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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 12/2012

01-12-2012 | Knee

CT measurements prior to computer-assisted total knee arthroplasty do not improve rotational placement of the femoral component

Author: A. de Ladoucette

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 12/2012

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Abstract

Purpose

The aim of this study is to determine whether computer-assisted surgery (CAS) can gain more precision by utilizing information from pre-operative computed tomography (CT).

Methods

Sixty-five patients undergoing total knee arthroplasty in 2008 were included. On pre- and post-operative CT, epicondylar and posterior condylar lines were drawn and the posterior condylar angle between these two lines measured. During the surgery, epicondylar and posterior condylar lines were also registered before and after CAS-guided cuts were made. CAS was used to fix the orientation of the cutting guide on the distal femur at 3° of external rotation from the posterior condylar line.

Results

There was no correlation between CT measurements and CAS measurements. All orientations of the lines (relative to the horizontal) and angles measured using CT were significantly different (p < 0.05).

Conclusion

No relationship was found between pre-operative CT measurements and peri-operative CAS measurements used to orient the femoral component. Data obtained from CT cannot be used peri-operatively with CAS to improve rotational setting of the femoral component.

Level of evidence

Therapeutic study, Level II.
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Metadata
Title
CT measurements prior to computer-assisted total knee arthroplasty do not improve rotational placement of the femoral component
Author
A. de Ladoucette
Publication date
01-12-2012
Publisher
Springer-Verlag
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 12/2012
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-012-1909-6

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