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Reconstruction procedures for anterior cruciate ligament insufficiency: A computer analysis of clinical results

Columbia Orthopaedic Group, Columbia, Missouri

Donald B. Slocum, MD

Orthopaedic and Fracture Clinic, Eugene, Oregon

Robert L. Larson, MD

Orthopaedic and Fracture Clinic, Eugene, Oregon

Stanley L. James, MD

Orthopaedic and Fracture Clinic, Eugene, Oregon

Kenneth M. Singer, MD

Orthopaedic and Fracture Clinic, Eugene, Oregon

A pre- and postoperative study of 205 patients who had surgical reconstruction of the anterior cruciate lig ament (ACL) of the knee was evaluated with the use of a prototype computer program. An average followup of 4.1 years revealed a 27% improvement in subjective complaints and a 8% improvement in objective findings. The anterior drawer test was improved 25% and sub luxation of the lateral tibial plateau (ALRI) was improved 118% correlating highly (P < 0.001) with a good result. Seventy-four percent of patients had undergone medial meniscectomy, 58% lateral meniscectomy, and 41% had both menisci removed at followup after reconstruc tion. Ninety-two percent of the 121 patients responding to a final subjective complaint evaluation felt that their knee was significantly improved (average 6.1 years after reconstruction). The computer demonstrated a wide variation in the results of reconstruction within the intraarticular, extraarticular, and combined groups. The addition of associated procedures to the main recon structive procedure significantly affected the results. This study reveals improvement of subjective com plaints and objective findings after reconstructing the anterior cruciate ligament and proposes the use of computer analysis for specific evaluation of different procedures.

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