In vitro comparison of linear vs triangular screw configuration to stabilize complete uniarticular parasagittal fractures of the proximal phalanx in horses

• DOI: 10.1111/vsu.13123
• Publication Date: 2018-11-07T13:35:18Z
• Authors: Raphael Labens; Nurul H. Khairuddin; Mark Murray; Kieri Jermyn; Roohi S. Ahmad
• Keywords: Phalanx

Abstract Objective To assess fracture gap reduction and stability of linear vs triangular 4.5‐mm lag screw repair experimental, uniarticular, complete forelimb proximal phalanx (P1) fractures. Study design Experimental. Sample population Fourteen equine cadaver limbs/horses. Methods Simulated fractures were repaired with 2 screws under 4‐Nm insertion torque (linear repair). Computed tomography (CT) imaging was performed the leg unloaded loaded to forces generated while walking. The revised include 3 placed same (triangular repair) prior CT. width assessed qualitatively by observers graded on basis measurements relative average voxel size at dorsal, mid, palmar P1 sites. Interobserver agreement Cohen's κ. effect type, loading condition, measurement site grades evaluated using Kendall's τ‐b correlation coefficients paired nonparametric tests. Significance set P ≤ .05. Results Agreement between widening fair in (κ = 0.53) excellent 0.81) repairs. Loading resulted distraction repairs (P .008). Triangular reduced better irrespective .003; < .001). type not correlated mid dorsal Conclusion Repair uniarticular parasagittal a configuration improved vitro stability. Clinical significance likely improves biomechanical conditions during postoperative weight bearing.