Correlation of Anthropometric Measurements of Proximal Tibia in Iranian Knees with Size of Current Tibial Implants

Authors

  • Ali Birjandinejad Orthopedic Research Center, Shahid Kamyab Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
  • Elham karimi Department of Biology and Anatomical Sciences, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  • Mohsen Norouzian Department of Biology and Anatomical Sciences, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  • Reza Zandi Taleghani Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Abstract:

of the Caucasian population. The purpose of this study was to investigate the morphometry of the proximal tibia in thestandard resected surface of total knee arthroplasty (TKA).Methods: In this descriptive study, the anthropometric data of the proximal tibia were measured in 132 knees (80 malesand 52 females) using magnetic resonance imaging in 2015. The collected data included anteroposterior (AP) length,mediolateral (ML) width, medial AP, lateral AP, and aspect ratio (ML/AP). The medial and lateral AP distance to bonecenter was calculated for symmetry analysis. The morphometric data were also compared with the same dimensionsof four current tibial implants.Results: The mean age of the subjects was 38.26±11.45 year (age range: 20-60 years). The mean AP length andmean ML width in the resected surface of the bone, as well as the mean aspect ratio (ML/AP) of tibial bone in all thesubjects, were 46.53±4.05 mm, 73.36±6.86 mm, and 1.58±0.11, respectively. The mean values of medial and lateralAP distance up to bone center were 13.40±6.17 and 17.09±6.83 mm, respectively, indicating asymmetric proximal tibiain the study population.Conclusion: The measurements of anatomic shapes and dimensions of the proximal tibia revealed that women havesmaller dimensions than their male counterparts. Prostheses with smaller AP size tended to be undersized and largerAP size had a tendency towards overhang in the mediolateral dimension. The data and obtained results of this studycan be used as guidance on designing tibial implant components suitable for TKA in the Iranian population.Level of evidence: IV

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Journal title

volume 7  issue 4

pages  339- 345

publication date 2019-07-01

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