[Preliminary study on treating patellar instability guided by arthroscopy].

OBJECTIVE

To explore the operation method in treating patellar instability guided by arthroscopy and to evaluate its therapeutic effects.

METHODS

Thirty-two patients (34 knees) with patellar instability including 2 patellar tilt (2 knees), 26 (27 knees) patellar subluxation, and 4 (5 knees) patellar dislocation, diagnosed by clinical and arthroscopical standard, were treated with anterior transfer of the gracilis or medial transfer of the tibial tuberosity based on the lateral retinacular release and medial tightening.

RESULTS

Twenty-eight patients were followed up for 5-87 (mean 36.6) months. The excellence rates was 92.8%.

CONCLUSION

The patellofemoral alignment can be seen directly and dynamically under the arthroscopy. The combinational treatment including anterior transfer of the gracilis in repairing patellar instability can avoid the recurrence effectively and get satisfactory results.