Surface-Modified Poly(l-lactide--glycolide) Scaffolds for the Treatment of Osteochondral Critical Size Defects-In Vivo Studies on Rabbits.

Poly(l-lactide--glycolide) (PLGA) porous scaffolds were modified with collagen type I (PLGA/coll) or hydroxyapatite (PLGA/HAp) and implanted in rabbits osteochondral defects to check their biocompatibility and bone tissue regeneration potential. The scaffolds were fabricated using solvent casting/particulate leaching method. Their total porosity was 85% and the pore size was in the range of 250-320 µm.

Flattening of the articular eminence is associated with the loss of occlusal support: radiological study.

Background: Degenerative changes in the temporomandibular joint might be associated with ageing and/or with the loss of occlusal support.

Objective: The aim of the study was to evaluate whether the inclination of the posterior slope of the articular eminence changes in association with: (i) ageing in patients with maintained occlusal support zones (OSZs); and (ii) the loss of OSZs in elders.

Methods: In this retrospective radiological study, selected orthopantomograms were allocated into the following groups: I-age 18-35, maintained OSZs, II-age 36-60, maintained OSZs, III-age >60, at least one OSZ per side maintained, IV-age >60, loss of all OSZs.

Dental implant examination based on the log-polar matching of the maxillary radiograph images in the anisotropic scale space.

In this paper a computer vision system is proposed for automatic examination of implant placements based on the maxillary radiograph images. To find rotated and scale changed implants the system does template matching in the extended log-polar space. Matching is proposed to be performed in the anisotropic scale-space, starting from the coarse level.