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Related Experiment Video

Updated: Jun 20, 2026

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
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Closed-wedge high tibial osteotomy using computer-assisted surgery compared to the conventional technique.

D K Bae1, S J Song, K H Yoon

  • 1Department of Orthopaedic Surgery, School of Medicine Kyung Hee University, 1 Hoeki-dong, Dongdaemun-ku, Seoul 130-702, Korea.

The Journal of Bone and Joint Surgery. British Volume
|September 2, 2009
PubMed
Summary

Computer-assisted surgery for high tibial osteotomy (HTO) improves accuracy and precision. This navigation technique offers reliable intra-operative data, leading to better outcomes in HTO procedures compared to conventional methods.

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Medical Technology

Background:

  • High tibial osteotomy (HTO) is a common surgical procedure to correct knee osteoarthritis.
  • Conventional HTO techniques can have variability in accuracy and precision.
  • Computer-assisted surgery (CAS) offers potential improvements in orthopedic procedures.

Purpose of the Study:

  • To compare the reliability, accuracy, and variability of CAS-assisted closed-wedge HTO versus the conventional technique.
  • To evaluate the intra-operative data provided by navigation systems in HTO.
  • To assess the impact of CAS on the precision of coronal alignment correction in HTO.

Main Methods:

  • A comparative study involving 100 patients undergoing closed-wedge HTO.

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  • 50 procedures utilized CAS with a navigation system.
  • 50 procedures used the conventional surgical technique.
  • Pre-operative and post-operative mechanical axis alignment was measured and compared between groups.

    • Main Results:

    • CAS group showed a mean correction angle significantly more accurate (p < 0.002).
    • Variability of correction was significantly lower in the CAS group (2.3 degrees vs 3.7 degrees, p = 0.012).
    • Positive correlation found between navigation data and radiographic measurements (r > 0.3, p < 0.05).

    Conclusions:

    • CAS provides reliable real-time intra-operative information during closed-wedge HTO.
    • Navigation systems may increase the accuracy of coronal alignment correction.
    • CAS improves the precision and reduces variability in closed-wedge HTO procedures.