Age-related Changes In Mandibular Condyle Volume,Surface Area And Morphological Index In School-age Children

Objective: To investigate the use of three-dimensional reconstruction technology to reconstruct bilateral temporomandibular joint condyle models of school-age children,and analyzed and compare the correlation between condyle volume,surface area,and morphological index with age through three-dimensional reconstruction models.Methods:Collected from January 2015 to April 2019 in the the First Affiliated Hospital of Xinjiang Medical University(Affiliated Stomatological Hospital)of the 350 children who met the inclusion criteria among 6-12 years old children.1 year old is divided into 1 group,every50 children are divided into 1 group,including 25 male and female cases,divided into 7groups.The CBCT data of the selected children were exported as DICOM format files and imported into Mimics Medical 19.0 software,and the bilateral temporomandibular joint condyle mask was created by manual segmentation to create a three-dimensional reconstruction model.The volume,surface area and morphological index data of the bilateral condyle model were measured and calculated,and the data obtained were analyzed and studied in terms of age,gender,and left and right sides.Results: Age was positively correlated with condyle volume(r=0.667),surface area(r=0.675)and morphological index(r=0.581),and there were significant differences among different age groups in condyle volume,surface area and morphological index(P<0.05),while there were no significant differences between gender groups or between left and right condyles in condyle volume,surface area and morphological index(P > 0.05).Conclusions: The condyle volume,surface area and morphological index of children aged 6～12 years showed an increasing trend,but there was no significant difference between male and female and between left and right sides.