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Topography of the periacetabular bone in Chinese patients – do current cages fit?

Topography of the periacetabular bone in Chinese patients – do current cages fit?

Hip Int 2013; 23(4): 366 - 372

Article Type: ORIGINAL ARTICLE

Article Subject: Arthrophastry

DOI:10.5301/hipint.5000045

Authors

Dejin Yang, Yixin Zhou, Hongyi Shao, Qiheng Tang, Xinghua Yin

Corresponding author

  • Yixin Zhou
  • Department of Orthopeadics Beijing Jishuitan Hospital
  • Xinjiekou East Street Xicheng District Beijing, Beijing 100035, China
  • orthoyixin@yahoo.com

Abstract

Background: Understanding the anatomy of the periacetabular bone is critical for designing and implanting cages, as well as reconstruction of lost periacetabular bone. We aimed to study the topography of periacetabular bone and compare it with current cages to examine their fit in a Chinese population.

Methods: We performed three-dimensional measurement on computed tomography images of 105 hemipelves to delineate the topography of the periacetabular bone. We compared the bone with digital models of commercially available cages, and divided the results into three scenarios (fit, mismatch and unfit) according to absence or existence of overhang and the extent of contouring needed after implanting the cages to the pelves.

Results: Our measurement provided a representation of normal topography of the periacetabular bone. Only 21% of the patients studied had commercially available cages which fit their pelves, whilst there was no cage that fitted 59% of the patients even after extensive contouring.

Conclusion: Current acetabular cages have low fit rates for the periacetabular bone in Chinese patients.

Article History

Disclosures

Financial Support: None.
Conflict of Interest: None.

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Authors

Affiliations

  • Department of Orthopaedics, Beijing Jishuitan Hospital, Beijing - China

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