Related Experiment Video
Updated: Apr 4, 2026
Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
Published on: February 17, 2023
3D computer tomography for measurement of femoral position in acl reconstruction
Tiago Lazzaretti Fernandes1, Nuno Miguel Morais Fonseca Martins1, Felipe de Andrade Watai1
1University of São Paulo, Hospital das Clínicas, Institute of Orthopedics and Traumatology, Brazil, Institute of Orthopedics and Traumatology, Hospital das Clínicas, University of São Paulo, Medical School. Brazil.
Objective:
To validate intra- and inter-class correlation coefficients of a transparent 3D-TC protocol and investigate relationships between different axial rotations.
Methods:
Twenty unilateral knee TCs (iSite - Philips) were evaluated by means of a transparent 3D-TC OsiriX Imaging Software (v.3.9.4), 3D MPR protocol. Mathematical model of femoral tunnel projections acquired on vertical and horizontal rotations from -20 to +20 degrees. Height (h'/H) and length (t'/T) of tunnel projections have been analyzed by the Bernard and Hertel's method.
Statistics:
power of study=80%, ICC, ANOVA, p<0.05 (SPSS-19).
Results:
Transparent 3D-TC showed high reliability of both intra-observer (h'/H=0.941; t'/T=0.928, p<0.001) and inter-observer (h'/H=0.921; t'/T=0.890, p<0.001) ICC. ACL Length (t'/T) and Height (h'/H) projections were statistically different on vertical and horizontal rotations: p=0.01 and p<0.001, respectively.
Conclusion:
This new transparent 3D-TC protocol is an accurate and reproducible method that can be applied for ACL femoral tunnel or footprint measurement with high ICC reliability. Level of Evidence II, Descriptive Laboratory Study.
