Biomechanical Comparison of Two Ludloff Metatarsal Osteotomy Fixations: Compression Screws vs. Locking Plate
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چکیده
BACKGROUND: Ludloff osteotomy fixation with compression screws has been widely used in the treatment of Hallux Valgus deformities [1, 2]. Generally six weeks of non-weight-bearing is required postoperatively to allow bone union. Besides the significant inconvenience due to non-weight-bearing, noncompliance may induce malunion, nonunion and loss of correction, indicating screw fixation is not strong enough for early weight-bearing. This scenario is worse when patients have poor bone quality [3]. The locking plate is a relatively new fixation method and is believed to have better mechanical stability with a potential of early weight-bearing and less correlation with bone quality. However, there is no study proving its advantages over the screw fixation. In this study, we investigated the biomechanical properties of a locking plate fixation and a compression screw fixation. The hypotheses were: 1. locking plate fixation is more mechanically stable than screw fixation; 2. locking plate fixation correlates less to bone mineral density (BMD) than screw fixation.
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