本文選題：三維測(cè)量　切入點(diǎn)：頦部　出處：《南京醫(yī)科大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：目的:利用CBCT(錐體束CT,cone beam computed tomography)三維成像技術(shù),建立頦部形態(tài)的三維測(cè)量方法。使用此方法研究安氏Ⅰ類女性下切牙先天缺失者頦部的三維形態(tài),以期為臨床診療提供參考。方法:隨機(jī)選取一名就診于南京醫(yī)科大學(xué)附屬口腔醫(yī)院正畸科的患者,利用Dolphin軟件對(duì)其在三維重建CT上進(jìn)行線距、角度、比例、面積及體積的測(cè)量,并驗(yàn)證此方法的重復(fù)性。依據(jù)納入標(biāo)準(zhǔn),收集到239名安氏Ⅰ類女性患者的錐體束CT數(shù)據(jù),其中先天性下切牙缺失患者127名,無缺牙患者112名。對(duì)受試對(duì)象的CBCT數(shù)據(jù)進(jìn)行三維重建和測(cè)量。使用統(tǒng)計(jì)學(xué)軟件SPSS 22.0對(duì)測(cè)量值進(jìn)行統(tǒng)計(jì)學(xué)分析,以探尋安氏Ⅰ類女性的下切牙先天缺失與頦部三維形態(tài)的關(guān)系。結(jié)果:1.下切牙先天缺失對(duì)各年齡段安氏Ⅰ類均角女性頦部三維形態(tài)有影響。其下尖牙寬度減小。12歲時(shí),頦部相對(duì)于全面部及下切牙的突度增加;18歲時(shí),下頜對(duì)角線長度減小,下頜整體發(fā)育不足。12-26歲時(shí),下唇突度減小,軟組織頦點(diǎn)及頦唇溝點(diǎn)至下唇突點(diǎn)的水平距離減小,美學(xué)評(píng)價(jià)提高;26歲時(shí),下唇厚度增加。12歲者的下頜牙槽突在二維的矢狀層面發(fā)育不足;18歲時(shí),下頜牙槽突在三維層面發(fā)育不足。2.下切牙先天缺失對(duì)各垂直骨面型安氏Ⅰ類青少年女性頦部三維形態(tài)有影響。其下尖牙寬度減小;均角時(shí),頦部相對(duì)于全面部的突度增加,低角時(shí),下頜對(duì)角線長度減小,低角和均角時(shí),頦部相對(duì)于全面部及下切牙的突度均增加。低角時(shí),下唇厚度增加;均角時(shí),下唇突度減小,軟組織頦點(diǎn)及頦唇溝點(diǎn)至下唇突點(diǎn)的水平距離減小,美學(xué)評(píng)價(jià)提高。不同垂直骨面型的牙槽骨及基骨發(fā)育與牙列完整者沒有統(tǒng)計(jì)學(xué)差異。結(jié)論:安氏Ⅰ類女性下切牙先天缺失者的頦部形態(tài)與安氏Ⅰ類女性牙列完整者不同。臨床診斷和治療下切牙先天缺失患者時(shí)應(yīng)注意到這種差異。
[Abstract]:Objective: to establish a three dimensional measurement method of mental shape by using the three-dimensional imaging technique of cone beam computed tomography.The method was used to study the three dimensional shape of chin in female patients with congenital loss of lower incisor. Methods: a patient in orthodontic department of the affiliated Stomatology Hospital of Nanjing Medical University was selected randomly and measured on 3D reconstruction CT with Dolphin software, such as line distance, angle, proportion, area and volume. The repeatability of this method was verified. According to the inclusion criteria, the CT data of the pyramidal tracts were collected from 239 female patients of Class I, including 127 patients with congenital lower incisor defect. The CBCT data of the subjects were reconstructed and measured by using the statistical software SPSS 22.0. In order to explore the relationship between congenital loss of lower incisor and three dimensional shape of chin in female of Class I. results: 1. Congenital loss of lower incisor had an effect on the three-dimensional shape of chin of female of all ages. The width of lower incisor was decreased at the age of 12 years. At the age of 18 years, the length of the diagonal line of the mandible decreases, the degree of the lower lip process decreases at the age of 12 to 26 years, and the horizontal distance between the mental point of the soft tissue and the point of the sulcus of the mental lip to the point of the lower labial process decreases when the protuberance of the mental region is higher than that of the whole face and the incisor of the lower incisor. Aesthetic evaluation at the age of 26, the thickness of the lower lip increased. At the age of 18, the mandibular alveolar process was underdeveloped on the sagittal plane. The mandibular alveolar process is underdeveloped on the three-dimensional level. The congenital loss of the lower incisor has an effect on the three dimensional shape of the mental region of the female female of class I of the vertical bone type, and the width of the lower canine decreases, and the protruding degree of the chin relative to the whole face increases when the angle is equalized. At low angle, the length of diagonal line of mandible decreased, the protruding degree of chin relative to the whole face and lower incisor increased at low angle, the thickness of lower lip increased at low angle, and the protruding degree of lower lip decreased at equal angle. The horizontal distance between the mental point and the sulcus point of the soft tissue and the point of the lower labial process was decreased. Aesthetic evaluation was improved. There was no statistical difference between alveolar bone and basal bone of different vertical bone types and complete dentition. Conclusion: the mental shape of congenital missing lower incisor of female lower incisor of class I is the same as that of female dentition of class I. This difference should be noted in the clinical diagnosis and treatment of congenital inferior incisor defect.
【學(xué)位授予單位】：南京醫(yī)科大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：R783.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 喬艦;;組內(nèi)相關(guān)系數(shù)的理論基礎(chǔ)及建模應(yīng)用[J];統(tǒng)計(jì)與信息論壇;2016年11期

2 鞠昊;朱紅華;段濤;李志民;孫宏晨;Farman AG;Scarfe WC;;CBCT的基本原理及在口腔各科的應(yīng)用進(jìn)展[J];醫(yī)學(xué)影像學(xué)雜志;2015年05期

3 王s，

本文編號(hào)：1640303