Effect of friction and clearance on kinematics and contact mechanics of dual mobility hip implant

Gao, Yongchang; Chai, Wei; Wang, Manyi; Zhang, Jin

doi:10.1177/0954411915617198

Cited by 12 publications

(4 citation statements)

References 25 publications

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“…Some researchers posit that the wear of DMC may be higher than that of SM AHJ if the outer articulation is dominant, owing to the larger contact area and sliding distance at the outer articulation compared to the inner articulation. 80 Indeed, despite possessing two mobile articulations, the wear rate observed on the DMC does not exhibit a magnitude twice that of the wear rate observed on the SM AHJ. The wear rate of both of them exhibits only a slight disparity.…”

Section: Discussionmentioning

confidence: 94%

Running-in behavior of dual-mobility cup during the gait cycle: A finite element analysis

Hidayat,

Ismail,

Tauviqirrahman

et al. 2023

Proc Inst Mech Eng H

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The running-in process is considered an essential aspect of the comprehensive wear process. The phenomenon of running-in occurs during the initial stages of wear in the prosthetic hip joint. Within the field of tribology, the running-in phenomenon of the hip joint pertains to the mechanism by which the contact surfaces of the artificial hip joint components are adjusted and a suitable lubricating film is formed. During the process of hip joint running-in, there is an interaction between the metal surface of the ball and the joint cup, which results in adjustments being made until a steady state is achieved. The achievement of desirable wear existence and reliable performance of artificial hip joint components are reliant upon the tribological running-in of the hip joint. Despite the establishment of current modeling approaches, there remains a significant lack of understanding concerning running-in wear, particularly the metal-on-polyethylene (MoP) articulations in dual-mobility cups (DMC). An essential aspect to consider is the running-in phase of the dual mobility component. The present study employed finite element analysis to investigate the running-in behavior of dual mobility cups, wherein femoral head components were matched with polyethylene liners of varying thicknesses. The analysis of the running-in phase was conducted during the normal gait cycle. The results of this investigation may be utilized to design a dual-mobility prosthetic hip joint that exhibits minimal running-in wear.

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Section: Discussionmentioning

confidence: 94%

Running-in behavior of dual-mobility cup during the gait cycle: A finite element analysis

Hidayat,

Ismail,

Tauviqirrahman

et al. 2023

Proc Inst Mech Eng H

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“…However, it is possible that the stem neck impinges the inner rim of the liner when high anteversion angle is initially set for the liner and finally leads to rotation of the liner together with the stem (relative motion at the outer articulation) under the same walking activity. Both of these two different relative motions during walking gait cycle were observed in the studies by Gao et al [7,8]. Besides high anteversion angle of the liner, large range of motions like climbing/descending stairs and chair sittingdown/standing-up will probably result in impingement and then cause relative motion at outer articulation for the dual mobility hip implant.…”

Section: Introductionmentioning

confidence: 87%

“…e elastic modules, the Poisson ratio, and density of all parts are also listed in Table 1. e UHMWPE was treated as a nonlinear material with the yield stress of 23.56 MPa [7,18], and it was also considered as elastic-plastic. Because the elastic moduli of both the titanium alloy and cobalt-chromium alloy were two orders of magnitude higher than those of the UHMWPE, these metallic parts were regarded as rigid-body.…”

Section: Methodsmentioning

confidence: 99%

Effects of Daily Activities and Position on Kinematics and Contact Mechanics of Dual Mobility Hip Implant

Gao

Zhao

Chen

et al. 2020

Journal of Healthcare Engineering

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Dual mobility hip implants have been widely introduced to overcome dislocation in recent years. However, the potential influence of different gaits on kinematics and contact mechanics for dual mobility hip implants is still unclear. Furthermore, a large range of motion coupling with the implant position, especially high inclination or anteversion angle, may result in poor kinematics and contact mechanics. A previously developed dynamic finite element method was adopted in this study to examine the kinematics and corresponding stability of dual mobility hip implants under different gaits coupling with different inclinations or anteversion angles. The results showed only inner relative sliding under knee-bending for dual mobility hip implants under moderate inclination and anteversion angles, whereas an anteversion angle of 25° induced both impingement and consequent relative sliding of the outer articulation. However, the impingement (between the stem neck and the liner inner rim) indeed happened under stair-climbing and sitting-down/stand-up as well as combined movements when inclination and anteversion angles were set as 45° and 0°, respectively, and this finally led to relative sliding at the outer articulation. A high inclination angle did not worsen both the impingement and related outer sliding compared to modest inclination and anteversion angles of the liner, but a high anteversion angle prolonged the period of both the impingement and the outer relative sliding. The extreme motions and high anteversion angles are hardly inevitable, and they indeed lead to motions at both articulations for dual mobility hip implants.

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“…In this study, five different metal head-polyethylene liner conformities were evaluated: α = 0.01, 0.025, 0.05, 0.075, and 0.1 mm, [25][26][27] with smaller α values corresponding to larger conformities. The loading conditions were P = 500, 1000, 1500, 2000, 2500, and 3000 N. The polyethylene material has Young's modulus E = 685 MPa and Poisson's ratio v = 0.4.…”

Section: Methodsmentioning

confidence: 99%

The effect of structural parameters of total hip arthroplasty on polyethylene liner wear behavior: A theoretical model analysis

Peng

Zhou

et al. 2020

Journal Orthopaedic Research

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Using large femoral heads in total hip arthroplasty (THA) has been widely advocated to improve the function and longevity of the components. However, increasing the head size has been shown to accelerate polyethylene liner wear. Few studies have investigated the effect of other important structural parameters (such as polyethylene liner thickness, metal cup size, head‐liner conformity, loading conditions, etc.) on the biomechanical functions of the THAs. In this study, an analytical model was used to evaluate the polyethylene liner wear characteristics of the THAs (defined using a biomechanical wear factor) with various structural parameters of the THAs and loading conditions. For all the THA systems examined in this study, under the same loading conditions, a larger head leads to increasing contact areas, lower contact stresses, and higher biomechanical wear factors. When the head size is fixed, a decrease in the polyethylene liner thickness or a decrease in the head‐liner conformity leads to higher peak contact stresses and smaller contact areas and consequently, lower biomechanical wear factors. This study provides a parametric analysis tool for the optimal design/selection of the THA systems and for prediction of early effects of various structural parameters on the biomechanical function (such as contact stresses) and longevity (such as polyethylene liner wear) of the THA systems.

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Effect of friction and clearance on kinematics and contact mechanics of dual mobility hip implant

Cited by 12 publications

References 25 publications

Running-in behavior of dual-mobility cup during the gait cycle: A finite element analysis

Running-in behavior of dual-mobility cup during the gait cycle: A finite element analysis

Effects of Daily Activities and Position on Kinematics and Contact Mechanics of Dual Mobility Hip Implant

The effect of structural parameters of total hip arthroplasty on polyethylene liner wear behavior: A theoretical model analysis

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