scholarly journals Effects of Reamer-Femoral Component Offset on Cement Mantle Penetration in Hip Resurfacing Arthroplasty

2010 ◽  
Author(s):  
Mark Lloyd Paulick
Keyword(s):  
Femoral Component ◽  
Cement Mantle ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty

scholarly journals No added value for Computer-Assisted surgery to improve femoral component positioning and Patient Reported Outcomes in Hip Resurfacing Arthroplasty; a multi-center randomized controlled trial

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
M. C. Koper ◽  
M. Reijman ◽  
E. M. van Es ◽  
J. H. Waarsing ◽  
H. W. J. Koot ◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Femoral Component ◽  
Controlled Trial ◽  
Computer Assisted Surgery ◽  
Hip Resurfacing ◽  
Added Value ◽  
Computer Assisted ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Randomized Controlled

Abstract Background Computer Assisted Surgery (CAS) has proven to improve the accuracy in several orthopedic procedures. Therefore we used this technique to evaluate femoral component positioning in Hip Resurfacing Arthroplasty (HRA). The aim of this study was to evaluate imageless CAS compared to manually implanted femoral components and subsequently evaluates Patient Related Outcome Measures (PROMs). We hypothesized that the use of CAS optimizes the position of the femoral component and improves PROMs. Methods This is a multicenter, single-blinded, randomized, controlled trial of two groups. In the CAS group guiding of the femoral component was done with imageless navigation. In the Conventional (control) group the femoral component was placed manually according to the preplanned position. The primary outcome measure consists of a maximum of 3 degrees difference between the postoperative Stem Shaft Angle (SSA) and preplanned SSA. Secondary outcome measures consist of the Hip disability and Osteoarthritis Outcome Scale (HOOS), the Harris Hip Score (HHS) and Visual Analogue Scale (VAS) pain score. Results A total of 122 patients were randomized, 61 in the CAS group and 61 in the conventional group. There was no significant differences in accuracy of femoral implant position. The mean difference between the postoperative- and preplanned SSA was − 2.26 and − 1.75 degrees (more varus) respectively in the CAS and Conventional group. After surgery both groups show significant improvement in all PROMs compared to the baseline measurements, with no significant differences between the groups. Conclusion Our cohort indicates no benefit for the use of CAS in accuracy of placement of the femoral component in HRA compared to manual implantation. There are no clinical differences in PROMs after 1 year follow up. This study showed no added value and no justification for the use of CAS in femoral component positioning in HRA. Trial registration This trial is registered at ClinicalTrails.gov (https://clinicaltrials.gov/) on the 25th of October 2006: NCT00391937. Level of incidence Level IIb, multicenter randomized controlled trial.

Femoral Component Neck Fracture After Failed Hip Resurfacing Arthroplasty

2011 ◽  
Vol 26 (8) ◽  
pp. 1570.e1-1570.e4 ◽  
Author(s):  
Pieter K. Bos ◽  
Frans C. van Biezen ◽  
Harrie Weinans
Keyword(s):  
Femoral Component ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Neck Fracture

Is a cementless fixation of the femoral component suitable for metal-on-metal hip resurfacing arthroplasty?

2018 ◽  
Vol 29 (6) ◽  
pp. 624-629 ◽  
Author(s):  
Harlan C Amstutz ◽  
Michel J Le Duff
Keyword(s):  
Quality Of Life ◽  
Femoral Component ◽  
Young Patients ◽  
Hip Resurfacing ◽  
Complication Rates ◽  
Mineral Density ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Male Patients

Background: Hip resurfacing arthroplasty (HRA) typically uses a hybrid design (cemented femoral component and cementless acetabular shell) but has recently been performed with fully cementless components. There is a paucity of information on the clinical performance of these cementless designs. Methods: The UCLA clinical scores, SF-12 quality of life scores, complication rates, survivorship and radiographic signs of loosening or gross stress shielding of 39 hips (39 male patients) implanted with cementless HRA were compared with those of 40 hips (37 male patients) implanted with hybrid HRA during the same time frame. Results: There were no significant differences in postoperative clinical and quality of life scores, complication rates, or radiographic signs of loosening between the 2 groups. The 5-year Kaplan-Meier survivorship was 97.2% for the cementless group and 100% for the hybrid group. This difference was not significant ( p = 0.3694). There were no femoral component failures in any of the 2 groups. Conclusions: At a mean follow-up of 6 years, there is no tangible difference between the performance of cementless HRA compared to hybrid HRA. The absence of learning curve associated with this device and the potential for better preservation of femoral neck bone mineral density suggest that this technology is well suited for young patients with good bone quality seeking to resume an active lifestyle including high-impact activities.

Femoral component loosening after hip resurfacing arthroplasty

2010 ◽  
Vol 39 (8) ◽  
pp. 747-756 ◽  
Author(s):  
Jozef Zustin ◽  
Michael Hahn ◽  
Michael M. Morlock ◽  
Wolfgang Rüther ◽  
Michael Amling ◽  
...  
Keyword(s):  
Femoral Component ◽  
Hip Resurfacing ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Component Loosening

scholarly journals The influence of cementing technique in hip resurfacing arthroplasty on the initial stability of the femoral component

2011 ◽  
Vol 35 (12) ◽  
pp. 1759-1765 ◽  
Author(s):  
Rudi G. Bitsch ◽  
Sebastian Jäger ◽  
Marcus Lürssen ◽  
Travis Loidolt ◽  
Thomas P. Schmalzried ◽  
...  
Keyword(s):  
Femoral Component ◽  
Hip Resurfacing ◽  
Cementing Technique ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
Initial Stability

Mechanical and numerical characterization of ceramic femoral components for hip resurfacing arthroplasty

2019 ◽  
Vol 233 (9) ◽  
pp. 883-891 ◽  
Author(s):  
Danny Vogel ◽  
Martin Liebelt ◽  
Florian Kalkowsky ◽  
Thomas Oberbach ◽  
Daniel Delfosse ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Femoral Component ◽  
Hip Resurfacing ◽  
Fracture Load ◽  
Element Analysis ◽  
Hip Resurfacing Arthroplasty ◽  
Resurfacing Arthroplasty ◽  
The Finite Element Analysis ◽  
Copper Ring

Hip resurfacing arthroplasty may have distinct advantages for young and active patients, but large metal-on-metal bearings can be associated with increased wear, adverse tissue reactions and higher rate of implant loosening. Ceramic wear couples are a commonly used alternative to metals and therefore might be an alternative for hip resurfacing arthroplastys. The aim of this study was to evaluate the mechanical strength of femoral components made of an alumina-toughened zirconia composite by means of experimental testing and finite element analysis. For the mechanical characterization, ceramic femoral components (Ø: 48 mm) were tested under compression loading experimentally until fracture occurred or a maximum load of 85 kN was obtained. The femoral components were either loaded against a ceramic cup or a copper ring (outer diameter Ø: 7.0 mm). In addition, the complex geometry of the ceramic femoral component was simplified, and only the stem was loaded in a cantilever test until fracture. In addition, the fracture tests were numerically simulated to investigate the influence of additional loading conditions and geometric parameters, which were not experimentally tested. The experimental data were used for validation of the finite element analysis. None of the tested ceramic femoral components fractured at a compression load of 85 kN when they were loaded against a ceramic cup at an inclination angle of 45°. When the femoral components were loaded against a copper ring, the femoral components fractured at 29.9 kN at a testing angle of 45°. The fracture load was reduced when an angle of 30° and increased when an angle of 60° was simulated. Using an experimental cantilever test, the stem of the femoral component fractured at 1124.0 N. When the stem length was increased or the diameter was reduced by 10% in the finite element analysis, the fracture load was reduced. Decreasing the length or increasing the diameter led to an increase of the fracture load. The strongest influence was found for the reduction of the transition radius of the stem, with a decrease of the fracture load up to 27.2%. The analyzed femoral components made of alumina-toughened zirconia (ATZ) showed sufficient mechanical capability to withstand high loadings during unfavorable loading conditions. However, further biomechanical and tribological investigations are required before clinical application.

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