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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 1/2013

01-01-2013 | Knee

Digital planning of high tibial osteotomy. Interrater reliability by using two different software

Authors: Steffen Schröter, Christoph Ihle, Johannes Mueller, Philipp Lobenhoffer, Ulrich Stöckle, Ronald van Heerwaarden

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 1/2013

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Abstract

Purpose

The purpose of the study was to determine the interrater reliability as well as the correlation of mediCAD® and PreOPlan® in deformity analysis and digital planning of osteotomies.

Methods

Digital radiographs were obtained from 81 patients planned to undergo an open wedge high tibial osteotomy. The JPEG files of the radiographs were imported to landmark-based software. Deformity analysis and planning of correction were performed by 1 experienced and 2 unexperienced observers. Osteotomy planning was aimed at correction to the predefined mechanical tibiofemoral angle of 3° valgus leg alignment. The interrater reliability of measurements was assessed using intraclass correlation coefficients (ICCs) and the confidence interval.

Results

The ICC of PreOPlan® was from 0.841 (mechanical lateral distal femur angle) to 0.993 (wedge-angle) and from 0.896 (joint line convergence angle) to 0.995 (mechanical tibiofemoral angle) of mediCAD®. The ICC of height of wedge-base was 0.979 with PreOPlan® and 0.969 with mediCAD®. Comparing PreOPlan® and mediCAD®, the ICC of the height of wedge-base of the observers was 0.966, 0.956 and 0.969, respectively.

Conclusions

The results show a high interrater reliability of digital planning software. Experience of the observer had no influence on results. Furthermore, a high interrater reliability and correlation of digital planning specific parameters was found. Surgeons need to master limb geometry measurements and osteotomy planning on digital radiographs as digital planning reports are used for intercolleagual correspondence, teaching purposes and as medicolegal documents. The digital planning software tested agrees with the actual demands and could be recommended for deformity analysis and planning of osteotomies.

Level of evidence

Diagnostic studies, Level I.
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Metadata
Title
Digital planning of high tibial osteotomy. Interrater reliability by using two different software
Authors
Steffen Schröter
Christoph Ihle
Johannes Mueller
Philipp Lobenhoffer
Ulrich Stöckle
Ronald van Heerwaarden
Publication date
01-01-2013
Publisher
Springer-Verlag
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 1/2013
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-012-2114-3

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