Mini-hook plate fixation for small avulsion fractures around
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Mini-hook plate has been described for the treatment of various small avulsion fragments in the hand that shows significantly positive outcomes. This retrospective study aimed to evaluate clinical outcomes after mini-hook plate fixation in patients with an avulsion fracture around the interphalangeal or metacarpophalangeal joints of the hand.

19 patients with avulsion fractures around the interphalangeal or metacarpophalangeal joints of the hand were included in this study. 7 patients had a mallet fracture, and 12 patients had other phalangeal avulsion fractures including central slip, collateral ligament, volar plate, and flexor avulsion fractures. The osseous union and functional outcomes, including finger joint motion, joint stability, pinching strength, and the disabilities of the arm, shoulder, and hand score, were evaluated.

Results:
The mean duration of follow-up was 33.8 months.

--All patients in mallet and other phalangeal avulsion fractures achieved osseous union between the avulsion fragment and phalangeal bone, and there was no joint subluxation.

--There were no significant differences in the disabilities of the arm, shoulder, and hand scores.

--However, the patients with mallet fracture have lower mean percentage values of the total active range of motion and pinching strength than other phalangeal avulsion fractures.

--Researchers abandoned this procedure in mallet fractures because the early results after mini-hook plate fixation in mallet fractures appeared unfavorable.

These findings indicate that in patients with phalangeal avulsion fractures, the mini-hook plate fixation may provide adequate stabilization and good clinical outcomes. Mallet fractures, on the other hand, did not have the same success rate as other phalangeal avulsion fractures.

Source: https://josr-online.biomedcentral.com/articles/10.1186/s13018-021-02339-z
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