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J Knee Surg 2022; 35(14): 1595-1603
DOI: 10.1055/s-0041-1729549
Original Article

Early Aseptic Loosening with Increased Presence and Severity of Backside Burnishing in the Optetrak Logic Posterior-Stabilized Total Knee Arthroplasty Femoral Component

Michael-Alexander Malahias
1   The Stavros Niarchos Foundation Complex Joint Reconstruction Center, Hospital for Special Surgery, New York City, New York
,
David A. Iacobelli
2   Adult Reconstruction and Joint Replacement, Hospital for Special Surgery, New York City, New York
,
Lisa Torres
3   Department of Biomechanics, Hospital for Special Surgery, New York City, New York
,
Carolena Rojas Marcos
1   The Stavros Niarchos Foundation Complex Joint Reconstruction Center, Hospital for Special Surgery, New York City, New York
,
Allina A. Nocon
1   The Stavros Niarchos Foundation Complex Joint Reconstruction Center, Hospital for Special Surgery, New York City, New York
,
Timothy M. Wright
3   Department of Biomechanics, Hospital for Special Surgery, New York City, New York
,
Peter K. Sculco
1   The Stavros Niarchos Foundation Complex Joint Reconstruction Center, Hospital for Special Surgery, New York City, New York
,
Thomas P. Sculco
1   The Stavros Niarchos Foundation Complex Joint Reconstruction Center, Hospital for Special Surgery, New York City, New York
› Author Affiliations Funding T.M.W. reports grants from Orthobond; personal fees from Exactech; and other from AJRR, OREF, and Knee Society outside the submitted work. T.P.S. reports grants from Intellijoint; and personal fees from Lima Corporate, DePuy; and grants from EOS Imaging outside the submitted work.
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Abstract

Concerns persist that the Optetrak Logic posterior-stabilized (PS) total knee arthroplasty (TKA) femoral component might correlate with early failures due to aseptic loosening. The primary aim of this study was to examine if the use of the Optetrak Logic PS femoral component is associated with early (<5 years) and more extensive aseptic loosening compared with other PS femoral components. This is a single-institution retrieval analysis and revision registry study (based on prospectively collected data) of 27 failed primary PS TKA patients with loose femoral components that underwent revision TKAs between 2016 and 2019. Patients were stratified by components type: Group A (n = 16) received the Optetrak Logic PS femoral component, while Group B (n = 11) received other PS femoral components. Burnishing (macroscopic polishing of the component's backside) was observed and graded as a marker for relative motion at the cement-implant interface. No significant differences were found between the two groups regarding the baseline demographic, radiographic, and clinical characteristics. Mean length of implantation for Group A (3.8 ± 2.9 years) was significantly shorter (p < 0.001) than that of Group B (12.0 ± 6.7 years). A significant difference (p = 0.009) was found in presence of backside femoral burnishing between Group A (15 of 16 patients; 93.8%) and group B (5 of 11 patients; 45.6%). Furthermore, we found a significant difference (p < 0.001) in the severity of burnishing between Group A (13 of 16 patients with severe degree of burnishing; 81.3%) and Group B (1 of 11 patients with severe degree of burnishing; 9.1%). In contrast to Group B, a distinctive macroscopic pattern found in Logic retrieved femoral components (Group A) was the total absence of cement in the backside surface. The use of the Optetrak Logic PS TKA femoral component was associated with early aseptic loosening and increased presence and severity of backside burnishing with early cement-implant interface debonding compared with other commercially available types of PS TKA femoral components. The earlier failure rate with this implant is of concern.

Keywords

total knee arthroplasty - femoral aseptic loosening - Exactech Optetrak - revision arthroplasty - retrieval analysis


Publication History

Received: 11 August 2020

Accepted: 12 March 2021

Article published online:
30 April 2021

© 2021. Thieme. All rights reserved.

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