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Takagi H, Asai S, Sato A, et al. Case series report of navigation-based . Ann Med Surg (Lond). 2017;17:33-37doi: 10.1016/j.amsu.2017.03.032.
Takagi, H., Asai, S., Sato, A., Maekawa, M., Kawashima, H., & Kanzaki, K. (2017). Case series report of navigation-based . Annals of medicine and surgery (2012), 1733-37. https://doi.org/10.1016/j.amsu.2017.03.032
Takagi, Hiroshi, et al. "Case series report of navigation-based ." Annals of medicine and surgery (2012) vol. 17 (2017): 33-37. doi: https://doi.org/10.1016/j.amsu.2017.03.032
Takagi H, Asai S, Sato A, Maekawa M, Kawashima H, Kanzaki K. Case series report of navigation-based . Ann Med Surg (Lond). 2017 Mar 29;17:33-37. doi: 10.1016/j.amsu.2017.03.032. eCollection 2017 May. PMID: 28392915; PMCID: PMC5377241.
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Ann Med Surg (Lond). 2017 Mar 29;17:33-37. doi: 10.1016/j.amsu.2017.03.032. eCollection 2017 May.

Case series report of navigation-based .

Annals of medicine and surgery (2012)

Hiroshi Takagi, Soshi Asai, Atsushi Sato, Masahiko Maekawa, Humiyoshi Kawashima, Koji Kanzaki

Affiliations

  1. Department of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 Fujigaoka, Aoba-ku, Yokohama 227-8501, Japan.

PMID: 28392915 PMCID: PMC5377241 DOI: 10.1016/j.amsu.2017.03.032

Abstract

BACKGROUND: Simulations show that paradoxical anterior femoral slide in conventional dual radius total knee arthroplasty (TKA) is initiated by sudden reduction of the femoral radius from distal to posterior. Therefore, we hypothesized that a new TKA prosthesis design with a gradually reducing femoral radius may minimize the anterior slide in navigation-based

METHODS: A retrospective case series report was performed for 12 knees with osteoarthritis using a CT-free navigation system. Six knees received TKA using a prosthesis with a gradually reducing femoral radius (Attune CR) and the other 6 knees underwent TKA using a conventional dual radius design (PFCΣ CR). Anterior-posterior (AP) displacement of the medial and lateral femoral condyles relative to the tibia, and kinematic patterns of the femur throughout the range of motion were compared between the groups.

RESULTS: The average AP displacement in the Attune CR group indicated no paradoxical anterior movement of both condyles, and kinematic data showed a medial pivot pattern. In contrast, AP displacement in the PFCΣ CR group indicated that both condyles showed paradoxical anterior movement, and kinematically both condyles moved in the same manner, showing a parallel motion pattern.

CONCLUSION: TKA using a prosthesis with a gradually reducing radius minimized paradoxical anterior slide in navigation-based

Keywords: Condylar geometry; In vivo knee kinematics; Navigation system; Total knee arthroplasty

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