This in vitro study compares the etching effects of acid treatment and Er:YAG laser radiation on the enamel of extracted permanent human molars. Oval cavities in the buccal surface were prepared in the conventional manner and then the edges of the cavities were irradiated by Er:YAG radiation. Laser energy was 105 mJ and 208 mJ and the repetition rate was 1 Hz. The radiation was focused by a CaF...

AIM To compare the effectiveness of two anti-infective protocols for the treatment of peri-implant mucositis. MATERIALS AND METHODS Twenty-nine patients with one implant diagnosed with peri-implant mucositis (bleeding on probing [BOP] with no loss of supporting bone) were randomly assigned to a control or test group. Following an assessment of baseline parameters (probing depth, BOP, suppurat...

Introduction: The restoration of endodontically treated teeth is a topic that has been studied extensively but it is still a challenge for dental practitioners. The aim of this study was to evaluate fracture resistance, fracture patterns and fracture location of endodontically treated human maxillary premolars restored with direct and indirect composite resin and ceramic restoration. Methods: E...

This paper presents a validation framework for collateral requirements or margins on a derivatives exchange. It can be used by investors, risk managers, and regulators to check the accuracy of a margining system. The statistical tests presented in this study are based either on the number, frequency, magnitude, or timing of margin exceedances, which are de…ned as situations in which the trading...

In this communication, hexapod tripod gaits for straightline motion and crab walking are derived. Mathematical relations that express the stability margin, the stride length, and the duty factor are formulated for straight-line motion and for crab walking, respectively. The derived results provide tripod gaits of the hexapod for walking with a prescribed stability margin either over perfect ter...

abstract marketing element’s contrastive behaviors toward price risk had considerable effect on marketing margin in a way that transferring increase in price to final consumer, reduces purchasing power and so consumption amounts of consumers. present study evaluated effective parameters on marketing margin in 2 level of ranch-processing and processing- retail of beef and lamb with consideration...

Abstract We make use of own geological mapping, interpretations seismic reflection profiles and deep geophysical data to build a lithospheric-scale cross-section across the European Western Southern Alps (Varese area) model progressive restoration from end Mesozoic rifting present-day. Early phases Alpine orogeny were characterized by Europe-directed thrusting, whereas post-Oligocene shortening...

Purpose: The aim of this study is to evaluate the effect changes in margin design on stress distribution restoration zirconia-based full-crown restorations using 3D finite element analysis. Material and Methods: To be used restorations, tooth number 16 was prepared chamfer step type a maxillary tooth-jaw model (AG-3: Tipodont, frasaco, Germany). scanned desktop scanner, analysis obtained. Zirco...

The need to perform restorations with a natural appearance is one of the most challenging aspects Dentistry, as well reproduction color teeth in clinical challenge, due complex optical characteristics dentition Natural. As use ceramics more opaque restorative materials or different thicknesses, there great difficulty obtaining adequate results relation final restoration. objective this work rep...