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Related Experiment Video

Updated: Jun 8, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Computer-assisted high tibial osteotomy: preliminary results.

Raffaele Iorio1, Antonio Vadalà, Silvio Giannetti

  • 1Orthopaedic Unit and "Kirk Kilgour" Sports Injury Centre, S. Andrea Hospital, University of Rome, Sapienza, Italy.

Orthopedics
|October 20, 2010
PubMed
Summary

Navigation-assisted open-wedge high tibial osteotomy (HTO) improves mechanical axis correction accuracy and reduces tibial slope increase in varus knee deformity patients. This technique shows promising results for knee alignment correction.

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Medical Navigation Systems

Background:

  • Open-wedge high tibial osteotomy (HTO) is a standard surgical procedure for correcting symptomatic varus malaligned knees.
  • Accurate correction of the mechanical axis and control of the posterior tibial slope are crucial for successful HTO outcomes.
  • The use of navigation systems in orthopedic surgery aims to enhance precision and reproducibility of surgical procedures.

Purpose of the Study:

  • To prospectively evaluate the efficacy and accuracy of navigation system-supported open-wedge high tibial osteotomy (HTO) for treating varus knee deformity.
  • To assess the impact of navigation assistance on mechanical femorotibial angle correction and posterior tibial slope changes.
  • To compare clinical outcomes using validated patient-reported outcome measures.

Related Experiment Videos

Last Updated: Jun 8, 2026

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach
09:01

Treatment of Ankle Osteoarthritis with Total Ankle Replacement Through a Lateral Transfibular Approach

Published on: January 24, 2018

Main Methods:

  • Prospective follow-up of 13 patients (14 knees) undergoing navigation system-assisted open-wedge HTO for varus knee deformity.
  • Preoperative and postoperative assessments included physical examination, lower limb weight-bearing digital radiographs, and validated questionnaires (Modified Cincinnati Rating System, Knee Society Score).
  • Key radiographic parameters analyzed: Insall-Salvati index, posterior tibial slope angle, mechanical femorotibial angle, and inferior limb length.

Main Results:

  • All patients reported satisfactory clinical outcomes at a mean follow-up of 12.6 months.
  • Significant improvements were observed in the Modified Cincinnati Rating System (46.5 to 84.6) and Knee Society Score (51.4 to 85.1).
  • Navigation system data demonstrated accurate correction of the mechanical axis (from 6.3° varus to 2.1° valgus) with a minimal increase in posterior tibial slope (0.3° ± 0.4°).

Conclusions:

  • Navigation system-supported open-wedge HTO provides accurate mechanical axis correction for varus knee deformities.
  • The use of navigation technology appears to minimize the increase in posterior tibial slope compared to traditional methods.
  • Navigation assistance in HTO offers a promising approach for achieving improved surgical precision and patient outcomes in knee alignment correction.