Wednesday, January 17, 2018

Sports drink consumption and dental erosion among amateur runners.

J Oral Sci. 2017;59(4):639-643. doi: 10.2334/josnusd.16-0611.

Abstract

 This cross-sectional study assessed the prevalence and potential risk factors for dental erosion in amateur athletes at running events. After a sample calculation, 108 runners from the state of Rio de Janeiro, Brazil, were selected and examined for dental wear by a single trained and calibrated evaluator (kappa = 1.00). To identify risk factors, the runners were interviewed by using a standardized, semi-structured questionnaire. The average (SD) age of the runners was 34.2 (11.45), and the prevalence of dental erosion was 19.4%. Gastroesophageal reflux, running frequency per week, and time expended during competition were associated with dental erosion (P < 0.05). The association between use of isotonic drinks and dental erosion was not significant (P > 0.05). In conclusion, dental erosion was not associated with use of isotonic drinks. However, frequency of exercise per week and gastroesophageal reflux were risk factors for dental erosion.

Tuesday, January 16, 2018

Outcomes of Direct Pulp Capping by Using Either ProRoot Mineral Trioxide Aggregate or Biodentine in Permanent Teeth with Carious Pulp Exposure in 6- to 18-Year-Old Patients: A Randomized Controlled Trial

Journal of Endodontics

 

Abstract


Introduction

This study aimed to compare the success rates of direct pulp capping (DPC) by using either ProRoot Mineral Trioxide Aggregate (MTA) or Biodentine in the cariously exposed permanent teeth of 6- to 18-year-old patients. Gray discoloration was also evaluated.

Methods

Fifty-nine cariously exposed permanent teeth, including teeth with diagnosis of normal pulp, reversible pulpitis, or irreversible pulpitis, early periapical involvement, and exposure size of up to 2.5 mm, were included. Each patient with only 1 cariously exposed tooth was randomly allocated to DPC with either ProRoot MTA (n = 30) or Biodentine (n = 29). Patients were recalled every 6 months. Clinical and radiographic examinations were used to determine success.

Results

Fifty-five patients (mean age, 10 ± 2 years), 27 treated with ProRoot MTA and 28 with Biodentine, were included in the analysis. At mean follow-up of 18.9 ± 12.9 months, the success rate was 92.6% with ProRoot MTA and 96.4% with Biodentine (P > .05; difference, 4%; 95% confidence interval [CI], –8% to 16%). Biodentine was non-inferior to ProRoot MTA. Failures were distributed equally in all categories of pulpal diagnosis and occurred in teeth with no periapical involvement and small exposures (0.5 mm). The survival probabilities of DPC with ProRoot MTA and Biodentine were 0.92 (95% CI, 0.73–0.98) and 0.96 (95% CI, 0.80–0.99). No significant difference was observed between them (P > .05). Gray discoloration was observed only with ProRoot MTA (55%).

Conclusions

Biodentine was non-inferior to ProRoot MTA when used as a DPC material for cariously exposed permanent teeth of 6- to 18-year-old patients. However, Biodentine did not cause any gray discoloration in this study.

Monday, January 15, 2018

Reactions of human dental pulp cells to capping agents in the presence or absence of bacterial exposure.

J Oral Sci. 2017;59(4):621-627. doi: 10.2334/josnusd.16-0625.

Abstract

An ideal pulp-capping agent needs to have good biocompatibility and promote reparative dentinogenesis. Although the effects of capping agents on healthy pulp are known, limited data regarding their effects on bacterial contaminated pulp are available. This study aimed to evaluate the reaction of contaminated pulps to various capping agents to assist clinicians in making informed decisions. Human dental pulp (HDP) cell cultures were developed from extracted human molars. The cells were exposed to a bacterial cocktail comprising Porphyromonas gingivalis, Prevotella intermedia, and Streptococcus gordonii before being cocultured with capping agents such as mineral trioxide aggregate (MTA) Portland cement (PC), and Dycal. HDP cell proliferation was assayed by MTS colorimetric cell proliferation assay, and its differentiation was evaluated by real-time PCR for detecting alkaline phosphatase, dentin sialophosphoprotein, and osteocalcin expressions. MTA and PC had no apparent effect, whereas Dycal inhibited HDP cell proliferation. PC stimulated HDP cell differentiation, particularly when they were exposed to bacteria. MTA and Dycal inhibited differentiation, regardless of bacterial infection. In conclusion, PC was the most favorable agent, followed by MTA, and Dycal was the least favorable agent for supporting the functions of bacterial compromised pulp cells.

Friday, January 12, 2018

Bond strength of universal adhesives to air-abraded zirconia ceramics.

J Oral Sci. 2017;59(4):565-570. doi: 10.2334/josnusd.16-0666.

Abstract

The bond strength of universal adhesives to air-abraded zirconia ceramic was evaluated. Overall, 40 zirconia ceramic blocks with dimensions of 6 × 6 × 4 mm were cut from pre-sintered blanks. The sintered blocks were embedded in self-cured acrylic resin. The zirconia blocks were then randomly allocated to four groups (n = 10) in which different universal adhesives were used, except for the control group in which no universal adhesive was used. A silicon mold was used to build the resin cement. All specimens were stored in distilled water for 24 h at 37°C and mounted on a universal testing machine. They were then subjected to shear bond strength testing at a cross-speed of 0.5 mm/min until failure occurred. The failure modes were analyzed using a digital microscope at 50× magnification. Univariate one-way analysis of variance and Tukey's post-hoc test were used for statistical analysis. Compared with the control group, the groups with universal adhesives showed statistically significant differences (P < 0.05). In addition, there was no statistically significant difference in the bond strengths of the groups with universal adhesives (P > 0.05) . After 24 h of storage, the cementation bond to air-abraded zirconia ceramic was improved by the application of a universal adhesive.

Thursday, January 11, 2018

Cellerant Best of Class 2018

We are fast approaching the selection of the 2018 Cellerant Best of Class Award winners at the Chicago Midwinter Meeting at the end of February. Does your company have a product that is worthy of consideration? If so please feel free to reach out to me and we can see if it may meet the criteria necessary to win Best of Class or recognition as an emerging product.

The 2017 Winners are listed on the Cellerant Web Site.

Good Luck to all and see you all in Chicago!!!

Wednesday, January 10, 2018

New Dental Material Can Resist Biofilm Growth And Kills Bacteria

Researchers at the University of Pennsylvania have developed an antibacterial resin for dental procedures such as cavity fillings. They hope that the material can provide improved fillings that resist tooth decay and last longer.
Conventional materials for dental fillings are prone to being covered in plaque, a sticky biofilm that can lead to tooth decay and filling failure. Researchers at the University of Pennsylvania are working on developing something better. “Dental biomaterials such as these,” said Geelsu Hwang, a researcher involved in the study, “need to achieve two goals: first, they should kill pathogenic microbes effectively, and, second, they need to withstand severe mechanical stress, as happens when we bite and chew.”
Hwang and his colleagues have developed a new dental resin that contains the antimicrobial agent imidazolium. In a key development, the researchers chemically linked the antibacterial agent to the resin, so that it would not leach out into the oral cavity, but would only kill bacteria that come in contact with the resin. “This can reduce the likelihood of antimicrobial resistance,” said Hwang. This approach also means that the resin is unlikely to produce any toxicity in the mouth, but can still be effective at killing microbes on its surface.
The researchers tested the material’s ability to kill microbes and prevent the growth of biofilms, while also ensuring that it had the required mechanical strength to provide a durable filling. The material effectively killed bacteria that contacted it and permitted only small amounts of biofilm to grow on its surface.
When the team tested how much shear force was required to remove the biofilm from the material, they found that only a very small force was required to completely remove the sticky biofilm layer, whereas a force four times as strong could still not remove the biofilm from a control composite resin. “The force equivalent to taking a drink of water could easily remove the biofilm from this material,” said Hwang.
Study in Applied Materials & Interfaces: Nonleachable Imidazolium-Incorporated Composite for Disruption of Bacterial Clustering, Exopolysaccharide-Matrix Assembly, and Enhanced Biofilm Removal…

Tuesday, January 09, 2018

Britain's dental crisis: Charities that assist third world countries are forced to step in to cope with the 'national disaster' because dentists are too busy to properly treat patients


Britain's dental crisis is forcing charities that assist third world countries to step in.
Dentists in the UK are so inundated with targets and admin, they lack the time and resources to properly focus on dental health, resulting in a 'national disaster' that is making patient treatment a low priority, according to a letter signed by more than 400 dentists.
Described as 'an international disgrace', Dentaid, a charity which works across parts of Africa, Asia and Central America, set up its first UK scheme in West Yorkshire two years ago and provides free care to low-income patients.
The charity has since expanded its reach, with mobile services being set up in Hampshire, Cornwall and Buckinghamshire.  
Previous research reveals one in six areas in the UK have no dentists left taking NHS patients. 
Some 31 per cent of adults in the UK have tooth decay, which is defined as the destruction of the enamel, leading to holes in the teeth, gum disease or the collection of pus in the teeth or gums. Tooth decay is caused by acids produced by plaque.  

Dentists are said to be struggling to work in a system that is 'under-resourced and focused more upon experimental targets and tick boxes than patients,' according to a letter sent to The Telegraph.
Dr Tony Kilcoyne, a dentist from Haworth, West Yorkshire, who organised the letter, said: 'It is a terrible situation when you have got charities looking at Britain and seeing there is a desperate need to provide basic care.
'This letter is a wake-up call; we are urging [the] Government to act now to improve the state of dentistry and tackle the inadequacies in our system.'
As well as Dentaid, the US charity Remote Area Medical also wants to set up temporary dental clinics across the UK. 
NHS is boosting aid to at-need under five-year-olds
An NHS England spokesperson referenced a recent survey showing patients in need of an NHS dentist appointment are nearly always able to get one, with their experience being positive almost nine out of 10 times.
The spokesperson adds the NHS has recently launched a campaign known as 'Starting Well', which helps children under five from high-risk communities see a dentist.  
This comes after research in August revealed one in seven toddlers have tooth decay, with experts worrying parents do not appreciate the importance of brushing their children's teeth as they juggle the responsibility of raising a family.
Study author Maria Morgan from Cardiff University, said: 'People don't realise that you should start that early. We are having some children at five, six or seven who are having five, six, seven, eight, nine teeth removed in one go.' 

Monday, January 08, 2018

Lares Introduces New Electric Handpiece System

Lares Research has introduced a new electric handpiece system designed to deliver exceptional power, precision and sound quality while minimizing hand fatigue: The ProStyle E Electric Handpiece System. The ProStyle E system includes an autoclavable motor, a motor control box, a 1:5 highspeed fiberoptic contra angle, a 1:1 low-speed fiberoptic contra angle, and a 1:1 straight attachment.

The Lares ProStyle E Electric Handpiece System was designed to provide superior performance while reducing motor/attachment weight and size. By shortening the Mini contra angles and motor by 40% and reducing their weight by 33%, Lares shifted the balance point forward, maximizing comfort and control. With exceptional performance at affordable pricing, ProStyle E requires no installation and can be easily transported between operatories.

ProStyle E Systems and attachments can be ordered from Lares Research factory direct online at: www.laresdental.com, or by calling toll free: 1-888-333-8440, Ext. 1.

Friday, January 05, 2018

BIOLASE Receives Awards From Leading Industry Organizations For Its Dental Laser Systems

Recognized by Dentaltown for the best hard tissue laser, Dr. Bicuspid for the best new dental product, and Dentistry Today by listing the premier soft-tissue laser as a Top 50 Technology Product

IRVINE, Calif., Jan. 4, 2018 /PRNewswire/ -- BIOLASE, Inc. (NASDAQ: BIOL), the global leader in dental lasers, today announced that it has received awards for three of its dental laser systems. The Waterlase® iPlus™ picked up this year's Dentaltown Townie Choice Award, recognizing the Waterlase brand as the leading hard tissue laser for the 14th consecutive year. The Waterlase Express™ received the Dr. Bicuspid Dental Excellence Award as best new dental product in the equipment category. The Epic Pro® Diode has been listed on the Dentistry Today Readers' Choice Top 50 Technology Products list.
"Recognition by three of the dental industry's most widely recognized and respected information resources is a testament to our commitment to delivering the most advanced technologies to dentists, which enable them to provide the highest level of care to their patients," said Harold C. Flynn Jr., president and CEO of BIOLASE. "I am truly proud of the BIOLASE team and the work we've done to build the largest selection of the most cost-effective and easy to use dental laser systems available. I would like to thank our many customers whose votes for our lasers helped to make these awards possible. My congratulations to all of the other winners as well."
The company's flagship Waterlase™ brand provides highly versatile and affordable laser options never before seen in laser dentistry.
BIOLASE's smallest and most affordable all-tissue laser, the recently launched fifth-generation Waterlase Express, is a key element of the company's strategy to expand all-tissue laser use in dentistry. The flexibility, simplicity and affordability of the Waterlase Express can enable virtually every dentist to incorporate patient-sparing and practice-building laser dentistry into their practices and enhance the quality and level of care they provide their patients.
The Waterlase iPlus is one of the most powerful and versatile lasers available. Cleared for over 80 indications for soft tissue, hard tissue and bone, the Waterlase iPlus can perform more types of procedures than any other dental laser on the market. The intuitive applications-based user interface comes programmed with over 50 factory-loaded procedure presets to address everything from restorative to specialty cases.
Epic Pro is a premium diode laser from BIOLASE that allows dental professionals to manage soft tissue with industry-first and unique control features to provide unmatched cutting speed, consistency, safety and precision.
The Dentaltown Townie Choice Award is a comprehensive compilation of peer-recommended and nominated products and services available in the dental industry. The Dr. Bicuspid Dental Excellence Award acknowledges the best new products in 10 fields of dentistry. The Dentistry Today Readers' Choice Award is given on the basis of lead generation and represents dentistry's greatest innovations.
BIOLASE laser systems have secured dozens of awards for their excellence in leading the dental industry. Earlier this year, the company's Epic™ X Diode Laser was included in the Dentistry Today Top 100 Products of 2017. The company was also recognized as best-in-class for several of its products by other renowned organizations as well, including Medical Device and Diagnostic Industry ("MD+DI") and Dentalcompare, among others.
About BIOLASE, Inc.
BIOLASE, Inc. is a medical device company that develops, manufactures, markets, and sells laser systems in dentistry and medicine and also markets, sells, and distributes dental imaging equipment, including three-dimensional CAD/CAM intra-oral scanners and digital dentistry software. BIOLASE's products advance the practice of dentistry and medicine for patients and healthcare professionals. BIOLASE's proprietary laser products incorporate approximately 220 patented and 90 patent-pending technologies designed to provide biologically clinically superior performance with less pain and faster recovery times. BIOLASE's innovative products provide cutting-edge technology at competitive prices to deliver the best results for dentists and patients. BIOLASE's principal products are revolutionary dental laser systems that perform a broad range of dental procedures, including cosmetic and complex surgical applications, and a full line of dental imaging equipment. BIOLASE has sold over 35,500 laser systems to date in over 90 countries around the world. Laser products under development address BIOLASE's core dental market and other adjacent medical and consumer markets.
For updates and information on Waterlase® iPlus™, Waterlase Express™, and laser dentistry, find BIOLASE online at www.biolase.com, Facebook at www.facebook.com/biolase, Twitter at www.twitter.com/biolaseinc and LinkedIn at www.linkedin.com/company/biolase.
BIOLASE® and Waterlase® are registered trademarks of BIOLASE, Inc. 
SOURCE BIOLASE, Inc.
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Thursday, January 04, 2018

Complete rehabilitation of compromised full dentitions with adhesively bonded all-ceramic single-tooth restorations: long-term outcome in patients with and without amelogenesis imperfecta

Available online 21 December 2017


Abstract

Objectives

This clinical follow-up evaluated the long-term outcome of full-mouth rehabilitations with adhesively bonded all-ceramic restorations in patients suffering from amelogenesis imperfecta (AI) or affected by extensive tooth wear including a loss of the vertical dimension of occlusion.

Materials and methods

Included for evaluation were all patients treated with adhesively bonded monolithic single-tooth restorations made of silicate or lithium disilicate ceramics; allowing a maximum four missing teeth and a facial feldspathic veneering of LDS anterior crowns. After treatment, patients have been enrolled in a recall program for dental check-ups including quality assessment of the restorations. Patients answered the oral health impact profile (OHIP-14) at their last visit.

Results

Seventeen patients (mean age = 35 ± 18 years) were observed up to 16.5 years (mean: 6.2 ± 3.8 years). 12 out of 450 restorations failed due to core fracture (n = 7), tooth fracture (n = 2), one secondary caries, one chip-off grade 3, and one fixed dental prosthesis due to discomfort. The overall mean survival rate of the single-tooth restorations was estimated 99.4% at 5 and 91.4% at 10 years. The overall mean success rate was estimated 92.6% at 5 and 81.4% at 10 years, mainly due to chip-offs and crack formation (27out of 31 relative failures). The mean annual failure rates (AFR) range between 1.5 and 2% over the years, but non-AI patients were affected more frequently by early technical complications in the facial veneering of anteriors, resulting in an AFR ranging between 5.2 and 4%. Quality assessment revealed stable color, form and marginal integrity in all patients up to ten years. The distribution of OHIP values is comparable to the representative sample of healthy patients.

Conclusion

Adhesively bonded single-tooth restorations provided a high clinical quality in the long-run. However, while the survival and success was excellent in AI patients, restorations in non-AI patients were affected by a higher complication rate, likely related to a higher risk profile due to a history of bruxism and tooth wear.

Wednesday, January 03, 2018

Evaluation of surface characteristic changes of WaveOne Gold and WaveOne single reciprocating files using scanning electron microscopy: An in-vitro study.


Articles in Press, Accepted Manuscript , Available Online from 23 December 2017  XML PDF (519 K)
Document Type: Original Article
DOI: 10.22038/jdmt.2017.10004





Abstract
Introduction: The purpose of this study was to evaluate surface topography of WaveOne Gold (WOG) and WaveOne (WO) files before and after use with SEM. Methods: Twelve primary files from each system were scanned before instrumentation at 100x and 750x for surface defects. Each file was used to instrument six root canals then examined under SEM after preparing one, three and six canals at the same magnification. Data were scored and statistically analysed using Mann Whitney and Friedman tests (p≤ 0.05). Results: Surface defects were detected before use in both study groups with significantly higher values in WOG group. The surface defects significantly increased in both WO and WOG groups after use, WOG group showed significantly greater defects including metal strips, pitting, craters, micro-cracks and blunt edges (p≤ 0.05). Conclusion: WaveOne Gold file has a different metallurgy due to its gold finish which did not enhance its resistance to surface defects during clinical use.

Tuesday, January 02, 2018

Effect of dentin hypersensitivity treatment on oral health related quality of life — A systematic review and meta-analysis

Available online 17 December 2017


Abstract

Objective

This study aimed to evaluate if in patients with dentin hypersensitivity (DH), the DH treatments are able to improve individuals’ oral health related quality of life (OHRQoL).

Data and sources

A systematic review was performed based on PRISMA guidelines (PROSPERO CRD42016050864). Clinical trials reporting OHRQoL before and after DH treatment were included. The search was performed in the PubMed/MEDLINE, Scopus, Web of Science, Cochrane Library, LILACS, EMBASE and Scielo databases until May 2017. Hand searches and grey literature were included. Three researches independently selected the studies, extracted data, and assessed the methodological quality. The risk of bias was estimated based on the Cochrane Handbook for Systematic Reviews of Interventions. Meta-analysis was performed by I2 test. The quality of evidence was assessed using Grading of Recommendations Assessment, Development and Evaluation (GRADE).

Study selection

Six clinical trials were included. DH was assessed by evaporative, cold, and tactile stimuli. OHRQoL was evaluated by OHIP-14 and DHEQ questionnaires. In-home and in-office desensitizing agents for DH treatment were used. The revised studies reported statistically significant reduction of DH and significant improvement in quality of life after treatment (p<0 .05="" as="" bias.="" heterogeneity="" high="" judged="" of="" presented="" risk="" studies="" sup="" the="" two="" were="">2
=0.8407). The evidence was very low to moderate.

Conclusions

The studies indicated decreasing of DH and improving of OHRQoL after DH treatment, although, they presented low to moderate methodological quality.

Clinical significance

The Oral Health Relate Quality of Life of whom complaint of DH can be improved after DH treatment.