Radiolunate fusion in the rheumatoid wrist with Shapiro staples: clinical and radiological results of 22 cases

[Surgery for inflammatory rheumatic joint destruction]

Orthopaedic and traumatologic involvement in patients with rheumatic diseases require extensive knowledge of these immunologically impairing illnesses. This concerns both the handling of medication and conservative treatment. The destructive processes of the joints and the spine follow established pathways. Various operating procedures are helpful depending on the stage of articular destruction. The special features of the entire perioperative management of affected persons has to be observed. Soft tissue surgical interventions are followed by arthrodesis or arthroplasty in later courses of destruction. In Germany, the orthopaedic rheumatologist specializes in the conservative and surgical treatment of inflammatory systemic diseases. Audited centres for operative interventions of the German Society for Orthopaedic Rheumatology (DGORh) seem to be the best fit for this purpose.

Rotational stability for intercarpal fixation is enhanced by a 4-tine staple

PURPOSE

To compare the torsional stability of 6 fixation techniques for intercarpal fixation including a 4-tine, in-line staple.

METHODS

We chose the scapholunate interval as the test site for rotational stability for various constructs. We used 42 pairs of embalmed scaphoids and lunates for the comparisons and created 6 construct groups. Fixation of the scapholunate gap was performed with a 3-mm screw, 2 1.1-mm (0.045-inch) K-wires spaced 2 mm apart, or 2 1.1-mm K-wires spaced 5 mm apart. One member of each pair was fixed with either a standard 2-tine peripherally placed staple or a customized 4-tine staple. Each scapholunate construct was tested in torsion to failure on a biaxial materials testing machine.

RESULTS

In all cases, the 4-tine staple significantly increased rotational stability. The 2-tine staple resulted in statistically insignificant increases in rotational stability. With central fixation alone, K-wires separated by 5 mm showed the greatest resistance to torsion, and the 3-mm screw showed the least.

CONCLUSIONS

Use of an in-line, 4-tine staple provided increased rotational stability and may result in enhanced healing of intercarpal ligamentous reconstructions and arthrodeses.

CLINICAL RELEVANCE

A 4-tine staple compared with a standard staple provided superior rotational stability for intercarpal fixation.

Clinical and radiological results of radiolunate arthrodesis for rheumatoid arthritis: 22 wrists followed for an average of 7 years

PURPOSE

To evaluate the clinical and radiological results of radiolunate (RL) arthrodesis for rheumatoid arthritis (RA) patients treated with disease-modifying antirheumatic drugs and/or biologicals with an average of 7 years of follow-up. In addition, we compared the results in advanced stages with those in less advanced stages in patients with comparatively low disease activity of RA.

METHODS

This study included RL arthrodesis for 22 wrists in 19 patients with comparatively low disease activity of RA. The mean follow-up period was 7 years (range, 2-16 y). Fourteen wrists with Larsen classification grade III and 8 wrists with grade IV were included in this study. The range of motion was calculated, and clinical scores were graded using the Mayo wrist score and the Stanley classification. The carpal height ratio (CHR) and ulnar translation (UT) were determined from the radiographs.

RESULTS

All wrists achieved radiographic fusion. Clinical scores were markedly improved, although there was a decrease in flexion. The Larsen grade did not deteriorate during follow-up. CHR and UT improved immediately after operation and remained good through the final follow-up. Although the flexion/extension range of motion of the grade IV wrists was smaller than that of the grade III wrists at follow-up, both groups obtained good clinical results.

CONCLUSIONS

Our results for RL arthrodesis were clinically and radiologically better than those of previous reports. Control of the disease activity of RA could theoretically be a factor in obtaining good long-term clinical and radiographic outcomes. RL arthrodesis is our recommended procedure for the RA wrist even in the advanced stage.

LEVEL OF EVIDENCE

Therapeutic IV.

Radio-lunate arthrodesis in rheumatoid arthritis: outcome and techniques

BACKGROUND AND PURPOSE

The wrist is one of the most affected joints in rheumatoid arthritis. The purpose of this retrospective study was to assess clinical, functional and radiographic results of radio-lunate arthrodesis. Two different operation and fixation techniques are compared and detailed outcome after this intervention is presented.

METHODS

Twenty-seven patients with long-standing rheumatoid arthritis were operated on, either by stabilisation of the arthrodesis with Shapiro staples (n = 14) or by Herbert screw (n = 13) and followed for a mean of 5.4 years.

RESULTS

Radio-lunate arthrodesis resulted in high overall and subjective satisfaction concerning function, grip and return to work. Grip strength was 35 kPa for the dominant and 26 kPa for the non-dominant hand. No revision, pseudoarthrosis or hardware failure was observed; only two conservatively treated wound healing problems were reported. The procedure resulted in a mean flexion of 26° and a mean extension of 24°; a clear improvement was also seen in activities of daily life. No difference between both groups was observed for pain, complication rate or functional outcome.

INTERPRETATION

Due to high patient satisfaction and functional outcome, radio-lunate wrist arthrodesis can be recommended independent of fixation method.