The investigation of lateral atlantoGdental interval of normal atlantoGaxial joint in children by MSCT and its MPR techniques / 实用放射学杂志

ABSTRACT

Objective To measure the lateral atlanto-dental interval (LADI)of normal atlanto-axial joint in children by MSCT and its MPR techniques,to explore its clinical significance.Methods We performed MPR coronal reconstruction for 207 original images of paranasal sinus scanned in neutral position,measure and compare the bilateral LADI and the variance of bilateral lateral atlanto-dental interval (VBLADI).Results There were 1 25 males and 82 females,the LADI of the former was larger than that of the latter,and there was significant difference between them (P＜0.05),the VBLADI of the former was larger than that of the latter,and there was no significant difference between them (P＞0.05).There were 126 cases younger than 7 years-old,while 81 cases older than or equal to 7 years-old,the bilateral LADI of the former was larger than that of the latter (P＞0.05),while the VBLADI of the former was larger than that of the latter (P＜0.05).Conclusion The asymmetry of bilateral LADI is common in normal children.Subluxation is generally considered suspicious if the VBLADI is larger than or equal to 3 mm,when this occurs,the clinician need to combine the clinical feature and do further examination to make a clarify diagnosis.