i ntroduction: nano-hydroxyapatite (nha) has been used for regeneration of osseous defects. calcium-enriched mixture (cem) cement is also used for various dental treatments. this trial compared the efficacy of nha and cem cement for direct pulp capping (dpc) of sound primary teeth. methods and materials: in this randomized clinical trial with split-mouth design, after attaining informed consent...

Fundamental interactions between polymeric superplasticizers and cement are studied. Cements with different alite-, belite-, C3Aand C4AF-contents are used. The use of commercially available superplasticizers like melamine formaldehyde sulfite(MFS) and β-naphthalene sulfonic acid formaldehyde-(NSF) resins is investigated. These superplasticizers (industrial products) are characterized by means o...

AIM The aim of this study was to compare the bacterial leakage of mineral trioxide aggregate (MTA), calciem enriched cement (CEM), and bone cement (BC) as repair materials in furcal perforations. METHODS The pulp chambers of 57 human mandibular molar teeth were accessed and the root canal orifices were located. The roots were horizontally sectioned in the middle third. Composite resin was use...

introduction: particle size and distribution can influence the properties of materials. this study analyzed and compared the particle size of root mta, calcium hydroxide (ch), and a new endodontic cement called calcium enriched material (cem). materials and methods: the particle size of each material was analyzed three times using 0.05 mg of test material with a particle size analyzer. the part...

STATEMENT OF PROBLEM Sealing the perforation defect is an important factor to reduce inflammation in the area and to perform healing. Selecting the appropriate material to repair the defect is an important concern. Among the various available materials, MTA and CEM are used recently for achieving this purpose. In the current study we compare the sealing ability of these materials by evaluating ...

STATEMENT OF PROBLEM Previous studies have shown discoloration of mineral trioxide aggregate (MTA) in contact with root canal irrigation solutions. However, there are limited data on colour stability of other calcium silicate-based materials (CSMs). OBJECTIVES This in vitro study aimed to evaluate the colour stability of three CSMs in contact with different irrigation solutions. MATERIALS A...

INTRODUCTION The provision of an effective apical seal is an essential factor when choosing an appropriate material for success of root-end surgeries. Root-end resection, preparation and obturation should provide an adequate apical seal. The aim of this in vitro study was to investigate bacterial and dye microleakage of four different root-end filling materials and compare the efficacy of these...

INTRODUCTION This in vitro study compared the coronal microleakage of mineral trioxide aggregate (MTA), calcium-enriched mixture (CEM) cement and Biodentine as intra-orifice barriers. METHODS AND MATERIALS The study was conducted on 76 extracted single-canal human teeth. Their root canals were prepared using ProTaper rotary files and filled with gutta percha and AH-26 sealer using lateral con...

INTRODUCTION This laboratory study was performed to evaluate the effect of different acidic pH values on the push-out bond strength of calcium-enriched mixture (CEM) cement. METHODS AND MATERIALS Forty-eight root dentin slices were obtained from freshly extracted single rooted human teeth and their lumen were instrumented to achieve a diameter of 1.3 mm. Then, CEM cement was mixed according t...

A modified direct contact test was used to evaluate the antibacterial properties of four commercially available dental luting agents (RelyX Unicem, Ketac Cem, Ceramir Crown & Bridge and Harvard Cement) and two reference materials (glass-ionomer cement and calcium aluminate cement) compared to a negative-control material (PMMA). Streptococcus mutans bacteria were placed in direct contact with sp...