Osteosynthesis of the clavicle after osteotomy in brachial plexus surgery: A biomechanical cadaver study
Materials and methods: Ten matched pairs of fresh cadaveric clavicles osteotomized through the mid-shaft obliquely were repaired with a titanium 7-hole 3.5-mm reconstruction locking plate in the superior or the anteroinferior position. The maximal failure loads and the displacement of the specimens at 166 N, 183 N, 203 N loads were recorded by the machine in 3-point cantilever bending. Bending failure stiffness was calculated between 10–150 N and 151 N to maximal bending failure loads.
Results: The mean maximal failure load was 396.2 N (SD, 117.3) for superior constructs and 220.1 N (SD, 51.1) for anteroinferior one (P < 0.05). There was significant difference in displacement between superior and anteroinferior plated specimens at 183 N (6.3 [SD, 2] vs. 9.9 [SD, 3.6]) and 203 N (6.4 [SD, 0.6] vs. 11.7 [SD, 6.6]) loads; P < 0.05). Mean bending failure stiffness between 151 N and maximal loads was 22.6 N/mm (SD, 13.2) for superior plates and 11 N/mm (SD, 9) for anteroinferior plated clavicles (P < 0.05).
Conclusions: The superior plating of obliquely osteotomized clavicles with the titanium 7-hole 3.5-mm locking reconstruction plate had a significantly greater biomechanical stability at fixed loads of 183 N and 203 N than the anteroinferior plating in the inferior directed cantilever bending. The superior plating osteosynthesis exhibited a significantly greater stiffness from 151 N to maximal bending failure loads as well.
Kontautas, E.; Gerulis, V.; Varžaitytė, L.; Vytautas Ambrozaitis, K.; Burkauskienė, A. Osteosynthesis of the clavicle after osteotomy in brachial plexus surgery: A biomechanical cadaver study. Medicina 2015, 51, 112-116.
Kontautas E, Gerulis V, Varžaitytė L, Vytautas Ambrozaitis K, Burkauskienė A. Osteosynthesis of the clavicle after osteotomy in brachial plexus surgery: A biomechanical cadaver study. Medicina. 2015; 51(2):112-116.Chicago/Turabian Style
Kontautas, Egidijus; Gerulis, Viktoras; Varžaitytė, Lina; Vytautas Ambrozaitis, Kazys; Burkauskienė, Aušra. 2015. "Osteosynthesis of the clavicle after osteotomy in brachial plexus surgery: A biomechanical cadaver study." Medicina 51, no. 2: 112-116.