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Mallet Fractures of the Thumb Compared to Mallet Fractures of the Fingers
Kamilcan Oflazoglu, MD1; Ali Moradi, MD1; Yvonne Braun, MD1; David Ring, MD, PhD2; Neal Chen, MD1; Kyle R Eberlin, MD1
1Massachusetts General Hospital, Harvard University, Boston, MA, 2Dell Medical School, Austin, TX
Purpose: To look for differences in mechanism, radiographic findings, and treatment between mallet fracture of the thumb and mallet fracture of the index through small fingers.
Methods: This retrospective study included 24 mallet fractures of the thumb and 392 mallet fractures of other digits. We compared demographics, injury factors (side, dominant hand, time between injury and first visit, and injury mechanism), subluxation, fragment size, treatment, and time from injury to final evaluation between the two groups.
Results: Mallet fractures of the thumb presented for treatment sooner after injury (2.9 vs. 13 days on average), had less fragment displacement (27% vs. 33%), and less articular involvement (39% vs. 46%, on average). None of the mallet fractures of the thumb had radiographic evidence of subluxation while 25% of mallet fractures of other fingers had initial or later subluxation
Conclusion: Mallet fractures of the thumb are not likely to subluxate.
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