Biomechanical Evaluation of Four Methods for Internal Fixation of Comminuted Subtrochanteric Fractures
| Autor: | Jianxiong Ma, Xinlong Ma, Hao-bo Jia, Yang Yang, Yang Chen, Wang Jie |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment medicine.disease_cause Weight-bearing Weight-Bearing 03 medical and health sciences Femoral head Fixation (surgical) Fracture Fixation Internal Random Allocation 0302 clinical medicine Quality Improvement Study Medicine Internal fixation Subtrochanteric Fractures Humans Fractures Comminuted Aged Orthodontics 030222 orthopedics Test setup Hip business.industry Hip Fractures 030208 emergency & critical care medicine Femur Head General Medicine Middle Aged Internal Fixators Surgery Biomechanical Phenomena Equipment Failure Analysis medicine.anatomical_structure Treatment Outcome Lesser Trochanter Peak load business Research Article |
| Zdroj: | Medicine |
| ISSN: | 1536-5964 |
| Popis: | Subtrochanteric fractures are common and result in significant morbidity and mortality. Various kinds of implants have been used to fix it. The aim of this study was to compare the biomechanical performance of PFN, DHS, DCS, and the PFLP in the treatment of subtrochanteric comminuted fractures. A total of 32 antiseptic human femurs from 16 donors were randomly allocated to 4 groups for fixation with PFN, DHS, DCS, and PFLP. A 2-cm cylindrical bone fragment was removed 1 cm below the lesser trochanter to simulate OTA/AO 32-C3.2 post instrumentation fracture. All specimens in single-leg stance situation were preloaded 5 times at 100 N in the axial direction to eliminate the time effect of relaxation and settling, followed by cyclic testing at a rate of 1 Hz with stepwise increasing load. Keeping the valley load at a constant level of 100 N during the entire cyclic test, the peak load, starting at 200 N, was increased by 100 N at 300-cycle steps until a maximum of 1500 cycles or until failure of the bone-implant construct occurred. Each specimen was kept unloaded under 100 N compression for 30 minutes between the 300-cycle steps. Femoral head displacement after 1500 cycles was 1.09 mm ± 0.13 for PFN, 1.78 mm ± 0.25 for DHS, 2.63 mm ± 0.46 for DCS, and 2.26 mm ± 0.16 for PFLP, with significant difference between any 2 implants (P |
| Databáze: | OpenAIRE |
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