Postoperativesagittal Pelvic And Spine Rofile In Adolescent Idiopathic Scoliosis Of Lenke5Types:the Compare Of Anterior And Posterior Approach

Objective:To evaluate the influence on relationship between the sagittal and spine curve in adolescent idiopathic scoliosis of lenke5type by anterior and posterior approach.Material and methods:43patients with adolescent idiopathic scoliosis of lenke5type who underwent surgical correction from July2008to July2012in our hospital were selected for this retrospective study. All of them were classified by different approaches:anterior (group A) or posterior (group B). Main cobb angle, lumbar lordosis (LL), thoracic kyphosis (TK), pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS) and other parameters were analyzed by t-test individually. And Pearson coefficients were used to investigate the relationship between all parameters taken preoperatively and postoperatively intergroup and between two groups.Results:The mean main cobb angles of group A and B preoperative were42.56±13.11°,45.33±12.94°, and that postoperative were10.15±6.75°,11.59±5.45°, which were significant (p<0.01). There were no significant differences between the two groups preoperative and postoperative in the TK, LL, PI, PT, SS. LL was correlated with PI and SS (r=0.517,0.644) preoperative, and remained until postoperative (r=0.419,0637) in group A. In group B, the relationship between LL and PI, SS also remained, r=0.642,0.624preoperative to r=0.635,0.537postoperative. PI was strong related to SS both preoperative and postoperative in both groups.Conclusion:For adolescent idiopathic scoliosis of lenke5type, the anterior and posterior approach can achieve similar outcomes. And both can remain the relationship between LL and PI preoperative and postoperative. As the real pelvic morphological parameter which will not change with sagittal curve, PI should be considered before surgery.