Correlation between computed tomography value of the proximal tibia and general bone mineral density

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  • YAGI Tomonori
    Department of Orthopedic Surgery, Yagi Orthopedic Hospital
  • YASUDA Kazunori
    Department of Orthopedic Surgery, Yagi Orthopedic Hospital
  • ONODERA Shin
    Department of Orthopedic Surgery, Yagi Orthopedic Hospital
  • UEDA Daisuke
    Department of Orthopedic Surgery, Yagi Orthopedic Hospital
  • ONODERA Jun
    Department of Orthopedic Surgery, Yagi Orthopedic Hospital
  • YABUUCHI Koji
    Department of Orthopedic Surgery, Yagi Orthopedic Hospital
  • MISAKI Yusuke
    Department of Clinical Laboratory Center, Yagi Orthopedic Hospital
  • KONDO Eiji
    Center for Sports Medicine, Hokkaido University

Bibliographic Information

Other Title
  • 脛骨近位部CT値と骨密度の関係─人工膝関節全置換術におけるセメントレス固定の判断の指標─
  • 脛骨近位部CT値と骨密度の関係 : 人工膝関節全置換術におけるセメントレス固定の判断の指標
  • ケイコツ キン イブ CTチ ト コツミツド ノ カンケイ : ジンコウ シツカンセツ ゼン チカンジュツ ニ オケル セメントレス コテイ ノ ハンダン ノ シヒョウ

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Abstract

<p>Purpose: Although cementless implant components are commonly used in total knee arthroplasty (TKA), cemented implant fixation is required in osteoporotic patients. We examined the use of x-ray quantitative computed tomography (QCT) to assess the bone mineral density (BMD) of the proximal tibia to determine the optimal type of fixation for TKA in individual patients.</p><p>Materials and Methods: In patients undergoing TKA between June 2017 and September 2018, QCT of the proximal tibia and BMD measurement of the spine and proximal femur were performed. Cementless fixation was performed in 110 knees and cemented fixation was performed in 15 knees of the patients.</p><p>Results: The mean CT value of the proximal tibia was 75.5. The CT value showed correlations with BMD of the spine and proximal femur, with correlation coefficients of 0.61 and 0.69, respectively. The mean CT value of the proximal tibia was 80.5 in patients with cementless fixation and 39.4 in those with cemented fixation.</p><p>Discussion: The CT value of the proximal tibia correlated with the BMD of the proximal femur. </p><p>Conclusion: QCT is a suitable method to evaluate local BMD in the proximal tibia and to determine a good implant fixation method.</p>

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