Wataru Ando1, Masaki Takao2, Hidetoshi Hamada2, Keisuke Uemura1, Nobuhiko Sugano3. 1. Department of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan. 2. Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan. 3. Department of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan. n-sugano@umin.net.
Abstract
PURPOSE: We investigated the accuracy of the acetabular cup position and orientation in robotic-assisted total hip arthroplasty (rTHA) compared to navigated THA (nTHA) using computed tomography (CT) for patients with osteoarthritis secondary to developmental dysplasia of the hip (DDH). METHODS: We studied 31 hips of 28 patients who underwent rTHA and 119 hips of 112 patients who underwent nTHA with the same target cup orientation. After propensity score matching, each group comprised 29 hips. Post-operative cup position and orientation were measured from the postoperative CT data. Errors from the target cup position and orientation were compared between the two groups. RESULTS: Post-operatively, the absolute error of the anteroposterior and superoinferior cup positions from the target position was significantly lower in the rTHA group than in the nTHA group. The change in the post-operative radiographic inclination from the target orientation was lower in the rTHA group than in the nTHA group. Screw fixation for cup implantation was required for three hips in the nTHA group but not in the rTHA group. CONCLUSION: rTHA achieved more precise cup implantation with reduced variation from the target orientation compared to nTHA in patients with osteoarthritis secondary to DDH.
PURPOSE: We investigated the accuracy of the acetabular cup position and orientation in robotic-assisted total hip arthroplasty (rTHA) compared to navigated THA (nTHA) using computed tomography (CT) for patients with osteoarthritis secondary to developmental dysplasia of the hip (DDH). METHODS: We studied 31 hips of 28 patients who underwent rTHA and 119 hips of 112 patients who underwent nTHA with the same target cup orientation. After propensity score matching, each group comprised 29 hips. Post-operative cup position and orientation were measured from the postoperative CT data. Errors from the target cup position and orientation were compared between the two groups. RESULTS: Post-operatively, the absolute error of the anteroposterior and superoinferior cup positions from the target position was significantly lower in the rTHA group than in the nTHA group. The change in the post-operative radiographic inclination from the target orientation was lower in the rTHA group than in the nTHA group. Screw fixation for cup implantation was required for three hips in the nTHA group but not in the rTHA group. CONCLUSION: rTHA achieved more precise cup implantation with reduced variation from the target orientation compared to nTHA in patients with osteoarthritis secondary to DDH.
Entities:
Keywords:
Acetabular cup orientation; Acetabular cup position; Computed tomography based navigation; Developmental dysplasia of the hip (DDH); Navigated total hip arthroplasty; Robotic-assisted total hip arthroplasty
Authors: Leah Elson; Jon Dounchis; Richard Illgen; Robert C Marchand; Douglas E Padgett; Charles R Bragdon; Henrik Malchau Journal: Hip Int Date: 2015-09-10 Impact factor: 2.135
Authors: Benjamin G Domb; Youssef F El Bitar; Adam Y Sadik; Christine E Stake; Itamar B Botser Journal: Clin Orthop Relat Res Date: 2013-08-29 Impact factor: 4.176
Authors: Randa K Elmallah; Jeffrey J Cherian; Julio J Jauregui; David A Padden; Steven F Harwin; Michael A Mont Journal: Surg Technol Int Date: 2015-05
Authors: Mark C Callanan; Bryan Jarrett; Charles R Bragdon; David Zurakowski; Harry E Rubash; Andrew A Freiberg; Henrik Malchau Journal: Clin Orthop Relat Res Date: 2011-02 Impact factor: 4.176
Authors: S R Nodzo; C-C Chang; K M Carroll; B T Barlow; S A Banks; D E Padgett; D J Mayman; S A Jerabek Journal: Bone Joint J Date: 2018-10 Impact factor: 5.082