The Die Punch Fragment: Analysis of Fragment Geometry and Need for Fixation

Area of Science:

• Orthopedic Surgery
• Radiology
• Trauma Surgery

Background:

• Die punch (DP) fragments are common in distal radius fractures (DRFs) and can lead to loss of reduction after volar locked plating.
• The optimal surgical approach for DP fragments remains a consideration in DRF management.

Purpose of the Study:

• To determine the incidence of computed tomography (CT)-confirmed DP fragments treated with open reduction and internal fixation (ORIF) via a dorsal approach.
• To measure the radioulnar length of DP fragments relative to the distal radioulnar joint (DRUJ) length.
• To assess the association between DP fragment length and the choice of volar versus dorsal surgical approach.

Main Methods:

• Retrospective review of preoperative CT scans from 94 skeletally mature patients with DP fragments.
• Measurement of DP fragment length relative to total DRUJ length.
• Analysis of patient demographics, injury patterns (89% AO type C), and surgical treatment.

Main Results:

• 14% (13/94) of patients with DRFs and DP fragments underwent ORIF using a separate dorsal incision.
• The mean DP fragment length proportion relative to the DRUJ length was 0.51 ± 0.19.
• No significant association was found between DP fragment length and the decision to use a volar or dorsal approach.

Conclusions:

• DP fragment size is not a predictive factor for selecting a dorsal surgical approach in DRF fixation.
• Current surgical decision-making for DP fragments in DRFs may not need to be guided by fragment size alone.