發(fā)布時間：2018-03-23 23:13

  本文選題：安氏II類1分類　切入點：軟組織側(cè)貌　出處：《福建醫(yī)科大學(xué)》2014年碩士論文

【摘要】：研究目的： 通過SN重疊與上下頜重疊治療前后牙體組織位置變化的比較來探討成年安氏II類1分類患者正畸治療后頜骨位置的變化以及其位置變化對軟組織側(cè)貌的影響。并進一步探討國人軟硬組織變化的相關(guān)性，為臨床矯治計劃的制定和矯治效果的預(yù)測提供參考依據(jù)。 材料方法： 1.將選取的90例成年安氏II類1分類患者治療前后的X線頭顱側(cè)位片分別進行前顱底S-N重疊，上頜重疊和下頜重疊，通過比較不同重疊情況下的牙體組織位置變化來探討頜骨的位置變化； 2.獲取患者治療前后X線頭顱側(cè)位片，，經(jīng)描繪、測量以及統(tǒng)計學(xué)分析，綜合實驗一的結(jié)果，探討顱底重疊和下頜骨重疊時牙體組織位置改變與軟組織改變的相關(guān)性差異比較以及下頜骨的旋轉(zhuǎn)對軟組織側(cè)貌的影響。 結(jié)果： 1. SN重疊與上頜重疊時上切牙在矢狀和垂直方向上的位置變化比較沒有統(tǒng)計學(xué)差異。SN重疊與下頜重疊時下切牙在矢狀方向上位置變化比較沒有統(tǒng)計學(xué)差異但在垂直方向上的位置變化比較有統(tǒng)計學(xué)意義。上頜骨參照線在治療后的改變沒有統(tǒng)計學(xué)差異而下頜骨參照線在治療后的改變有統(tǒng)計學(xué)差異。 2.下頜重疊時下切牙在垂直方向上的位置變化與軟組織側(cè)貌改變沒有相關(guān)關(guān)系，而顱底重疊時下切牙在垂直方向上的改變與上唇內(nèi)收成負相關(guān)關(guān)系。下頜的旋轉(zhuǎn)參與影響Z角的變化。 結(jié)論： 1.上頜骨在矯治后沒有發(fā)生旋轉(zhuǎn)改變。而下頜骨發(fā)生了順時針旋轉(zhuǎn)的改變，順時針旋轉(zhuǎn)0.47°。 2.下頜重疊與SN重疊時下切牙位置改變與軟組織側(cè)貌改變的相關(guān)性比較是存在差異的。下頜的旋轉(zhuǎn)角度會直接對軟組織側(cè)貌產(chǎn)生影響，同時下頜的旋轉(zhuǎn)還可能通過改變下切牙在水平和垂直方向上的位置來間接影響軟組織側(cè)貌。
[Abstract]:Objectives of the study:. By comparing the changes of tooth tissue position between SN overlap and upper mandibular overlap before and after orthodontic treatment, the changes of jaw position in adult patients with Class II class 1 orthodontic treatment and their effects on soft tissue profile were studied. And further explore the correlation between the changes of Chinese soft and hard tissue, To provide a reference for the establishment of clinical treatment plan and the prediction of therapeutic effect. Material methods:. 1. S-N overlap, maxillary overlap and mandibular overlap of anterior skull base, maxillary overlap and mandibular overlap were performed in 90 adult patients with classification II 1 before and after treatment. By comparing the position changes of tooth tissue in different overlaps, the changes of jaw position were discussed. 2. Obtain the X-ray lateral radiographs of patients before and after treatment, and synthesize the results of experiment one by description, measurement and statistical analysis. To explore the difference between the position change of tooth tissue and the change of soft tissue in the overlap of skull base and mandible, and the effect of mandibular rotation on soft tissue profile. Results:. 1. There was no significant difference in sagittal and vertical position of incisors between SN overlap and maxillary overlap. There was no statistical difference between SN overlap and mandibular overlap in sagittal direction, but there was no significant difference in sagittal position between upper incisors and mandibular overlaps. There was no statistical difference in the changes of maxillary reference line after treatment, but there was statistical difference in mandibular reference line after treatment. 2. There was no correlation between the position change of incisors in vertical direction and the change of soft tissue profile. The vertical change of incisor is negatively related to the upper lip harvest, and the rotation of mandible is involved in the change of Z angle. Conclusion:. 1. The maxillary bone did not change in rotation after orthodontic treatment, but the mandible rotated clockwise, with a clockwise rotation of 0.47 擄. 2. The correlation between the position change of incisor and the lateral appearance of soft tissue is different when the mandibular overlap and SN overlap, and the rotation angle of the mandible has direct influence on the soft tissue profile. At the same time, mandibular rotation may indirectly affect soft tissue profile by changing the position of lower incisors in horizontal and vertical directions.
【學(xué)位授予單位】：福建醫(yī)科大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：R783.5


本文編號：1655633