Abstract

A novel canine tibial plateau leveling osteotomy (TPLO) fixation device was recently developed with design features such as titanium alloy (TA) material, distal monocortical screw fixation, and a point contact undersurface specifically targeted to reduce surgical site infection rates by ensuring tissue perfusion under the plate. The strength of the novel TPLO construct was compared with that of a predicate stainless steel (SS) locking plate construct with bicortical screws in 16 paired cadaveric canine limbs. The mean loads to failure were 716.71 ± 109.50 N (range 455.69–839.69 N) and 629.50 ± 176.83 N (range 272.58–856.18 N) in the TA and SS groups, respectively. The average ratio of the loads to failure of the paired specimens was 1.18 (p = 0.031). No failure of the TA constructs involved the distal fixation with monocortical screws. Substantial mechanical equivalence of this novel TA monocortical/bicortical fixation construct to an established SS bicortical screw fixation construct is demonstrated. Clinical investigation of potential merits of this novel TA, monocortical/bicortical locking screw/plate system is now warranted.

Highlights

  • Rupture of the cranial cruciate ligament (CCL) is a common cause of hindlimb lameness and stifle osteoarthritis (OA) in dogs

  • Our results rejected the hypothesis that there would be no difference in load to failure between the two fixation devices

  • No failure of the titanium alloy (TA) constructs involved the distal fixation with monocortical screws

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Summary

Introduction

Rupture of the cranial cruciate ligament (CCL) is a common cause of hindlimb lameness and stifle osteoarthritis (OA) in dogs. Tibial plateau leveling osteotomy (TPLO) is one of the most commonly performed procedures for the stabilization of cranial cruciate ligament deficient stifles in dogs [3]. Surgical site infection (SSI) is one of the most common complications after TPLO [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18]. Few of the TPLO fixation devices to date have sought to reduce surgical site infection (SSI) rates [4]. A novel TPLO fixation device was recently developed

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