Microsurgical Distal Thumb Reconstruction Using a Mini Wrap-around Free Flap

Kwon,  Gi Doo; Ahn,  Byung Moon; Yeo,  Yong Bum

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Original Article

Journal of the Korean Society for Surgery of the Hand 2008;17(2):101-107.
Published online November 30, 2008.

Microsurgical Distal Thumb Reconstruction Using a Mini Wrap-around Free Flap

Gi-Doo Kwon, M.D., Byung-Moon Ahn, M.D., Yong-Bum Yeo, M.D.

Department of Orthopedic Surgery, Sungmin General Hospital, Incheon, Korea. oskkd@hanmail.net

Mini Wrap-around 유리 피판술을 이용한 무지 원위부 재건술

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Abstract

Purpose: Free flaps from the great toe are an established method for reconstruction of absent or partially amputated thumbs. However, options differ as to which technique represents the ideal solution for each level of amputation. Various methods of distal thumb reconstruction have been proposed. We prefer to transplant the entire great toe nail complex with the almost all of the pulp rather than a portion of the nail. This paper reflects our experience in using the great toe mini wrap-around flap for distal thumb reconstruction.
Materials and Methods: In the period from October of 2005 to July of 2007, 9 patients were treated for traumatic thumb defects localized at the distal phalanx of the thumb. The patients included seven men and two women. The mean age was 44 years (range, 21~60) and the dominant right hand was involved in seven of nine patients.
Results: The transferred flaps have survived completely in all cases. The mean range of motion in the interphalangeal joints was 51o, with 73% of the normal uninjured opposite hands. The two-point discrimination was 10.5 mm (range, 5~13 mm). In Semmes-Weinstein monofilament test, the sensibility was 4.31 in 4 cases, 3.61 in 3 cases and 2.83 in 2 cases. The pinch power was 64% (range, 55~95%) of the opposite hand. All patients were satisfied with the appearance of the reconstructed thumb and felt comfortable at final follow-up.
Conclusion: We have successfully reconstructed 9 cases of traumatic distal thumb defects using the mini wrap-around free flap. The mini wrap-around free flap in great toe is an excellent alternative method for distal thumb reconstruction in selected patients.

Key Words: Thumb reconstruction, Mini wrap-around free flap

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