Novel application of 3D printing to development of a homemade posterior-stabilized knee cement spacer

Publication in refereed journal

CUHK Authors

Professor CHUI Chun Sing (Department of Orthopaedics and Traumatology)

Mr. MAK Ka Kwan (Department of Orthopaedics and Traumatology)

Professor CHOW Kwoon Ho Simon (Department of Orthopaedics and Traumatology)

Professor WONG Ronald Man Yeung (Department of Orthopaedics and Traumatology)

Professor LAW Sheung Wai (Department of Orthopaedics and Traumatology)

Professor ONG Michael Tim Yun (Department of Orthopaedics and Traumatology)

Professor CHEUNG Wing Hoi (Department of Orthopaedics and Traumatology)

Professor YUNG Shu Hang Patrick (Department of Orthopaedics and Traumatology)

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https://www.clinicsinsurgery.com/abstract.php?aid=8265

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AbstractBackground: Articulating spacer facilitates reimplantation in two stage revision for knee periprosthetic infection. However, despite the prevalence of posterior stabilizing prostheses, most commercial prefabricated spacers are cruciate retaining with the problem of sagittal instability. This study reported the design and use of a novel intra-operatively molded, posterior stabilizing spacer developed in hospital setting using 3D printing technology. Method: The design began with analysis of our hospital joint registry to identify commonly used models and sizes. Features of the 4 most commonly used models were incorporated into the design of the new spacer using computer aided design software. Three sets of dimensions were identified to form the 3 sizes of the new spacer. The prototype was output with 3D printing for producing mold for intra-operative use. Case Report: A 68 years old lady was suffering from recurrent periprosthetic infection 6 months after right total knee arthroplasty. Two stage revisions were performed with the new spacer. Postoperative X-ray showed optimal fitting with the absence of posterior sagging. Conclusion: The 3D printing technology has enabled the domestic development of cement spacer with personalized design, minimal inventory and improved stability.

Acceptance Date06/12/2021

All Author(s) ListElvis Chun-Sing Chui, Lawrence Chun-Man Lau, Xin Ye, Kyle Ka-Kwan Mak, Ka-Bon Kwok, Kwoon-Ho Chow, Ronald Man-Yeung Wong, Sheung-Wai Law, Michael TimYun Ong, Louis Wing-Hoi Cheung, Patrick Shu-Hang Yung

Journal nameClinics In Surgery

Year2021

Month12

Day14

Volume Number6

Issue Number1

PublisherRemedy Publications

Place of PublicationUSA

Article number3385

ISSN2474-1647

LanguagesEnglish-United States

KeywordsPeriprosthetic infection, Knee, Arthroplasty, Spacer, Computer aided design, 3D printing

Most Relevant Area

Artificial intelligence (Computer science)

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