addiction results in dental complications many of which will appear before other less visible complications, e.g., organ failure.  Since many Americans visit their dentists more often than they visit their physicians, dental professionals have an increased likelihood of detecting drug abuse and therefore an increased potential for intervention.


Dr. DeNoble has a Doctorate in Experimental Psychology from Adelphi University, NY and two postdoctoral fellowships from NIAAA and NIDA.  He was recruited by Philip Morris to study the behavioral and physiological effects of nicotine on the brain.  He subsequently conducted drug discovery research in CNS diseases for the pharmaceutical industry.  In 1994, after a congressional release from a confidentially agreement with Philip Morris, he testified before Congress and became a key witness in the federal government’s case against the tobacco industry. Currently, he is the Vice President of Hissho, Inc., a scientific and medical communications company.

Dental X-Rays

Monday, August 6th, 2012

By Dr. Medhi Salari

Benefits of Dental X-rays

Dental X-rays help us detect cavities, infections, gum disease, cysts, tumors and developmental abnormalities much sooner than waiting for these problems to get large enough to become evident to the naked eye; or painful enough to become uncomfortable and noticeable to the patient.

Dentistry has led the healing professions in preventive care since the 1940’s and x-rays help us each and every day in finding and treating dental disease in its earliest and easiest to treat stages.

Patients who receive regular exams and x-rays tend to retain their teeth for life, while patients who go without exams and x-rays tend to have more extensive dental work, such as root canals and extractions.  By the time the problem has become uncomfortable or noticeable to the patient, the decay or problem has already progressed too far.

Risks of Dental X-rays

A large number of patients cite exposure to radiation as a concern in consenting to regular dental x-rays and exams.  We gathered the following information from the American Nuclear Society website to put the amount of radiation from Dental X-rays in perspective.

Source of Radiation

Estimated Exposure (mrem)

Air Travel

0.5 per HOUR

Dental Bitewings (4 films)


Dental Complete Series of X-rays


Medical Chest X-ray (1 film)


Natural Radiation from the ground

30 per year

Natural Cosmic Radiation in Central Oregon (elev. 3,000 – 4,000 ft.)

41 per year

Medical X-ray – Mammography


Medical CT Scan – Head


Internal Radiation from food & air

268 per year

Medical Upper GI X-rays


Medical CT Scan of Abdomen/Pelvis


 As you can see from the table above, radiation exposure from dental x-rays is extremely low, in comparison to other forms of radiation that we are routinely and often times naturally exposed to.  We also take the added precaution of routinely covering our patients with a lead apron and Thyroid collar to further minimize the already low exposure levels.

International standards have recommended a maximum amount of radiation for humans working with or around radioactive materials at 5,000 mrem per year.  The average accumulated amount of radiation per person is approximated at 620 per year.  You can calculate your own annual radiation dose by visiting the American Nuclear Society website (, and clicking ‘Public Information’, ‘Resources’ and then ‘Dose Chart’.

General Recommendations & Protocol

Our goal is to take the very best care of your teeth and mouth as possible.  In order to do that, we need periodic x-rays to properly diagnose and treat conditions that might exist or arise in your mouth.

We realize that different patients and different dental conditions require different protocols.  We have always strived to minimize our patient’s x-ray exposure and at the same time reduce the costs associated with necessary x-rays.

We do not have a one-size fits all x-ray routine in our office, but have tailored our X-ray Protocol to benefit each specific patient’s dental and medical conditions.

Patients who have a higher risk of decay, multiple existing restorations or more complex treatment plans require more frequent and regular dental x-rays.

Patients who have experienced fewer cavities and restorations in their past, and have exhibited a smaller risk of dental disease, will continue to have less frequent dental x-rays recommended to them.

Our X-ray Protocol also takes into account numerous other important factors; such as pregnancy, patient’s age, list of medications and concurrent medical conditions (dry mouth, acid reflux, concurrent radiation therapy, …).

We will continue to honor the trust that our patients have placed in us, by taking the necessary steps to properly diagnose and treat their dental problems, while remaining respectful of our patient’s wishes for a protocol that caters to each patient as an individual.

With our X-ray Recommendations and Protocols, we hope to provide the right balance between our patient’s wishes for reduced exposure to radiation and the Oregon Board of Dentistry’s Standard of Care for dental practices.

Excerpts from  American Dental Association ( and American Nuclear Society ( 


Dr. Mehdi Salari is a 1993 graduate of the OHSU School of Dentistry.  He has been in private practice in Bend, Oregon for 19 years and along with his wife, have three kids under the age of nine.  He is a Past President of the Central Oregon Dental Society.  He has been actively involved in the Central Oregon soccer community through coaching, playing and officiating.  He also volunteers with the Central Oregon Community College Dental Assisting Program, Healthy Beginnings, Volunteers in Medicine and the Kemple Children’s Clinic Give Kids a Smile program.


Forensic Dentistry

Monday, July 23rd, 2012

By Dr. James Wood, DDS

Forensic Dentistry. It isn’t exactly what you see on “CSI” or “NCIS.” There is no way to be out in the field with skeletal remains, dictate the fillings to some federal agency and magically have an identity in seconds. There is no international repository of teeth that would allow us to match them up to a bitemark.

Forensic Dentists assist law enforcement, coroners, and the legal system in a variety of ways – dental identification, bitemark analysis, documentation of injuries, fraud investigation. The lion’s share of the work is in the realm of human identification by dental means.

The most critical information necessary to assist a forensic dentist in a dental identification is complete and accurate antemortem (before death) records. I can’t stress enough how important these records are – especially original dental xrays and charting. Since we are dealing with often minute details original xrays make a huge difference in comparing boney trabeculae, the floor of the sinus, even an overhang of restorative material, or calculus. We don’t serve to critique anyone’s dentistry and I only use the records to make an identification. When a law enforcement agency, coroner or medical examiner requests your records you should copy them for yourself and submit the originals. HIPPA no longer applies when this request is made. If you elect to resist the request, the agency will return with a court-order – probably in the middle of your day with a reception room full of patients……… Consider the family of the deceased that is looking for answers. With good antemortem records and sufficient postmortem remains to examine and compare to, an identification can happen very quickly in most cases. This saves the investigating agency significant time and resources and helps the family begin the process of closure on their loss.

People often ask me how they can get into the field of Forensic Dentistry. My first response is always the same – get as much education in the field as you can. There are a variety of educational opportunities available. A good place to start looking for courses is through the American Society of Forensic Odontology ( This is the entry level organization for forensic dentists (or odontologists) and has an annual meeting in conjunction with the American Academy of Forensic Sciences ( There are some excellent courses out there and the costs are very reasonable. Once you have some background education you become more than someone just looking over the shoulder in an autopsy – you become a potential resource.

No television show can ever really capture the essence of or prepare you for examining a deceased person. It can be overwhelming to all of your senses. Those of us who perform this work on a regular basis have learned to compartmentalize a lot of things to deal with the individual cases we work on. However, it is one of the most professionally rewarding things that I do in the practice of dentistry.


Dr. Wood is a graduate of Loma Linda University of Dentistry.  He has maintained a family practice in Cloverdale since 1987. Dr. Wood is a Forensic Dental Consultant to six northern California counties and the California Department of Justice Missing/Unidentified Persons Unit. Dr. Wood was a co-found of the California Dental Identification team. He is also a member of the Federal Disaster Mortuary Operational Response Team. Dr. Wood is an active member of his community. He is a member of the Healdsburg City Council and served as the mayor in 2012.

Trends in Endodontic Therapy: Regenerative Endodontics

Monday, June 25th, 2012

By Aaron Welk, D.M.D.

One of the challenges in endodontics is the treatment and management of an immature tooth with a necrotic pulp.  Traditional treatment approaches include creation of a hard barrier which root canal filling material can be obturated against.   This root end closure procedure is called apexification.  Calcium hydroxide apexification is a procedure that allows for the induction of a hard tissue barrier apically [1].  One of the disadvantages of this approach is it can take a many months for the barrier to form.

The introduction of Mineral Trioxide Aggregate (MTA) in the 1990’s allowed for a similar approach [2] to creating apical barriers in a timelier manner [3].  With MTA apexification, an immediate barrier could be placed.   Both calcium hydroxide and mineral trioxide aggregate have been proven clinically, but with the absence of continued root development, both techniques leave the roots with thin dentin walls and short overall root length, leaving the tooth more susceptible to failure due to root fracture [4].

Regenerative endodontics is a contemporary approach to addressing this problem.  This procedure uses tissue engineering principles in facilitating the continued growth and development of the pulp-dentin complex.  In other words, when you have a case with an immature apex and necrotic pulp, regenerative endodontics allows for continued root development, thicker dentin walls, longer root length, and a closed apex, thus reducing the risk of fracture during tooth function.

Success is dependent on the activity of a newly identified population of stem cells, the so-called stem cells from apical papilla (SCAP) (Fig. 23-38) [5], a hidden treasure with enormous potential for tissue regeneration and bioroot engineering [6].


All immature teeth with open apices may be considered candidates for regenerative treatment, even if they have obvious pulp-space infection, a discharging sinus, or have been previously root canal treated [7].

Bioengineering has a tremendous potential in dentistry.  Researchers continue to optimize scaffolds that may encourage revascularization of the pulp space, and to explore the options of seeding cell populations into the properly sterilized pulp spaces of immature teeth [8].  Dentistry’s call for action has never been louder as we seek effective, biologically based treatments for our pediatric patients.  If you have questions about pulp regenerative procedures, I encourage you to contact your local endodontist to discuss this topic.

The pulp regeneration procedure is as follows [9]:

Case Selection

  • Tooth with necrotic pulp and an immature apex
  • Pulp space not needed for post/core, final restoration
  • Compliant patient
Informed Consent
  • Two (or more) appointments
  • Use of antimicrobial(s)
  • Possible adverse effects: staining of crown/root, lack of response to treatment, pain/infection
  • Alternatives: MTA apexification, no treatment, extraction (when deemed nonsalvageable)
  • Permission to enter information into AAE database (optional)
First Appointment
  • Local anesthesia, rubber dam isolation, access
  • Copious, gentle irrigation with 20ml NaOCl using an irrigation system that minimizes the possibility of extrusion of irrigants into the periapical space (e.g., needle with closed end and side-vents, or EndoVac). To minimize potential precipitate in the canal, use sterile water or saline between NaOCl. Lower concentrations of NaOCl are advised, to minimize cytotoxicity to stem cells in the apical tissues
  • Dry canals
  • Place antibiotic paste or calcium hydroxide. If the triple antibiotic paste is used: 1) consider sealing pulp chamber with a dentin bonding agent [to minimize risk of staining] and 2) mix 1:1:1 ciprofloxacin:metronidazole:minocycline
  • Deliver into canal system via Lentulo spiral, MAP system or Centrix syringe
  • If triple antibiotic paste is used, ensure that it remains below CEJ (minimize crown staining)
  • Seal with 3-4mm Cavit, followed by IRM, glass ionomer cement or another temporary material
  • Dismiss patient for 3-4 weeks
Second Appointment
  • Assess response to initial treatment. If there are signs/symptoms of persistent infection, consider additional treatment time with antimicrobial or alternative antimicrobial.
  • Anesthesia with 3% mepivacaine without vasoconstrictor, rubber dam, isolation
  • Copious, gentle irrigation with 20ml EDTA, followed by normal saline, using a similar closed-end needle.
  • Dry with paper points
  • Create bleeding into canal system by over-instrumenting (endo file, endo explorer)
  • Stop bleeding 3mm from CEJ
  • Place CollaPlug/Collacote at the orifice, if necessary
  • Place 3-4mm white MTA and reinforced glass ionomer and place permanent restoration
Clinical and Radiographic exam:
  •  No pain or soft tissue swelling (often observed between first and second appointments
  • Resolution of apical radiolucency (often observed 6-12 months after treatments
  •  Increased width of root walls (this is generally observed before apparent increase in root length and often occurs 12-24 months after treatments
  • Increased root length

Dr. Welk is a 1998 graduate of the OHSU School of Dentistry.  He received his specialty certificate in endodontics in 2002 from OHSU.  Dr. Welk is a Diplomate of the American Board of Endodontics.  He is past-president of the Oregon State Association of Endodontics, past-president of the Clackamas County Dental Society, and currently serves on the board of trustees for the Oregon Dental Association.  He maintains a private practice in West Linn, Oregon.




1.  Attala MN, Noujaim AA: Role of calcium hydroxide in the formation of reparative dentin. J Can Dent Assoc  1969; 35:267.

2.  Tittle KW, Farley J, Linkhardt M, Torabinejad M: Apical closure induction using bone growth factors and mineral trioxide aggregate. J Endod  1996; 22:198.(abstract #41)

3.  Pradham DP, Chawla HS, Gauba K, Goyal A: Comparative evaluation of endodontic management of teeth with unformed apices with mineral trioxide aggregate and calcium hydroxide. J Dent Child  2006; 73:79.

4.  Andreasen JO, Farik B, Munksgaard EC: Long-term calcium hydroxide as a root canal dressing may increase risk of root fracture. Dent Traumatol  2002; 18:134.

5.  Hargreaves KM, Law AS. Regenerative Endodontics. Chapter 16. Pathways of the Pulp 10th ed. Eds, Hargreaves KM, Cohen S. Mosby Elsevier, St Louis, MO, 2011: 602-19.

6.  Huang G T-J, Sonoyama W, Liu Y, Liu H, Wang S, Shi S: The hidden treasure in apical papilla: the potential role in pulp/dentin regeneration and bioroot engineering. J Endod  2008; 34:645.

7.   Iwaya S, Ikawa M, Kubota M: Revascularization of an immature permanent tooth with apical periodontitis ands inustract. Dent Traumatol  2001; 17:185.

8.  Murray PE, Garcia-Godoy F, Hargreaves KM: Regenerative endodontics: a review of current status and a call for action. J Endod  2007; 33:377.

9.  Considerations for Regenerative Procedures.  web.  11 Jun. 2012

Protect Your Teeth, Wear a Mouthguard!

Monday, April 9th, 2012

By Dr. Teri Barichello

Soccer players don’t question wearing shin guards, football players their helmets, volleyball players their knee pads. Clearly shins, heads and knees are worth protecting. Why then don’t we place the same value on our teeth? Why isn’t the use of mouthguards just as routine as other protective measures?

Millions of children and adults participate in sports and recreation activities, and depending on the activity, they are at an increased risk of sustaining dental injury. When teeth sustain a traumatic blow or injury, the damage can often lead to permanent alteration in appearance or irreversible changes to its function. A single accident can create the need for lifelong follow-up care and maintenance.

April is National Mouthguard Month. The intention is to draw attention to the increasing and serious issue of oral trauma and injury as a result of sports and recreation activities. One in six sports related injuries is to the craniofacial area. Football, boxing, basketball, lacrosse and hockey are obvious examples of high contact, high risk activities but injuries aren’t confined to these sports. Often participating in non-contact sports results in dental trauma. Some of the most traumatic injuries have been reported as a result of baseball, bicycling, gymnastics or skateboarding. Studies show that while young boys show a slight higher prevalence of dental injury than girls, that gender difference evens out as they enter young adulthood.

The great news is that we can all easily protect our smiles by wearing a properly fitted mouthguard.

There are three types of athletic mouthguards, two of them are available over the counter and one is custom fabricated by a dentist. The over the counter versions offer convenience and are lower cost but have limitations in their comfort and level of protection. The first over the counter type is a pre-sized, stock version. They are generally available is sizes S-L and there is no customization for fit. They often don’t fit comfortably and wearers usually need to hold their teeth together to keep them in. For this reason, this type is considered to be less protective. The second over the counter type is commonly called a “boil and bite”.  The guard is warmed in boiling water then self adapted to the users mouth. This type has better retention than the stock version but is often bulky which can make it hard to speak or breathe. For optimal protection, there needs to be certain thickness of material in key areas.  This is a concern with the boil and bite due to the self adaptation process which often leads to dangerously thin areas. In addition, lab impact tests have shown that the boil and bite mouthguard has less adequate cushioning and shock absorption than that available with a custom fit. A custom made mouth guard is by far the most protective and comfortable type of guard. This version requires a visit to your dentist who will take impressions and either fabricate it onsite or send it to a laboratory for a precise, customized fit. Custom versions tend to be more expensive, but offer superior protection, are far more comfortable and are more easily adaptable to orthodontic appliances. The expense incurred to have a proper mouthguard made could save a person thousands of dollars if there is damage from an accidental injury.

Mouthguards for All!

The use of a mouthguard is not age dependent. It is recommended for all people, young and old, who participate in activities with the risk of injury to the face or teeth. When parents consider enrolling a child in an activity, they are recommended to have a conversation with their dentist to discuss the level of risk and whether a guard is appropriate. Good habits start young, so there will be increased acceptance and compliance by young adults if wearing a mouthguard has been part of their routine all along.


Dr. Barichello is a 1998 graduate of the OHSU School of Dentistry.  She was a private practicing general dentist in Oregon City for 13 years before taking her current position as Vice President and Chief Dental Officer at The ODS Companies.  She is a Past President of the Oregon Dental Association and trains in the high contact martial art, Poekoelan, for which she is an avid proponent of the use of mouthguards.