A patient with ankylosis of the right knee was referred to our hospital. The patient was found to have had reconstructive surgery of the posterior cruciate ligament 7 months previously. He underwent manipulation and arthroscopic treatment without improvement of 40 degrees of flexion deformity. Posterior release with excision of the anterior and posterior cruciate ligament was carried out in our hospital. Calcification and ossification were found in the proximal part of the anterior cruciate ligament, which was considered to be a cause of the restriction of knee extension.
A good result was obtained by using a continuous passive motion machine and sponge traction immediately after the operation. Range of motion was from 0° to 150° of flexion one year after the surgery.
