True acetabulum morphology of Crowe type IV developmental dysplasia of the hip based on three-dimensional surgical simulation

doi:10.3969/j.issn.2095-4344.2903

Abstract

Abstract:

BACKGROUND: Patients with Crowe type IV developmental dysplasia of the hip have a greater degree of hip anatomy deformity. Three-dimensional images have unique advantages in reflecting the morphological characteristics of the true acetabulum and evaluating acetabular parameters. Therefore, it is necessary to qualitatively and quantitatively evaluate three-dimensional morphological analysis of the true acetabularity of Crowe type IV developmental dysplasia of the hip.

OBJECTIVE: To explore the morphological characteristics of true acetabulum in patients with Crowe type IV developmental dysplasia of the hip based on three-dimensional surgical simulation technology.

METHODS: Twenty patients (22 hips) of Crowe type IV developmental dysplasia of the hip and 22 normal controls (22 hips) were included in the study. The original CT data were imported into Mimics software, and a three-dimensional digital visual model of the acetabulum was established. The three-dimensional surgical simulation technology was used to reconstruct the true acetabulum, determine the true acetabular rotation center, and describe the characteristics of the acetabular morphology. Acetabular anteversion angle and acetabular abduction angle were measured in 3-matic software. Qualitative and quantitative three-dimensional morphological analysis was conducted in the true acetabulum of Crowe type IV developmental dysplasia of the hip.

RESULTS AND CONCLUSION: (1) The true morphology of the Crowe type IV dysplasia group was a triangle with a narrow upper and lower width. The ideal center for simulating the cup placement was approximately above the posterior bone wall. (2) Acetabular anteversion angle in the Crowe type IV dysplasia group (35.07±3.09)° was significantly increased compared with the control group (15.89±3.14)°, and the difference was statistically significant (P < 0.05). (3) Acetabular abduction angle in the Crowe type IV dysplasia group (46.87±2.73)° was larger than in the control group (43.88±2.60)°, and the difference was statistically significant (P < 0.05). (4) The morphological characteristics of true acetabulum in developmental dysplasia of the hip patients can be comprehensively assessed by using three-dimensional surgical simulation technology. Developmental dysplasia of the hip patients must carefully carry out individualized preoperative planning before performing total hip arthroplasty.

Key words: hip, joint, dysplasia, three-dimensional reconstruction, Crowe type IV, acetabulum

CLC Number:

Kang Peng, Zhang Fangxin, Maihemuti·Yakufu, Wei Weitao, Yilihamu·Toheti, Aierken·Amudong. True acetabulum morphology of Crowe type IV developmental dysplasia of the hip based on three-dimensional surgical simulation[J]. Chinese Journal of Tissue Engineering Research, 2020, 24(36): 5749-5754.

Figures/Tables 9

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