Deformation of press-fitted metallic resurfacing cups. Part 2: Finite element simulation

Yew, Andy Khye Soon; Zhang, Jin; Donn, Anthony; Morlock, Michael M.; Isaac, Graham

doi:10.1243/095441105x69105

Cited by 54 publications

(55 citation statements)

References 16 publications

(5 reference statements)

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“…However, the minimum size of the femoral component is defined by the femoral neck diameter; otherwise notching will occur, resulting in an increased risk for femoral neck fractures, a major cause of failure in HRA [4,6,14,20]. Therefore, considering the large femoral components and minimum wall diameter of the acetabular cups necessary to provide sufficient internal rigidity [24], additional bone resection on the acetabular side might be the result of femoral bone preservation [12]. This assumption was affirmed by Loughead et al [13] and by our results.…”

Section: Discussionmentioning

confidence: 99%

Does Hip Resurfacing Require Larger Acetabular Cups Than Conventional THA?

Naal

Kain²,

Hersche

et al. 2009

Clin Orthop Relat Res

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Section: Discussionmentioning

confidence: 99%

Does Hip Resurfacing Require Larger Acetabular Cups Than Conventional THA?

Naal

Kain²,

Hersche

et al. 2009

Clin Orthop Relat Res

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“…The AC deformation after insertion should be minimized in order to allow proper insertion of the liner in the AC [11,12]. The cup deformation was examined by changing implant designs or interference levels using static implicit loads [13] or explicit dynamics model [14] to simulate the implant impaction. The cup deformation was shown to increase with the level of interference fit [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…The cup deformation was examined by changing implant designs or interference levels using static implicit loads [13] or explicit dynamics model [14] to simulate the implant impaction. The cup deformation was shown to increase with the level of interference fit [13,14]. In order to promote biological fixation through bone ingrowth and to minimize the gap between bone and the implant surface, different studies have also focused on finding an optimal configuration for the implant seating while considering different implant geometry, interference fit and friction levels [15,16].…”

Section: Introductionmentioning

confidence: 99%

Finite element model of the impaction of a press-fitted acetabular cup

Michel

Nguyen

Bosc

et al. 2016

Med Biol Eng Comput

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Finite element model of the impaction of a press-fitted acetabular cup: estimation of the contact area. Finite element model of the impaction of a press-fitted acetabular cup: estimation of the contact area. 2 AbstractPress-fit surgical procedures aim at providing primary stability to acetabular cup (AC) implants. Impact analysis constitutes a powerful approach to retrieve the AC implant insertion properties. The aim of this numerical study was to investigate the dynamic interaction occurring between the hammer, the ancillary and bone tissue during the impact and to assess the potential of impact analysis to retrieve AC implant insertion conditions. A dynamic two-dimensional axisymmetric model was developed to simulate the impaction of the AC implant into bone tissue assuming friction at the bone-implant interface and large deformations. Different values of interference fit (from 0.5 to 2 mm) and impact velocities (from 1 to 2 m.s -1 ) were considered. For each configuration, the variation of the force applied between the hammer and the ancillary was analyzed and an indicator I was determined based on the impact momentum of the signal.The simulated results are compared to the experiments. The value of the polar gap decreases versus the impact velocity and increases versus the interference fit. The bone implant contact area was significantly correlated with the resonance frequency (R 2 =0.94) and the indicator (R 2 =0.95).The results show the potential of impact analyses to retrieve the bone-implant contact properties.Keywords: Acetabular cup; hip replacement; impact; finite element; bone; Biomechanics; bone Author Biographies:Adrien Michel has completed his PhD in biomechanics in the MSME laboratory. Romain Bosc and Philippe Hernigou are experienced surgeons. Vu-Hieu Nguyen and Salah Naili are experts in mechanical modeling and simulation. Romain Vayron and Guillaume Haiat are specialized in biomechanical engineering of implants.Finite element model of the impaction of a press-fitted acetabular cup: estimation of the contact area.3

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“…Although the local clearance at the pole of the Alpharabola hip implant is zero, a large equatorial clearance of (2  ) 1/2 R 2  R 2 can be formed for the horizontally positioned cup by the continuous and monotonous variation in the radius of the Alpharabola surface. Such a large equatorial clearance is advantageous to avoid the potential clamping and equatorial contact under loading (Farrar and Schmidt, 1997) and when implanted through press-fit Yew et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Contact mechanics and elastohydrodynamic lubrication in a novel metal-on-metal hip implant with an aspherical bearing surface

Meng

Gao

Liu

et al. 2010

Journal of Biomechanics

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Diameter and diametral clearance of the bearing surfaces of metal-on-metal hip implants and structural supports have been recognized as key factors to reduce the dry contact and hydrodynamic pressure and improve lubrication performance. On the other hand, application of aspherical bearing surfaces can also significantly affect the contact mechanics and lubrication performance by changing the radius of the curvature of a bearing surface and consequently improving the conformity between the head and the cup. In this study, a novel metal-on-metal hip implant employing a specific aspherical bearing surface, Alpharabola, as the acetabular surface was investigated for both contact mechanics and elastohydrodynamic lubrication under steady state conditions. When compared with conventional spherical bearing surfaces, a more uniform pressure distribution and a thicker lubricant film thickness within the loaded conjunction were predicted for this novel Alpharabola hip implant. The effects of the geometric parameters of this novel acetabular surface on the pressure distribution and lubricant thickness were investigated. A significant increase in the predicted lubricant film thickness and a significant decrease in the dry contact and hydrodynamic pressures were found with appropriate combinations of these geometric parameters, compared with the spherical bearing surface.

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Deformation of press-fitted metallic resurfacing cups. Part 2: Finite element simulation

Cited by 54 publications

References 16 publications

Does Hip Resurfacing Require Larger Acetabular Cups Than Conventional THA?

Does Hip Resurfacing Require Larger Acetabular Cups Than Conventional THA?

Finite element model of the impaction of a press-fitted acetabular cup

Contact mechanics and elastohydrodynamic lubrication in a novel metal-on-metal hip implant with an aspherical bearing surface

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