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A unique case of anterior knee pain in an active adolescent is described: a periosteal sleeve avulsion and quadriceps rupture in a young basketball player. The trauma mechanism was without any direct trauma on the knee. A review of overuse-related anterior knee pain in the young and active is presented. A quadriceps rupture with a periosteal sleeve avulsion fracture in an active adolescent is very rare. To our knowledge there are no similar cases described. This article presents a case of a 14-year-old adolescent boy who sustained a quadriceps rupture with a periosteal sleeve avulsion.

Aim: Sterilization of impression materials is of paramount importance. The present study was conducted to compare the effect of different disinfectants on dimensional accuracy of elastomeric impression materials used for implant prosthesis and other routine treatments. Materials and Methods: The present study was conducted with polyvinyl siloxane (PVS) (regular body), PVS (medium body), PVS (heavy body), and polyether (medium body) impression materials. Glutaraldehyde (2%) and sodium hypochlorite (NaOCl, 0.525%) were the disinfectant solutions employed in the study. After 16 h, the specimens were measured under Leica WILD stereomicroscope and dimensions were compared with master die. Results: The dimensional change in the Controls, 2% glutaraldehyde (Group I), and 0.525% NaOCl (Group II) was non significant where as Group III and Group IV showed statistically significant difference (P < 0.05). Results also showed significantly higher tear strength (newton/millimeter) in Control group followed by Group I and Group II. Conclusion: PVS (heavy body) was found to be most stable, and polyether was seen to be stable of all the impression materials.