Acta Anatomica Sinica

Acta Anatomica Sinica ›› 2023, Vol. 54 ›› Issue (6): 703-709.doi: 10.16098/j.issn.0529-1356.2023.06.012

• Anatomy • Previous Articles     Next Articles

Association between posterior tibial slope and tibial torsion angle and recurrent patellar dislocation based on the full-length CT of the lower limbs

YUAN Shuo1,2  ZHAO An-quan1,2  HUANG Qi-ri-mai-la-tu1,2  WU Hai-he1  XU Yong-sheng1  QI Yan-song1*  BAO Hu-ri-cha1*   

  1. 1.Department of Orthopedics, Inner Mongolia People，s Hospital, Hohhot 010017, China;  2.Graduate School, Baotou Medical College of Inner Mongolia University of Science and Technology, Inner Mongolia Baotou 014010, China

  • Received:2022-07-13 Revised:2022-10-09 Online:2023-12-06 Published:2023-12-06
  • Contact: Hu-ri-cha BAO E-mail:chaganfu@126.com

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Abstract:

Objective To measure and compare the lateral posterior tibial slope (LPTS), medial posterior tibial slope (MPTS) and tibial torsion angle (TTA) between the patients of recurrent patellar dislocation and the heathy people, and to analyze the correlation between LPTS, MPTS and TTA and the risk factors of recurrent patellar dislocation.   Methods  A total of 33 patients (44 knees) with recurrent patellar dislocation in our hospital from July 2019 to June 2021 were selected and listed as the study group. Twenty-three subjects (46 knees) who were suspected iliac vascular and lower limb vascular diseases during the same period were selected and listed as the control group. All the enrolled researchers had full-length CT scans date of the lower limbs. Three-dimensional models were reconstructed using Mimics 21.0 software and then imported into 3-matic software. The LPTS, MPTS and TTA were measured and compared between the two groups.      Results In the study group, the LPTS, MPTS and TTA were （7.69±1.42）°,（10.06±1.71）°,（36.42±8.13）°, respectively, while the control group, the LPTS, MPTS and TTA were（8.42±1.65）°, （10.44±0.86）°, (25.77±3.90)°, respectively. There were no significant differences in the LPTS, MPTS and TTA between different genders and sides both in the study group and the control group (P>0.05). Compared with the control group, the LPTS in the study group was smaller, and the difference was statistically significant (P<0.05). There was no statistically significant difference between the study group and the control group in the MPTS (P>0.05). Compared with the control group, the TTA in the study group was higher, and the difference was statistically significant (P<0.05). Compared with the control group, the LPTS and MPTS in the study group were significant asymmetry, and the difference was statistically significant (P<0.05).  Conclusion The lateral posterior tibial slope of patients with recurrent patellar dislocation is significantly smaller than that in the healthy people, while there is no significant difference in the medial posterior tibial slope; The tibial torsion angle of patients with recurrent patellar dislocation is significantly larger than in the healthy people; The lateral posterior tibial slope and tibial torsion angle have certain correlation with recurrent patellar dislocation, which can conduct the diagnosis of recurrent patellar dislocation.

Key words: Recurrent patellar dislocation, Anatomy, Risk factor, Three-dimensional measurement, Adult

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