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Chinese Journal of Joint Surgery(Electronic Edition) ›› 2024, Vol. 18 ›› Issue (01): 78-85. doi: 10.3877/cma.j.issn.1674-134X.2024.01.011

• Basic Research • Previous Articles    

Three-dimensional measurement and morphological analysis of delto-fulcral triangle of scapula

Peizhi Yuwen1, Xinqun Cheng1, Xiang Lei1, Xiaojuan Zhang1, Yanbin Zhu1, Hongzhi Lyu1, Wei Chen1, Yingze Zhang1,()   

  1. 1. Hebei Institute of Orthopedics, The Third Hospital of Hebei Medical University, Shijiazhuang 050051, China
  • Received:2023-11-06 Online:2024-02-01 Published:2024-03-13
  • Contact: Yingze Zhang

Abstract:

Objective

To measure and analyze the morphology of delto-fulcral triangle (DFT) of scapula in three dimensions using Mimics software.

Methods

Ninety-two healthy adult volunteers who underwent CT thin-section scanning of the scapula at the Third Hospital of Hebei Medical University in March 2021 were included, No history of trauma or surgery to the scapula or shoulder, no arthritis of the shoulder, rheumatism, rheumatoid disease, etc. Data were reconstructed into three dimensions using Mimics software, the delto-fulcral triangle was determined based on three points including the anterosuperior point of the coracoid process, the most lateral and the most posterior points of the scaphoid, edges and angles of deltofu-lcral triangle, distances between the three points to the glenoid and to the scapular plane, angles of the three point-glenoid-subscapula (angles between anterosuperior point of the coracoid process-glenoid-subscapular angle, vertex of posterolateral angle of acromion, and posterior edge of posterolateral angle of acromion-glenoid-subscapular angle)were measured. Patients were divided into three groups with a interval age of 20 years; differences in each index were compared between the genders and ages using chi square test and t test, as well as correlation analysis.

Results

The DFT showed an unequal triangular pattern in all the volunteers, with largest length of anterior fulcrum and posterior fulcrum landmarks (AFPF) and corresponding to the largest angle A. There was no statistically significant difference in the parameters of the scapula in different age subgroups(all P>0.05). In male volunteers, the rostral-glenoid centre (F=0.377, P<0.05), the rostral-scapular plane (t=110.122, P<0.05), the vertex of the anterior-lateral angle of the acromion-glenoid centre (t=36.9882, P<0.05), and the vertex of the anterior-lateral angle of the acromion-glenoid centre (t= 117.164, P<0.05), posterior edge of posterior lateral angle of acromion - glenoid centre (t=68.705, P<0.05), acromion-scapular plane (t=63.741, P<0.05), distance between anterior fulcrum and lateral acromion landmarks (AFLAC) (t=63.185, P<0.05), and lateral acromion and posterior fulcrum landmarks (LACPF) (t=44.804, P<0.05), AFPF (t=125.943, P<0.05), and the area under the acromion (t=84.761, P<0.05) were higher than those of the females, and the difference was statistically significant. There was a highly positive correlation between the anterolateral acromion apex-glenoid heart-subacromial angle and the posterior edge of the posterior lateral acromion-glenoid heart-subacromial angle (r=0.537, P<0.05), a highly positive correlation between the AFPF and both the LACPF and AFPF (r=0.584, 0.636, both P<0.05), and a highly negative correlation between angle A and angle B and C (r=-0.765, -0.585, both P<0.05) .

Conclusions

DFT triangle differs between males and females in terms of length indicators. AFPF is the main indicator of the size of the supraspinatus outlet, and this triangle can be used as a reference in the case of conditions such as subacromial impingement syndrom

Key words: Scapula, Weights and measures, Imageing, three-dimensional

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