AI Article Synopsis
- The study aimed to evaluate the biomechanical performance of using 7.5mm cannulated screws in an inverted triangle setup for fixing Pauwels type III femoral neck fractures in synthetic bones compared to a control group.
- Ten synthetic bones were split into a test group (with screws) and a control group (no screws), analyzing fixation resistance and rotational deviation under various displacement conditions.
- Results indicated that the test group's fixation showed significantly lower mechanical strength compared to the control group, with notable differences in displacement resistance and rotational deviation measurements.
Article Abstract
Objective: To analyze the results of biomechanical assays of fixation of Pauwels type III femoral neck fracture in synthetic bone, using 7.5mm cannulated screws in inverted triangle formation, in relation to the control group.
Methods: TEN SYNTHETIC BONES WERE USED, FROM A DOMESTIC BRAND, DIVIDED INTO TWO GROUPS: test and control. In the test group, a 70° tilt osteotomy of the femoral neck was fixated using three cannulated screws in inverted triangle formation. The resistance of this fixation and its rotational deviation were analyzed at 5mm displacement (phase 1) and 10mm displacement (phase 2). The control group was tested in its integrity until the fracture of the femoral neck occurred. The Mann-Whitney test was used for group analysis and comparison.
Results: The values in the test group in phase 1, in samples 1-5, showed a mean of 579N and SD =77N. Rotational deviations showed a mean of 3.33°, SD = 2.63°. In phase 2, the mean was 696N and SD =106N. The values of the maximum load in the control group had a mean of 1329N and SD=177N.
Conclusion: The analysis of mechanical strength between the groups determined a statistically significant lower value in the test group. Level of Evidence III, Control Case.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4167045 | PMC |
| http://dx.doi.org/10.1590/1413-78522014220400917 | DOI Listing |
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