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Three dimensionalCT analysis of femoral tunnel position after ACL reconstruction. A prospective study of one hundred and thirty five cases

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Abstract

Background

One of the principal causes for failure of anterior cruciate ligament reconstruction (ACL) is femoral tunnel mal-position. Several studies compare the position of femoral tunnels achieved with various techniques, with small series and using a quadrant assessment method.

Questions

(1) What is the incidence of anatomical positioning of the intra-articular femoral tunnel aperture in primary ACL reconstruction in a university knee surgery? (2) What are the main errors in positioning?

Methods

3D-CT scans were performed after primary ACL reconstruction in 135 consecutive cases. The intra-articular position of the femoral tunnel aperture was analyzed using the Magnussen classification.

Results

The intra-articular tunnel position was deemed anatomical in 77%, intermediate in 20.8%, and non-anatomical in 2.2%. Among the mal-positioned tunnels, 54.8% were vertical, 29% were anteriorly positioned, and 16.1% were both.

Conclusions

The intra articular femoral tunnel aperture was well positioned using an outside-in technique. The main error of tunnel positioning was a tunnel too vertical.

Level of Evidence: Level III, prospective study (case series).

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Authors and Affiliations

Authors

Corresponding author

Correspondence to Cécile Batailler.

Ethics declarations

The ethical committee has approved this study (CAL n° 2016-037). Our medical practice has not been modified for this study. CT scans are performed routinely for all patients with ACL reconstruction since 2012. No additional examinations have been performed. This study has been performed in accordance with the ethical standards in the 1964 Declaration of Helsinki.

Conflict of interest statement

O.R., C.B., T.L. and E.S. declare that they have no conflict of interest.

S.L.: consultant for Smith & Nephew, institutional research support to Tornier-Wright and Amplitude.

P.N.: consultant for Smith & Nephew, institutional research and teaching support from Tornier-Wright and Amplitude, royalties from Tornier-Wright.

Additional information

Investigation performed at Albert Trillat Center, Lyon North University Hospital, Lyon, France.

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Reynaud, O., Batailler, C., Lording, T. et al. Three dimensionalCT analysis of femoral tunnel position after ACL reconstruction. A prospective study of one hundred and thirty five cases. International Orthopaedics (SICOT) 41, 2313–2319 (2017). https://doi.org/10.1007/s00264-017-3596-x

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  • DOI: https://doi.org/10.1007/s00264-017-3596-x

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