Abstract
Purpose
Previous research has demonstrated that women have a higher risk of anterior cruciate ligament (ACL) injury than men. Tibiofemoral articular geometry may play a role in the occurrence of ACL tears. The purpose of this study was to analyze the gender-specific geometric characteristics differences in tibiofemoral morphology in ACL-deficient patients.
Methods
Medial tibial slope (MTS), lateral tibial slope (LTS), medial tibial plateau concavity, medial and lateral femoral condyle convexity, and lateral plateau convexity were analyzed in 276 patients with complete ACL injuries (138 females and 138 males). Two blinded observers measured the anatomical parameters of tibiofemoral geometry with use of multiplanar CT scans. Intra- and inter-rater reliabilities were assessed and comparisons between anatomic measures were made between male and female patients.
Results
The average ICC for all measurements was 0.90 (range 0.83–0.97) indicating good reliability. Male ACL injured patients demonstrated significantly greater LTS (10.5° ± 2.8) than female patients (9.6° ± 3.5°; p < 0.05). No gender difference in MTS was found (n.s.). Medial and lateral femoral condyle convexity and medial tibial plateau concavity were greater in males than females (all p < 0.05). Lateral tibial plateau convexity in females was higher than in males (p < 0.001). The medial and lateral compartments were found to be more incongruent in females than males (p < 0.01 and p < 0.001, respectively).
Conclusions
Female patients were noted to have more incongruent medial and lateral compartments than male patients. These gender-specific differences in joint morphology may contribute to graft tear risk and outcomes of ACL reconstruction; however, comparative clinical studies are needed to confirm this possibility.
Level of evidence
3.
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Abbreviations
- ACL:
-
Anterior cruciate ligament
- MTS:
-
Medial tibial slope
- LTS:
-
Lateral tibial slope
- CT:
-
Computerized tomography
- ICC:
-
Intra-class correlation
- MRI:
-
Magnetic resonance imaging
- IKDC:
-
International knee documentation committee
- PACS:
-
Picture archiving and communications system
- FOV:
-
Field of view
- DICOM:
-
Digital imaging and communications in medicine
- MPR:
-
Multi-planar reconstruction
- PTAA:
-
Proximal tibial anatomic axis
- MPL:
-
Medial tibial plateau length
- LPL:
-
Lateral tibial plateau length
- MCL:
-
Medial femoral condyle length
- LCL:
-
Lateral femoral condyle length
- MCR:
-
Medial compartment ratio
- LCR:
-
Lateral compartment ratio
- MCH:
-
Medial femoral condyle height
- LCH:
-
Lateral femoral condyle height
- MPH:
-
Medial tibial plateau height
- LPH:
-
Lateral tibial plateau height
- MCC:
-
Medial condyle convexity
- LCC:
-
Lateral condyle convexity
- MPC:
-
Medial plateau concavity
- LPC:
-
Lateral plateau convexity
- MC:
-
Medial femorotibial congruency
- LC:
-
Lateral femorotibial congruency
- SD:
-
Standard deviation
- mm:
-
Millimeters
- CI:
-
Confidence interval
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AS participated in the design of the study, acquisition and interpretation of the data. SS helped to evaluate the inter-observer reliability. RM helped to translate the manuscript in English and revising it critically for important intellectual content. SL have given final approval of the version to be published. PN have given final approval of the version to be published. ES have made substantial contribution to conception, design of the study and have given final approval of the version to be published.
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No external source of funding was used.
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AS, SS, RM, SL, PN and ES: no competing interests.
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This study was approved by our institutional review board.
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Patients gave informed consent that data would be published.
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Schneider, A., Si-Mohamed, S., Magnussen, R.A. et al. Tibiofemoral joint congruence is lower in females with ACL injuries than males with ACL injuries. Knee Surg Sports Traumatol Arthrosc 26, 1375–1383 (2018). https://doi.org/10.1007/s00167-017-4756-7
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DOI: https://doi.org/10.1007/s00167-017-4756-7