Influence of bone density on total hip resurfacing arthroplasty in patients with osteonecrosis of the femoral head – A radiological analysis

2008 ◽  
Vol 16 (3) ◽  
pp. 151-158 ◽  
Author(s):  
Fritz Thorey ◽  
Felix Reck ◽  
Henning Windhagen ◽  
Gabriela von Lewinski
Keyword(s):  
Bone Density ◽  
Femoral Head ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Total Hip ◽  
Resurfacing Arthroplasty ◽  
Radiological Analysis

scholarly journals Design of custom-made navigational template of femoral head and pilot research in total hip resurfacing arthroplasty

BMC Surgery ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jinlong Liang ◽  
Yonghui Zhao ◽  
Xinjian Gao ◽  
Xuewei Fang ◽  
Yongqing Xu ◽  
...  
Keyword(s):  
Femoral Head ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Total Hip ◽  
Resurfacing Arthroplasty ◽  
Custom Made

scholarly journals Design of Custom-made Navigational Template of Femoral Head and Pilot Research in Total Hip Resurfacing Arthroplasty

2020 ◽  
Author(s):  
Jinlong LIANG ◽  
Yonghui Zhao ◽  
Xinjian Gao ◽  
Xuewei Fang ◽  
Yongqing Xu ◽  
...  
Keyword(s):  
Femoral Head ◽  
Femoral Neck ◽  
Hip Resurfacing ◽  
Kirschner Wires ◽  
Hip Resurfacing Arthroplasty ◽  
Prosthesis Implantation ◽  
Total Hip ◽  
Resurfacing Arthroplasty ◽  
Valgus Angle ◽  
Custom Made

Abstract Background To develop a novel custom-made navigational template for accurate prosthesis implantation in total hip resurfacing arthroplasty (THRA) by computer-aided technology. Methods The template was produced based on data preoperatively acquired with computed tomography (CT) scan. The position of the drill guide was chosen as the anatomical axis of the femoral neck which was defined by the ligature between the center of the femoral head and another point on the centerline of proximal femoral neck. And the final direction of the drill guide was confirmed by a small valgus angle. The surface of the template was constructed as the inverse of the femoral neck surface. Then each template was formed from acrylate resin by using rapid prototyping (RP) technique. Finally, the template was tested in 18 cadavers scheduled for THRA and postoperative medical imaging was used to evaluate the accuracy and validity of the template. Results The template had a near-prefect fit with the femoral neck surface. There were no guide failures. Postoperative evaluation revealed that the Kirschner wires pass through the center of the femoral head, have a relative valgus angle to the central axis of the femoral neck and have no obvious varus-valgus angles or anterior/posterior inclination angles. So, the Kirschner wires achieved the expected implant requirement. Conclusion This study shows a novel way of guiding the prosthesis implantation accurately in THRA. The template is an excellent medium for preoperative planning and intraoperative technique, and embodies the development tendency of Computer Assisted Surgery.

Comparative repeatability of guide-pin axis positioning in computer-assisted and manual femoral head resurfacing arthroplasty

2007 ◽  
Vol 221 (7) ◽  
pp. 713-724 ◽  
Author(s):  
A Hodgson ◽  
N Helmy ◽  
B A Masri ◽  
N V Greidanus ◽  
K B Inkpen ◽  
...  
Keyword(s):  
Femoral Head ◽  
Computer Assisted Surgery ◽  
Hip Resurfacing ◽  
Computer Assisted ◽  
Comparable Amount ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Surgeon Experience ◽  
Position And Orientation ◽  
Version Measurement

The orientation of the femoral component in hip resurfacing arthroplasty affects the likelihood of loosening and fracture. Computer-assisted surgery has been shown to improve significantly the surgeon's ability to achieve a desired position and orientation; nevertheless, both bias and variability in positioning remain and can potentially be improved. The authors recently developed a computer-assisted surgical (CAS) technique to guide the placement of the pin used in femoral head resurfacing arthroplasty and showed that it produced significantly less variation than a typical manual technique in varus/valgus placement relative to a pre-operatively determined surgical plan while taking a comparable amount of time. In the present study, the repeatability of both the CAS and manual techniques is evaluated in order to estimate the relative contributions to overall variability of surgical technique (CAS versus manual), surgeon experience (novice versus experienced), and other sources of variability (e.g. across specimens and across surgeons). This will enable further improvements in the accuracy of CAS techniques. Three residents/fellows new to femoral head resurfacing and three experienced hip arthroplasty surgeons performed 20-30 repetitions of each of the CAS and manual techniques on at least one of four cadaveric femur specimens. The CAS system had markedly better repeatability (1.2°) in varus/valgus placement relative to the manual technique (2.8°), slightly worse repeatability in version (4.4° versus 3.2°), markedly better repeatability in mid-neck placement (0.7 mm versus 2.5 mm), no significant dependence on surgeon skill level (in contrast to the manual technique), and took significantly less time (50 s versus 123 s). Proposed improvements to the version measurement process showed potential for reducing the standard deviation by almost two thirds. This study supports the use of CAS for femoral head resurfacing as it is quicker than the manual technique, independent of surgeon experience, and demonstrates improved repeatability.

Hip resurfacing arthroplasty and total hip arthroplasty in the same patient: which do they prefer?

2019 ◽  
pp. 112070001988292 ◽  
Author(s):  
Tyler E Calkins ◽  
Linda I Suleiman ◽  
Chris Culvern ◽  
Sulaiman Alazzawi ◽  
Gregory S Kazarian ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Hip Resurfacing ◽  
Contralateral Side ◽  
Harris Hip Score ◽  
Hip Resurfacing Arthroplasty ◽  
Total Hip ◽  
Resurfacing Arthroplasty ◽  
Patient Reported

Introduction: Hip resurfacing arthroplasty (HRA) is an alternative to conventional total hip arthroplasty (THA) with potential advantages of preserving femoral bone stock and the ability to participate in higher impact activities. This study compares outcomes, satisfaction and preference in patients who underwent HRA in 1 hip and THA on the contralateral side. Methods: 62 Patients with an HRA in 1 hip and a contralateral THA were retrospectively identified at 3 centres, consisting of 38 males and 24 females with 53 patients (85.5%) undergoing HRA first. A survey regarding satisfaction and preference for each procedure and outcome scores were obtained. Results: Patients were younger (51.5 vs. 56.6 years, p = 0.002) and had longer follow-up on the HRA hip (11.0 vs. 6.0 years, p < 0.001). HRA was associated with larger increase in Harris Hip Score from preoperative to final follow-up (35.8 vs. 30.6, p = 0.035). 18 Patients (29.0%) preferred HRA, 19 (30.6%) preferred THA and 25 (40.3%) had no preference ( p = 0.844). When asked what they would choose if they could only have 1 surgery again, 41 (66.1%, p < 0.001) picked HRA. Overall satisfaction ( p = 0.504), willingness to live with their HRA versus THA for the rest of their life ( p = 0.295) and recommendation to others ( p = 0.097) were similar. Conclusions: Although HRA is associated with risks related to metal-on-metal bearings, it showed greater increase in patient-reported outcomes and a small subjective preference amongst patients who have undergone both conventional and resurfacing arthroplasty.

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