平均生長(zhǎng)型青少年不同矢狀骨面型切牙與磨牙傾斜度研究
發(fā)布時(shí)間:2019-03-07 23:23
【摘要】:目的:通過(guò)對(duì)平均生長(zhǎng)型青少年三種矢狀骨面型治療前頭顱定位側(cè)位片進(jìn)行測(cè)量,比較三種不同矢狀骨面型切牙唇舌向和第一恒磨牙近遠(yuǎn)中傾斜度代償特點(diǎn)及差異,為臨床矯治設(shè)計(jì)、支抗預(yù)備及正畸術(shù)后長(zhǎng)期穩(wěn)定提供參考依據(jù)。方法:依據(jù)納入標(biāo)準(zhǔn)與面部生長(zhǎng)型分型標(biāo)準(zhǔn)從正畸患者中選取平均生長(zhǎng)型青少年120例,按ANB角行矢狀向分型:Ⅰ類(lèi)骨面型(ANB角0°-5°),Ⅱ類(lèi)骨面型(ANB角≥5°),Ⅲ類(lèi)骨面型(ANB角≤0°)三組每組各40例,使用13個(gè)角度作為切牙及第一恒磨牙傾斜度的測(cè)量指標(biāo),三組進(jìn)行單因素方差分析及兩兩比較用LSD-t檢驗(yàn)。結(jié)果:1.不同矢狀骨面型切牙傾斜度測(cè)量結(jié)果:三組不同的矢狀骨面型中,∠U1-SN、∠U1-FH、∠U1-PP的測(cè)量值差異均無(wú)統(tǒng)計(jì)學(xué)意義;∠L1-MP的測(cè)量值三組間的差異有統(tǒng)計(jì)學(xué)意義,骨性Ⅲ類(lèi)∠L1-MP的數(shù)值小于Ⅰ類(lèi)、Ⅱ類(lèi),骨性Ⅰ類(lèi)、Ⅱ類(lèi)之間無(wú)區(qū)別;∠U1-L1的測(cè)量值三組間差異有統(tǒng)計(jì)學(xué)意義,骨性Ⅲ類(lèi)∠U1-L1的數(shù)值大于Ⅰ類(lèi)、Ⅱ類(lèi),骨性Ⅰ類(lèi)、Ⅱ類(lèi)之間無(wú)區(qū)別。2.不同矢狀骨面型第一恒磨牙傾斜度測(cè)量結(jié)果:∠U6-SN、∠U6-FH、∠U6-PP、∠L6-SN均是骨性Ⅲ類(lèi)組大于骨性Ⅰ類(lèi)、Ⅱ類(lèi)組,∠L6-MP骨性Ⅲ類(lèi)組小于Ⅰ類(lèi)、Ⅱ類(lèi)組,差異均有統(tǒng)計(jì)學(xué)意義;∠U6-L6的測(cè)量值三組間差異無(wú)統(tǒng)計(jì)學(xué)意義。下頜切牙與磨牙傾斜度的測(cè)量值均是骨性Ⅲ類(lèi)組的小于Ⅰ類(lèi)、Ⅱ類(lèi),提示骨性Ⅲ類(lèi)下切牙、下頜第一恒磨牙代償性?xún)A斜一致;骨性Ⅲ類(lèi)下切牙較Ⅰ類(lèi)代償變化角度為9.24°,下頜第一恒磨牙較Ⅰ類(lèi)代償變化角度為4.11°,提示骨性Ⅲ類(lèi)下切牙的代償性比下磨牙的明顯。結(jié)論:1.隨著ANB角的減小,平均生長(zhǎng)型青少年下頜切牙舌向傾斜,上頜第一恒磨牙近中傾斜,下頜第一恒磨牙遠(yuǎn)中傾斜,上頜切牙唇舌向傾斜度在三種骨面型中無(wú)差別。2.平均生長(zhǎng)型青少年骨性Ⅲ類(lèi)上頜第一恒磨牙近中傾斜代償,下頜第一恒磨牙遠(yuǎn)中傾斜代償,下切牙舌向傾斜代償;下切牙與磨牙代償傾斜趨勢(shì)一致,下頜切牙代償較磨牙明顯。3.骨性Ⅱ類(lèi)與Ⅰ類(lèi)比較,上切牙趨于舌向傾斜,上頜第一恒磨牙趨于遠(yuǎn)中傾斜,下切牙趨于唇向傾斜,下頜第一恒磨牙趨于近中傾斜。
[Abstract]:Objective: to compare the compensatory characteristics and differences between labial and lingual orientation of incisor teeth of three different sagittal surface types of incisor teeth and near-distal inclination of the first permanent molar by measuring the lateral cephalograms of three sagittal bone-plane types of adolescent before treatment. It provides reference for clinical design, Anchorage preparation and long-term stability after orthodontic surgery. Methods: according to the inclusion criteria and facial growth classification criteria, a total of 120 adolescents with average growth type were selected from orthodontic patients. Sagittal classification was performed according to the ANB angle: type 鈪,
本文編號(hào):2436552
[Abstract]:Objective: to compare the compensatory characteristics and differences between labial and lingual orientation of incisor teeth of three different sagittal surface types of incisor teeth and near-distal inclination of the first permanent molar by measuring the lateral cephalograms of three sagittal bone-plane types of adolescent before treatment. It provides reference for clinical design, Anchorage preparation and long-term stability after orthodontic surgery. Methods: according to the inclusion criteria and facial growth classification criteria, a total of 120 adolescents with average growth type were selected from orthodontic patients. Sagittal classification was performed according to the ANB angle: type 鈪,
本文編號(hào):2436552
本文鏈接:http://www.sikaile.net/yixuelunwen/kouq/2436552.html
最近更新
教材專(zhuān)著