Wear in retrieved condylar knee arthroplasties

Blunn, Gordon; Joshi, Atul; Minns, R.J.; Lidgren, Lars; Lilley, Peter A.; L, Ryd; Engelbrecht, E; Walker, Peter S.

doi:10.1016/s0883-5403(97)90024-3

Cited by 175 publications

(31 citation statements)

References 19 publications

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“…The success rate of artificial joint replacement surgery has reached 90% [1]. Even so, there were functional failure, prosthesis loosening or dislocation and the excessive wear of prosthesis, and so forth, postoperatively [2, 3]. The main factors for operation failure, in addition to the pathological reasons, come from operative and prosthetic aspects.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Analysis on Biomechanical Dynamic Characteristics of Knee Flexion Movement under Squatting

Wang

Tao

Li³

et al. 2014

The Scientific World Journal

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The model of three-dimensional (3D) geometric knee was built, which included femoral-tibial, patellofemoral articulations and the bone and soft tissues. Dynamic finite element (FE) model of knee was developed to simulate both the kinematics and the internal stresses during knee flexion. The biomechanical experimental system of knee was built to simulate knee squatting using cadaver knees. The flexion motion and dynamic contact characteristics of knee were analyzed, and verified by comparing with the data from in vitro experiment. The results showed that the established dynamic FE models of knee are capable of predicting kinematics and the contact stresses during flexion, and could be an efficient tool for the analysis of total knee replacement (TKR) and knee prosthesis design.

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Section: Introductionmentioning

confidence: 99%

Modelling and Analysis on Biomechanical Dynamic Characteristics of Knee Flexion Movement under Squatting

Wang

Tao

Li³

et al. 2014

The Scientific World Journal

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“…1,9 The primary experimental difficulty in the in vivo tribological investigation of fabrication process on wear and implant performance, however, is the regulation and measurement of in vivo testing conditions; namely: surgical implantation and alignment, patient loading and activity, and the influence of implant design on wear and performance. Studies of retrieved implants that evaluate wear based on visual examination of surface damage, 10,11,14 dimensional and contour changes, 15 subsurface analysis, 3,10 surface area of damage on the implant, 10,15,16 and/or changes in surface morphology, 13,15 have established modes of wear and material damage in vivo. Because of the lack of knowledge of in vivo loading conditions, these retrieval analyses reveal little about the kinematic performance and wear rate over time.…”

Section: Introductionmentioning

confidence: 99%

Effects of in vitro wear of machined and molded UHMWPE tibial inserts on TKR kinematics

Benson

DesJardins

LaBerge

2001

J. Biomed. Mater. Res.

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The effect of manufacturing process on the wear and mechanical performance of a total knee replacement (TKR) design was investigated with the use of a force-controlled knee joint simulator. Ultra-high molecular weight polyethylene (UHMWPE) tibial inserts processed by direct compression molding from 1900H resin were compared to UHMWPE tibial inserts machined from a compression-molded sheet of GUR 1050. Both sets of components had the same posterior-cruciate-retaining geometry, and were identically aligned with cobalt-chromium-molybdenum alloy femoral components. Wear tests were conducted at a frequency of 1 Hz for 4 million cycles with the use of a standard walking cycle pattern. Implant kinematics, including anterior-posterior (AP) displacement and internal-external (IE) rotation in response to applied loads were monitored. Gravimetric wear, surface roughness, and surface morphology were used to characterize the wear process of the UHMWPE inserts. Results showed that the molded UHMWPE inserts exhibited less gravimetric wear over time than the machined inserts of the same design. Both the machined and molded components exhibited scratching, pitting, and burnishing over their wear areas. The AP displacement distance per cycle of the molded tibial inserts decreased over the course of testing, resulting in a shorter total testing displacement for this group compared to machined tibial inserts. Although AP displacement distance per cycle for machined tibial inserts did not change significantly over the course of testing, their position relative to the femoral components shifted posteriorly over time, resulting in an elongated wear track.

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“…This suggests a more uniform motion in this group. A more uniform motion may reduce wear of the polyethylene, due to a reduction in shear forces at the liner interface [6, 19]. …”

Section: Discussionmentioning

confidence: 99%

No differences in in vivo kinematics between six different types of knee prostheses

Wolterbeek

Nelissen

Valstar

2011

Knee Surg Sports Traumatol Arthrosc

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PurposeThe aim of this study was to compare a broad range of total knee prostheses with different design parameters to determine whether in vivo kinematics was consistently related to design. The hypothesis was that there are no clear recognizable differences in in vivo kinematics between different design parameters or prostheses.MethodsAt two sites, data were collected by a single observer on 52 knees (49 subjects with rheumatoid arthritis or osteoarthritis). Six different total knee prostheses were used: multi-radius, single-radius, fixed-bearing, mobile-bearing, posterior-stabilized, cruciate retaining and cruciate sacrificing. Knee kinematics was recorded using fluoroscopy as the patients performed a step-up motion.ResultsThere was a significant effect of prosthetic design on all outcome parameters; however, post hoc tests showed that the NexGen group was responsible for 80% of the significant values. The range of knee flexion was much smaller in this group, resulting in smaller anterior-posterior translations and rotations.ConclusionDespite kinematics being generally consistent with the kinematics intended by their design, there were no clear recognizable differences in in vivo kinematics between different design parameters or prostheses. Hence, the differences in design parameters or prostheses are not distinct enough to have an effect on clinical outcome of patients.Level of evidenceTherapeutic study, Level III.

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Wear in retrieved condylar knee arthroplasties

Cited by 175 publications

References 19 publications

Modelling and Analysis on Biomechanical Dynamic Characteristics of Knee Flexion Movement under Squatting

Modelling and Analysis on Biomechanical Dynamic Characteristics of Knee Flexion Movement under Squatting

Effects of in vitro wear of machined and molded UHMWPE tibial inserts on TKR kinematics

No differences in in vivo kinematics between six different types of knee prostheses

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