Abstract
Introduction: Lesser metatarsophalangeal instability is a common cause of forefoot pain. Previous studies were small and there is little data comparing surgical with non-surgical treatment.
Patients and Methods: Metatarsophalangeal instability was diagnosed and staged with the draw test. We recorded the clinical presentation, involved toes, severity of instability, presence of toe deformity and management. Patients were followed-up in clinic or by telephone interview with visual analogue pain and satisfaction scores and AOFAS lesser metatarsophalangeal scores. Outcomes were assessed by an independent observer.
Results: We studied 154 patients: 127 (82%) female and 27 (18%) male. The median age was 56 years (range 33–85). One foot was affected in 107 patients (69%) and both feet in 47 (31%). The second toe only was affected in 99 patients (64%) and multiple toes in 52 (34%). Seventy-three patients (47%) had a complaint of generalised forefoot pain. Sixty-eight (44%) had pain and deformity localised to the second toe. Thirteen patients (8%) had toe deformity with significant MTPJ instability. 150 toes (52%) had grade 1 instability, 108 (37%) grade 2 instability and 21 (7%) grade 3 instability. Twelve toes (4%) presented dislocated with a history of instability. Ninety-nine patients (64%) were treated conservatively, using functional taping, shoe modifications, insoles and injections. Fifty-five patients (36%) had surgery, including lesser toe straightening, flexor-extensor transfer, plantar plate repair, Weil and Stainsby procedures. 79% of patients were reviewed at a mean of 65 months (range 14 to 138). Mean pain score was 31mm ± 23.7mm for the conservative group and 23mm ± 24.1mm in the surgical group. Mean AOFAS score was 69 ± 16.3 for the conservative group and 67 ± 17.8 in the surgical group. 39 (52%) conservatively treated patients were either satisfied or very satisfied compared to 31 (66%) surgically treated patients. No differences were statistically significant.
Correspondence should be addressed to: Mr Andrew H. N. Robinson, Editorial Secretary, Department of Trauma and Orthopaedics, BOX 37, Addenbrooke’s Hospital, Cambridge CB2 2QQ, England.
