Abstract
OBJECTIVE: This study aimed to evaluate the differences in patellar height and tibial tubercle- trochlear groove distance (TT-TGd) between patients with an intact anterior cruciate ligament (ACL) and ruptured ACL.MATERIAL AND METHODS: A total of 2019 patients (1015 with ruptured ACL and 1004 with an intact ACL) aged between 18-40 years were included. The Insall Salvati index (ISI) was used to determine the patellar height measurement. The TT-TGd was measured based on axial magnetic resonance images. Two orthopedic surgeons independently studied 50 patients’ images for two weeks to assess intra-observer and inter-observer reliability. The mean patellar height and TT-TGd measurements were compared between patients with ruptured ACL and those with an intact ACL.RESULTS: Interobserver and intraobserver agreement were excellent for both measurements (p = 0.001 and k> 0.850 for all measurements). Patellar height and TT-TGd were significantly higher in ACL ruptured patients than in the control group (1.09± 0.37 vs. 1.06± 0.56, p<0.001, 10.0± 3.3 vs. 8.5± 3.0, p<0.001, respectively). The ISI was significantly higher in women than in men (1.13 vs. 1.07, p<0.001). There was no significant difference between the sexes regarding the TT-TGd (9.5 vs. 9.3, p=0.792).CONCLUSIONS: Although significantly increased in patellar height and TT–TGd was detected in patients with ruptured ACL, these differences are not clinically important because they are in the normal range.
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