Abstract: An improved dental implant system which simulates the natural root of a tooth is provided. The system includes an implant body having a facial surface aspect, lingual surface aspect and interproximal surface aspect, and which is defined by an apical portion and a coronal portion. The system also includes an implant abutment having an internal surface aspect for selective mating engagement with the coronal portion of the implant body and also having an external surface aspect. The system further includes a crown having an internal surface aspect for selective mating engagement with the external aspect of the implant abutment. Significantly, the implant body has a bone integrating external surface which, in a coronal direction, extends more along the interproximal aspect than along the facial aspect. In particular, the bone integrating external surface defines a non-bone integrating beveled surface along the facial aspect of the coronal portion of the implant body.

Abstract: Disclosed is a tamper resistant assembly of a roller or slider in a track that can be used advantageously in schools, public buildings, detention facilities and the like; wherever the potential for vandalism and mischief is likely. In the present device the track is provided with unique sloped ends which expel, up and out, any foreign material placed in the track as it is moved along by the roller or slider toward the end of the track where it would ordinarily jam.