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Rosenberg devised a method to use Endobuttons (Acufex Microsurgical Inc. Mansfield, MA) for femoral fixation in ACL reconstruction.80 cases underwent arthroscopic anterior cruciate ligament (ACL) reconstruction using the Endobuttons from April 1997. There were 41 males and 39 females, whose ages ranged from 15 to 50 years (average 24.6 years). Our substitute was bone-patellar tendon-bone autogenous. Artificial ligament was anchored at the tibial side with a post screw.Based on these experiences, we reviewed the demerits of this procedure. The clinical results showed that the Endobutton, used for ACL endoscopic fixation, flips outside the extensor mechanism or vastus lateralis rather than flipping directly outside the lateral femoral cortex.We also found out one case in which the Endobutton dragged into the femoral tunnel during X-rays after operation.The purpose of this study was to estimate the cause of the demerits and improve the method.

The short-term results of 62 knees in 55 patients with osteoarthritis treated by Prolix total knee arthroplasty were evaluated clinically and radiologically. The average age was 74.0 years (range; 60-89 years) at the time of surgery. The follow-up period was an average of 21 months (range: 6-38 months).The mean JOA knee rating score improved from 46.1 to 74.8 points. The mean FTA improved from 186.1° to 172.0°. The mean range of motion went from 101.8° preoperatively to 99.3° postoperatively.There were no significant complications (infection, DVT), patellofemoral disorders, and loosening or sinking radiographically. The short term results of the Prolix system were good.