Introdouction: Dentinal hypersensitivity (DH) is one of the most painful chronic problems reported in dental offices. Various methods have been applied for the treatment of DH. However, majority of them are either ineffective or last for a short period of time. It has been reported that lasers, particularly Neodymium- doped: Yttrium Aluminum Garnet laser (Nd: YAG), can be helpful in the treatme...

Background: The main factor causing failure of root canal treatment is re-infection the bacterium Enterococcus faecalis, so it necessary to give right intracanal medicament. Calcium hydroxide (Ca(OH)2) an medicament often used in endodontic treatment. To increase effectiveness calcium hydroxide, a mixing agent needed. Mixing agents such as Chlorhexidine digluconate (CHX) 2% (aqueous) and Clinda...

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...

INTRODUCTION The aim of this in vitro study was to evaluate the effect of 10% citric acid and 17% ethylenediaminetetraacetic acid (EDTA) irrigating solutions on the surface morphology of young and old root dentin by determining the number and diameter of dentinal tubules using scanning electron microscopy (SEM). METHODS AND MATERIALS Fifty healthy human teeth collected from young (≤30 years) ...

Pulp and Periradicular Pathways 2 Natural Pathways 2 Apical foramen 2 Lateral canals 4 Dentinal tubules 4 Pathological and Iatrogenic Pathways 5 Dental caries 5 Role of microorganisms 6 Root perforations 7 Root perforations during access preparation 7 Root perforations during cleaning and shaping 8 Root perforations during post space preparations 10 Vertical fracture 10 Periradicular Pathosis 1...

DP-bioglass paste has been demonstrated to produce 60 microm of sealing depth on exposed dentinal tubules. However, the occlusive effect depended on a continuous placement of DP-bioglass paste on dentinal surface for three days. In a bid to fabricate highly reactive DP-bioglass particles, a sol-gel method was used together with HNO3, NaOH, and H3PO4 as catalysts. As a result, the application ti...

INTRODUCTION This study analyzed the in vivo microbiological status of the root canal systems of mesial roots of mandibular molars with primary apical periodontitis after 1- or 2-visit endodontic treatment. METHODS Mesial root canals were instrumented by using either a combination of K3 and LightSpeed instruments (mesiobuccal canals) or the ProTaper system (mesiolingual canals), with 5% NaOCl...

The smear layer was first described by McComb in a scanning electron microscope (SEM) study. The smear layer consists of organic and inorganic substances, including fragments of odontoblastic processes, dentinal shaving, microorganisms, and necrotic materials. Presence of this smear layer prevents penetration of intracanal medication into the irregularities of the root canal system and the dent...

Recently, endodontic sealers based on injectable bioactive materials were proposed to improve the filling of anatomical irregularities during root canal obturation. In this context, preliminary work investigated possibility realizing a new calcium phosphate-based composite sealer for with an optimized composition setting kinetics and dentin tubules occlusion. Several phosphate/liquid phase mixt...

The purpose of this study was in vitro evaluation and comparison of the adhesion of self-etch (SE) adhesive systems applied on normal and sclerotic dentin. For this study, Class 5 cavities were prepared on sound teeth as well as on teeth with sclerotic dentin. They were then restored by means of the SE 2-step OptiBond XTR (Kerr) and SE 1-step Bond Force (Tokuyama Dental) adhesive systems, as we...