Peritubular dentin (PTD) is a hypermineralized phase within the dentinal tubules in some vertebrate teeth as an interface between the intertubular dentin (ITD) and the cell processes. Our aim has been to understand the composition, structure and role of PTD as a mineralized tissue. We have utilized the technique of time of flight secondary ion mass spectrometry (TOF-SIMS) to map the distributio...

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...

The histological processing of teeth is highly complicated because of containing both mineralized hard tissues and soft tissues. Depending on the type of decalcification agents used in processing, mild-to-severe deterioration in the tissue structure and inadequacies on clear staining of details by the histological stain may be observed. This study aims to compare the histological staining diffe...

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...

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...