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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Related Experiment Video

Updated: May 23, 2025

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
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Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy

Published on: February 17, 2023

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Bilateral same-day transtrochanteric rotational osteotomy using computed tomography-based navigation: a case report.

Minoru Watanabe1, Satoshi Kagaya2, Daichi Kuzushima2

  • 1Department of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 Fujigaoka Aoba-ku, Yokohama, 227-8501, Japan. minoruwa@med.showa-u.ac.jp.

BMC Musculoskeletal Disorders
|March 12, 2025
PubMed
Summary
This summary is machine-generated.

This study demonstrates that using 3D CT-based navigation for bilateral transtrochanteric rotational osteotomy (TRO) in osteonecrosis of the femoral head (ONFH) allows for precise osteotomy line determination, enabling same-day bilateral surgery and faster patient recovery.

Keywords:
Bilateral osteonecrosis of the femoral headBilateral same-day surgeryCASCT-based navigationJoint-preserving surgeryReturn to workTranstrochanteric posterior rotational osteotomy

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Area of Science:

  • Orthopedic Surgery
  • Medical Imaging
  • Biomechanical Engineering

Background:

  • Transtrochanteric rotational osteotomy (TRO) for osteonecrosis of the femoral head (ONFH) is technically challenging.
  • Accurate determination of the osteotomy line is crucial for successful outcomes.
  • Existing methods can be complex, leading to variable results.

Purpose of the Study:

  • To report the use of a 3D CT-based navigation system for TRO in a patient with bilateral ONFH.
  • To evaluate the feasibility and outcomes of same-day bilateral TRO using this technology.
  • To assess the impact of navigation-assisted surgery on patient recovery and functional scores.

Main Methods:

  • A 24-year-old male with alcohol-related ONFH underwent bilateral TRO on the same day.
  • The Stryker OrthoMap® 3D CT-based navigation system was used to determine the osteotomy line.
  • Postoperative recovery, return to work, and functional scores were monitored.

Main Results:

  • The osteotomy line was accurately determined using the 3D CT-based navigation system, matching preoperative plans.
  • The patient achieved full weight-bearing at 6 months and returned to work within 8 months.
  • Functional scores significantly improved: VAS from 90 to 12 mm and JHSHQ from 31 to 59 points.

Conclusions:

  • This is the first report of same-day bilateral TRO for bilateral ONFH using CT-based navigation.
  • CT-based navigation facilitates accurate osteotomy planning, potentially reducing operative time and blood loss.
  • This approach may encourage patients to undergo bone-preserving surgery by enabling earlier return to work and societal reintegration.