Long-term outcome and complications of acute correction of canine antebrachial deformities with patient specific, 3-dimensional printed osteotomy and reduction guides in 15 dogs

Emmanouil Tzimtzimis^*Scott Rutherford

• frank. Pet Surgeons, Leeds, United Kingdom

Objective: To describe the owner perceived long-term outcome and complications following acute correction of antebrachial deformities in dogs using patient specific, 3D-printed osteotomy and reduction guides and internal fixation. Methods: Retrospective study of 15 dogs (20 limbs). Medical records of dogs with antebrachial deformities corrected using patient specific 3D-printed osteotomy / reduction guides and internal fixation with bone plates and a minimum of 1 year's owner follow up were reviewed. Data collected included patient and surgical details, peri-operative, short-, mid-and long-term outcome and complications. Pre-surgical planning involved Computer Aided Design (CAD) subjective segment orientation, from which patient specific osteotomy and reduction guides were created. Results: All but one (19/20) limbs had full function and one limb had acceptable function at a mean owner follow up time of 23 months. The mean long-term Liverpool Osteoarthritis in Dogs (LOAD) and Canine Orthopaedic Index (COI) scores were 4.4 and 3.5 respectively. The only minor complication was breakage of the ulnar plate (1 limb). There were two types of major (I) complications: surgical site infection (3/20 limbs, 15%) and implant-related soft tissue irritation (4/20 limbs, 20%), both of which were treated successfully with implant removal. There were no intra-operative, major (II) or catastrophic complications. Clinical Significance: Acute correction of canine antebrachial deformities aided by patient-specific, 3D-printed osteotomy and reduction guides resulted in excellent long-term outcome. Complications encountered were surgical site infection and implant-related soft tissue irritation. All complications were successfully treated.