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.

Health-related quality of life in patients with obstructive sleep apnea: effects of long-term positive airway pressure treatment.

The aim of the present study was to determine the effect of middle and long-term positive airway pressure (CPAP) treatment on the health-related quality of life in patients with obstructive sleep apnea. We prospectively studied two groups of patients with this disease; a group of 42 patients (33 men and 9 women) with a mean age of 55.2 +/- 7.

Factors influencing the fracture of nickel-titanium rotary instruments.

Aim: To evaluate the effect of rotational speed and the angle and radius of curvature of root canals on the fracture of two types of nickel-titanium rotary instruments: K3 and ProTaper.

Methodology: A total of 240 root canals of extracted human maxillary and mandibular molars were divided into two groups of 120, according to the angle of the canal curvature (group A: <30 degrees, group B: >30 degrees). Each group was then divided into two subgroups of 60 canals in order to perform instrumentation using K3 and ProTaper rotary instruments at three different rotational speeds: 150, 250 and 350 r.

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.