Use of a Customized Device for Correction of Antebrachial Angular Deformity in a Dog

Abstract

Angular deformity is a common condition in dogs that can cause serious malformations and is a challenge for surgeons to correct. A 15-monthold male Saint Bernard was evaluated due toright foreleg lameness. Orthopedic examination revealed a valgus deformity with external rotation and anteversion of the forelimb. Carpal examination revealedthe decreased range of motion with slight disturbances in carpal flexion. Radiography of both forelimbs showed angular deviation because of possible premature physeal closure of the distal ulnar growth plate.Surgical intervention was selected to correct the angular deformity. A closed-wedge osteotomy was planned using 3D reconstruction, obtained via computed tomography (CT). In order to accomplish this, a custom-made device was developed to aid the surgeon in establishing the position and orientation of the cutting planes during the intervention.Long-term follow-up obtained 3 years after surgery revealed the correct ossification of the osteotomy and complete resolution of lameness. The main advantages of using a customized device obtained from 3D CT include the predictability and accuracy of the method. The device allows for correction of atriple-axis angular long bone deviation, with full opposition between the bone fragments after osteotomy and minor loss of length of the limb.