Automated assessment of polyethylene wear in cemented acetabular components using anteroposterior radiographs of total hip replacements

Kerrigan, Casey; McKenna, Stephen J.; Ricketts, Ian W.; Wigderowitz, C.

doi:10.1016/j.compmedimag.2007.12.002

Cited by 7 publications

(3 citation statements)

References 51 publications

(37 reference statements)

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“…The usefulness of the PolyWare programme in THA has previously been reported [ 18 – 20 ]. The PolyWare programme has been used practically to accurately measure the wear of polyethylene liners in THA [ 34 , 35 ]. The precise orientation of the acetabular component must be determined to accurately measure the wear of the polyethylene liners.…”

Section: Discussionmentioning

confidence: 99%

The best method for evaluating anteversion of the acetabular component after total hip arthroplasty on plain radiographs

et al. 2018

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BackgroundSeveral radiological methods for measuring the anteversion of the acetabular component after total hip arthroplasty (THA) exist, and no single standardized method has been established. We evaluated the reliability and accuracy of six widely utilized methods (Liaw et al., Lewinnek et al., Widmer, Hassan et al., Ackland et al., and Woo and Morrey) for measuring anteversion on plain radiographs, using a reference standard in the same definition obtained from the PolyWare programme.MethodsWe reviewed 71 patients who underwent primary unilateral THA. The anteversion of the acetabular component was measured on pelvis AP radiographs using five different methods (Liaw et al., Lewinnek et al., Widmer, Hassan et al., and Ackland et al.) and on cross-table lateral radiographs using the method of Woo and Morrey. The values obtained using the PolyWare programme, which determines the anteversion of the acetabular component by edge detection, were regarded as the reference standard.ResultsIntra- and inter-observer reliabilities were excellent for all methods using plain radiographs, including the PolyWare programme. The method of Liaw et al. obtained values similar to those obtained using the PolyWare programme and was thus considered accurate (P = 0.447). However, values obtained using the other five methods significantly differed from those obtained using the PolyWare programme and were thus considered less accurate (P < 0.001, P < 0.001, P < 0.001, P = 0.007, and P < 0.001, respectively).ConclusionThe method of Liaw et al. is more accurate than other methods using plain radiographs for the measurement of the anteversion of the acetabular component after THA, with reference to the anteversion obtained from the PolyWare programme.

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Section: Discussionmentioning

confidence: 99%

The best method for evaluating anteversion of the acetabular component after total hip arthroplasty on plain radiographs

et al. 2018

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“…Using this method, the relationship between the measurement errors caused by the X-ray offset and the true cup orientation was established and simulated. In a study of the radiographic assessment of cup wear, Stuart Kerrigan introduced the cone model to calculate the RA/ RI angles of the cup and their true value in 3D space (95). Nevertheless, to reduce the computational difficulty, a simplified situation was simulated with the X-ray beam source directing at the cup's centre, which was similar to the hip-centred AP radiograph.…”

Section: Mathematical Methodsmentioning

confidence: 99%

Radiographic assessment of the cup orientation after total hip arthroplasty: a literature review

Zhao¹,

Su²,

Zhao³

et al. 2020

Ann Transl Med

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Optimal acetabular cup orientation is of substantial importance to good long-term function and low complication rates after total hip arthroplasty (THA). The radiographic anteversion (RA) and inclination (RI) angles of the cup are typically studied due to the practicability, simplicity, and ease of interpretation of their measurements. A great number of methods have been developed to date, most of which have been performed on pelvic or hip anteroposterior radiographs. However, there are primarily two influencing factors for these methods: X-ray offset and pelvic rotation. In addition, there are three types of pelvic rotations about the transverse, longitudinal, and anteroposterior axes of the body. Their effects on the RA and RI angles of the cup are interactively correlated with the position and true orientation of the cup. To date, various fitted or analytical models have been established to disclose the correlations between the X-ray offset and pelvic rotation and the RA and RI angles of the cup. Most of these models do not incorporate all the potential influencing parameters. Advanced methods for performing X-ray offset and pelvic rotation corrections are mainly performed on a single pelvic AP radiograph, two synchronized radiographs, or a two-dimensional/three-dimensional (2D-3D) registration system. Some measurement systems, originally developed for evaluating implant migration or wear, could also be used for correcting the X-ray offset and pelvic rotation simultaneously, but some drawbacks still exist with these systems. Above all, the 2D-3D registration technique might be an alternative and powerful tool for accurately measuring cup orientation.In addition to the current methods used for postoperative assessment, navigation systems and augmented reality are also used for the preoperative planning and intraoperative guidance of cup placement. With the continuing development of artificial intelligence and machine learning, these techniques could be incorporated into robot-assisted orthopaedic surgery in the future.

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“…In vivo detekce je založena na několika teoretických principech, jako jsou např. koncentrické kruhy, směrodatné vektory, aktivní tvarové modely či aktivní elipsy (11,14,20,25). Při in vitro stanovování otěru jsou k určování úbytku materiálu využívány ověřené fyzikální metody (9,18) či speciální měřicí přístroje s nezbytným matematickým aparátem (19).…”

Section: Původní Práce Original Paperunclassified

Measurement of Acetabular Polyethylene Wear, Using a Universal Measuring Microscope, in Total Hip ReplacementIntra- and Inter-Observer Measurement Variability

Gallo¹,

Havranek²,

Zapletalová³

et al. 2006

ACHOT

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PURPOSE OF THE STUDYThe aim of the study was to present our own method of measuring acetabular polyethylene wear in total hip arthroplasty, including assessment of basic measurement characteristics. It is a well known fact that, in total hip replacement, polyethylene liners wear out with use. The rate of acetabular polyethylene wear can then be related to clinical or demographic data. MATERIAL AND METHODSOur method, using a universal measuring microscope, is based on the ability of exact identification of central positions of the head of total hip replacement before implantation and after prosthesis removal. The difference between the original and final positions allows us to calculate both linear and volumetric wear of polyethylene. During one month, the same components were repeatedly measured by two independent investigators and a total of 10 ABG 1 acetabular components were checked. The results of measurements were evaluated by a series of statistical tests, including correlation and regression analyses and analysis of variance. RESULTSHigh correlations were found among individual measurements made by each observer (r = 0.998; r = 0.973) as well as between the mean values obtained from the two observers (r = 0.996). The reliability of measurements was proved by a high correlation of the regression curve of each measurement with the "ideal" line. With two exceptions, the differences between paired measurements were not significant. CONCLUSIONSOur method facilitates an in vitro measurement of polyethylene wear with considerable accuracy and high reliability.

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Automated assessment of polyethylene wear in cemented acetabular components using anteroposterior radiographs of total hip replacements

Cited by 7 publications

References 51 publications

The best method for evaluating anteversion of the acetabular component after total hip arthroplasty on plain radiographs

The best method for evaluating anteversion of the acetabular component after total hip arthroplasty on plain radiographs

Radiographic assessment of the cup orientation after total hip arthroplasty: a literature review

Measurement of Acetabular Polyethylene Wear, Using a Universal Measuring Microscope, in Total Hip ReplacementIntra- and Inter-Observer Measurement Variability

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