Revision of a loose cementless short-stem threaded femoral component using a standard cementless stem in a canine hip arthroplasty.
A Helica short-stemmed femoral prosthesis that was identified as being loose one year after implantation was revised with a standard long stem cementless BFX femoral prosthesis. A double pelvic osteotomy was also performed to improve the orientation of the stable acetabular cup. Despite complete resorption of the femoral neck, and a large perforation of the lateral femoral cortex, the revision stem did not subside or rotate. The prosthetic joint did not dislocate. At re-evaluation two years after revision surgery, the prosthetic components were stable. Signs of bone ingrowth into the stem and cup were evident on radiographs. The dog had a seven percent greater thigh muscle girth in the limb implanted with the hip prosthesis compared to the contralateral limb, and was very active with no lameness.
Dr. Simon Roe, BVSc, PhD, DACVS, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1052 William Moore Drive, Raleigh, NC, 27607, United States, Phone: +1 919 513 6334, Fax: +1 919 513 6336, E-mail: Simon_Roe@ncsu.edu.
S C
SC
Roe
D J
DJ
Marcellin-Little
B D X
BD
Lascelles
D000818:Animals; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D004283:Dog Diseases / Q000000981:diagnostic imaging / Q000601:surgery*; D004285:Dogs; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation / Q000662:veterinary
Total hip replacement; cementless stem; revision