Abstract
The purpose of our study was to explore the feasibility of 3D printing navigation template used in total hip arthroplasty (THA) for adult developmental dysplasia of the hip (DDH). 25 patients who received THA for DDH from February 2014 to May 2018 were randomized into the control or intervention group. Of these patients, 12 received THAs assisted with 3D printing navigation templates, 13 THAs underwent THAs without navigation templates. The mean follow-up was 1.6 (range, 1.2-3.8) years. Clinical scores and radiographic results were evaluated for two groups. Operating time, intra- and postoperative hemorrhage and Harris Hip Score (HHS) at 6 months postoperatively in the 3D printing group were better than those for patients in the conventional hip replacement group, while infection and implant loosening were 0 in the two groups. There were no significant differences in anteversion angle, abduction angle and the distance from rotation center to the ischial tuberosity line in 3D printing group as compared to the normal side. The abduction angle and the distance from rotation center to the ischial tuberosity line were significantly different between the two sides in the traditional group. Application of the 3D printing template for THA with DDH can facilitate the surgical procedure and create an ideal artificial acetabulum placement.
Highlights
Adult developmental dysplasia of the hip (DDH), the most common cause of secondary osteoarthrosis[–], has the basic pathological change which leads to an unstable hip, as well as anterolateral displacement
The finding suggests that 3D printing navigation template used in total hip arthroplasty is an individualized, accurate technology
In a total hip arthroplasty (THA) of patient with DDH, there will be three major difficulties: acetabular reconstruction, soft tissue balancing around the hip joint and femoral reconstruction[], as for the acetabulum, inadequate acetabular coverage on the femoral head, shallow and small sized acetabulum and mostly coloboma on the anterior lateral wall are the common problems[], especially for Crowe III/IV cases, it is one of the concerned points to locate the real acetabulum during the operation
Summary
Adult developmental dysplasia of the hip (DDH), the most common cause of secondary osteoarthrosis[–], has the basic pathological change which leads to an unstable hip, as well as anterolateral displacement. Most patients eventually have to undergo total hip arthroplasty (THA), which, one of the most successful surgical interventions in medical field today, provides reliable pain relief and functional improvement to the hip[–]. In a THA of patient with DDH, there will be three major difficulties: acetabular reconstruction, soft tissue balancing around the hip joint and femoral reconstruction[], as for the acetabulum, inadequate acetabular coverage on the femoral head, shallow and small sized acetabulum and mostly coloboma on the anterior lateral wall are the common problems[], especially for Crowe III/IV cases, it is one of the concerned points to locate the real acetabulum during the operation. Traditional total hip arthroplasty does not adequately consider individual difference, often leads to bias in placement of the prosthesis[–]. It is difficult to locate the real acetabulum in the total hip arthroplasty (THA) for developmental dysplasia of the hip (DDH), The goal of this study was to explore the application of 3D printing navigation template used in total hip arthroplasty (THA) for developmental dysplasia of the hip
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