Laxity in posterior cruciate sparing and posterior stabilized total knee prostheses.

Two series of consecutive total knee replacements were compared retrospectively: 118 HLS II posterior stabilized prostheses (Group 1) versus 138 HLS CP posterior cruciate ligament sparing prostheses (Group 2). Both implants were made by the same manufacturer. The prostheses had been inserted between 1989 and 1992.

[The recent history of substitution procedures for the anterior cruciate ligament].

The evolution of operations to repair or substitute the anterior cruciate ligament is summarized for the period 1903 to the present. The increase in the understanding of the function of the ligament is described and in the light of this experience a programme for the management of these lesions is suggested. In acute lesions in a young sportsman the loss of the stability provided by the central pivot prevents competition at high level and operation to repair, substitute, or reinforce the ligament is recommended.