Rotational movements of mandibular two-implant overdentures.

Objectives: Clinicians have reported that their patients complain that their mandibular two-implant overdentures (IOD) rotate. Therefore, we studied the frequency and severity of rotation of IODs with two-ball attachments, how rotation may influence perceived satisfaction ratings of chewing ability, and the factors that are involved in the rotation of IODs.

Material And Methods: Seventy-nine participants were recruited and asked to rate their general satisfaction of their IODs, as well as their ability to chew foods, the existence of any mandibular denture rotation, and to what degree denture rotation bothered them.

Crystalline low band-gap alternating indolocarbazole and benzothiadiazole-cored oligothiophene copolymer for organic solar cell applications.

A low band-gap alternating copolymer of indolocarbazole and benzothiadiazole-cored oligothiophene demonstrated balanced crystallinity and solubility; a solar cell combining this polymer with PC(61)BM in a preliminary test demonstrated power conversion efficiencies of 3.6%.

Monitoring recruitment success and cost in a randomized clinical trial.

Recruitment of older adults into research studies is challenging and, as a consequence, the recruitment period is often extended and more expensive than planned. This study monitored the effectiveness (number of subjects attracted) and cost of different recruitment strategies when recruiting edentulous elderly adults. Socio-demographic data were gathered and compared to 2001 Canadian census data.