Short-term aseptic loosening of the femoral component in canine total hip replacement: effects of cementing technique on cement mantle grade.
OBJECTIVE
To evaluate the effects of different cementing techniques on radiographic cement mantle grade and short-term aseptic loosening of the femoral component in canine total hip replacement (THR).


METHODS
Retrospective study.


METHODS
Radiographs of 284 dogs that had THR.


METHODS
Immediate postoperative radiographs of 284 dogs that had cemented THR were reviewed by 4 surgeons and 1 radiologist and assigned a cement mantle grade using a 4-grade classification system. Dog age and weight at surgery, cementing technique (1st, 2nd, 3rd generation), complications (type and timing), and follow-up time were retrieved and analyzed.


RESULTS
Mean cement mantle score for 2nd generation technique was significantly higher than 3rd generation technique and both were significantly higher than 1st generation technique (P<.001). Aseptic loosening was the 2nd most common complication observed with an incidence of 2.1%. Mean time from surgery to last follow-up examination was 122 days. No statistically significant difference in incidence of aseptic loosening was identified among different cement mantle grades or cementing techniques.


CONCLUSIONS
Advanced cementing techniques resulted in better cement mantles based on grading of immediate postoperative radiographs, however grading did not predict short-term aseptic loosening. Cementing technique seemingly did not affect the incidence of short-term aseptic loosening of the femoral component for dogs in this study.


CONCLUSIONS
Our study suggests that advances in cementing technique may result in improvements in the radiographic grade of cement mantles. With respect to aseptic loosening of the femoral component, our data only suggest that short-term (3 months-3 years) loosening cannot be predicted by immediate postoperative radiographic evaluation of cement mantle.
Ota
Juri
J
Comparative Orthopaedic Laboratory, Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO 65211, USA.
Cook
James L
JL
Lewis
Daniel D
DD
Tomlinson
James L
JL
Fox
Derek B
DB
Cook
Cristi R
CR
Schultz
Loren G
LG
Brumitt
Jason
J
D000818:Animals; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D001843:Bone Cements / Q000627:therapeutic use*; D002484:Cementation / Q000379:methods / Q000662:veterinary*; D004285:Dogs / Q000293:injuries / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D011183:Postoperative Complications / Q000453:epidemiology / Q000662:veterinary; D011475:Prosthesis Failure / Q000662:veterinary; D011859:Radiography; D012086:Reoperation / Q000662:veterinary; D012189:Retrospective Studies; D016019:Survival Analysis
D001843:Bone Cements