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Abstract Number: 2127

Recurrences Of Hallux Valgus Deformity After Implant Surgery For Greater Toe In Rheumatoid Arthritis

Yuichi Mochida1, Katsushi Ishii1, Yuji Yamada1, Naoto Mitsugi2 and Tomoyuki Saito3, 1Center for Rheumatic Diseases, Yokohama City University Medical Center, Yokohama, Japan, 2Orthopaedic Surgery, Yokohama City University Medical Center, Yokohama, Japan, 3Orthopaedic Surgery, Yokohama City University School of Medicine, Yokohama, Japan

Meeting: 2013 ACR/ARHP Annual Meeting

Keywords: foot disorders, rheumatoid arthritis, treatment and surgery

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Session Information

Session Title: Orthopedics, Low Back Pain and Rehabilitation

Session Type: Abstract Submissions (ACR)

Background/Purpose: In advanced cases of rheumatoid arthritis (RA), Swanson implant have been widely usedfor hallux valgus deformity. Although the results for this surgery were acceptable, relatively high incidence of recurrence of hallux valgus deformity were reported. In this study, we analyzed the incidence of the recurrence of hallux valgus deformity after Swanson implant, then analyzed for the factors which affect the recurrence of the hallux valgus.

Methods: Post-operative radiological results of implant surgery for hallux in RA with the minimum follow-up of 12 months after surgery were analyzed in 54 cases, 87 joints (male 3cases, female 51cases). The mean age at the time of surgery was 67.7 ± 6.9 years (53~84). The mean duration after surgery was 40.8 ± 21.6 months (12~93). Post-operative hallux valgus angle (HVA) were analyzed at pre-, immediate after surgery, 6 months after surgery, and final follow-up. The changes of HVA between immediate after surgery and the final follow-up were calculated. The radiological results were evaluated using modified Granberry’s grading. The toe lengths of hallux including soft tissue shadow after surgery were divided into three groups using the radiographical of each toe as follows; Type 1 (hallux length is 3 mm longer than 2nd toe length), Type 3 (hallux length is 3 mm shorter than 2nd toe length), and Type 2 (hallux length is within 3 mm of 2ndtoe length).

Results: The averaged HVA was significantly decreased after surgery, and maintained during follow-up period. There were no statistical correlation between the changes of HVA and follow-up period, pre-operative HVA, and HVA at immediate after surgery. For the toe lengths of hallux, 24 cases were Type 1, 20 cases were Type 2, and 11 cases were Type 3. Type 3 showed significantly less changes of HVA when compared to Type 1. Also, with the shortening of the length of hallux by toe lengths type, the HVA at the final follow-up was significantly decreased. There were no relationship between HVA and Granberry’s grading.

Conclusion: Improvement of disease activity of RA, essentially due to introduction of methotrexate and biological agents, total number of RA surgery, especially for large joints has been decreasing. In contrast, the number of surgeries for small joints such as finger and toe arthroplasty are increasing. Based on this recent trend of changes of surgery, better clinical and radiological results for small joints will be needed to improve patients’ quality of life. Our result clearly showed that the shorter the lengths of hallux, significantly less changes of HVA and HVA at the final follow-up, that may reflect better surgical results of hallux valgus deformity.


Disclosure:

Y. Mochida,
None;

K. Ishii,
None;

Y. Yamada,
None;

N. Mitsugi,
None;

T. Saito,
None.

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