[Effectiveness of arthroscopic debridement and release for post-traumatic arthritis of subtalar joint].

OBJECTIVE

To evaluate the effectiveness of arthroscopic debridement and release for post-traumatic arthritis of subtalar joint.

METHODS

Between January 2011 and December 2014, 14 cases of post-traumatic arthritis of the subtalar joint underwent arthroscopic debridement and release, and the clinical data were retrospectively analyzed. All patients were male, aged 42 years on average (range, 32-62 years). Calcaneus fracture was caused by falling from height; 8 cases received conservative treatment and the other 6 cases received open reduction and internal fixation. The mean interval from injury to operation was 3.4 years (range, 2-7 years). The arthroscopic debridement and release were performed through lateral portals. The injury degree of articular cartilage was classified as grade 3 in 4 cases and grade 4 in 10 cases based on Outerbridge rating. The degree of pain was assessed by visual analogue scale (VAS) and the function of joint was assessed by the American Orthopaedic Foot & Ankle Society (AOFAS) Ankle Hindfoot Scale.

RESULTS

All incisions healed by first intention and no complication occurred. The follow-up time was 18 months. Pain was relieved obviously; VAS was significantly decreased to postoperative 3.8±0.9 at 18 months from preoperative 7.7±1.2 ( =9.728, =0.000), and AOFAS Ankle Hindfoot Scale was significantly increased to postoperative 59.1±8.8 from preoperative 37.6±8.2 ( =6.688, =0.000). During follow-up, no patient was given arthrodesis and no worsened sign was found on the postoperative CT and MRI.

CONCLUSION

Arthroscopic debridement and release for post-traumatic arthritis of the subtalar joint can relieve clinical symptoms and delay subtalar arthrodesis.