Saturday, August 31, 2013

Timing for Composite Resin Placement on Mineral Trioxide Aggregate

Journal of Endodontics
Volume 39, Issue 9 , Pages 1167-1170, September 2013

Abstract 

Introduction

The aim of this study was to investigate the proper time to restore composite resin over mineral trioxide aggregate (MTA).

Methods

Thirty-five samples of MTA blocks were divided into 7 groups with 3 different times (10 minutes, 1 day, and 7 days) selected for restoring the composite resin over MTA with and without bonding resin, and a control group was included for comparison. After 21 days, the distances between MTA and the composite resin or between MTA and the bonding agent on sectioned planes along the long axis were measured using a scanning electron microscope (×2,000 magnification). The hardness of the MTA near the composite resin was presented as the Vickers microhardness.

Results

There were no gaps at the interface in the 10-minute groups, the 1-day group with a bonding agent, and the 7-day group with a bonding agent. The groups without a bonding agent at 1 and 7 days presented a separation or gap at the interface. The value of the Vickers microhardness in the 1-day groups was significantly decreased compared with those of the other groups regardless of the presence or absence of a bonding agent.

Conclusions

These findings suggest that composite resin with a bonding agent over MTA can be restored almost immediately after MTA mixing during a single visit.

Thursday, August 29, 2013

More Parents Report Healthy Tooth Brushing Habits After First Year of Ad Council Children’s Oral Health Campaign


New Survey Reveals that More Parents Report Their Children
Brushing Their Teeth for Two Minutes, Twice a Day

New York, NY, August 29, 2013— On the one-year anniversary of their Kids’ Healthy Mouths campaign, the Ad Council and the Partnership for Healthy Mouths, Healthy Lives are pleased to announce results from a new study* that demonstrate substantial progress in the effort to improve children’s oral health habits. The survey, administered to English and Spanish-speaking parents, indicates that more parents report regularly monitoring and maintaining their child’s oral health; subsequently, more children are regularly brushing.

Since the Kids’ Healthy Mouths campaign launched in August 2012, it has received tremendous media exposure through widespread TV, radio, print, outdoor and digital Public Service Advertisements (PSAs) in both English and Spanish. The campaign has been embraced by media outlets throughout the country, which have donated more than $33 million in free ad time and space. The PSAs aim to reduce the prevalence of dental decay by motivating parents to promote good oral health habits with their kids by reminding them to brush two minutes, twice a day to avoid oral pain in the future.

According to the study administered by the Ad Council:

·         More than 50 percent of parents surveyed have seen or heard the new Kids’ Healthy Mouths PSAs.
·         Significantly more parents in 2013 report that their child brushes at least twice a day compared to before the campaign launched (55 percent of English-speaking parents in 2013, up from 48 percent in 2012, and 77 percent of Spanish-speaking parents in 2013, up from 69 percent in 2012).
·         Parents in 2013 were also more likely to report their child brushes for at least two minutes each time (64 percent of English-speaking parents in 2013, up from 60 percent in 2012, and 77 percent of Spanish-speaking parents in 2013, up from 69 percent in 2012).
·         An increased number of English and Spanish-speaking parents report being “good” or “very good” at making sure their child brushes at least twice a day (65 percent of English-speaking parents in 2013, up from 60 percent in 2012, and 77 percent of Spanish-speaking parents in 2013, up from 73 percent in 2012) for two minutes each time (58 percent of English-speaking parents in 2013, up from 53 percent in 2012, and 79 percent of Spanish-speaking parents in 2013, up from 75 percent in 2012).

Dental decay is currently the most common chronic childhood disease in the United States, affecting 16.5 million children. Oral disease disproportionately affects children from low-income families, who have nearly double the number of cases of untreated dental decay as the general public.

“We are extremely pleased with these results and with the overall impact of our campaign. Many dental problems can be avoided through simple changes in routines, and we’re seeing now how receptive Americans are to this message,” said Gary Price, Secretary and CEO of the Dental Trade Alliance Foundation. “Through our collective efforts together with the Ad Council, we have become the foremost voice on the issue of improving children’s oral health nationwide.”

“These are some of the strongest survey results we’ve seen after only one year of a campaign. This is the first campaign in the Ad Council's 71-year history to address oral health, and we are proud to be part of such an important effort to improve the lives of millions of parents and children,” said Peggy Conlon, President and CEO of the Ad Council.

Since the campaign launch, there have been more than 1.3 million visitors to the campaign website, 2min2x.org, which offers a collection of free, two-minute videos — featuring notable characters from children’s shows and networks, including Sesame Street and Cartoon Network— that kids can watch while brushing. The campaign has also benefited from tremendous press coverage, partnerships with influential parent-focused websites, endorsements from celebrity moms and strong support from the dental community.

The campaign has gone further in recent months — offering children’s oral health tips to parents on their cell phones via SMS messages. Parents can subscribe by texting “BRUSH” to 30364 or by visiting the homepage of 2min2x.org. In the upcoming months, the campaign will launch a new mobile game app for kids and their parents and a new national in-school oral health education program that aims to reach lower income and minority children and their families. English and Spanish language brochures will also be distributed to dental offices this fall. All of the multimedia PSAs were created pro bono by ad agencies Grey Group and Wing in New York.

Partnership for Healthy Mouths, Healthy Lives
The Partnership for Healthy Mouths, Healthy Lives is a coalition of the leading organizations in the field of oral health. The Partnership is committed to improve children’s oral health so that they can develop into healthy, productive adults. The Coalition shares the view that no child should be in pain and suffer broader health issues or endure the social stigma and lack of opportunity resulting from untreated dental diseases and conditions. The Coalition’s primary mission is to teach parents and caregivers, as well as the children themselves, to take control of their own health through oral disease prevention.

Members of the Partnership include: Academy of General Dentistry, Alliance of the American Dental Association, American Academy of Oral and Maxillofacial Pathology, American Academy of Pediatric Dentistry, American Academy of Pediatrics, American Academy of Periodontology, American Association for Dental Research, American Association of Endodontists, American Association of Oral and Maxillofacial Surgeons, American Association of Orthodontists, American Association of Public Health Dentistry, American Association of Women Dentists, American College of Prosthodontists, American Dental Assistants Association, American Dental Association, American Dental Education Association, American Dental Hygienists’ Association, America’s Dentists Care Foundation, Association of State & Territorial Dental Directors, California Dental Association, Children’s Dental Health Project, Connecticut Coalition for Oral Health, Connecticut State Dental Association, Dental Trade Alliance Foundation, DentaQuest Foundation, Hispanic Dental Association, Maine Dental Access Coalition, Medicaid/SCHIP Dental Association, National Association of Dental Laboratories, National Children’s Oral Health Foundation, National Dental Association, National Network for Oral Health Access, Oral Health America, Organization for Safety, Asepsis and Prevention, Santa Fe Group,the Society of American Indian Dentists and Washington State Dental Association.

Ad Council
The Ad Council is a private, non-profit organization with a rich history of marshaling volunteer talent from the advertising and media industries to deliver critical messages to the American public. Having produced literally thousands of PSA campaigns addressing the most pressing social issues of the day, the Ad Council has affected, and continues to affect, tremendous positive change by raising awareness, inspiring action and saving lives. To learn more about the Ad Council and its campaigns, visit www.adcouncil.org, like us on Facebook, follow us on Twitter or view our PSAs on YouTube.

Abstract Objectives This study reported the results at 5 years of fixed-fixed all-ceramic bridges, constructed in a yttria oxide stabilized tetragonal zirconium oxide polycrystal (Y-TZP) substructure, placed in adult patients in UK general dental practices. Materials and methods Four UK general dental practitioners recruited patients who required fixed bridgework and, after obtaining informed written consent, appropriate clinical and radiographic assessments were completed. The teeth were prepared and bridges constructed in accordance with the manufacturer's instructions. Each bridge was reviewed annually within 3 months of the anniversary of its placement by a calibrated examiner, together with the clinician who had placed the restoration, using modified USPHS criteria. Results Of the 41 bridges originally placed, 33 bridges were examined at 5 years. All Y-TZP frameworks were intact and no bridge retainers had debonded. Eight chipping fractures in the veneering ceramic were noted over the 5-year period. In five cases the patients were unaware of these and these cases were polished. Of the remaining three cases, in one a repair was attempted but was unsuccessful, but the bridge remained in satisfactory service. However, in the case involving a chipping fracture of the mesial–incisal angle of a central incisor, it was considered that replacement of the bridge was necessary. Conclusion 97% (n = 32) of the 33 Lava Y-TZP fixed-fixed bridges, evaluated in patients attending UK general dental practices, were found to be performing satisfactorily.

Available online 15 August 2013


Abstract

Objectives

This study reported the results at 5 years of fixed-fixed all-ceramic bridges, constructed in a yttria oxide stabilized tetragonal zirconium oxide polycrystal (Y-TZP) substructure, placed in adult patients in UK general dental practices.

Materials and methods

Four UK general dental practitioners recruited patients who required fixed bridgework and, after obtaining informed written consent, appropriate clinical and radiographic assessments were completed. The teeth were prepared and bridges constructed in accordance with the manufacturer's instructions. Each bridge was reviewed annually within 3 months of the anniversary of its placement by a calibrated examiner, together with the clinician who had placed the restoration, using modified USPHS criteria.

Results

Of the 41 bridges originally placed, 33 bridges were examined at 5 years. All Y-TZP frameworks were intact and no bridge retainers had debonded. Eight chipping fractures in the veneering ceramic were noted over the 5-year period. In five cases the patients were unaware of these and these cases were polished. Of the remaining three cases, in one a repair was attempted but was unsuccessful, but the bridge remained in satisfactory service. However, in the case involving a chipping fracture of the mesial–incisal angle of a central incisor, it was considered that replacement of the bridge was necessary.

Conclusion

97% (n = 32) of the 33 Lava Y-TZP fixed-fixed bridges, evaluated in patients attending UK general dental practices, were found to be performing satisfactorily.


Wednesday, August 28, 2013

Ritter Dental USA Takes Innovation, Education and Fundraising on the Road


The 125-City “Ritter Road Show” Kicks Off in September and Continues for National 15-Month Tour

San Antonio, TX – August 22, 2013 – Ritter Dental USA, a leading dental equipment manufacturer with a 125-year legacy of innovation, quality and reliability recently announced its plans to launch the Ritter Road Show, a dental exhibit scheduled to visit 125 cities throughout the United States.
According to Ritter Dental USA’s CEO Fred Battah, “It’s not every day that a dental company celebrates a 125 year anniversary. We’re going on the road to celebrate the past, and share our vision of the exciting future of Ritter Dental USA.”
Each Ritter Road Show event will be hosted at a local venue, and will include three basic components; innovation, education and fundraising.
Innovation:
The latest Ritter innovations will be showcased in a dedicated display area at each Ritter Road Show event and will include:
      The Superior and The Excellence Dental Units – Made in Germany and recently-introduced in the U.S.; these dental units represent the perfect balance of technology and comfort, while still being price-sensitive for today’s economy.
      The Ritter Implant System  Precision and price-designed to meet the standards of the most experienced implantologist. Made in Germany using Grade 5 titanium.

      Digital Abutment and Crown System – Powered by 3Shape and putting digital impressions and CAD/CAM technology within reach of every dentist.

      Ritter Instruments - Forged from German steel, the Ritter instrument line offers quality and precision for general practitioners, specialists and hygienists.

·       Dentist-Direct Zero %, In-House Financing - For qualified buyers. 

“We’re making a very strong effort to show the latest Ritter innovations to dentists who may not have an opportunity to attend the big dental meetings,” says Battah.  “We’re taking our trade show booth to you!”
Education:
Education will consist of two optional, but essential courses authorized by the American Heart Association that are required for every member of the dental team:
·       Basic Life Support Health Care Provider CPR & AED Course
·       Bloodborne Pathogen Safety Course

“The best price we’ve seen for both of these courses is $80.00,” explains Battah. “Our discounted tuition is only $40.00 per person. We’re keeping $20.00 just to cover our cost for the course materials, and donating the remaining $20.00 to local dental societies for their local charitable programs. Dental professionals can direct their donations to their local societies during the online registration process.
For every dental professional who pays the $40.00 tuition fee for the CPR/AED and blood borne pathogen safety courses,” adds Battah. “Ritter will give a $40.00 product voucher – Making the courses virtually free!”
The Ritter Road Show will also include training for dental equipment technicians which is mandatory to become authorized Ritter Dental Technicians. “It’s all part of our goal to expand our dealer network to better serve the Ritter customer base on a local level,” says Battah.
Fundraising:
Ritter’s fundraising efforts will be directed towards local dental societies located in the 125 Ritter Road Show destination cities. For every local dental society member who pays the $40.00 tuition fee for the CPR/AED and bloodborne pathogen safety courses, $20.00 will be donated to their local society to fund local charitable programs.
According to Battah “This is a targeted, grass roots approach to fundraising. Our preliminary discussions with local dental societies have been extremely positive.”
For more details about the Ritter Road Show, including dates, locations and registration, visit www.RitterRoadShow.com. For company and product information, visit www.RitterDentalUSA.com or call toll-free 855-807-8111.
About Ritter Dental USA
Based in San Antonio, Texas, Ritter Dental USA is the sister company of Ritter Concept GmbH, which is headquartered in Germany and designs and manufactures, world-class dental equipment that includes treatment chairs, stools, operatory lights, autoclaves, compression/suction units, instruments, radiography equipment, intraoral cameras and implants. For more details visit www.RitterDentalUSA.com. Follow us on Facebook, Twitter, LinkedIn, YouTube and Google+.
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Tuesday, August 27, 2013

DentalEZ® Group Teams Up with Henry Schein® Dental to Offer Nationwide Oral Cancer Seminars

 
Participants will Receive 4 CE Credits for Attending Half-Day Conferences Presented by Top Industry Experts Dr. Dennis Abbott and Dr. John Tucker

Malvern, PA (August 22, 2013) – DentalEZ® Group, a supplier of innovative products and services for dental health professionals worldwide, is pleased to sponsor a number of upcoming oral cancer seminars.  Hosted by Henry Schein, the nationwide seminars will take place through the remainder of 2013 and features world renowned experts, Dr. Dennis Abbot and Dr. John Tucker, who will discuss this very timely subject and provide dental professionals with the tips and tools needed to incorporate oral cancer screening into their daily practice.

Areas of discussion will provide participants with a comprehensive and well-structured learning experience that will focus on four main topics:

·       The changing target population for oral cancer
·       How to conduct a complete, thorough examination and accurately record findings
·       New detection tools
·       Patient discussions: results and referral procedure

Participants will learn:

·       Four key motivating factors to fully engage an oral cancer screening system into daily practice
·       How to develop a mission statement for oral cancer screening in the practice
·       Key statistics for oral cancer – past and present
·       How to identify the changing target population for oral cancer screening examinations
·       The proper steps for a complete oral cancer screening
·       The why and how of new tools available to enhance the oral cancer screening process
·       How to create seamless referrals and follow-up
·       Communication skills for informed consent to perform oral cancer screenings, the examination itself, delivering the difficult message of a positive finding, and creating urgency for effective patient follow-through
·       And much, much more!

The schedule of oral cancer seminars with Dr. Abbott and Dr. Tucker is as follows:

ü  Sept. 18th in Denver, CO with Dr. Abbott
ü  Oct. 18th in Seattle, WA with Dr. Tucker
ü  Oct. 18th in Tulsa, OK with Dr. Abbott
ü  Oct. 30th in Louisville, KY with Dr. Abbott
ü  Nov. 1st in Boston, MA with Dr. Tucker
ü  Nov. 6th in Pleasanton, CA with Dr. Abbott
ü  Nov. 15th in Raleigh, NC with Dr. Abbott
ü  Dec. 13th in Sandy, UT with Dr. Abbott

For more information or to register, please go to www.henryscheineventconnect.com, or email CESeminars@henryschein.com. 

Monday, August 26, 2013

nterventions for replacing missing teeth: antibiotics at dental implant placement to prevent complications.

Cochrane Database Syst Rev. 2013 Jul 31;7:CD004152. doi: 10.1002/14651858.CD004152.pub4.

Abstract

BACKGROUND:

Some dental implant failures may be due to bacterial contamination at implant insertion. Infections around biomaterials are difficult to treat, and almost all infected implants have to be removed. In general, antibiotic prophylaxis in surgery is only indicated for patients at risk of infectious endocarditis; with reduced host-response; when surgery is performed in infected sites; in cases of extensive and prolonged surgical interventions; and when large foreign materials are implanted. A variety of prophylactic systemic antibiotic regimens have been suggested to minimise infections after dental implant placement. More recent protocols recommended short-term prophylaxis, if antibiotics have to be used. Adverse events may occur with the administration of antibiotics, and can range from diarrhoea to life-threatening allergic reactions. Another major concern associated with the widespread use of antibiotics is the selection of antibiotic-resistant bacteria. The use of prophylactic antibiotics in implant dentistry is controversial.

OBJECTIVES:

To assess the beneficial or harmful effects of systemic prophylactic antibiotics at dental implant placement versus no antibiotic or placebo administration and, if antibiotics are beneficial, to determine which type, dosage and duration is the most effective.

SEARCH METHODS:

We searched the Cochrane Oral Health Group's Trials Register (to 17 June 2013), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2013, Issue 5), MEDLINE via OVID (1946 to 17 June 2013) and EMBASE via OVID (1980 to 17 June 2013). There were no language or date restrictions placed on the searches of the electronic databases.

SELECTION CRITERIA:

Randomised controlled clinical trials (RCTs) with a follow-up of at least three months, that compared the administration of various prophylactic antibiotic regimens versus no antibiotics to people undergoing dental implant placement. Outcome measures included prosthesis failures, implant failures, postoperative infections and adverse events (gastrointestinal, hypersensitivity, etc).

DATA COLLECTION AND ANALYSIS:

Screening of eligible studies, assessment of the risk of bias of the trials and data extraction were conducted in duplicate and independently by two review authors. Results were expressed as risk ratios (RRs) using a random-effects model for dichotomous outcomes with 95% confidence intervals (CIs). Heterogeneity, including both clinical and methodological factors, was to be investigated.

MAIN RESULTS:

Six RCTs with 1162 participants were included: three trials compared 2 g of preoperative amoxicillin versus placebo (927 participants), one compared 3 g of preoperative amoxicillin versus placebo (55 participants), one compared 1 g of preoperative amoxicillin plus 500 mg four times a day for two days versus no antibiotics (80 participants), and one compared four groups: (1) 2 g of preoperative amoxicillin; (2) 2 g of preoperative amoxicillin plus 1 g twice a day for seven days; (3) 1 g of postoperative amoxicillin twice a day for seven days, and (4) no antibiotics (100 participants). The overall body of evidence was considered to be of moderate quality. The meta-analyses of the six trials showed a statistically significant higher number of participants experiencing implant failures in the group not receiving antibiotics (RR 0.33; 95% CI 0.16 to 0.67, P value 0.002, heterogeneity: Tau(2) 0.00; Chi(2) 2.87, df = 5 (P value 0.57); I(2) 0%). The number needed to treat for one additional beneficial outcome (NNTB) to prevent one person having an implant failure is 25 (95% CI 14 to 100), based on an implant failure rate of 6% in participants not receiving antibiotics. There was borderline statistical significance for prosthesis failures (RR 0.44; 95% CI 0.19 to 1.00), with no statistically significant differences for infections (RR 0.69; 95% CI 0.36 to 1.35), or adverse events (RR 1; 95% CI 0.06 to 15.85) (only two minor adverse events were recorded, one in the placebo group). No conclusive information can be derived from the only trial that compared three different durations of antibiotic prophylaxis since no event (implant/prosthesis failures, infections or adverse events) occurred in any of the 25 participants included in each study group. There were no trials that evaluated different antibiotics or different antibiotic dosages.

AUTHORS' CONCLUSIONS:

Scientific evidence suggests that, in general, antibiotics are beneficial for reducing failure of dental implants placed in ordinary conditions. Specifically 2 g or 3 g of amoxicillin given orally, as a single administration, one hour preoperatively significantly reduces failure of dental implants. No significant adverse events were reported. It might be sensible to suggest the use of a single dose of 2 g prophylactic amoxicillin prior to dental implant placement. It is still unknown whether postoperative antibiotics are beneficial, and which antibiotic is the most effective.

Saturday, August 24, 2013

Laser welding method for removal of instruments debris from root canals.

The Bulletin of Tokyo Dental College - August 2, 2013

Abstract

The purpose of this study was to clarify the viability of a novel method for removing debris from broken instruments from root canals using a laser apparatus. Laser welding was performed on stainless steel or nickel titanium files using an Nd:YAG laser. Retention force between the files and extractors was measured. Increase in temperature on the root surface during laser irradiation was recorded and the irradiated areas evaluated with a scanning electron microscope. Retention force on stainless steel was significantly greater than that on nickel titanium. The maximum temperature increase was 4.1°C. The temperature increase on the root surface was greater in the vicinity of the welded area than that at the apical area. Scanning electron microscopy revealed that the files and extractors were welded together. These results indicate that the laser welding method is effective in removing debris from broken instruments from root canals.

Friday, August 23, 2013

3M Gives Dentists New Options for Same-Day Crowns


3M™ True Definition Scanner and TS150™ In-Office Milling Solution from IOS Technologies create great-fitting crowns in one visit

ST. PAUL, Minn. – (August 15, 2013) – 3M ESPE announces the 3M True Definition Scanner’s newest Trusted Connection, the IOS Technologies’ TS150™ In-Office Milling Solution. The addition of the new milling system is just the latest example of how the 3M True Definition Scanner enables dentists to expand their options putting CAD/CAM dentistry within reach of any practice.
With the 3M True Definition Scanner and the TS150 System featuring FastDesign™ Software, dentists have a simple, convenient and affordable solution for same-day dentistry. The dentist quickly captures a digital impression on the 3M™ True Definition Scanner, which is more accurate—and more consistently accurate—than leading systems on the market¹, and sends it to the FastDesign™ CAD station for the design of the dental restoration. By leveraging Glidewell Laboratories’ extensive dental anatomy library, the software creates a  highly accurate crown proposal and guides the user through the rest of the design process. Once complete, the design is sent to the TS150™ mill—a powerful air-driven unit that features a 150,000-RPM spindle and an orbital mill path that prevents the burr from crossing over the margin, ensuring excellent marginal integrity for better fitting restorations. In addition, the TS150 mill is approved for Lava™ Ultimate Restorative, 3M ESPE’s unique resin nano ceramic material that delivers strength and esthetics with a fast, no firing process.
3M has worked closely with IOS Technologies, a wholly owned subsidiary of Glidewell Laboratories, to test and validate the seamless integration of the 3M True Definition Scanner with the TS150 In-Office Milling Solution. Access to this Trusted Connection is available to subscribers of 3M’s Advanced Data Plan.
 “This new Trusted Connection combines the 3M True Definition Scanner’s unprecedented quality and affordability with the intuitive and easy-to-learn CAD/CAM system from IOS Technologies, making it easier for dentists to create beautiful and strong dental restorations with 3M ESPE’s Lava Ultimate Restorative.” said David Frazee, vice president and general manager of 3M Digital Oral Care. “In the midst of this fast-paced digitization of dentistry, 3M expects to be the leader in rapidly delivering new and affordable connections for dentists and labs alike.”
The TS150 In-Office Milling Solution and Lava Ultimate Restorative for the TS150 will be sold through Burkhart Dental Supply and Benco Dental.
For more information about the 3M True Definition Scanner, visit www.3M.com/TrueDef/TS150.

Thursday, August 22, 2013

Think before you drink: Erosion of tooth enamel from soda pop is permanent

You may be saving calories by drinking diet soda, but when it comes to enamel erosion of your teeth, it's no better than regular soda.
In the last 25 years, Kim McFarland, D.D.S., associate professor in the University of Nebraska Medical Center College of Dentistry in Lincoln, has seen an increase in the number of dental patients with erosion of the tooth enamel - the protective layer of the tooth. Once erosion occurs, it can't be reversed and affects people their whole life.
"I'd see erosion once in a while 25 years ago but I see much more prevalence nowadays," Dr. McFarland said. "A lot of young people drink massive quantities of soda. It's no surprise we're seeing more sensitivity."
Triggers like hot and cold drinks - and even cold air - reach the tooth's nerve and cause pain. Depending on the frequency and amount of soda consumed, the erosion process can be extreme.
She said according to the National Soft Drink Association, it's estimated the average American drinks 44 gallons of soda pop a year. Phosphoric and citric acid, which are common ingredients in many popular sodas and diet sodas, alters the pH balance in the mouth and can cause tooth erosion over time.
"It can be more harmful than cavities because the damage causes tooth sensitivity," Dr. McFarland said. "If a tooth is decayed a dentist can fix it by placing a filling, but if a tooth is sensitive there is really nothing a dentist can do.
"Tooth sensitivity can become a lifetime problem, limiting things we like to drink and even food choices. You could crown all your teeth but that is costly and a rather extreme solution," Dr. McFarland said.
"It hurts to consume cold and hot foods and beverages. Some of my patients tell me when they go outside in the winter they don't open their mouth or the cold air causes pain."
In addition, a significant number of scientific studies show a relationship between the consumption of soda and enamel erosion and cavities.
Dr. McFarland said it's best not to drink soda at all, but she offers tips for those who continue to drink it.
  • Limit consumption of soda to meal time
  • Don't drink soda throughout the day
  • Brush your teeth afterwards -- toothpaste re-mineralizes or strengthens areas where acid weakened the teeth
  • If tooth brushing is not possible, at least rinse out your mouth with water
  • Chew sugar free gum or better yet, gum containing Xylitol.
University of Nebraska Medical Center. "Think before you drink: Erosion of tooth enamel from soda pop is permanent." Medical News Today. MediLexicon, Intl., 24 Jul. 2013. Web.
28 Jul. 2013.

Wednesday, August 21, 2013

Effect of short LED lamp exposure on wear resistance, residual monomer and degree of conversion for Filtek Z250 and Tetric EvoCeram composites

Dental Materials
Volume 29, Issue 8 , Pages 824-834, August 2013

Abstract 

Objectives

The latest LED dental curing devices claim sufficient curing of restorative materials with short curing times. This study evaluates mechanical and chemical properties as a function of curing time of two commercial composite filling materials cured with three different LED lamps.

Methods

The composites were Filtek Z250 (3M ESPE) and Tetric EvoCeram (Ivoclar Vivadent) and the LED curing devices were bluephase 16i (Ivoclar Vivadent), L.E.Demetron II (Kerr) and Mini L.E.D. (Satelec). Control samples were cured with a QTH-lamp (VCL 400, Kerr). The wear resistance after simulated tooth brushing, degree of conversion, curing depth, and amounts of residual monomers were measured after different curing times.

Results

The results of this study show that short curing time with high-intensity LEDs may influence the bulk properties of the materials, resulting in lower curing depth and increased residual monomer content. The measured surface properties of the materials, degree of conversion and wear resistance, were not affected by short curing times to the same extent.

Significance

This study demonstrates that reduced exposure time with high intensity LEDs can result in composite restorations with inferior curing depth and increased leaching of monomers. Dentists are recommended to use sufficient curing times even with high intensity LEDs to ensure adequate curing and minimize the risk of monomer leaching.

Tuesday, August 20, 2013

The Law Firm of Wohl & Fruchter LLP Announces Investigation of BIOLASE, Inc.

Just an FYI if you are looking to purchase a laser. MJ 
 
NEW YORK--(BUSINESS WIRE)--August 19, 2013-- 
The law firm of Wohl & Fruchter LLP is investigating possible violations of federal securities laws by officers and directors of BIOLASE, Inc. (Biolase) (NASDAQ: BIOL).
On August 7, 2013, after the close of the market, Biolase issued a press release announcing its financial and operating results for the second quarter ended June 30, 2013. In the release, the Company disclosed, among other things, that it "no longer expects to generate cash from operations overall for the year ending December 31, 2013," and that its cash balances as of June 30, 2013 totaled approximately $2.1 million.
Subsequently, in its Form 10-Q filed on August 9, 2013, the Company disclosed that, on August 5, 2013, the Company's lender, Comerica Bank (Comerica) waived the Company's noncompliance with the minimum EBITDA covenant in the agreement governing the Company's revolving credit facility with Comerica. However, in connection with the waiver, the Company's borrowing capacity under the facility was reduced from $10.0 million to $7.5 million, pending agreement with Comerica on amended covenants.
Upon the above and other negative news, BIOL shares declined over 53% over seven trading days, from a close of $3.42/share on August 7, 2013, to a close of $1.60/share on August 16, 2013.
Wohl & Fruchter's investigation concerns whether Biolase management has improperly concealed from investors, among other things, the severity of the Company's liquidity problems.
Persons with relevant information, and BIOL shareholders with questions about this investigation, are invited to contact the attorney below, or our Firm by calling 866.833.6245.
Additional information is available on our website at: http://www.wohlfruchter.com/cases/biol.
About Wohl & Fruchter
Wohl & Fruchter LLP represents plaintiffs in litigation arising from fraud and other fiduciary breaches by corporate managers, as well as other complex litigation matters. Please visit our website, www.wohlfruchter.com, to learn more about our Firm, or contact one of our partners.
This release may be deemed to constitute attorney advertising.
 
    CONTACT: Wohl & Fruchter LLP 
J. Elazar Fruchter, 845-425-4658
Toll Free 866-833-6245
jfruchter@wohlfruchter.com
www.wohlfruchter.com
 
    SOURCE: Wohl & Fruchter LLP 
Copyright Business Wire 2013 
 

Monday, August 19, 2013

Upcoming webinar on Reconstructing Broken Down Teeth

Join me on Wednesday for a webinar sponsored by Voco

Reconstructing Broken Down and Endodontically Treated Teeth
Presenter: Dr. Martin Jablow    CE Credits: 1 CEU
Webinar Begins:  8/21/13  8:15 PM ET,  5:15 PM PT
This CE webinar will guide you through the selection process for determining the proper materials and techniques for restoring coronally compromised teeth.

 http://vocolearning.com/

Saturday, August 17, 2013

Multifactorial risk assessment for survival of abutments of removable partial dentures based on practice-based longitudinal study

Available online 1 August 2013

Abstract

Objectives

Predicting the tooth survival is such a great challenge for evidence-based dentistry. To prevent further tooth loss of partially edentulous patients, estimation of individualized risk and benefit for each residual tooth is important to the clinical decision-making. While there are several reports indicating a risk of losing the abutment teeth of RPDs, there are no existing reports exploring the cause of abutment loss by multifactorial analysis. The aim of this practice-based longitudinal study was to determine the prognostic factors affecting the survival period of RPD abutments using a multifactorial risk assessment.

Methods

One hundred and forty-seven patients had been previously provided with a total of 236 new RPDs at the Osaka University Dental Hospital; the 856 abutments for these RPDs were analyzed. Survival of abutment teeth was estimated using the Kaplan–Meier method. Multivariate analysis was conducted by Cox's proportional hazard modelling.

Results

The 5-year survival rates were 86.6% for direct abutments and 93.1% for indirect abutments, compared with 95.8% survival in non-abutment teeth. The multivariate analysis showed that abutment survival was significantly associated with crown-root ratio (hazard ratio (HR): 3.13), root canal treatment (HR: 2.93), pocket depth (HR: 2.51), type of abutments (HR: 2.19) and occlusal support (HR: 1.90).

Conclusion

From this practice-based longitudinal study, we concluded that RPD abutment teeth are more likely to be lost than other residual teeth. From the multifactorial risk factor assessment, several prognostic factors, such as occlusal support, crown-root ratio, root canal treatment, and pocket depth were suggested.

Clinical significance

These results could be used to estimate the individualized risk for the residual teeth, to predict the prognosis of RPD abutments and to facilitate an evidence-based clinical decision making.

Friday, August 16, 2013

Determination of daytime clenching events in subjects with and without self-reported clenching.

Fujisawa, M., Kanemura, K., Tanabe, N., Gohdo, Y., Watanabe, A., Iizuka, T., Sato, M. and Ishibashi, K. (2013), Determination of daytime clenching events in subjects with and without self-reported clenching. Journal of Oral Rehabilitation. doi: 10.1111/joor.12087

Summary

To confirm the validity of self-awareness of daytime clenching, specific electromyogram (EMG) characteristics of clenching behaviour were determined using surface EMG recordings. Temporal muscle EMGs were recorded for 5 h in 13 subjects with self-reported clenching (clenching group: 27·5 ± 3·8 years old) and 12 subjects without self-reported clenching (control group: 28·6 ± 7·1 years old). All EMG data were recorded and stored on a portable EMG apparatus. The device was similar in size to a hearing aid, and suitable to record daytime EMG without restriction of daily activities. A clenching event was defined as muscle activity exceeding 10% of the maximum voluntary contraction. Furthermore, simultaneous voice recording was also performed to identify the corresponding EMG event as functional or parafunctional. The mean number of clenching events was 192·8 ± 228·8 and 24·8 ± 26·5 in the clenching and the control groups, respectively (P < 0·05, Mann–Whitney U-test); the number of functional events was not significantly different between the groups. Because there was a significant difference in the number of clenching events between the groups, self-reported daytime clenching is considered to be a reliable screening parameter for awake bruxism.

Thursday, August 15, 2013

Voco's Futurabond® U: Dual-cure Universal Adhesive

This new bonding agent will be available in September. MJ

The world’s first and only truly universal adhesive in a unit dose delivery system Futurabond® U:  Dual-cure Universal Adhesive


VOCO introduces Futurabond U, the world’s first and only true universal adhesive in a unit dose delivery system.  Futurabond U’s two main advantages as identified by VOCO are first its universal indications for all adhesive procedures without the need of any additional activators or primers and second Futurabond U’s ability to prevent solvent evaporation a well-documented challenge for adhesives dispensed in a bottle. 

Futurabond U’s versatility allows it to be used in self-, selective- or total etch mode without any additional primers or activators on virtually all substrates.  Futurabond U achieves total-etch bond strength levels with all light- self- and dual-cure resin based composites, cements and core build up materials. As a dual-cure adhesive Futurabond U will self-cure without any light activation which offers a big advantage for endodontic applications such as post cementation where it avoids the pooling effect, a problem with light cured adhesives. Futurabond U also adheres well to metal, zirconia and ceramic making extra primers unnecessary.

Futurabond U comes in a patented unit dose delivery system that prevents the solvent from evaporating. This ensures reliable and predictable results with each application. Thus the first bond will be as good as the last bond out of the box. VOCO states Futurabond U’s unit dose is priced the same as or less than the bottle systems of other brands.

Futurabond U needs only one coat and takes 35 second from start to finish. Its low film thickness of only 9 microns makes bonding margins invisible (i.e. no “halo” effect) and prevents pooling problems. Additionally the material does not need to be refrigerated.   

Further Futurabond U benefits include its indication as a desensitizer for use under amalgam restorations or on hypersensitive tooth necks, as a protective varnish for glass ionomers as well as an intraoral repair of ceramic restorations