Polymer composites bring a smile to dental fillings

Amalgam dental fillings and hearing loss.

In this study we investigated the effects of amalgam dental fillings on auditory thresholds. Participants (n=39) were non-smoking women age 40 to 45. Regression and correlation analyses were performed between auditory thresholds, measured from 0.25 to 16 kHz, and the number/surface area of dental fillings, using the ASHA criteria for ototoxic change as a reference for comparison. No significant...

Bisphenol-A in Dental Composites

The presence of plastic polymers in dental composites has caused uncertainty in the minds of people who are suspicious of the potential impact of plastics on human health. In particular, one component of composite resins, bisphenol-A (BPA), has attracted attention because it can act as a xenoestrogen. For better or for worse, all dental materials are non-biological chemicals, and the only way w...

Polymer Microvascular Network Composites

Microvascular networks show promise for applications such as selfhealing, self-cooling, and structural damage sensing. Fluid-filled micro-scale channels have been investigated extensively in the field of microfluidics, but threedimensional networks in polymeric structural materials have been achieved only recently. The purpose of microvascular network integration is to provide a vehicle for the...

Ionomeric Polymer-Metal Composites

Technical Quality of Root Fillings Performed by Dental Students in Babol Dental School

Introduction: There is substantial evidence that the technical quality of root canalfilling has a significant effect on the outcome of root canal treatment. Theaim of this study was to evaluate the technical quality of root canal fillingsperformed by dental students. Methods: The records of 325 teethradiographs, treated by dental students in 2008-2009 in Babol Dental School,were selected and ev...