Head and Neck Imaging
Clinical Research of the Age-related Change in Chin Cortex by Cone-beam CT*
Author：LIN Hou-xue, GUO Song-song, HE Jia-yi,et al.
affiliation：Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
PDFAbstract
Objective The aim of the study was to evaluate the change of the chin cortex thickness in different ages by cone-bean CT. Methods 180 patients (90 females and 90 males) which aged from 20 to 70 years old were divided into 6 groups. The ROI was chosen in 3 mm outside mandibular symphyseal and 5 mm in front of mental foramen. Three planes (5mm, 7mm, 9mm under root apical) were measured both buccal and lingual side by Mimics software. Results Buccal cortex thickness in group 20-30 years-old and group 35-45 years-old were thicker than group 60-70 years-old for both femals and male(P＜0.05). There was no significant statistical difference in goup 20-30 years-old and 35-45 years-old for the buccal side and in every group for lingual side. Conclusion The buccal chin cortex is negatively correlated with age, and has nothing to do with the distance under root apical. The phenomenon is more apparent in 9mm under root apical.
【Keyword】Mandible; Cone-beam CT; Cortex Thickness
【Chart number】R783.4；R814.42
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672- 5131.2016.09.005
Chinese journal of CT and MRI
th14Volume， th 9 Issue
2016Year09Month
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