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Axial parameters affecting lower limb alignment after high tibial osteotomy

M Terauchi¹, K Shirakura, Y Kobuna

¹Department of Orthopaedic Surgery, Gunma University School of Medicine, Japan.

Clinical Orthopaedics and Related Research

|August 1, 1995

Summary

Accurate high tibial osteotomy requires precise correction angles. Tibial axial alignment is key for postoperative femorotibial angle correction, especially in valgus knees.

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Area of Science:

Orthopedic Surgery
Biomechanics
Lower Limb Alignment

Background:

High tibial osteotomy (HTO) is a surgical procedure to correct knee alignment.
Accurate determination of the correction angle is crucial for successful HTO outcomes.
Understanding the relationship between limb alignment parameters and surgical correction is essential.

Purpose of the Study:

To identify a precise method for determining the correction angle in high tibial osteotomy.
To analyze the correlation between femorotibial angle and axial alignment parameters pre- and post-operatively.
To investigate the influence of femoral and tibial shaft angles on lower limb alignment after HTO.

Main Methods:

Analysis of lower limb alignment in 46 knees undergoing high tibial osteotomy.

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Measurement of femorotibial angle, femoral shaft-horizontal angle, and tibial shaft-horizontal angle pre- and post-operatively.

Correlation analysis to determine relationships between alignment parameters.

Main Results:

Postoperative femorotibial angle correlated with tibial shaft-horizontal angle but not femoral shaft-horizontal angle.
Postoperative femoral shaft-horizontal angle remained relatively constant irrespective of valgus degree.
Tibial axial alignment was a stronger influencer of the postoperative femorotibial angle in valgus knees.

Conclusions:

Tibial axial alignment is recommended as the primary parameter for determining HTO correction amounts.
The slope of the distal femoral articular surface is an important factor in preoperative planning.
Accurate correction angles improve outcomes in high tibial osteotomy for lower limb alignment.