CT image evaluation of the internal rotation limit prior to bony impingement after total hip arthroplasty.
This study evaluated the internal rotation limit prior to bony impingement of the proximal femur on the pelvis after total hip arthroplasty (THA). Reconstructed computed tomography (CT) images of 90 degrees hip flexion were used to simulate the internal rotation limit against safety limits measured intraoperatively. Ninety joints in 86 subjects (12 men and 74 women) underwent THA for the treatment of secondary coxarthrosis. The correlation between the internal rotation limit prior to the bony impingement intraoperatively and the simulated internal rotation angle on the reconstructed CT image was statistically significant. We provide a new method to simulate the internal rotation limit prior to bony impingement based on postoperative CT.
Department of Orthopaedic Surgery, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.
Koji
K
Suzuki
Masaaki
M
Matsubara
Sadao
S
Morita
Takeshi
T
Muneta
Ken-ichi
K
Shinomiya
D000077:Acetabulum / Q000503:physiopathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects* / Q000379:methods; D005069:Evaluation Studies as Topic; D005260:Female; D005270:Femur Head / Q000503:physiopathology; D006617:Hip Dislocation / Q000000981:diagnostic imaging* / Q000209:etiology*; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D016544:Patient Simulation; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016059:Range of Motion, Articular / Q000502:physiology*; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*