J Knee Surg
DOI: 10.1055/s-0042-1756502
Original Article

Effects of Femoral Component Design on the Deepest Point Position of the Trochlear Grove in Kinematically Aligned Total Knee Arthroplasty: A Comparison of Four Prothesis Designs

Yoshinori Takashima
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
Naoki Nakano
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
Kazunari Ishida
2   Department of Orthopedic Surgery, Kobe Kaisei Hospital, Kobe, Japan
,
Tomoyuki Kamenaga
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
Yuichi Kuroda
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
Shinya Hayashi
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
Ryosuke Kuroda
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
,
1   Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
› Author Affiliations
Funding None.

Abstract

The aim of the study is to explore and compare the differences in trochlear shape and knee anatomy between four types of prostheses and preoperative native knee matched with preoperative computed tomography (CT). Thirty patients were scheduled for primary kinematically aligned total knee arthroplasty (TKA) for varus knee osteoarthritis at our hospital and the region between their pelvis to ankle joint was simulated using a CT-based three-dimensional planning software. The axial plane containing the transepicondylar axis was set as Slice A, and the 10-mm distal plane from Slice A was set as Slice B. The distances to the deepest trochlear groove between the native knee and each prosthesis and the medial and lateral facet heights were compared among the four groups. The deepest femoral trochlear groove of the prostheses was located 1.6 to 3.0 mm more medial than that of the native knee, and in the Persona group, it was significantly more medial than in the e-motion or Triathlon groups on both Slices A and B. The native knee and the medial and lateral facet heights of the four prostheses on both Slices A and B were significantly lower than those of preoperative native knees when femoral prostheses were set in the kinematically aligned (KA)-TKA position. The deepest point of the trochlear groove of the Persona group was the most medial among the four prostheses studied, and the deepest points differed depending on the prosthesis design in KA-TKA. Thus, surgeons should carefully select the type of prostheses used in KA-TKA.

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Institutional Review Board approval for the study was provided by Kobe University Graduate School of Medicine (No. 170000).


Authors' Contributions

All authors, specifically M.T., N.N., and Y.T. have made substantial contributions to the conception and design, drafting the article or revising it critically for important intellectual content. All authors contributed toward acquisition of data, or analysis and interpretation of data and final approval of the version to be submitted.


Availability of Data and Material

The datasets during and/or analyzed during the current study available from the corresponding author on reasonable request.


Consent to Participate

Informed consent was obtained from all individual participants included in the study.




Publication History

Received: 30 November 2021

Accepted: 26 July 2022

Article published online:
23 September 2022

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