A simplified guide ruler from numeric table method in doing rotational osteotomy

Chen Kun Liaw, Rong Sen Yang, Sheng Mou Hou, Tai Yin Wu, Chiou Shann Fuh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Background. Kobeljić et al. recently reported a numeric table method to provide precise rotational osteotomy which is a well established orthopaedic procedure. The numeric table requires four pages in length that is rather inconvenient during performing an osteotomy operation Methods. We thus develop our own method by summarizing the data of the four-page table into a small ruler, which is easy to carry and use in operation room. An electrical version of this ruler is also available. We also build a computer model to verify Kobeljić et al. method. Results. The error of Kobeljić et al. is between -37% to 16% (mean ± SD = -6% ± 9%). We verify our ruler by calculating the absolute difference between our method and that of Kobeljić et al. The difference is less than 0.1 mm. Conclusion. Our ruler is convenient for practical use for the rotational osteotomy procedure with equal precision. Further clinical verification is needed to justify its real significance.

Original languageEnglish
Article number87
JournalBMC Musculoskeletal Disorders
Publication statusPublished - Jul 7 2008
Externally publishedYes

ASJC Scopus subject areas

  • Rheumatology
  • Orthopedics and Sports Medicine


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