In The Aging Process Of The Maxilla Morphological Analysis And Clinical Significance

Objective: The aging process and morphological change of the female population innorthern China is analyzed by multi-slice spiral CT three-dimensional reconstruction.The aim of this study is to make a guidance for clinical rejuvenation operation andinjection treatment and to provide basis for clinic to diagnose maxillary aging.Methods: We collected the maxillary CT scan data of Xinhua Hospital, which isaffiliated to Dalian University. The maxillary measurements of150women fromnorthern China are randomly selected, and the age range:20-79and divided into threegroups:20-39years old is the youth group,40to59years old is the mid-aged group,and60to79years old is the older group. Consulting the maxillary measuring pointsand measurement methods from decorative surgery and foreign literature, thethree-dimensional model of superior maxilla is reconstructed assisted by computer.The relevant data from frontal and lateral images are obtained, then, with the aid ofcorrelative software, measure the points, lines, angles, which could reflect the agingof the maxilla, and each data should be measured three times, calculate the average,and at last do statistic analysis with SPSS17.0.1.Result： The distances from Ear point to Superior NasoMaxillary suture havesignificant difference between the youth group and the middle-aged group, as well asbetween the youth group and the older group, and P <0.05, but there are no statisticaldifference between the middle-aged group and the older group, and P>0.05. Thedistances from Ear point to the lowest point of suturae nasomaxillaris have significantdifference between the youth group and the middle-aged group, as well as betweenthe youth group and the older group, and P <0.05, but there are no statisticaldifference between the middle-aged group and the older group, and P>0.05. Thedistances from Ear point to the anterior nasal jujube point have significant differencebetween the youth group and the middle-aged group, as well as between the youthgroup and the older group, and P <0.05, but there are no statistical difference betweenthe middle-aged group and the older group, and P>0.05. The distances from SuperiorNasoMaxillary suture to the Anterior Nasal Spine have significant difference betweenthe youth group and the middle-aged group, as well as between the youth group andthe older group, and P <0.05, but there are no statistical difference between themiddle-aged group and the older group, and P>0.05.Maxillary angles between theyouth group and the middle-aged group have significant difference, and P <0.05, butthere are no significant difference between the youth group,and the same betweenthe middle age group and the older age group, and P>0.05. The areas of piriformaperture have significant difference between the youth group and the middle-aged group, as well as between the youth group and the older group, and P <0.05, but thereare no statistical difference between the middle-aged group and the older group, andP>0.05.Conclusion: With the increasing of age, the aging characteristics of the maxilla arealtering gradually among female population in northern China. When it is at theperiod of middle age, the maxilla starts to remodel, and when it arrives the older agestage, the morphology of maxilla changes little. There are differences compared withforeign research data, the aging of maxilla is not clockwise. But the overall shrinking.