RYAN S. CARPENTER, DVM, LAURIE R. GOODRICH, DVM, PhD, Diplomate ACVS, GARY M. BAXTER, VMD, MS, Diplomate ACVS et al. Veterinary surgery August 2008 37 6 508-514 Objective—To report treatment of a comminuted ulnar carpal (UC) bone fracture associated with carpal instability by pancarpal arthrodesis using 2 locking compression plates (LCP). Study Design—Case report. Animals—A 2-year-old Thoroughbred filly. Methods—An UC fracture and luxation of the proximal row of carpal bones was diagnosed radiographically. Pancarpal arthrodesis was performed with 2 LCP positioned dorsolaterally and dorsomedially and centered over the carpus through a single skin incision. The filly was maintained in a full limb cast for 15 days, followed by a tube cast for 14 days, and subsequently a full limb bandage with caudal splint for 21 days. Results—Two LCP provided appropriate carpal stability resulting in a pasture sound horse 6 months after surgery. The filly was discharged from the hospital 63 days after surgery, walking well with only a slight mechanical lameness. Conclusion—Use of 2 LCP applied on the dorsomedial and dorsolateral aspect of the carpus can provide carpal stability for pancarpal arthrodesis. Clinical Relevance—Excellent stability of the carpal joints can be achieved with 2 LCP.