http://www.biofilling.com/article/7_2Mineral.pdf

Mineral Trioxide Aggregate: A Comprehensive Literature Review—Part III: Clinical Applications, Drawbacks, and Mechanism of Action

https://www.endoexperience.com/documents/PIIS0099239909008978.pdf

Critical Review on Methacrylate Resin–based Root Canal Sealers

The number of products containing probiotics, viable bacteria with proven health benefits, entering the market is increasing. Traditionally, probiotics have been associated with gut health, and most clinical interest has been focused on their use for prevention or treatment of gastrointestinal infections and diseases; however, during the last decade several investigators have also suggested the use of probiotics for oral health purposes. The aim of this review is to examine potential mechanisms of probiotic bacteria in the oral cavity and summarize observed effects of probiotics with respect to oral health. The review focuses on probiotic lactobacilli and bifidobacteria, genera that are most used in various probiotic products.

/pdf/probiotics-and-oral-health-piantzdadt.pdf

Probiotics and Oral Health

Probiotics or health-beneficial bacteria have only recently been introduced in dentistry and oral medicine after years of successful use in mainly gastro-intestinal disorders The concept of bacteriotherapy and use of health-beneficial micro-organisms to heal diseases or support immune function was first introduced in the beginning of the 20th century Later the concept lead to the development of modem dairy industry and even today most probiotic strains are lactobacilli or bifidobacteria used in milk fermentation The mechanisms of probiotic action are mainly unknown but the inter-microbial species interactions are supposed to play a key role in this together with their immuno-stimulatory effects The introduction of probiotic bacteria in the mouth calls for ascertainment of their particular safety Since acid production from sugar is detrimental to teeth, care must be taken not to select strains with high fermentation capacity The first randomized controlled trials have nevertheless shown that probiotics may control dental caries in children due to their inhibitory action against cariogenic streptococci Less evidence exists on their role in periodontal disease or oral yeast infections Furthermore the best vehicles for oral probiotic applications need to be assessed So far mainly dairy products have been investigated but other means such as probiotics in chewing gums or lozenges have also been studied From the clinical practitioner's point of view direct recommendations for the use of probiotics cannot yet be given However, scientific evidence so far indicates that probiotic therapy may be a reality also in dentistry and oral medicine in the future

/pdf/probiotics-health-benefits-in-the-mouth-31enqx06bp.pdf

Probiotics: health benefits in the mouth.

Survival of direct resin restorations in posterior teeth within a 19-year period (1996–2015): A meta-analysis of prospective studies

Aim: The aim of the study was to evaluate the adhesion of Lactobacillus delbrueckii subsp. bulgaricus and Lactobacillus rhamnosus strain GG to saliva-coated surfaces in vitro.



Methods:  Fifteen radiolabeled dairy L. delbrueckii subsp. bulgaricus strains and L. rhamnosus GG were tested for their ability to adhere to saliva-coated hydroxyapatite beads and polystyrene microtiter plates and the radioactivity was measured by liquid scintillation counter. The effects of lysozyme on the adhesion of lactobacilli and of pretreatment with lactobacilli on the adhesion of Streptococcus sanguinis were also assessed.



Results:  All strains tested adhered to saliva-coated surfaces but with significantly different binding frequencies. The adhesion of the L. delbrueckii subsp. bulgaricus strains remained lower in comparison to L. rhamnosus strain GG. One L. delbrueckii subsp. bulgaricus strain showed binding frequency comparable to S. sanguinis. Lysozyme pretreatment of the samples significantly increased lactobacillus adhesion to saliva-coated surfaces.



Conclusion:  The present results showed significant variations in the adhesion capacity of the Lactobacillus strains studied. Adhesion to oral surfaces is of primary importance for bacterial colonization in the mouth. Only one of the L. delbrueckii subsp. bulgaricus dairy starter culture strains investigated had a high adhesion percentage. This strain might then be considered for further investigations in the oral environment.

In vitro evaluation of yoghurt starter lactobacilli and Lactobacillus rhamnosus GG adhesion to saliva-coated surfaces.

The purpose of this study was to investigate the amount of residual monomer in a composite resin after light-curing with different sources, light intensities and spectra of radiation. The resin specimens (4 mm in diameter; 2 mm thick) (n=5) were inserted in Plexglass matrixes and light-cured with a halogen lamp, LED and PAC units for 40, 40 and 5 s, respectively. The polymerized specimens were ground and 25 mg of each specimen were immersed in 8 mL 96% ethanol for 24 h to extract the residual monomer. The amount of residual monomer was determined by the standard straight line method. The light spectrum of the different LCUs was shot and processed through researches of the absorbation of the standard solutions at a level of l= 275 nm and their extracts. Data were analyzed statistically by variational dispersion analysis and Tukey-Kramer test at 5% significance level. It was observed that, the halogen lamp produced the smallest amount of monomer under sufficient light intensity. The spectrum of light radiation of PAC was within the limits of 450- 490 nm and was of extremely high intensity. This imposes the use of short-limited light impulses, but also might lead to deterioration quality of polymerization. The LED unit had the best spectral radiation. An increase of light intensity was proved necessary.

/pdf/residual-monomer-in-a-composite-resin-after-light-curing-ypinckc9jl.pdf

Residual monomer in a composite resin after light-curing with different sources, light intensities and spectra of radiation

AIM The aim of the present study was to compare the accuracy of working endodontic length determination by Dentaport ZX and Ray Pex 4 under clinical conditions. MATERIAL AND METHODS Clinical comparative evaluation of the accuracy of two electronic apex locators, Dentaport ZX and Ray-Pex 4, was carried out in 80 single-rooted teeth with vital pulp tissue planned for extraction as part of the dental treatment and after patient consent had been obtained. The normal procedure was followed, which included anesthesia, a standard endodontic access cavity, pulp removal and irrigation of the root canal with 5.25% NaOCl. The working length was estimated with Dentaport ZX for half of the selected teeth and with Ray-Pex 4 for the other half. K-files #15 were cemented at the measured working length and the teeth were extracted. The apical foramen was examined with a stereomicroscope under x15 magnification. The micrometric system of the microscope allowed precise measurement of distances. RESULTS The comparison of the estimated working length with the actual length revealed that Dentaport ZX localized the apical foramen in 95% of the cases and the Ray Pex 4 in 92.5% with a clinically acceptable accuracy of +/- 0.5 mm. Dentaport ZX detected the foramen in 97.5% and Ray Pex 4 in 95% of the cases with an accuracy of +/- 1 mm. There was no statistically significant difference between the accuracy of the two electronic apex locators in locating the apical foramen (p < 0.05).

Evaluation of the accuracy of electronic apex locators Dentaport ZX and Ray Pex 4 under clinical conditions.

INTRODUCTION In the era of adhesive restorative dentistry the principles of conventional cavity preparation have acquired a new meaning. The emphasis is shifted from "widening for preventive purposes" and preparation of macro-mechanical retention to "consciously limited" preparation. The clinical and biological durability of restorations depends on the adhesive bond and the quality of the composite material. OBJECTIVE The aim of the study was to conduct a clinical evaluation of restorations with a self-etch single-step adhesive and nanofilled composite in class I and class II cavities over a period of 15 months. PATIENTS AND METHODS The clinical trial involved 34 patient (volunteers) who received 76 posterior restorations of medium and deep cavities with the self-etch adhesive Adper Prompt L-Pop and nanofilled composite Filtek Supreme (3MESPE Dental products USA). All restorations were evaluated by the modified Ryge and Cvar criteria at 6- and 15-month intervals. RESULTS Loss of restorations with a self-etch single-step adhesive and nanofilled composite at 6 months and 15 months was 0% and 6.7%, respectively. The evaluation of discolouration in the restorations at 6 months revealed no significant changes (P > 0.05, u = 1.72). There was certain deterioration in the colour at 15 months (P 0.05, u = 0.36). There were no C (Charlie) scores recorded during the 15-month follow-up study within the continuing observation. CONCLUSION The restorations with nanofilled composite and self-etch single-step adhesive fulfill the requirements for clinical use in posterior restorations.

Clinical evaluation of restorations with self-etch adhesive and nanofilled composite in class I and class II cavities.

Introduction The postoperative tooth sensitivity is a dental caries post-treatment complication of unknown origin The variety of clinical symptoms of this condition, the contributing factors and their interactions may be presented by means of network analysis Aim The aim of the present study was to apply network analysis to present the relationships between factors contributing to post-operative sensitivity according to practicing dentists Patients and methods We carried out an anonymous questionnaire survey of 213 dentists to assess their experience with diagnosed post-operative sensitivity The duration and kind of the condition was studied to find its correlation with the type of restorative material, the location of carious defect, and the depth of carious defect The respondents gave their opinions about the probable causes of post-operative sensitivity Multiple answers to one question were allowed Data was processed with the help of SPSS and UciNet Results 806 ties between factors for post-operative sensitivity were investigated Their absolute size (C) ranged from -16 to +175 The most significant relationships, defined at C > or = 03, comprised 20% of all ties Conclusions The following relationships between factors associated with post-operative sensitivity were found: cold-induced pain of up to 1 week duration after treatment of caries profunda acuta and placement of an amalgam restoration; pressure-induced pain of up to 3 weeks duration after treatment of caries profunda chronica, class II cavities and placement of a composite resin restoration The visualized structures of interrelated factors represented only the clinical experience of the questioned dentists Their confirmation in clinical practice is a matter of future investigations

Stoyan B Vladimirov

Papers

In vitro evaluation of yoghurt starter lactobacilli and Lactobacillus rhamnosus GG adhesion to saliva-coated surfaces.

Residual monomer in a composite resin after light-curing with different sources, light intensities and spectra of radiation

Evaluation of the accuracy of electronic apex locators Dentaport ZX and Ray Pex 4 under clinical conditions.

Clinical evaluation of restorations with self-etch adhesive and nanofilled composite in class I and class II cavities.

Factors for post-operative sensitivity in dental caries treatment according to practicing dentists--application of network analysis.