CMM-Based Volumetric Assessment Methodology for Polyethylene Tibial Knee Inserts in Total Knee Replacement

Jiang, Wei; Ji, Cuicui; Zhang, Jin; Dai, Yuntian

doi:10.1155/2018/9846293

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…Hence, future studies will focus on applying the novel method to a large group of subjects to better understand the performance of hip prostheses. In addition, it would be advisable that the approach presented in the present study can be used in other prosthetic components with different geometries, such as knee and ankle replacements [10].…”

Section: Discussionmentioning

confidence: 99%

“…As an alternative, the coordinate measuring machine (CMM)‐based method has been widely developed for the assessment of wear in explanted components. The method refers to the reconstruction of the original surface and calculation of the wear based on the points taken from the bearing surface of the retrieved components [10]. The accuracy of the method largely relies on the successful identification and reconstruction of the original or pristine surface of the component.…”

Section: Introductionmentioning

confidence: 99%

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CMM‐based method for assessing the volume change of retrieved polyethylene cups in MoP total hip replacements

Hua

2020

Biosurface and Biotribology

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Wear occurring at the bearing surface and the consequent generation of wear debris has been identified as the primary cause of aseptic loosening in metal-on-polyethylene (MoP) hip joint replacements. The accurate estimation of volume change in polyethylene cups due to creep and wear is, therefore, an important step for identifying the cause of failure and improving the longevity of MoP prosthesis. The purposes of this study were to present and apply a coordinate measuring machine (CMM)-based method for assessing the volume change of retrieved components due to wear and creep by using a combination of CMM data and a bespoke computer programme. The method was firstly validated against the standard gravimetric technique, and then applied to four retrieved polyethylene cups for wear assessment and analysis. The results show that the volume changes calculated using the present method match well with those assessed through the gravimetric technique. The CMM-based method presented in the study is capable of effectively and reliably determining the volume change and characterising the wear patch of retrieved components from MoP hip joint replacements.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CMM‐based method for assessing the volume change of retrieved polyethylene cups in MoP total hip replacements

Hua

2020

Biosurface and Biotribology

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“…Quantifying such clinically relevant wear volumes would also benefit surgeons in the management of who, when and how to revise their patients. The concepts described in this method could also be useful in building on the previous work investigating the wear of knee replacements [33, 34].…”

Section: Discussionmentioning

confidence: 99%

Quantifying the bearing surface wear of retrieved hip replacements

Bergiers

Hothi

Richards

et al. 2019

Biosurface and Biotribology

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Accurate quantification of bearing material loss from retrieved metal-on-metal (MOM) hip replacements is key to understanding their failure. Geometric methods are currently the only means of estimating volumetric wear from retrieved implants and numerous contrasting approaches to obtain these measures have been published. Data collection strategies have been thoroughly discussed and refined to minimise the effect of error incurring factors; however, there is an opportunity to optimise the current methods of estimating the pre-wear geometry and, therefore, improve the accuracy of wear volume measurements. An automated analysis strategy to quantify volumetric wear is proposed in this study, which utilises the entire bearing surface to determine the implants pristine geometry. This involves the iterative removal of geometrically effected data points to optimise the fit and size of a perfect sphere. Once fitted, this reference geometry is compared with the measured data, in its entirety, to calculate the volume change representative of the quantity of material lost. Improving the reliability of this parameter could influence the care of a million patients that remain with MOM hip implants. Rigorous validation of this method will dominate future work, ensuring that the accuracy and reliability of this approach are sufficient to provide clinically meaningful data.

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“…In this study, a 5th order polynomial curve surface fitting algorithm (1) was applied for the generation of original 3-D surface on the basis of undeformed region, which proved its effectiveness and accuracy based on simulated volume removal and computational tests (maximum errors equal to 0.2 mm 3 and 1.1 mm 3 , resp.) [11]. Prior to the surface fitting process, the wear region should be distinguished and removed from the database for accurate original surface reconstruction, which was considered as prewear data for volumetric analysis.…”

Section: Methodsmentioning

confidence: 99%

Comparison of CMM and Micro-CT Volumetric Analysis of Polyethylene Tibial Knee Inserts in Total Knee Replacement

Jiang

Hua-xing

et al. 2018

International Journal of Polymer Science

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Ultrahigh molecular weight polyethylene (UHMWPE) bearings are used widely in orthopaedic joint replacement as a prominent material for improving the longevity, which is dramatically influenced by wear of polyethylene. Polyethylene tibial knee components from knee simulators under two different input conditions were analyzed using CMM and Micro-CT measurement techniques for volumetric loss with gravimetric measurement as reference. Based on the coordinates and image slices obtained, the surface curve fitting and image digitization methodology were used for the creation of nominal "original" surface in the case of no prewear data provided. The comparison results indicate that gravimetric remains the gold standard and the CMM measurement took less time and had better precision, accuracy, and repeatability compared to Micro-CT measurement technique.

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CMM-Based Volumetric Assessment Methodology for Polyethylene Tibial Knee Inserts in Total Knee Replacement

Cited by 3 publications

References 14 publications

CMM‐based method for assessing the volume change of retrieved polyethylene cups in MoP total hip replacements

CMM‐based method for assessing the volume change of retrieved polyethylene cups in MoP total hip replacements

Quantifying the bearing surface wear of retrieved hip replacements

Comparison of CMM and Micro-CT Volumetric Analysis of Polyethylene Tibial Knee Inserts in Total Knee Replacement

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