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Erschienen in:
26.04.2017 | Knee
Early patellar dislocation can lead to tibial tubercle lateralization in rabbits
Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy | Ausgabe 9/2018
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Purpose
To investigate the effects of early patellar dislocation on the tibial tubercle location.
Methods
Sixty knees from 30 healthy 1-month-old New Zealand white rabbits were randomly divided into two groups of 30 knees each. Group A (control group) comprised the left knees, which underwent no surgical procedures. Group B comprised the right knees, which underwent patellar dislocation surgery. Computed tomography (flexion 0°) was performed preoperatively and 6 months post-operatively. Measurements included the tibial tuberosity–trochlear groove distance (TT–TG) and tibial tubercle lateralization.
Results
No significant difference in the TT–TG or tibial tubercle lateralization was found between the two groups preoperatively. Six months post-operatively, however, the mean TT–TG in Group A (no patellar dislocation) and Group B (patellar dislocation) was 1.0 ± 0.4 and 3.0 ± 0.7 mm, respectively (p < 0.05). The mean tibial tubercle lateralization also showed a significant difference between Groups A and B at 6 months post-operatively (0.5 ± 0.1 and 0.6 ± 0.0, respectively; p < 0.05).
Conclusions
Early patellar dislocation can lead to tibial tubercle lateralization and an increased TT–TG. Clinically, early intervention for adolescent patients with patellar dislocation will be important.
Level of evidence
Prospective comparative study, Level II.