Monday, March 31, 2014

World Back Up Day

It's on March 31st! It's not only a day for backing up your personal data, but it's also a day to talk about the enormous task of preserving our increasingly digital heritage and cultural works for future generations.
We're aiming to reach those who have never backed up in their life, and might not even know what backup is!
However, we also like to say that World Backup Day is every day! A good backup plan will be continuous and include multiple layers to not only recover your data but also include steps for data preservation.
The original idea for the March 31st date was a humorous reference to April Fool's Day on April 1st.

Learn more on backing up your data

Friday, March 28, 2014

Prevention of dental erosion of a sports drink by nano-sized hydroxyapatite in situ study



To evaluate the inhibitory effects of the sports drink containing nano-sized hydroxyapatite (nano-HA) on dental erosion in situ.


The study had a single-blind, two-treatment crossover design. The two treatment groups were a control group (CG; Powerade only) and an experimental group (EG; 0.25% wt/vol nano-HA was added to Powerade). Ten subjects wore removable palatal appliances containing bovine enamel specimens. The appliances were immersed in each drink for 10 mins, 4 times a day for 10 days. The tooth surface microhardness (SMH) was tested, and the erosion depth and the morphology of the tooth surface were observed. The data were analysed by repeated measures anova and t-test.


Between the baseline and the 10th day, SMH was decreased by 80% in the specimens of the CG (P < 0.001), whereas there was only a 6% decrease in the SMH of the specimens in the EG. An erosion depth of 12.70 ± 4.66 μm and an irregular tooth surface were observed on the 10th day in the specimens of the CG. No dental erosions, however, was observed in the specimens of the EG.


The sports drink containing 0.25% nano-HA was effective in preventing dental erosion in situ.

Thursday, March 27, 2014

REACH® Introduces Disposable Prophy Angles

New Product Offers Superior Performance, Ease-of-Use and Patient Comfort

(Buena Park, CA – March xx, 2014) REACH® is unveiling its newest professional innovation, Disposable Prophy Angles.  Engineered with a low-profile design, REACH Disposable Prophy Angles allow for superior access to areas of the mouth that are harder to reach.  Made in the USA, these prophy angles are latex-free, individually wrapped, and come pre-lubricated for a smooth, quiet performance.
REACH Disposable Prophy Angles fit all low-speed handpieces, and clinicians can choose from a variety of soft, splatter-reducing cup styles.  As with all REACH products, this new offering continues to carry forward the brand’s reputation for “performance with a purpose.”

Reach Disposable Prophy Angles are manufactured and distributed by Buena Park-based Dr. Fresh LLC.

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About Dr. Fresh LLC.

Dr. Fresh LLC ( is an oral care company dedicated to helping families live better, healthier lives.  As one of the fastest growing oral care companies in the U.S., Dr. Fresh provides great brands that provide innovative solutions and remarkable value. Established in 1998, Dr. Fresh offers quality personal care products including its top-selling Firefly® flashing toothbrush for kids, Reach® professional and consumer products for high performance brushing, Binaca® breath freshening products, and Dr. Fresh® branded products with their focus on value and affordability.  With a broad international business, Dr. Fresh operates three offices globally (US, UK, and China), and has distribution in over 35 countries. 

Wednesday, March 26, 2014

Ion release and mechanical properties of calcium silicate and calcium hydroxide materials used for pulp capping




To compare the ion release and mechanical properties of a calcium hydroxide (Dycal) and two calcium silicate (MTA Angelus and Biodentine) cements.


Calcium and hydroxyl ion release in water from 24-h set cements were calculated from titration with HCl (n=3). Calcium release after 7, 14, 21 and 28 days at pH 5.5 and 7.0 was measured using ICP-OES (n=6). Flexural strength (FS) and modulus (E) were tested after 48-h storage and compressive strength (CS) was tested after 48 h and 7 days (n=10). Ion release and mechanical data were subjected to ANOVA/Tukey and Kruskal-Wallis/Mann-Whitney tests, respectively (α=0.05).


Titration curves revealed that Dycal released significantly fewer ions in solution than calcium silicates (p<0 .001="" 21="" 24="" 5.5="" 7.0="" after="" and="" angelus="" at="" biodentine="" by="" calcium="" cements="" compressive="" constant="" days="" dropped="" dycal="" flexural="" had="" higher="" ion="" it="" modulus="" more="" mta="" other="" p="" ph="" release="" released="" remained="" significantly="" strength="" superior="" than="" the="" while="">


Immediate calcium and hydroxyl ion release in solution was significantly lower for Dycal. In general, all materials released constant calcium levels over 28 days, but release from Dycal was significantly lower than Biodentine and MTA Angelus depending on pH conditions. Biodentine had substantially higher strength and modulus than MTA Angelus and Dycal, both of which demonstrated low stress bearing capabilities.

Tuesday, March 25, 2014

Clinical efficacy of a computerised device (STA™) and a pressure syringe (VarioJect INTRA ™) for intraligamentary anaesthesia

I use the STA for 99% of my injections. MJ

European Journal of Dental Education




To evaluate the impact of experience whilst using different devices for intraligamentary anaesthesia, dental students tested clinical anaesthetic efficacy of a mechanical (PDL-S) and a computer-controlled (CCLAD) application system in restorative patients.

Material and methods

In a prospective study, 41 Patients in need of restorative treatment in lower posterior mandible were randomised into three groups (PDL-S: teeth n = 22; CCLAD: teeth n = 20; inferior alveolar nerve block (IANB): teeth n = 20). Dental last year students conducted anaesthesia and dental treatment. Primary objectives were differences in pain during treatment [numeric rating scale (NRS)] as well as in anaesthetic efficacy (complete/sufficient vs. insufficient/no effect) between PDL-S and CCLAD. Pain of injection, need for second injections, amount of anaesthetic solution and duration of local numbness were assessed. IANB as gold standard was compared to each system descriptively.


PDL-S had a significant lower pain during treatment (P = 0.017) but a similar anaesthetic efficacy (P = 0.175) compared to the CCLAD system. Concerning pain of injection (P = 0.42), quantity of second injections (P = 0.232), amount of used solution (P = 0.073) as well as duration of local numbness (P = 0.253), no differences were seen. When comparing both periodontal ligament injection (PDL)-systems with IANB, pain rating was higher when using CCLAD. Injection pain, amount of used solution as well as soft tissue anaesthesia was less for PDL-S and CCLAD.


Both PDL techniques showed a good success for dental routine treatments. Although, compared to the mechanic device, the CCLAD system might need more clinical daily experience.


We recommend including specific trainings in intraligamentary anaesthesia in the dental curriculum.

Monday, March 24, 2014

Epigenetics and oral health

Epigenetics: a new frontier in dentistry DOI: 10.1111/adj.12155

A visit to the dentist could one day require a detailed look at how genes in a patient's body are being switched on or off, as well as examining their pearly whites, according to researchers at the University of Adelaide.
In a new paper published in the Australian Dental Journal, researchers from the University of Adelaide's School of Dentistry have written about the current and future use of the field of epigenetics as it relates to oral health.
Speaking on Dentist's Day, co-author Associate Professor Toby Hughes says epigenetics has much to offer in the future treatment and prevention of dental disease.
"Our genetic code, or DNA, is like an orchestra - it contains all of the elements we need to function - but the epigenetic code is essentially the conductor, telling which instruments to play or stay silent, or how to respond at any given moment," Associate Professor Hughes says.
"This is important because, in the case of oral health, epigenetic factors may help to orchestrate healthy and unhealthy states in our mouths. They respond to the current local environment, such as the type and level of our oral microbes, regulating which of our genes are active. This means we could use them to determine an individual's state of health, or even influence how their genes behave. We can't change the underlying genetic code, but we may be able to change when genes are switched on and off," he says.
Associate Professor Hughes is part of a team of researchers at the University of Adelaide that has been studying the underlying genetic and environmental influences on dental development and oral health.
He says that since the completion of the Human Genome Project in 2007, epigenetics has had an increasing role in biological and medical research.
"Dentistry can also greatly benefit from new research in this area," he says. "It could open up a range of opportunities for diagnosis, treatment and prevention.
"We know that our genome plays a key role in our dental development, and in a range of oral diseases; we know that the oral microbiota also play a key role in the state of our oral health; we now have the potential to develop an epigenetic profile of a patient, and use all three of these factors to provide a more personalized level of care.
"Other potential oral health targets for the study of epigenetics include the inflammation and immune responses that lead to periodontitis, which can cause tooth loss; and the development and progression of oral cancers.
"What's most exciting is the possibility of screening for many of these potential oral health problems from an early age so that we can prevent them or reduce their impact."

Friday, March 21, 2014

Hu-Friedy Introduces Diamond Sharpening Cards


New sharpening product provides a unique and brand new

alternative to sharpening stones

CHICAGO (March 2014) Hu-Friedy, a global leader in the manufacturing of dental instruments, today introduces Diamond Sharpening Cards to their extensive portfolio of dental instrument sharpening products. A new innovation in instrument sharpening, the stainless steel Diamond Sharpening Cards offer a unique and revolutionary alternative to standard sharpening stones.

Diamond Sharpening Cards are coated on one side with a continuous surface of small industrial diamonds for superior hardness. The flat, hard stainless steel surface of the card will not easily groove or ditch over time.  About the size of a credit card, the Diamond Sharpening Cards will readily fit into instrument cassettes and sterilization pouches so clinicians can have a sharpening card readily available with each procedural set-up.

Available in extra fine, fine and medium grits, the Diamond Sharpening Cards are used with the same sharpening techniques as traditional sharpening stones. No oil is necessary for lubrication during sharpening procedures as the cards can be used dry or, if preferred, with water. 

“Sharpening is an important component of the care and maintenance of dental instruments. As leaders in hand instrumentation, Hu-Friedy is committed to supporting our customers with products that assist them in keeping our instruments in top working condition,” says Ken Serota, President of Hu-Friedy Mfg. Co. “The first of their kind in dentistry, our new Diamond Sharpening Cards are a convenient, long-lasting solution for sharpening that we believe our customers will be excited to try.”

In addition to the Diamond Sharpening Cards, Hu-Friedy offers a wide range of Arkansas, India and ceramic sharpening stones, as well as the automated Sidekick® Sharpener. Hu-Friedy also offers technical support and continuing education on sharpening for customers.

For more information about Hu-Friedy’s Diamond Sharpening Cards, please call 1-800-HU-FRIEDY or visit

About Hu-Friedy
Founded in Chicago in 1908, Hu-Friedy Manufacturing Company helps dental professionals perform at their best by producing dental instruments and products designed to function as an extension of each practitioner's particular skill. Its products, hand-crafted by highly-skilled artisans, are known for their precision, performance, longevity, reliability and quality. Headquartered in Chicago, Hu-Friedy products are distributed in more than 75 countries and the company maintains offices in Rotterdam, Tuttlingen, Germany, Milan, Shanghai and Tokyo.

Thursday, March 20, 2014

The Association Between Periodontal Disease and Seizure Severity in Refractory Epilepsy Patients

published online on Jan. 22 in Seizure: European Journal of Epilepsy   

Periodontal disease is very common worldwide and affects people at all socioeconomic levels. Researchers from Brazil have now investigated the link between seizures and periodontal status in epilepsy patients. They found that periodontal disease and seizure severity were correlated in the patient group.
In the study, researchers determined the periodontal disease status of 109 patients treated for epilepsy and a control group, and documented the patients' seizure frequency and use of medication.

They observed that patients were significantly more susceptible to poor oral hygiene, gingivitis and periodontitis compared with the controls. In addition, they found that seizure frequency was associated with poor oral hygiene, gingivitis and periodontitis. Therefore, epilepsy patients need to focus more on their oral health and quality of oral hygiene, the researchers concluded.

According to the Centers for Disease Control and Prevention (CDC), 1 in 2 U.S. adults aged 30 and over have periodontal disease. The World Health Organization estimates that the severe form of the disease, which may result in tooth loss, is found in 15–20 percent of middle-aged adults. Epilepsy affects about 2.3 million adults and 467,711 children in the U.S. alone, states CDC. About 150,000 new cases of epilepsy are diagnosed each year.

Wednesday, March 19, 2014

Rural Dentists of the Future: Dental School Enrollment Strategies

Journal of Dental Education
Volume 74, Number 8

The purpose of this study was to determine the relationship, if any, of a dental student’s 1) state of residency and 2) gender to his or her practice location in a rural Nebraska community after graduation. Previous research has demonstrated that dental students generally locate their practices near their place of rearing and that male graduates are more likely than female graduates to locate in rural areas. Dental student data for all University of Nebraska Medical Center College of Dentistry graduates from 1989 to 2008 (n=879) were analyzed. Descriptive and quantitative analyses were performed utilizing SPSS software (version 17.0). Chi-square and odds ratio analyses were also conducted. In contrast to previous research, women dentists whoremained in the state after graduation were more likely to locate their practice in a rural community than were male dentists: 59 percent and 48.5 percent, respectively. Nonresidents who remained in the state after graduation were also more likely to locate in a rural community than were residents: 69 percent and 51 percent, respectively. Dental schools may find this information useful as state officials and policymakers look to dental schools for leadership in addressing dental workforce needs, especially in rural/underserved areas.

Tuesday, March 18, 2014

Paperless Dental Office Survey

For my upcoming 2014 ADA lecture on the paperless dental office, I am running a very brief survey on the obstacles for having a paperless dental office. Please take the brief survey by following the link below and please share the video on your social media sites. Thank You!

Paperless Office Survey

Monday, March 17, 2014

Reasons for failures of oral implants

Article first published online: 11 MAR 2014
DOI: 10.1111/joor.12157
Cover image for Vol. 41 Issue 4
Journal of Oral Rehabilitation



This study reviews the literature regarding the factors contributing to failures of dental implants. An electronic search was undertaken including papers from 2004 onwards. The titles and abstracts from these results were read to identify studies within the selection criteria. All reference lists of the selected studies were then hand-searched, this time without time restrictions. A narrative review discussed some findings from the first two parts where separate data from non-comparative studies may have indicated conclusions different from those possible to draw in the systematic analysis. It may be suggested that the following situations are correlated to increase the implant failure rate: a low insertion torque of implants that are planned to be immediately or early loaded, inexperienced surgeons inserting the implants, implant insertion in the maxilla, implant insertion in the posterior region of the jaws, implants in heavy smokers, implant insertion in bone qualities type III and IV, implant insertion in places with small bone volumes, use of shorter length implants, greater number of implants placed per patient, lack of initial implant stability, use of cylindrical (non-threaded) implants and prosthetic rehabilitation with implant-supported overdentures. Moreover, it may be suggested that the following situations may be correlated with an increase in the implant failure rate: use of the non-submerged technique, immediate loading, implant insertion in fresh extraction sockets, smaller diameter implants. Some recently published studies suggest that modern, moderately rough implants may present with similar results irrespective if placed in maxillas, in smoking patients or using only short implants.

Friday, March 14, 2014

New CAD/CAM milling machine for your office

You can use this inexpensive mill for your open architecture CAD/CAM Milling in your office. Even does Zirconia! MJ
Roland Announces New ROI Calculator for DWX-4 Compact Dental Mill 
Award-Winning DWX Mills to be Featured at the Upcoming Lab Day East Conference, Booth L-5

Irvine, Calif., March 11, 2014 — Roland DGA Corp., a leading provider of dental CAD/CAM technologies, has introduced a new online ROI calculator for the DWX-4 compact dental mill.  The new calculator, located on the company’s website at, allows dental labs to instantly calculate the monthly cost savings of bringing DWX technology in-house for the production of restorations.  

“The DWX-4 is an ideal production platform for labs that currently operate through an outsourcing model, those just getting started in digital dentistry, and established digital labs that need a backup device for urgent, time-sensitive jobs,” said Brian Brooks, product manager for Roland DGA Corp.  “This new online tool will help labs make an informed business decision on whether to bring milling processes in-house.”   

Measuring 13” x 14” x 16” high, the DWX-4 allows professionals to mill a single crown or small bridge quickly, economically and to exacting specifications.  Based on proven CNC milling technology, it supports a wide variety of materials, including 3M ESPE’s Lava™ Ultimate Restorative, zirconia, PMMA and wax.  Open architecture by design, the DWX-4 integrates into an existing workflow with commercially available dental CAD/CAM software and hardware.  Roland EasyShape™ CAM software is included as well for a complete solution.   

In addition to the DWX-4, Roland offers the award-winning DWX-50, a 5-axis dental milling machine designed to handle greater complexity and volume production.  An enhanced ROI calculator is also available on the Roland website for the DWX-50.  DWX mills are offered through authorized Roland dental dealers and priced at $17,995 for the DWX-4 and $29,995 for the DWX-50.

Roland will demonstrate both DWX mills at the upcoming Lab Day East conference, April 4 – 5, 2014 in New York City, Booth L-5.

About Roland DGA Corp.

Roland DGA Corp.  serves North and South America as the marketing, sales and distribution arm for Roland DG Corp.  Founded in 1981 and listed on the Tokyo Stock Exchange, Roland DG of Hamamatsu, Japan is a worldwide leader in the sign, graphic arts, vehicle graphics, engraving, ADA signage, direct part marking, rapid prototyping, 3D modeling, and dental CAD/CAM industries. Roland DG is affiliated with Roland Corp., renowned in the music industry for developing MIDI technology and for producing digital music equipment including drums, keyboard synthesizers, recording equipment and other related technologies.

For more information on Roland DGA Corp., please call (800) 542-2307 or visit 

Thursday, March 13, 2014

Patients who have dental extractions before cardiac surgery are still at risk for poor outcomes

To pull or not to pull? That is a common question when patients have the potentially dangerous combination of abscessed or infected teeth and the need for heart surgery. In such cases, problem teeth often are removed before surgery, to reduce the risk of infections including endocarditis, an infection of the inner lining of the heart that can prove deadly. But Mayo Clinic research suggests it may not be as simple as pulling teeth: The study found that roughly 1 in 10 heart surgery patients who had troublesome teeth extracted before surgery died or had adverse outcomes such as a stroke or kidney failure.
The findings are published in The Annals of Thoracic Surgery.
Prosthetic heart valve-related endocarditis accounts for up to one-fourth of infective endocarditis cases and proves fatal for up to 38 percent of patients who develop it. In light of that high mortality rate, physicians try to address risk factors such as poor dental health before cardiac surgery. Removing diseased teeth at some point before surgery as a preventive measure is common, but research on whether that helps has been limited. Medical guidelines acknowledge a lack of conclusive evidence, the Mayo researchers noted.
The new study shows that the risk for patients who do have teeth removed before heart surgery "may be higher than we thought," says senior author Kendra Grim, M.D., a Mayo Clinic anesthesiologist.
"We are always concerned with improving safety, and pulling infected teeth before heart surgery seemed to be the safer intervention. But we became interested in studying this complex patient group, as many patients that come to the operating room for dental surgery just before heart surgery are quite ill," Dr. Grim says.
The study is believed to be the largest so far evaluating adverse outcomes after pre-cardiac surgery dental extractions. The researchers studied outcomes in 205 adult Mayo patients who had teeth pulled before cardiovascular surgery. The study covered January 1, 2003, through Feb. 28, 2013; 80 percent of the patients were men, the median age at the time of tooth extraction was 62, and the median time lapse between dental extraction and heart surgery was seven days. The research found:
Six patients, or 3 percent, died in the period between their tooth extraction and the planned cardiac procedure.
Another six died after heart surgery, all while still hospitalized.
Ten patients, or roughly 5 percent, had other major adverse outcomes after heart surgery, such as bleeding, stroke, kidney failure requiring dialysis, acute coronary syndrome or stroke-like transient ischemic attacks.
Due to unexpected complications or findings from dental surgery, at least 14 patients, or 7 percent, had to have heart surgery delayed.
More information is needed to understand why patients died or had other major adverse outcomes, the researchers say. In addition to the stress placed on the body by dental extraction and heart surgery themselves, potential factors include the severity of individual patients' heart disease, other serious health problems they may have had, and how they reacted to anesthesia.
The bottom line for patients and physicians, the researchers conclude: Rather than following a rule of thumb, physicians should evaluate each patient individually to weigh the possible benefit of tooth extraction before heart surgery against the risk of death and other major adverse events.
"We hope this study sparks future discussion and research," Dr. Grim says. "In the meantime, we recommend an individualized approach for these patients, to weigh their particular risk and benefit of a dental procedure before cardiac surgery with the information we have currently available."

Wednesday, March 12, 2014

A multi-centered clinical audit to describe the efficacy of direct supra-coronal splinting–A minimally invasive approach to the management of cracked tooth syndrome

Available online 28 February 2014



This audit looked at the use of direct composite splinting to manage cracked tooth syndrome (CTS).


Patients who had been assessed as having CTS were offered the treatment of a directly bonded, composite overlay restoration placed in supra-occlusion. Cases were reviewed up to 3 months later.


In all, 151 restorations were followed up in the audit of which 131 were successful at 3 months. The remaining 20 restorations failed due to pulp complications (11), failure of the composite (5) or intolerance to the high restoration (4). Of the 131, patients described transient problems with chewing (94), composite breakage (13), TMD (1), phonetics (1), increased mobility (1) and tender to chewing (1).


This is a successful non-invasive method of managing CTS in the short term for patients willing to accept transient effects.

Tuesday, March 11, 2014

Primary Molar Pulpotomy: A Systematic Review and Network Meta-Analysis



Pulpotomy is a common procedure to treat asymptomatic reversible pulpitis in primary molars. The aim of this study is to undertake a systematic review and a network meta-analysis to compare the clinical and radiographic outcomes of different pulpotomy procedures in primary molars.
Data: Three authors performed data extraction independently and in duplicate using data collection forms. Disagreements were resolved by discussion.
Sources: An electronic literature search was performed within MEDLINE (via PubMed), ScienceDirect, Web of Science, Cochrane, and ClinicalKey databases until December 2012. Medications for pulpotomy including formocresol, ferric sulfate, calcium hydroxide, and mineral trioxide aggregate (MTA), and laser pulpotomy are compared using Bayesian network meta-analyses. The outcome is the odds ratio for clinical and radiographic failure including premature tooth loss at 12 and 24 months after treatments amongst different treatment procedures. >37 studies were included in the systematic review, and 22 of them in the final network meta-analyses. After 18-24 months, in terms of treatment failure, the odds ratio for calcium hydroxide vs formocresol was 1.94 [95% credible interval (CI): 1.11, 3.25]; 3.88 (95% CI: 1.37, 8.61) for lasers vs formocresol; 2.16 (95% CI: 1.12, 4.31) for calcium hydroxide vs ferric sulfate; 3.73 (95% CI: 1.27, 11.67) for lasers vs ferric sulfate; 0.47 (95% CI: 0.26, 0.83) for MTA vs calcium hydroxide; 3.76 (95% CI: 1.39, 10.08) for lasers vs MTA.


After 18-24 months, formocresol, ferric sulfate, and MTA showed significantly better clinical and radiographic outcomes than calcium hydroxide and laser therapies in primary molar pulpotomies.
Clinical significance: The network meta-analyses showed that MTA is the first choice for primary molar pulpotomies. However, if treatment cost is an issue, especially when the treated primary molars are going to be replaced by permanent teeth, ferric sulfate may be the choice.

Monday, March 10, 2014

A Prospective Study of Clinical Outcomes Related to Third Molar Removal or Retention.

Am J Public Health. 2014 Feb 13. [Epub ahead of print]


Objectives. We investigated outcomes of third molar removal or retention in adolescents and young adults. Methods. We recruited patients aged 16 to 22 years from a dental practice-based research network in the Pacific Northwest from May 2009 through September 2010 who had at least 1 third molar present and had never undergone third molar removal. Data were acquired via questionnaire and clinical examination at baseline, periodic online questionnaires, and clinical examination at 24 months. Results. A total of 801 patients participated. Among patients undergoing third molar removal, rates of paresthesia and jaw joint symptoms lasting more than 1 month were 6.3 and 34.3 per 100 person-years, respectively. Among patients not undergoing removal, corresponding rates were 0.7 and 8.8. Periodontal attachment loss at distal sites of second molars did not significantly differ by third molar removal status. Incident caries at the distal surfaces of second molars occurred in fewer than 1% of all sites. Conclusions. Rates of paresthesia and temporomandibular joint disorder were higher after third molar removal. Periodontal attachment loss and incident caries at the distal sites of second molars were not affected by extraction status. (Am J Public Health. Published online ahead of print February 13, 2014: e1-e7. doi:10.2105/AJPH.2013.301649).

Friday, March 07, 2014


Registration now open for “The Perio-Restorative Partnership: A Roadmap to Clinical Success”

Chicago, IL – March X, 2014 —The American Academy of Periodontology (AAP) will host its annual Spring Conference with the 2014 theme, “The Perio-Restorative Partnership: A Roadmap to Success,” at the Hilton Chicago from April 26 - April 27, 2014. Attendee registration is open, and all members of the dental team are encouraged to register to learn about the latest advancements and techniques in collaborative care while networking with peers.

According to AAP President Stuart J. Froum, DDS, attending the 2014 Spring Conference brings value to all dental professionals. “The Academy has secured leading experts in the field to provide nearly 10 hours of real-world, relevant clinical information to help us work together more efficiently and make our practices more successful,” said Dr. Froum. 

The two-day educational and interactive conference covers a variety of topics that promote professional growth and guide clinicians in providing the best possible periodontal care while also giving attendees the opportunity to earn continuing education (CE) credits.

Lecture topics include:

·       Periodontal and Implant Therapy
·       Periodontitis Risk-Assessment
·       Perio-Systemic Relationships
·       Predictable Esthetic Results
·       Techniques for Implant-Supported Restorations

“This year’s Spring Conference, encouraging the practice of collaborative care, offers a unique experience for many dental professionals to team-up in an educational and social setting that enables clinicians to engage in new, exciting ways,” says Froum. “The best in periodontal education combined with the diverse sights and sounds of Chicago make this a must-attend event!”
The American Academy of Periodontology would like to thank Henry Schein for their generous support of the 2014 Spring Conference.

To register or for more information visit:, call 800-282-4867 x3213, or email

About the American Academy of Periodontology:
The American Academy of Periodontology (AAP) is the professional organization for periodontists – specialists in the prevention, diagnosis, and treatment of diseases affecting the gums and supporting structures of the teeth, and in the placement of dental implants. Periodontists are also dentistry’s experts in the treatment of oral inflammation. They receive three additional years of specialized training following dental school, and periodontics is one of the nine dental specialties recognized by the American Dental Association. The AAP has 8,300 members worldwide.

NOTE: Members of the media are encouraged to attend the 2014 AAP Spring Conference. Media representatives must be currently employed by an established news outlet and must provide appropriate identification before being issued a press pass.

For more information or to obtain an application for press credentials, contact the Academy’s Public Affairs Department at 312-573-3243 or

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Thursday, March 06, 2014

Byproducts of bacteria-causing gum disease incite oral cancer growth, study shows

X. Yu, A.-M. Shahir, J. Sha, Z. Feng, B. Eapen, S. Nithianantham, B. Das, J. Karn, A. Weinberg, N. F. Bissada, F. Ye. Short Chain Fatty Acids From Periodontal Pathogens Suppress HDACs, EZH2, and SUV39H1 to Promote Kaposi's Sarcoma-Associated Herpesvirus Replication. Journal of Virology, 2014; DOI: 10.1128/JVI.03326-13

Researchers from Case Western Reserve University have discovered how byproducts in the form of small fatty acids from two bacteria prevalent in gum disease incite the growth of deadly Kaposi's sarcoma-related (KS) lesions and tumors in the mouth.

The discovery could lead to early saliva testing for the bacteria, which, if found, could be treated and monitored for signs of cancer and before it develops into a malignancy, researchers say.
"These new findings provide one of the first looks at how the periodontal bacteria create a unique microenvironment in the oral cavity that contributes to the replication the Kaposi's sarcoma Herpesvirus (KSHV) and development of KS," said Fengchun Ye, the study's lead investigator from Case Western Reserve School of Dental Medicine's Department of Biological Sciences.
The discovery is described in The Journal of Virology article, "Short Chain Fatty Acids from Periodontal Pathogens Suppress HDACs, EZH2, and SUV39H1 to Promote Kaposi's Sarcoma-Associated Herpesvirus Replication."
The research focuses on how the bacteria, Porphyromonas gingivalis (Pg) and Fusobacterium nucleatum (Fn), which are associated with gum disease, contribute to cancer formation.
Ye said high levels of these bacteria are found in the saliva of people with periodontal disease, and at lower levels in those with good oral health -- further evidence of the link between oral and overall physical health.
KS impacts a significant number of people with HIV, whose immune systems lack the ability to fight off the herpesvirus and other infections, he said.
"These individual are susceptible to the cancer," Ye said.
KS first appears as lesions on the surface of the mouth that, if not removed, can grow into malignant tumors. Survival rates are higher when detected and treated early in the lesion state than when a malignancy develops.
Also at risk are people with compromised immune systems: people on medications to suppress rejection of transplants, cancer patients on chemotherapies and the elderly population whose immune systems naturally weaken with age.
The researchers wanted to learn why most people never develop this form of cancer and what it is that protects them.
The researchers recruited 21 patients, dividing them into two groups. All participants were given standard gum-disease tests.
The first group of 11 participants had an average age of 50 and had severe chronic gum disease. The second group of 10 participants, whose average age was about 26, had healthy gums, practiced good oral health and showed no signs of bleeding or tooth loss from periodontal disease.
The researchers also studied a saliva sample from each. Part of the saliva sample was separated into its components using a spinning centrifuge. The remaining saliva was used for DNA testing to track and identify bacteria present, and at what levels.
The researchers were interested in Pg's and Fn's byproducts of lipopolysaccharide, fimbriae, proteinases and at least five different short-chain fatty acids (SCFA): butyric acid, isobutryic acid, isovaleric acid, propionic acid and acetic acid.
After initially testing the byproducts, the researchers suspected that the fatty acids were involved in replicating KSHV. The researchers cleansed the fatty acids and then introduced them to cells with quiescent KSHV virus in a petri dish for monitoring the virus' reaction.
After introducing SCFA, the virus began to replicate. But the researchers saw that, while the fatty acids allowed the virus to multiple, the process also set in motion a cascade of actions that also inhibited molecules in the body's immune system from stopping the growth of KSHV.
"The most important thing to come out of this study is that we believe periodontal disease is a risk factor for Kaposi sarcoma tumor in HIV patients," Ye said.
With that knowledge, Ye said those with HIV must be informed about the importance of good oral health and the possible consequences of overlooking that area.

Introducing 3M™ True Definition Software 4.2

Latest version of 3M True Definition Software continues to advance the overall scanning experience

ST. PAUL, Minn. – (March 5, 2014) – 3M ESPE continues to advance the overall scanning experience of the 3M True Definition Scanner with its latest 4.2 software upgrade. This upgrade improves the ease of rotation when scanning over incisal edges and streamlines the installation process for chairside connections. The 3M True Definition Scanner allows dentists the flexibility to practice the way they want, using the digital workflows that they choose. This one device gives dentists unlimited options, with access to the broadest array of Open and Trusted Connections.

The upgrade will be available to all 3M True Definition Scanners and is another example of 3M’s commitment to continuously improve the user experience and offer the greatest value possible with its affordable monthly data plans.

“The newest software update for the 3M True Definition Scanner has definitely reduced the time it takes to complete a scan,” said Dr. Joseph Fox of Fox Family Dental in Sun City, Ariz.

“Our customers are pleased to see 3M providing continuous technology improvements without additional upgrade costs,” said David Frazee, VP and GM of 3M Digital Oral Care. “With 3M’s model, it is easy to get started now with something that is proven, and still be well positioned for future improvements.” 

The 3M True Definition Scanner continues to be more accurate—and more consistently accurate—than leading systems on the market¹. The outstanding accuracy leads to reduced seating times and has been clinically proven in thousands of cases in the past 12 months, with a fit rate of 99.7%2

For more information about the 3M True Definition Scanner, visit

Wednesday, March 05, 2014

Impact of digital impression techniques on the adaption of ceramic partial crowns in vitro

Available online 6 February 2014



To investigate the effects digital impression procedures can have on the three-dimensional fit of ceramic partial crowns in vitro.


An acrylic model of a mandibular first molar was prepared to receive a partial coverage all-ceramic crown (mesio-occlusal-distal inlay preparation with reduction of all cusps and rounded shoulder finish line of buccal wall). Digital impressions were taken using iTero (ITE), cara TRIOS (TRI), CEREC AC with Bluecam (CBC), and Lava COS (COS) systems, before restorations were designed and machined from lithium disilicate blanks. Both the preparation and the restorations were digitized using an optical reference-scanner. Data were entered into quality inspection software, which superimposed the records (best-fit-algorithm), calculated fit-discrepancies for every pixel, and colour-coded the results to aid visualization. Furthermore, mean quadratic deviations (RMS) were computed and analysed statistically with a 1-way ANOVA. Scheffé’s procedure was applied for multiple comparisons (n = 5, α=0.05).


Mean marginal (internal) discrepancies were: ITE 90 (92) μm, TRI 128 (106) μm, CBC 146 (84) μm, and COS 109 (93) μm. Differences among impression systems were statistically significant at p < 0.001 (p = 0.039). Qualitatively, partial crowns were undersized especially around cusp tips or the occluso-approximal isthmus. By contrast, potential high-spots could be detected along the preparation finishline and at central occlusal boxes.


Marginal and internal fit of milled lithium disilicate partial crowns depended on the employed digital impression technique.
Clinical Significance. The investigated digital impression procedures demonstrated significant fit discrepancies. However, all fabricated restorations showed acceptable marginal and int

Tuesday, March 04, 2014

Effect of cariogenic challenge on the stability of dentin bonds

J. Appl. Oral Sci. vol.22 no.1 Bauru Jan./Feb. 2014 

The oral environment is subject to biofilm accumulation and cariogenic challenge, and few studies exist on the effect of these factors on the bond strength of adhesive systems. The aim of this study was to test if the exposure of adhesive interfaces to cariogenic challenge under biofilm accumulation could promote higher degradation than the exposure to biofilm accumulation alone.

Material And Methods:
Five molars were ground until exposure of medium dentin and then restored (Single Bond 2 and Z250 3M ESPE). The tooth/resin sets were cut to obtain beam-shaped specimens, which were distributed according to the aging conditions (n=20): water for 24 h (control); biofilm under cariogenic challenge for 3, 5 or 10 days; biofilm without cariogenic challenge for 10 days; and water for 3 months. Microcosm biofilms were formed from human saliva and grown in a saliva analogue medium, supplemented or not with sucrose to promote cariogenic challenge. Specimens were tested for microtensile bond strength, and failure modes were classified using light microscopy. Bond strength data were analyzed using ANOVA and failure modes were analyzed using ANOVA on ranks (α=0.05).

No significant differences in bond strength were detected among the aging methods (P=0.248). The aging period was associated with an increase in the frequency of adhesive failures for the groups aged for 10 days or longer (P<0 .001="" p="">

Aging leads to a higher prevalence of interfacial adhesive failures, although this effect is not associated with cariogenic challenge or reduction in bond strengths.

Monday, March 03, 2014

Another piece to the Chartless/Paperless Dental Office

We have been doing the scan and shred technique for patient intake forms since we went chartless many years ago. There have been solutions to filling out forms online but none seemed to be the right fit. We have been struggling to get to the next step due to some limitations and have had things setup for a while but just never set a start date, mostly because we are comfortable in what we were doing. We needed to break through to the next level.

One problem was that we would need multiple tablet computers and everyone agreed that typing on a tablet is not easy when having to fill out multi page forms.  So instead of spending lots of money on iPads (which we did beta test),

 I decided to try a Google Chromebook. A Chromebook runs Googles Chrome OS. If any of you use Chrome as your browser you will be right at home. The Chromebook connects to the Internet via WiFi and looks and feels like a very lightweight laptop computer with a keyboard.
The Chromebook cost me under $200 on sale and I can deploy two of them for the price of an iPad along with the convenience of a keyboard. Looking forward to reducing the paper use along with time spent shredding!