STATEMENT OF PROBLEM Over the years, resin-bonded fixed partial dentures (RBFPDs) have gone through substantial development and refinement. Several studies examined the biomechanics of tooth preparation and framework design in relation to the success rate of RBFPDs and considered retention and resistance form essential for increase of clinical retention. However, these criteria required prepara...

PURPOSE The aim of this study was to compare the retention characteristics of various overdenture attachment systems commonly used to retain overdentures to dental implants. MATERIALS AND METHODS An edentulous mandibular model was constructed incorporating 2 parallel 4.0 mm x 13 mm Branemark implants placed in the canine regions. Attachments were embedded in a metal-reinforced experimental ov...

OBJECTIVE Finite element analysis was used to compare preoperative and postoperative stress distribution of a bone healing model of femur fracture, to identify whether broken ends of fractured bone would break or not after fixation dislodgement one year after intramedullary nailing. Method s: Using fast, personalized imaging, bone healing models of femur fracture were constructed based on data ...

PREMISE OF THE STUDY Intertidal macroalgae must resist extreme hydrodynamic forces imposed by crashing waves. How does frond flexibility mitigate drag, and how does flexibility affect predictions of drag and dislodgement in the field? METHODS We characterized flexible reconfiguration of six seaweed species in a recirculating water flume, documenting both shape change and area reduction as fro...

Pacemaker twiddler's syndrome is the phenomenon whereby a pacemaker patient may actively dislodge a pacing electrode by manipulating, often unconsciously, the permanent implanted pacemaker. This unusual case is remarkable in several respects: surgical precautions, originally taken to secure the pulse generator against migration, proved ineffective; the displaced lead featured an active fixation...