Patent ID: 7896882
Filing Date: 2011-03-01
Classification: A61B

Abstract:
1. A positioning block assembly for use in knee replacement surgery comprising: a surgical tool guide block and a platform engaged to a guide body portion of the positioning block, the surgical tool guide block being slidingly displaceable along the platform, the surgical tool guide block having one of a rack and a pawl of a rack and pawl mechanism and the platform having the other of the rack and the pawl, and the surgical tool guide block having a transversely extending socket receiving a plunger therein, the plunger having said one of a rack and a pawl thereon; an elastically deflectable blade spring disposed on the surgical tool guide block, the blade spring biasing one of the rack and the pawl such that they are normally engaged together, wherein the surgical tool guide block is slidingly displaceable on the platform when the rack and pawl are disengaged, and fixed relative to each other when the rack and pawl are in engagement; and the surgical tool guide block and the platform having substantially seamless surfaces that are at least one of substantially exposed and exposable, such that the surfaces can be pressure cleaned and autoclaved to remove biological matter therefrom.