| Autor: |
Andrew Pytiak, Xin Jin, Zlatan Cizmic, Austen Washington, Rahul Vaidya |
| Rok vydání: |
2020 |
| DOI: |
10.21203/rs.3.rs-94004/v1 |
| Popis: |
Background: External fixators that span the wrist have been the historical norm in treating distal radius fractures. We have modified a dorsal distraction approach by using a subcutaneously applied locked bridge plate through 2 small incisions superficial to the extensor tendons and outside the extensor compartment. The purpose of this study was to biomechanically evaluate this modified method of fixation for comminuted distal radius fractures in comparison with two established constructs. Methods: Matched cadaver specimens were used to model an AO Type 23-C3 distal radius fracture. Biochemical testing for stiffness during axial compressive loading was done on three constructs: a conventional Burke distraction plate, the subcutaneous internal fixation plating technique and an external fixator. All specimens were cyclically loaded for 3000 cycles and then retested. Results: The modified construct was found to be stiffer than the external fixator (p=0.013). When compared to the Burke plate, the modified construct was significantly less stiff before axial cycling (p=0.025). However, the difference was not maintained after cycling and the post-axial loading stiffness difference was non-significant (p=0.456).Conclusion: Our data demonstrate the biomechanical integrity of the subcutaneous plating technique for the fixation of comminuted distal radius fractures. It is stiffer than an external fixator and has the theoretical advantage of avoiding pin-tract infections. In addition, it is subcutaneous, and not a cumbersome external construct. Our construct is minimally invasive and does not violate the dorsal extensor compartments allowing movement of the fingers while the construct is in place. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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