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Vet Comp Orthop Traumatol 2019; 32(03): 241-249
DOI: 10.1055/s-0039-1678701
Clinical Communication
Georg Thieme Verlag KG Stuttgart · New York

Computer-Assisted Surgery Using 3D Printed Saw Guides for Acute Correction of Antebrachial Angular Limb Deformities in Dogs

Andrew J. Worth
1   School of Veterinary Science, Massey University, Palmerston North, New Zealand
,
Katherine R. Crosse
1   School of Veterinary Science, Massey University, Palmerston North, New Zealand
,
Andrew Kersley
2   Axia Design Group Ltd, Napier, New Zealand
› Author Affiliations Funding There is no grant or other financial support to disclose. Axia Design Group discounted their professional time to aid this research.
Further Information

Publication History

02 May 2018

23 December 2018

Publication Date:
09 April 2019 (online)

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Abstract

Objective The aim of this study was to report the use of custom saw guides produced using computed tomographic imaging (CT), computer simulation and three-dimensional (3D) printing to aid surgical correction of antebrachial deformities in six dogs.

Materials and Methods Antebrachial limb deformities in four small, and two large, breed dogs (seven limbs) were surgically corrected by a radial closing wedge ostectomy and ulnar osteotomy. The location and orientation of the wedge ostectomy were determined using CT data, computer-assisted planning and production of a saw guide in plastic using a 3D printer. At surgery, the guide was clamped to the surface of the radius and used to direct the oscillating saw blade. The resultant ostectomy was closed and stabilized with a bone plate.

Results Five limbs healed without complications. One limb was re-operated due to a poorly resolved rotational component of the deformity. One limb required additional stabilisation with external fixation due to screw loosening. The owners of five dogs completed a Canine Orthopedic Index survey at a follow-up period of 37 to 81 months. The median preoperative score was 3.5 and the median postoperative score was 1, representing an overall positive effect of surgery. Radiographically, 5/7 limbs were corrected in the frontal plane (2/7 were under-corrected). Similarly, 5/7 limbs were corrected in the sagittal plane, and 2/7 were over-corrected in the sagittal place.

Conclusions Computer-aided design and rapid prototyping technologies can be used to create saw guides to simplify one-stage corrective osteotomies of the antebrachium using internal fixation in dogs. Despite the encouraging results, accurate correction of rotational deformity was problematic and this aspect requires further development.

Keywords

angular limb deformity - three-dimensional printing - rapid prototyping - saw guide - computed tomography

Author Contributions

All authors have contributed to the conception, design, acquisition of data, analysis and interpretation of data, drafting or revising, and final approval of the manuscript.


Supplementary Material

 

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