BACKGROUND With the aim of developing methods that could increase the fracture resistance of structurally compromised endodontically treated teeth, this study was conducted to compare the effect of three esthetic post systems on the fracture resistance and failure modes of structurally compromised and normal roots. MATERIALS AND METHODS Forty five extracted and endodontically treated maxillar...

Introduction: Application of light transmitting posts to restore greatly damaged endodontically treated teeth has been increased. It is suspected that light intensity decreases as it passes throughout different materials. This can reduce the degree of conversion required for adequate bond strength throughout the length of these posts. The objective of this study was to evaluate the amount of li...

AIM The aim of this study was to investigate the fracture resistance and failure mode of premolars restored with composite resin using various prefabricated posts. METHODS AND MATERIALS Sixty sound maxillary premolars were divided into four equal sized groups. All but the control group received endodontic treatment followed by placement of mesiodistocclusal (MOD) composite restorations (Tetri...

The aim of this study was to evaluate the effects of plasma treatment on adhesion between fiber-reinforced posts and a composite core material. Two types of posts, methacrylate-based (FRC Postec) and epoxy resin-based (DT Light-Post), were treated with oxygen plasma (O(2)), argon plasma (Ar), nitrogen plasma (N(2)), or helium mixed with nitrogen plasma (He+N(2)) using a radio-frequency generato...

the effects of closely adapting a prefabricated fiber to the post space remain unknown. the purpose of this study was to quantify the microleakages of a custom adapted fiber-reinforced post, a prefabricated quartz fiber post and a cast post using nondestructive methods.sixty-five extracted human premolars were endodontically treated and randomly divided into three groups (n=15), which were rest...

The post-Newtonian mean anomaly advance as further post-Keplerian parameter in pul-sar binary systems. Abstract The post-Newtonian secular rate of the mean anomaly ˙ M has been worked out for a two-body system in the framework of the General Theory of Relativity. The possibility of using it as a further post-Keplerian parameter in pulsar binary systems is examined. The resulting effect is almos...

PURPOSE We evaluated predictors of prostate cancer-specific mortality (PCSM) after prostate-specific antigen (PSA) failure after radical prostatectomy (RP) or radiation therapy (RT). PATIENTS AND METHODS A total of 1,159 men with clinically localized prostate cancer treated with RP (n = 498) or RT (n = 661) developed PSA failure, and they formed the study cohort. Competing risk regression ana...