Abstract
Two alpaca crias and one 14-month-old alpaca were referred for treatment of bilateral carpal valgus. In one cria, hemi-circumferential periosteal transection and elevation combined with an ulna osteotomy was performed initially without success, however transphyseal bridging with screws and wires was used successfully in both crias to straighten the limbs. As the distal radial and ulna growth plates had closed in the 14-month-old alpaca, bilateral wedge ostectomies of the distal radius and transfixation casts were used to straighten and stabilise the limbs. The ostectomy sites healed and the alpaca is ambulatory, although carpal flexion is significantly reduced. Until the relationship between the growth rate of crias and the success of hemicircumferential periosteal transection and elevation and ulna osteotomy is established, transphyseal bridging may provide a more reliable result in crias with carpal valgus deformity and open physes. Wedge ostectomy and application of a transfixation cast can be used to correct severe carpal valgus deformities in alpacas with closed physes.
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