Single‐cut osteotomy for correction of a complex multiplanar deformity of the radius in a Shetland pony foal

Abstract

To describe the surgical correction of a multiplanar deformity of the radius in a pony using a single-cut osteotomy. Study design: Case report.Animals: A 9-week-old male Shetland pony foal with a bodyweight of 47 kg. Methods:The foal presented with a complex multiplanar deformity of the right radius. A 3-dimensional model of the bone was created based on computed tomography (CT) imaging. To correct the deformity, the cutting plane for a single-cut osteotomy was calculated following the mathematical approach described by Sangeorzan et al. After osteotomy, the bone was realigned and stabilized with two 4.5 locking compression plates (LCPs).Results: Recovery from surgery was uneventful, and the foal remained comfortable. A CT exam 15 weeks after surgery revealed that diaphyseal deformities improved substantially in procurvatum (from 8 to 1 ), varus (from 27 to 0 ), and rotation (30 to 5 ). The operated radius was 2.1 cm shorter than the left. Eighteenmonth follow up confirmed a functionally and cosmetically acceptable outcome. Conclusion:The single-cut osteotomy resulted in the successful correction of a multiplanar equine long-bone deformity with a favorable outcome in a Shetland pony.Clinical significance: Single-cut osteotomy is an alternative surgical technique for the correction of complex diaphyseal long-bone equine deformities.Computed tomography data and the possibility of printing 3D models provides a significant advantage for rehearsing the procedure and for evaluating the correction that was achieved.

Displacement osteotomies/ostectomies in the horse

“…On these models, the exact displacement OE/OO can be practiced hands-on and is nowadays strongly recommended in human surgery (Franklin et al 2017;Kwun et al 2017;Winer et al 2017;Lau et al 2018). Recently, reports of using this technique in veterinary medicine have been published (Radtke et al 2017;Oaxley 2018;Lindt et al 2022;Schweinsberg et al 2021).…”

“…Being able to rehearse the actual correction results in a shorter surgery time and increased accuracy (Lindt et al 2022) and aids in the selection of the best implants, especially for more complex and multiplanar osteotomies (Lau et al 2018;Schweinsberg et al 2021).…”

“…This multidirectional deformity affects all three planes (sagittal, frontal and transverse) and is best corrected with a single cut osteotomy (Schweinsberger et al . 2021). The final group involves angular limb deformities caused by partial collapse of a joint region affected by chronic degenerative disease and continuous overload (Bramlage and Auer 2006).…”

“…2022; Schweinsberg et al . 2021). Being able to rehearse the actual correction results in a shorter surgery time and increased accuracy (Lindt et al .…”