Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2017 Mar 30;10(4):364.
doi: 10.3390/ma10040364.

Wear Distribution Detection of Knee Joint Prostheses by Means of 3D Optical Scanners

Saverio Affatato  1 , Maria Cristina Valigi  2 , Silvia Logozzo  3   4
Affiliations

Wear Distribution Detection of Knee Joint Prostheses by Means of 3D Optical Scanners

Saverio Affatato et al. Materials (Basel). .

Abstract

The objective of this study was to examine total knee polyethylene inserts from in vitro simulation to evaluate and display-using a 3D optical scanner-wear patterns and wear rates of inserts exposed to wear by means of simulators. Various sets of tibial inserts have been reconstructed by using optical scanners. With this in mind, the wear behavior of fixed and mobile bearing polyethylene knee configurations was investigated using a knee wear joint simulator. After the completion of the wear test, the polyethylene menisci were analyzed by an innovative 3D optical scanners in order to evaluate the 3D wear distribution on the prosthesis surface. This study implemented a new procedure for evaluating polyethylene bearings of joint prostheses obtained after in vitro wear tests and the proposed new approach allowed quantification of the contact zone on the geometry of total knee prostheses. The results of the present study showed that mobile TKPs (total knee prosthesis) have lower wear resistance with respect to fixed TKPs.

Keywords: 3D scanners; 3D wear map; knee joint; prostheses design; wear inspection.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Total knee prosthesis (TKP) fixed and mobile design used in this study.
Figure 2
Figure 2
ScanRider 3D, automated metrological optical scanner while scanning a mobile meniscus.
Figure 3
Figure 3
Unworn portions (grey areas) taken into account for the alignment.
Figure 4
Figure 4
Wear trend and linear regression of the different fixed and mobile TKP configurations during the wear test.
Figure 5
Figure 5
3D wear map of the TKP mobile meniscus #1.
Figure 6
Figure 6
3D wear map of the fixed meniscus #4: in part a, the 3D wear map of the entire prosthesis is shown; in part b, the 3D wear map of the butterfly region is shown.
Figure 7
Figure 7
3D wear map of the fixed meniscus #2: in part a, the 3D wear map of the entire prosthesis is shown; in part b, the 3D wear map of the butterfly region is shown.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Affatato S., Bracco P., Costa L., Villa T., Quaglini V., Toni A. In vitro wear performance of standard, crosslinked, and vitamin-E-blended UHMWPE. J. Biomed. Mater. Res. A. 2012;100:554–560. doi: 10.1002/jbm.a.33297. - DOI - PubMed
    1. Grillini L., Affatato S. How to measure wear following total hip arthroplasty. Hip Int. 2013;23:233–242. doi: 10.5301/hipint.5000003. - DOI - PubMed
    1. Huang C.-H., Liau J.-J., Cheng C.-K. Fixed or mobile-bearing total knee arthroplasty. J. Orthop. Surg. Res. 2007;2:1–8. doi: 10.1186/1749-799X-2-1. - DOI - PMC - PubMed
    1. Bills P., Blunt L., Jiang X. Development of a technique for accurately determining clinical wear in explanted total hip replacements. Wear. 2007;263:1133–1137. doi: 10.1016/j.wear.2007.01.054. - DOI
    1. Carmignato S., Balcon M., Zanini F. Investigation on the Accuracy of CT Measurements for Wear Testing of Prosthetic Joint Components; Proceedings of the 5th Conference on Industrial Computed Tomography (iCT) 2014; Wels, Austria. 25–28 February 2014.

LinkOut - more resources