Abstract
Purpose of the study: Basal joint osteoarthritis remains one of the most invalidating degenerative diseases of the upper limb. Most patients are women and the main symptom is pain. Several surgical approaches can be used: total trapeziectomy with or without a ligament reconstruction for intermetacarpal stabilization associated or not with tendon interposition (possibly with a synthetic insert); cemented or non-cemented trapezio-metacarpal prosthesis and arthrodesis. The purpose of this work was to report our experience with the modified Eaton-Littler technique and determine the current contribution of total trapeziectomy – ligament reconstruction – tendon interposition.
Material and methods: We report a series of 26 patients who underwent surgery between 1994 and 2002 for trapezium resection associated with intercarpal ligamentoplasty and «anchovy» interposition using a flexor carpi radialis hemi-tendon. The series involved 21 patients, 16 women and 5 men, with invalidating basal joint osteoarthritis unresponsive to medical treatment. The Dell classification was stage II and III. Mean age was 58.6 years. Five patients underwent surgery on both wrists. One patient had had a prior operation on one side and a Swanson implant on the other. The mean follow-up was 66.1 months (range 25–131 months).
Results: For these 22 cases, outcome at last follow-up was satisfactory with complete resolution of pain, excellent joint mobility with a mean Kapandji score of 9.5/10 (range 8–10). Half of the wrists exhibited deficient pinch and grasp force. Mean postoperative force was 20 kg (range 8–28 kg). Radiographically, scaphometacarpal collapse was nearly complete in all cases. For four cases, outcome was considered poor because of nearly constant pain with reduced mobility and a mean Kapandji score of 5/10. Three patients developed a reflux dystrophy: one of these patients achieved a final satisfactory result. There had been no revisions at last follow-up.
Discussion: All the proposed techniques appear to give good results in terms of pain relief. Trapiezectomy with ligamentoplasty appears to provide good results at mean six months follow-up, results which are reliable and sustained over time. Trapezio-metacarpal prostheses give good immediate results in selected patients but the rate of failure at mid-term remains high, mainly due to loosening. Second generation cemented prostheses are promising. Trapezial implants have specific complications. Trapeiometacarpal arthrodesis gives good stability of the thumb column and is particularly indicated for young active patients with less consideration on the esthetic aspect of their hand, keeping in mind the significant rate of nonunions.
Conclusion: Despite the significant progress achieved with trapeziometacarpal prosthetic arthroplaasty, we still believe that complete resection of the trapezium with ligament reconstruction associated with tendon interposition remains the gold standard in terms of patient satisfaction and reliable results for the surgical treatment of basal joint osteoarthritis.
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