الفهرس 
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Abstract
Adolescent idiopathic scoliosis (AIS) is the most common type of idiopathic scoliosis and a challenging problem for spinal surgeons. Besides severe physical effects, its impressions on appearance and function of the patient, especially in females, is associated with several psychosocial consequences. Previously surgeons tried to regain the normal spinal alignment only in frontal plane; recently, authors have demonstrated that sagittal alignment is as important as frontal alignment. Sagittal spinal alignment significantly affects the quality of life and outcomes of spinal surgeries. (41)
The aim of this work was to analyze the pelvic parameters radiologically in patients with adolescent idiopathic scoliosis.
The study included 51 patients with AIS. The mean age of all patients in this study was 17.0 ± 5.25 years, the youngest was 10 years and the eldest was 29. Seventeen patients (32.7%) were males and 34 patients (67.3%) were females.
The mean value of PI was 54.10° ± 9.47°. The mean value of PT was 15.83° ± 8.78°. The mean value of SS was 38.27° ± 8.13°. The mean LL was 53.04° ± 15.68°. The mean value of TK was 25.0° ± 12.65°.
There was no significant difference between age and all spino-pelvic parameters.
There was no significant difference between sex and PI, PT, SS or LL but there was statistically significant difference between sex and TK (p<0.014) as female patients have hypokyphotic angle more than male patients.
There was statistically significant difference between LL and SS (p<0.001) but no significant correlation between LL and PI or even PT.
There was statistically significant difference between LL and TK (p<0.012) as any increase in LL is will lead to increase in TK.
There was significant difference between pelvic parameters as when PT increases PI also increases and when SS increases also PI increases but when PT increases SS decreases.