P-ISSN: 2707-8345, E-ISSN: 2707-8353
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International Journal of Case Reports in Orthopaedics
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International Journal of Case Reports in Orthopaedics

2021, Vol. 3, Issue 1, Part A

A computer-assisted navigation technique for complex primary knee arthroplasty with intra-articular bone defect and instability: A case report and literature review


Author(s): Norawee Wainipitapong

Abstract: Correction of a combined severe varus, bone defect, and ligamentous instability in a complex primary knee replacement is a technically demanding procedure. In such instances, constrained or rotating-hinge prosthesis is usually considered. Computer-assisted surgery in extra-articular deformity correction is a widely accepted and advantageous approach, but difficult to apply for intra-articular deformity due to difficulties with defining anatomical references. Our case report describes a patient with severe osteoarthritis, with intra-articular bone defects and ligament instability. We performed a computer-assisted navigation technique by combining gap balancing and measured resection techniques, with a metaphyseal sleeve as a new joint-line reference. We used an unconstrained posterior-stabilized (PS) prosthesis, incorporating Knee Society Scores (KSS): KSS-knee and KSS-function improved from 0–91 and 5–85, respectively, at one-month postoperatively. Our technique exhibited good short-term clinical outcomes and may decrease the requirement for constrained or rotating-hinge prostheses in a complex primary case.

DOI: 10.22271/27078345.2021.v3.i1a.45

Pages: 24-30 | Views: 271 | Downloads: 122

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How to cite this article:
Norawee Wainipitapong. A computer-assisted navigation technique for complex primary knee arthroplasty with intra-articular bone defect and instability: A case report and literature review. Int J Case Rep Orthop 2021;3(1):24-30. DOI: 10.22271/27078345.2021.v3.i1a.45


International Journal of Case Reports in Orthopaedics