Sustained attention measurements in obstructive sleep apnea and risk of traffic accidents.

Unlabelled: The aim of this study was to identify associations between performance on driving simulators, subject sleep complaints, and risk of traffic accidents in a population undergoing OSAS investigation.

Patients And Methods: One hundred and twenty-nine consecutive adult patients with a driver's licence and clinical symptoms of OSA were initially recruited from the hospital waiting list. Each patient was applied a polysomnography and two driving tests.

The effect of rotational speed and the curvature of root canals on the breakage of rotary endodontic instruments.

One of the biggest concerns when working with rotary endodontic instruments is that the instrument might break in the root canal thus compromising the treatment. This study evaluated the effect of rotational speed and the curvature of root canals on the breakage of ProFile rotary instruments to determine whether either causes an increase in instrument breakage. One hundred twenty root canals of extracted molars were divided into two groups according to whether the curvature of the canal was greater or lesser than 30 degrees.