Preservation of the natural tooth structure or its strength reinforcement, as far as possible, should always be the prime conservative concern for a dental practitioner, than vigorous replacement of the missing teeth, as Muller De Van rightly quoted. Endodontic treatment often yields up sparse amount of tooth structure, with inadequate coronal bulk, when the carious invasion is extensive; there...

We present the management of a case of Type II dens invaginatus in a mandibular premolar with a large invagination in the coronal third of the root on mesial aspect of the crown in proximity of cementoenamel junction significantly compromising the strength of the crown structure. We describe in detail the various measures taken to assess the internal tooth structure destruction and enhance the ...

Prosthodontic treatment sometimes requires a long-term interim fixed dental prosthesis (FDP) until the definitive restoration can be cemented. However, some interim materials are weak and do not have an adequate marginal seal. The CAD/CAM systems have developed considerably, offering accuracy and more options than previously. It can be envisioned that CAD/CAM technology developments will contin...

With the advent of new provisional crown materials, it has become imperative to evaluate their strength in order to select the appropriate crown material. This study examined the fracture resistance of three different provisional materials. To simulate oral conditions, the specimens were fabricated in brass molds, ensuring their similarity to premolars. The 33 fabricated specimens were divided ...

The purpose of this study was to investigate the fracture strength endodontically treated human maxillary premolars (ETP) restored with posts and metal ceramic (MC) or monolithic zirconia (MZ) crowns. Sixty ETP were randomly divided into 3 groups. Teeth in control group (C) received a resin filling. MC prefabricated posts, composite cores crowns while MZ glass-fiber Half specimens loaded at 135...

Tensile cracks in soil slopes, especially developing at the crown, have been increasingly recognized as signal of slope metastability. In this paper, role crown natural slopes was investigated and its effect on stability studied. A numerical modeling simulation tensile behavior soil, based Extended Finite Element Method (XFEM), used. test applied to validate use XFEM before simulation. Slope fa...

Macrocycle-based ion chromatography provides a convenient, reliable method for the determination of perchlorate ion, which is currently of great interest to the environmental community. This study shows that effective perchlorate determinations can be made using standard conductimetric detection by combining an 18-crown-6-based mobile phase with an underivatized reversed-phase mobile phase ion ...

INTRODUCTION Endodontic restoration becomes a challenging task for the clinician because of severe loss of coronal tooth structure owing to trauma, caries, restorative, and endodontic procedures. The restoration of these teeth requires the use of a post and core as individual units or as abutment supports for fixed or removable restorations in a predictable long-term manner. AIM To compare an...

Moisture contamination is a major factor in sealant application, often determining clinical success or failure. A new enamel conditioner using HNO3 (2.5%) has been introduced that does not require a water rinse after etching. The aim of this study is to compare etching characteristics using sealant retention from shear bond strength tests for traditional etch conditioning using H3PO4 (37%) and ...