STAINSBY OPERATION FOR RHEUMATOID AND OTHER FOREFOOT ARTHROPATHIES

Abstract

Aim To assess the reliability of Stainsby’s operation for dislocated lesser toe metatarsophalangeal (MTP) joints.

Method Seventy-four patients underwent this operation between 1998–2003. Sixty-nine patients (93%) were reviewed at mean follow up of 32 months (range 10–67) post-operatively. Forty-eight patients had rheumatoid arthritis, two had psoriatic arthropathy, 19 had other causes. Ninety-four feet were reviewed, 73 had had multiple lesser toe operations, 21 had single lesser toe operations, 52 feet had surgery to the hallux. Assessments were made of pre- and post-operative pain, shoe problems, callosities, alignment and function.

Results Out of 94 feet, 89 (95%) had severe or moderate pain pre-operatively. Only 19 (20%) had significant pain at review. Pain under operated toes was relieved in 78 feet (83%). Tender plantar callosities were reduced from 76 feet pre-operatively (81%) to 31 feet (33%) at review, these mainly under un-operated metatarsal heads. Shoe problems were reduced from 89 feet (95%) pre-operatively to 61 feet (65%) at review. American Orthopaedic Foot and Ankle Society (AOFAS) forefoot scores were increased from a mean of 19 pre-operatively to 52 at review.

Residual valgus of big toe more than 25 degrees persisted in 33 feet (35%). Corrective osteotomy of 44 first metatarsals failed to prevent recurrent valgus in 16 feet (36%).

Conclusions The Stainsby operation was effective in relieving pain and skin callosities from under dislocated lesser metatarsal heads, and in reducing shoe problems but we found that varus osteotomy was unreliable in correcting valgus of the big toe. This was probably due to stretching of the repaired medial ligament.