OBJECTIVE To determine the prevalence of dentinal lesions treatable through the atraumatic restorative treatment (ART) approach for high caries risk schoolchildren. SUBJECTS AND METHODS A convenience sample was taken of 1,542 grade 1 and 931 grade 2 children from 21 primary schools in a low socio-economic area in Damascus. Dentinal lesions in which the smallest excavator (diameter of 0.9 mm) ...

BACKGROUND One current strategy for the treatment of carious lesions is the use of biomaterials with antimicrobial activity. AIMS The aim of this study was to evaluate a combination of hydroxyapatite and lysozyme for the treatment of dentinal caries by measuring Streptococcus mutans counts before carious tissue sealing, and 24 h, 1 month, and 6 months after treatment. MATERIALS AND METHODS ...

BACKGROUND The incidence of dentinal defects may influence the outcome of root canal treatment. The aims of this study were to evaluate and compare the incidence of dentinal defects following root canal obturation with two different techniques. MATERIALS AND METHODS A total of 110 mesial roots of human mandibular first molars were selected. Twenty-seven roots were left unprepared as negative ...

The purpose of the present study was to study the occurrence of radicular dentinal defects after using EDTA gel during preparation of the root canal with ProTaper Universal (Dentsply Maillefer, Switzerland), HyFlex (ColteneWhaledent, Allstetten, Switzerland), and ProTaper Next (Dentsply Maillefer) rotary instruments. Forty-eight single rooted premolars were selected. Twelve teeth were instrumen...

introduction: various methods have been used for the treatment of dentine hypersensitivity such as dentifrices, sealants and different types of lasers. the aim of this study was to evaluate the effect of neodimium:yttrium-aluminium-garnet (nd:yag) laser in association with graphite on the dentin morphologic changes. methods: in this experimental in vitro study, 16 freshly extracted third molars...

BACKGROUND Endodontic therapy is considered a series of important and interdependent steps, and failure of any of these steps may compromise the treatment outcome. This study aimed to evaluate the effectiveness of three different rotary systems in removing obturation materials during endodontic retreatment using scanning electron microscopy (SEM) analysis. MATERIAL AND METHODS Thirty-six endo...

A variety of methacrylate-based materials has been developed with the capacity of adhering to dentin. This study investigated the effectiveness of 2-(methacryloxy)ethyl phenyl hydrogenphosphate (phenyl-P) for bonding 5% phenyl-P in methyl methacrylate (MMA) to dentinal surfaces. Polymerization of the phenyl-P/MMA monomer was initiated by partially oxidized tri-n-butyl borane catalyst (TBB). The...

Introduction The aim of this study was to evaluate the incidence of dentinal defects and vertical root fractures (VRFs) after endodontic retreatment and mechanical cycling (MC). Methods and Materials Two hundred mandibular premolars were selected. Forty teeth were left unprepared (control group). The remaining 160 root canals were prepared with ProTaper instruments and filled by using two dif...

Bacterial invasion of dentinal tubules commonly occurs when dentin is exposed following a breach in the integrity of the overlying enamel or cementum. Bacterial products diffuse through the dentinal tubule toward the pulp and evoke inflammatory changes in the pulpo-dentin complex. These may eliminate the bacterial insult and block the route of infection. Unchecked, invasion results in pulpitis ...

Cell wall-anchored polypeptides of the antigen I/II family are produced by many species of oral streptococci. These proteins mediate adhesion of streptococci to salivary glycoproteins and to other oral microorganisms and promote binding of cells to collagen type I and invasion of dentinal tubules. Since infections of the root canal system have a mixed anaerobic bacterial etiology, we investigat...