Interrelationship between location phase and opening morphologic parameters of acetabulum evaluated with multislice spiral CT

doi:10.3969/j.issn.2095-4344.2013.04.011

Abstract

Abstract:

BACKGROUND: The improper selection of phase and sizes of acetabular cup of total hip arthroplasty can cause fixation failure of the acetabular component.
OBJECTIVE: To analyze the interrelationship between location phase and opening morphologic parameters of acetabular with multislice CT.
METHODS: The normal hip joints of 63 patients (126 hips) were selected in the study, removed the femoral head to observe the morphology of the acetabular anterior and posterior wall on CT reformation VR image,the center of the acetabulum levels of the MPR standard coronal and axial CT image were measured, including acetabular ridge height difference posterior and anterior, anteroposterior diameter, anteversion angle, suprainferior diameter, transverse diameter, the abduction angle, and the difference between left and right side, male and female, as well as the parameters with the same gender and different ages were analyzed. The correlation and regression analysis was used to draw the interrelationship between location phase and opening morphologic parameters of acetabular rim.
RESULTS AND CONCLUSION: Anterior acetabular ridge shapes were divided into curved type (54/126, 44.44%), linear type (30/126, 23.80%), irregular angles type (22/129, 17.46%) and angled type (18/126, 14.28%). There was no significant difference of the location phase and opening morphologic parameters of acetabular rim between different sides and ages (P > 0.05). The suprainferior diameter and anteroposterior diameter of male patients were significantly larger than those in female patients (P < 0.01), but there were no significant differences of abduction angle and anteversion angle between different genders (P > 0.05). The anteversion angle of male and female patients was positive correlated with acetabular ridge height difference posterior and anterior and suprainferior diameter, but the abduction angle was negative correlated with the transverse diameter. The anteversion angle and the acetabular ridge height difference posterior and anterior was highly correlated, significantly lowly correlated with the anteroposterior diameter, and the anteversion angle≈acetabular ridge height difference posterior and anterior numerically; the male anteroposterior diameter was positive correlated with suprainferior diameter and transverse diameter, the female abduction angle was significantly positive correlated with anteroposterior diameter. The remaining parameters were not obvious. There was correlation between acetabular opening morphological parameters and location phase which matched with each other and had guidance effect on the design of acetabular prosthesis and formulation of total hip arthroplasty.

Key words: bone and joint implants, photographs and images of bone and joint, acetabulum, histomorphometry, tomography, X-ray computed, total hip arthroplasty

CLC Number:

R318

Shu Rong-bao, Luo Xiao, He Fang. Interrelationship between location phase and opening morphologic parameters of acetabulum evaluated with multislice spiral CT[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(4): 633-638.

Figures/Tables 6

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