Factors affecting acetabular bone loss during primary hip arthroplasty--a quantitative analysis using computer simulation.
BACKGROUND
Although, various factors may affect the degree of acetabular bone loss during primary hip arthroplasty, they have not been quantified previously.


METHODS
We assessed the influence of using various reamer diameters, designs and reaming depth on the amount of bone removed during acetabular preparation by simulated reaming in a three-dimensional pelvic model, using computer software.


RESULTS
The least amount of bone loss (6185 mm3) providing optimal bone contact with the acetabular articular surface occurred with a 165 degrees reamer design. Increase in reamer diameter, reaming depth and subtending angle of the reamer resulted in disproportionately large increase in the amount of bone resected compared to the relatively small increase in the reamer-bone contact area.


CONCLUSIONS
Surgeons must be aware of the relative influence of the reaming technique and the implant design on the amount of acetabular bone resection to optimize acetabular bone preservation during primary hip arthroplasty.
Lavigne
Martin
M
Department of Surgery, University of Montreal, Maisonneuve-Rosemont Hospital, 5345 Boul L'Assomption, Suite 55 Montréal, Québec, Canada H1T 4B3. lavigma2@hotmail.com
Rama
Reddi Krishna Boddu Siva
RK
Ganapathi
Muthu
M
Nuño
Natalia
N
Winzenrieth
Renaud
R
Vendittoli
Pascal-André
PA
D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery*; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D003198:Computer Simulation; D006801:Humans; D008297:Male; D008954:Models, Biological; D010027:Osteotomy / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome