@article{sebestyen_marcellin-little_deyoung_2000, title={Femoral medullary infarction secondary to canine total hip arthroplasty}, volume={29}, ISSN={["1532-950X"]}, DOI={10.1053/jvet.2000.4391}, abstractNote={To evaluate the prevalence of femoral intramedullary infarction after total hip arthroplasty (THA) and to determine whether any specific femoral morphology predisposes to bone infarction.Retrospective clinical study.All dogs from our hospital population undergoing THA between 1984 and 1997 with radiographic follow-up available at 1 year or more postoperatively.A case control study was conducted within the THA group to determine risk factors predisposing to femoral infarction after THA. Medical records and radiographs were reviewed. Data were collected on clinical parameters, femoral morphology, prosthesis, and bone changes. Radiographic diagnosis was confirmed using histopathology in 11 femora. Radiographs of 50 age-matched control dogs weighing more than 20 kg with coxofemoral degenerative joint disease were randomly chosen to determine the prevalence of bone infarction in nonoperated dogs.Ninety-one dogs with 110 THA were included in the study. Fifteen of the 110 femora with THA had radiographic evidence of infarction (14%). Infarction was not present in any femora in the control group. There was no significant difference in the prevalence of infarction between dogs that received cemented or uncemented prostheses. Clinical signs were not reported in any patient that developed femoral infarction. Young age (P = .03) and a distance between the greater trochanter and nutrient foramen greater than 79 mm (P = .008) predisposed dogs to femoral infarction. Over time, three infarcts decreased in size radiographically, five remained unchanged, and three expanded. An osteosarcoma developed at the site of a bone infarct in one dog.Femoral intramedullary infarction occurred in 15 of 110 THA. Young age at the time of THA and a greater distance between the greater trochanter and the nutrient foramen predisposed to infarction.Intramedullary infarction occurs after canine THA. These bone infarcts do not appear to cause clinical signs; however, they may present a diagnostic challenge. Malignant transformation could potentially result from medullary infarction.}, number={3}, journal={VETERINARY SURGERY}, author={Sebestyen, P and Marcellin-Little, DJ and DeYoung, BA}, year={2000}, pages={227–236} }
 @article{marcellin-little_deyoung_doyens_deyoung_1999, title={Canine uncemented porous-coated anatomic total hip arthroplasty: Results of a long-term prospective evaluation of 50 consecutive cases}, volume={28}, ISSN={["1532-950X"]}, DOI={10.1053/jvet.1999.0010}, abstractNote={To evaluate the long-term clinical and radiographic results of a canine uncemented porous-coated anatomic (PCA) total hip arthroplasty (THA).Prospective study of consecutive clinical patients using survival analysis.Forty-one dogs that underwent PCA THA; nine had bilateral PCA THA (50 prostheses).Gait observation, orthopedic examination, and radiographic assessment were conducted before THA, 6 months after THA, and yearly thereafter. A zonal analysis system was used to document osseous changes in the femur and the acetabulum. Acetabular cup and femoral stem subsidence and migration, femoral canal fill, and implant orientation were measured. Survival analysis of the procedure was conducted.Long-term follow-up was available for 37 dogs (46 prostheses). The median follow-up was 63 months. Limb function was normal for 37 limbs and abnormal for 9 limbs because of dislocation (n = 3), lumbosacral disease (n = 2), degenerative myelopathy (n = 1), autoimmune disease (n = 1), brain tumor (n = 1), or osteosarcoma of the femur (n = 1). All prosthetic stems and cups were fixed by bone ingrowth fixation. Osteolysis was not observed. Bone infarction occurred in five femoral canals (four dogs). The 6-year survival rate for the procedure was 87% (95% confidence interval, 72%-96%).Long-term fixation of the uncemented PCA acetabular cup and stem is successful in dogs, and long-term clinical function is excellent.}, number={1}, journal={VETERINARY SURGERY}, author={Marcellin-Little, DJ and DeYoung, BA and Doyens, DH and DeYoung, DJ}, year={1999}, pages={10–20} }
 @article{massat_miller_deyoung_schiller_aberman_deyoung_1998, title={Single-stage revision using an uncemented, porous-coated, anatomic endoprosthesis in two dogs: Case report}, volume={27}, ISSN={["1532-950X"]}, DOI={10.1111/j.1532-950X.1998.tb00125.x}, abstractNote={Objective—To describe the clinical and radiographic features of septic and aseptic failure of two femoral endoprostheses and their successful revision. Study Design—Case report. Animals or Sample Population—Two skeletally mature male research dogs. Methods—An uncemented porous-coated anatomic (PCA) endoprosthesis was implanted in a single-stage revision procedure after thorough debridement and lavage of the femoral canal. An autogenous cancellous bone graft was used in dog 2 (aseptic loosening). Serial clinical and radiographic examinations were performed postoperatively. The dogs were euthanatized 1 year (dog 1) and 2 years (dog 2) after revision surgery, and necropsy was performed. High-resolution contact radiographs and histopathologic evaluation of femoral sections were obtained. Results—The cause of implant failure was septic loosening in dog 1 and aseptic loosening in dog 2. In both dogs, clinical function returned to normal after revision. Serial radiographic assessment after revision documented disappearance of the bone pedestal and the periprosthetic lucency. Cancellous hypertrophy seen adjacent to the proximal porous-coated region of the implants provided radiographic evidence of bony fixation. Histological evaluation of femoral sections documented successful implant integration with bone and fibrous tissue. Conclusion—Revision with an uncemented implant in a single-stage procedure was successful in the two dogs described in this report. Clinical Relevance—This report provides a detailed description of the clinical course and serial radiographic assessment of septic and aseptic loosening of two femoral endoprostheses. Single-stage revision is a potential treatment for either condition as demonstrated by the successful outcome in these two dogs.}, number={3}, journal={VETERINARY SURGERY}, author={Massat, BJ and Miller, RT and DeYoung, BA and Schiller, RA and Aberman, HM and DeYoung, DJ}, year={1998}, pages={268–277} }
 @article{wylie_deyoung_drost_deyoung_1997, title={The effect of surgical approach on femoral stem position in canine cemented total hip replacement}, volume={26}, ISSN={["0161-3499"]}, DOI={10.1111/j.1532-950X.1997.tb01464.x}, abstractNote={A prospective clinical study was designed to determine the effect of surgical approach on femoral stem position in canine cemented total hip replacement. Candidates for total hip replacement were randomly placed into one of two groups. In one group (n = 10), a craniolateral approach to the hip joint was made, incorporating a femoral trochanteric osteotomy. In the other group (n = 11), a craniolateral approach to the hip joint was made without performing a femoral trochanteric osteotomy. Radiographs obtained immediately after the operation were evaluated by two independent examiners for femoral stem position (neutral, varus, or valgus) and percentage of femoral canal fill, using a defined protocol. There was no statistical difference in femoral stem position between the study groups, whereas a greater percentage of canal fill was associated with the neutral femoral stem position.}, number={1}, journal={VETERINARY SURGERY}, author={Wylie, KB and DeYoung, DJ and Drost, WT and DeYoung, BA}, year={1997}, pages={62–66} }
 @article{marcellin-little_deyoung_doyens_deyoung, title={Canine uncemented porous-coated anatomic total hip arthroplasty: Results of a long-term prospective evaluation of 50 consecutive cases}, volume={10}, ISBN={1018-2357}, number={1}, journal={European Journal of Companion Animal Practice}, author={Marcellin-Little, D. J. and DeYoung, B. A. and Doyens, H. and DeYoung, D. J.}, pages={49} }