Partial and total knee joint prostheses are designed to transmit loads and allow movement under high-stress conditions. They are intended to replace anatomical structures and provide structure and function to provide as closely as possible the attributes of the normal natural joint. The structure and functions required in a specific implant depend on the amount of anatomical structure or function which is attenuated or absent, and a system of classification of the attributes of various types of the implant is presented.
Many different designs of knee joint prostheses are used all over the world and ISO 7207 gives a comprehensive description of the most common knee joint prostheses in accordance with this detailed classification system, the definition of components, and the designation of dimensions. These classifications assist the surgeon in the selection of the appropriate implant for a specific case.
BS ISO 7207 consists of the following parts, under the general title Implants for surgery. Components for partial and total knee joint prostheses:
Part 1: Classification, definitions, and designation of dimensions
Part 2: Articulating surfaces made of metal, ceramic, and plastics materials
Part 1 of BS ISO 7207 classifies femoral, tibial, and patellar components for knee joint prostheses in which the bearing surfaces of one or more compartments of the knee are replaced. It also gives definitions of components and the designation of dimensions.
BS ISO 7207-1:2007 replaces BS 7251-2:1995, ISO 7207-1:1994, which is withdrawn.
