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Journal of the Korean Society for Surgery of the Hand 2005;10(4):227-233.
Published online December 1, 2005.
Treatment of Bony Mallet Finger with Extension Block Technique
Soo Bong Hahn, Sung Hun Kim, Sang Hoon Park, Ho Jung Kang
신전 제한법을 이용한 골성 추지의 치료
한수봉, 김성훈, 박상훈, 강호정
To evaluate results of extension block technique for bony mallet finger. Materials and Methods: Between March 2002 and March 2005, twenty one patients who received extension block surgery for bony mallet finger were included in this study. Time from injury to operation, extent of joint involvement, subluxation of distal interphalangeal (DIP) joint, time from surgery to K-wire removal, range of motion, complications and patient subjective satisfaction at final follow up were surveyed. Results: The objective results were evaluated with Crawford's method which assess extension, flexion and pain. Out of 21 patients, 7 were excellent, 11 good, 2 fair and 1 poor. Regarding to subjective satisfaction, 17 patients showed excellent or good, 2 fair and 2 poor results. K-wire was removed at an average of 40 days after surgery. Average DIP motion was 66 degrees, and average loss of extension was 7 degrees. Bone union was achieved in all cases. The fair and poor results were related to improper position of K-wire. Conclusion: Extension block technique for the treatment of bony mallet finger is a less invasive and useful treatment modality in patients who have greater than one-third involvement of the joint surface, failure of reduction, and distal joint subluxation.

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