Clin Orthop Relat Res 2004 Sep(426):159-63
Department of Orthopaedic Surgery, Medical University of Innsbruck, Austria.
Rev Chir Orthop Reparatrice Appar Mot 2007 May;93(3):238-46
Service de Chirurgie Orthopédique, Hôpital Sainte-Marguerite, 270, boulevard Sainte-Marguerite, BP 29, 13274 Marseille Cedex 09.
Purpose Of The Study: Actetabular component malpositioning during total hip arthroplasty (THA) increases the risk of dislocation, reduces the range of motion, and can be the cause of early wear and loosening. There have been numerous reports on the optimal orientation of the acebaular component in THA. Lewinnek et al recommended an abduction angle of 40+/-10 degrees and an anteversion of 15+/-10 degrees for cup alignment in THA. Read More
Clin Biomech (Bristol, Avon) 2008 Oct 9;23(8):1004-11. Epub 2008 Jun 9.
Department of Physical Therapy and Human Movement Sciences, Northwestern University, 645 N. Michigan Avenue, Chicago, IL 60611, USA.
Background: Successful hip reconstruction to restore the normal hip biomechanics requires precise placement of implants. Computer assisted navigation in total hip arthroplasty has been proposed to have the potential to help achieve a high accuracy in implant placement. The goal of the study was to evaluate the accuracy of an imageless computer navigation system on cadavers and to validate a non-invasive computed tomography method for post-operative determination of acetabular cup orientation. Read More
J Arthroplasty 2007 Feb;22(2):151-9
Facharzt für Orthopädie/Rheumatologie Sportmedizin, Chirotherapie, Phys. Med. Orthopädische Klinik, Brakel, Germany.
This retrospective study compared the efficacy of computer navigation and conventional freehand techniques to place acetabular component orientation in the target position of acetabular cup inclination of 45 degrees and anteversion of 20 degrees . We selected 69 patients who had undergone total hip arthroplasty with freehand cup insertion who had computed tomography (CT) to plan for acetabular cup placement of the contralateral side. This group was compared with 98 patients who underwent CT-based cup insertion, and all had postoperative CT. Read More
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2007 Oct;21(10):1057-61
Department of Orthopedics, Nanjing First Hospital Affiliated to Nanjing Medical Universty, Nanjing Jiangsu 210006, PR. China.
Objective: To improve the accuracy of the acetabular component placement using the non-image based surgical navigation system.
Methods: Twenty-three patients (14 males, 9 females; age, 28-55 years; 26 hips) with hip disease underwent the total hip arthroplasty (THA) using the non-image based surgical navigation system from February 2004 to April 2006. Rheumatoid arthritis was found in 3 patients (3 hips), necrosis of the femoral head in 6 patients (6 hips), and osteoarthritis in 14 patients (16 hips). Read More