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Clinical Implications of Anthropometric Patellar Dimensions for TKA in Asians

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Clinical Orthopaedics and Related Research

Abstract

Anthropometric patellar dimensions can influence implant design and surgical techniques in patellar resurfacing for TKA. We measured anthropometric patellar dimensions in 752 osteoarthritic knees (713 in females and 39 in males) treated with TKA in 466 Korean patients and compared them with reported dimensions for Western patients. We investigated the effects of postoperative overall thickness deviations, residual bony thickness after bone resection, and postoperative deviations of component center positions from median ridge positions versus clinical and radiographic outcomes evaluated 1 year after surgery. Korean patients undergoing TKA had thinner and smaller patellae than Western patients. We found no associations between preoperative to postoperative overall thickness differences and clinical and radiographic outcomes and no differences between knees with a residual bony thickness 12 mm or greater and knees with a residual thickness less than 12 mm, with the exception of WOMAC pain scores. We found no associations between postoperative deviations of component center position and clinical or radiographic outcomes. Our findings indicate bone resection for patellar resurfacing can be flexible without jeopardizing clinical outcome.

Level of Evidence: Level IV, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.

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Acknowledgments

We thank Dr. Sung Ju Kim (Department of Statistics, Korea University, Seoul, Korea) for help with statistical analyses.

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Authors and Affiliations

  1. Joint Reconstruction Center, Seoul National University Bundang Hospital, 300 Gumidong, Bundangu, Seongnam-si, Gyunggido, 463-707, South Korea

    Tae Kyun Kim MD, PhD, Byung June Chung MD, Yeon Gwi Kang BS & Chong Bum Chang MD, PhD

  2. Department of Orthopaedic Surgery, Seoul National University College of Medicine, Seoul, South Korea

    Tae Kyun Kim MD, PhD, Chong Bum Chang MD, PhD & Sang Cheol Seong MD, PhD

Authors
  1. Tae Kyun Kim MD, PhD
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  2. Byung June Chung MD
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  3. Yeon Gwi Kang BS
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  4. Chong Bum Chang MD, PhD
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  5. Sang Cheol Seong MD, PhD
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Corresponding author

Correspondence to Tae Kyun Kim MD, PhD.

Additional information

One or more of the authors (TKK, CBC) have received funding from the clinical research fund (B-0708/048-103) of Seoul National University Bundang Hospital.

Each author certifies that his or her institution has approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent was obtained.

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Kim, T.K., Chung, B.J., Kang, Y.G. et al. Clinical Implications of Anthropometric Patellar Dimensions for TKA in Asians. Clin Orthop Relat Res 467, 1007–1014 (2009). https://doi.org/10.1007/s11999-008-0557-0

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  • DOI: https://doi.org/10.1007/s11999-008-0557-0

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