Imaging analysis of the correlation between tibial tuberosity-trochlea groove distance and femoral trochlea morphology

doi:10.12307/2021.202

Abstract

Abstract: BACKGROUND: Femoral trochlear dysplasia is the most important risk factor for patellofemoral instability. There is no consistent conclusion as to whether the morphology of femoral trochlear is determined by congenital genes or related to the stimulation of the patellofemoral compression. The tibial tuberosity-trochlea groove distance can affect the pressure of the patellofemoral joint, so the relationship between the tibial tuberosity-trochlea groove distance and femoral trochlear morphology was analyzed to verify whether the trochlear morphology is related to the stress stimulation of patella.
OBJECTIVE: To investigate the relationship between tibial tuberosity-trochlea groove distance and trochlea morphology.
METHODS: A total of 154 CT scans from June to August 2019 in Second Affiliated Hospital of Luohe Medical College were analyzed retrospectively. There were 80 males and 74 females, aged 18-55 years. Based on Dejour trochlea classification, the subjects were divided into two groups: trochlea dysplasia group (types A-D) and normal group (sulcus angle ≤ 145°). Researchers measured tibial tuberosity-trochlea groove distance and radiologic parameters characterizing the form of trochlea, including sulcus angle, the lateral trochlea slope, trochlea height (medial, central, lateral), trochlea depth, and trochlea facet asymmetry. The Man-whitney U test was used to evaluate differences in tibial tuberosity-trochlea groove distance between trochlea group and normal group. Pearson correlation analysis was performed between tibial tuberosity-trochlea groove distance and parameters of trochlea morphology.
RESULTS AND CONCLUSION: Trochlea dysplasia group showed higher values for tibial tuberosity-trochlea groove distance than normal group (P < 0.001). Tibial tuberosity-trochlea groove distance significantly correlated with most trochlea parameters evaluated, including sulcus angle (r=0.487, P < 0.001), the lateral trochlea slope (r=-0.286, P < 0.001), medial trochlea height (r=-0.174, P=0.031), trochlea depth (r=-0.299, P < 0.001), trochlea facet asymmetry (r=-0.301, P < 0.001), and Dejour trochlea type (r=0.496, P < 0.001). No correlation was found in lateral trochlea height (r=0.001, P=0.993) and central trochlea height (r=0.102, P=0.210). These findings showed that tibial tuberosity-trochlea groove distance is significantly related to the trochlear dysplasia. This result supports the hypothesis that the stimulation of the patellofemoral compression can affect the development of trochlea, and provides a theoretical basis for the clinical treatment of children with patellofemoral instability.

Key words: patellofemoral instability, tibial tuberosity-trochlea groove distance, trochlea dysplasia, CT, Dejour classification, sulcus angle, correlation analysis

CLC Number:

Zhou Yuanbo, Huang Wenliang, Wang Jindong. Imaging analysis of the correlation between tibial tuberosity-trochlea groove distance and femoral trochlea morphology[J]. Chinese Journal of Tissue Engineering Research, 2021, 25(27): 4390-4394.

Figures/Tables 3

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