微種植體支抗遠移上頜磨牙的三維有限元研究
發(fā)布時間：2019-03-06 21:51
【摘要】：目的本研究通過建立包含上牙列、牙周膜、牙槽骨、直絲弓矯治器以及頰側(cè)牙根間微種植體支抗的三維有限元研究模型,對三種遠移上頜磨牙的方式進行有限元力學(xué)分析,包括微種植體支抗遠移上頜第二磨牙,微種植體支抗同時遠移上頜第一和第二磨牙,以及微種植體支抗整體遠移上牙列,為正畸臨床遠中移動上頜磨牙提供生物力學(xué)參考。方法利用錐形束CT(cone beam CT,CBCT)掃描獲取上頜骨和上牙列的CT圖像,通過一系列計算機輔助設(shè)計軟件和有限元分析軟件建立包含上牙列、牙周膜、牙槽骨、直絲弓矯治器以及頰側(cè)牙根間微種植支抗的三維有限元研究模型,并模擬三種遠移上頜磨牙的方式:(1)在上頜第一磨牙與第二磨牙之間模擬鎳鈦推簧推力2.5N,將牽引鉤與微種植釘頭部固定連接,以模擬微種植體支抗遠移上頜第二磨牙;(2)在上頜第二前磨牙與第一磨牙之間模擬鎳鈦推簧推力2.5N,將牽引鉤與微種植釘頭部固定連接,以模擬微種植體支抗同時遠移上頜第一和二磨牙;(3)在牽引鉤與微種植釘頭部之間施加相互牽引力2.5N,以模擬微種植體支抗整體遠移上牙列。利用有限元分析軟件計算出所有牙齒在三維方向上的初始位移量以及牙周膜的范式應(yīng)力分布。結(jié)果本研究建立了精確度較高的頰側(cè)牙根間微種植體支抗遠移上頜磨牙的三維有限元研究模型,該支抗系統(tǒng)下的有限元計算結(jié)果顯示,(1)單獨遠移上頜第二磨牙時,第二磨牙存在明顯的矢狀向的遠中傾斜移動、水平向的頰向傾斜和遠中旋轉(zhuǎn)移動,以及垂直向的遠中壓低,前牙支抗控制良好;(2)同時遠移上頜第一和第二磨牙時,第一和第二磨牙均存在明顯的矢狀向的遠中傾斜移動、水平向的頰向傾斜和遠中旋轉(zhuǎn)移動以及垂直向的遠中壓低,但上述移動中傾斜的趨勢以及位移量均較單獨遠移第二磨牙時小,而前牙在矢狀向上的支抗控制稍弱,出現(xiàn)少量的唇傾;(3)整體遠移上牙列時,牙弓兩側(cè)少量外擴。矢狀向上牙列整體發(fā)生遠中移動,遠中位移量從中切牙到第二磨牙遞減。前牙段出現(xiàn)明顯的舌向傾斜移動,后牙出現(xiàn)較少量的遠中傾斜移動,垂直向切牙明顯壓低。(4)三種方式遠移磨牙的牙周膜最大范式應(yīng)力值分別是18kPa、14kPa、4kPa。結(jié)論在本研究所建立的頰側(cè)牙根間微種植體支抗遠移磨牙系統(tǒng)中,(1)不同的遠移磨牙的方式會對上牙列的位移量和牙周膜的應(yīng)力分布產(chǎn)生不同的影響;(2)相同推力的作用下,遠移單顆磨牙比同時遠移兩顆磨牙時的矢狀向初始位移量更高,前牙的支抗控制更好,但其磨牙的傾斜程度更明顯;(3)上牙列的整體遠移可能會引起前牙明顯的舌傾,需要尤其注意前牙的轉(zhuǎn)矩控制。
[Abstract]:Objective to establish a three-dimensional finite element model including upper dentition, periodontal ligament, alveolar bone, straight wire appliance and buccal interroot implant Anchorage, and to analyze the mechanics of three kinds of distal maxillary molars by finite element method (FEM). It includes microimplant Anchorage for distal maxillary second molars, microimplant Anchorage for both maxillary first and second molars, and microimplant Anchorage for whole distal maxillary molars, which provides biomechanical reference for distal maxillary molar movement in orthodontic clinic. Methods the CT images of maxillary bone and maxillary dentition were obtained by cone beam CT (cone beam CT,CBCT) scanning, and a series of computer aided design software and finite element analysis software were used to establish the images of maxillary dentition, periodontal ligament and alveolar bone. The three-dimensional finite element model of orthodontic appliance and buccal interroot micro-implant Anchorage was studied, and three kinds of distal maxillary molars were simulated. (1) Ni-Ti push spring thrust 2.5N was simulated between the maxillary first molar and the second molar, and the results were as follows: (1) Niti push spring thrust was simulated between the maxillary first molars and the second molars. The traction hook was fixed with the head of the micro-implant nail to simulate the support resistance of the micro-implant to move the maxillary second molar. (2) Ni-Ti spring thrust 2.5 N was simulated between the second maxillary premolar and the first molar, and the traction hook was fixed with the micro-implant nail head to simulate the Anchorage of the micro-implant to move the maxillary first and second molars at the same time. (3) the traction force 2.5 N was applied between the traction hook and the head of the microimplant nail to simulate the whole distal upper dentition of the microimplant. The initial displacement of all teeth in three-dimensional direction and the normal stress distribution of periodontal ligament were calculated by finite element analysis software. Results the three-dimensional finite element model of buccal interroot microimplant Anchorage of maxillary molars with high accuracy was established. The results of finite element calculation under this Anchorage system showed that: (1) when the second maxillary molar was moved far away, the results of the finite element analysis showed that: (1) when the maxillary second molar was moved far away, the results of the finite element calculation under this Anchorage system showed that: The second molar had obvious sagittal distally inclined movement, horizontal buccal tilt and distal rotation, as well as vertical distal and middle depression, and the anterior tooth Anchorage was well controlled. (2) when the maxillary first and second molars were moved at the same time, both the first and second molars had obvious sagittal distally inclined movement, horizontal buccal tilt and distal rotation movement, and vertical distal and middle depression. However, the tendency of tilt and displacement in the above movement were smaller than those in the second molar alone, while the Anchorage control of the anterior teeth in the sagittal direction was slightly weaker, and a small amount of lip inclination appeared. (3) when the whole distal upper dentition was moved, a small amount of external expansion was observed on both sides of the arch. The sagittal upward dentition moves distally, and the distal displacement decreases from the incisor to the second molar. (4) the maximum normal stress of periodontal ligament of the distal molars was 18 KPA, 14 KPA, and 4 KPA, respectively, and the vertical incisor was significantly depressed in the posterior teeth. (4) the maximal normal stress values of the periodontal ligament in the distal molars were 18 KPA, 14 KPA and 4 KPA, respectively, and that in the anterior tooth segment was significantly tilted toward the tongue, and that in the posterior teeth was slightly distally inclined. Conclusion in the buccal interroot microimplant system established in this study, (1) different modes of distal molar migration have different effects on the displacement of upper dentition and the stress distribution of periodontal ligament. [WT5 "HZ] conclusion: (1) different modes of distal molar movement have different effects on the displacement of upper dentition and the stress distribution of periodontal ligament. (2) under the same thrust, the sagittal initial displacement of the single molar was higher than that of the two molars at the same time, and the Anchorage control of the anterior teeth was better, but the inclination of the molars was more obvious than that of the two molars at the same time. (3) the whole distal movement of the upper dentition may cause obvious tongue tilting of the anterior teeth, so the torque control of the anterior teeth should be paid special attention.
【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：R783.6
本文編號：2435926
[Abstract]:Objective to establish a three-dimensional finite element model including upper dentition, periodontal ligament, alveolar bone, straight wire appliance and buccal interroot implant Anchorage, and to analyze the mechanics of three kinds of distal maxillary molars by finite element method (FEM). It includes microimplant Anchorage for distal maxillary second molars, microimplant Anchorage for both maxillary first and second molars, and microimplant Anchorage for whole distal maxillary molars, which provides biomechanical reference for distal maxillary molar movement in orthodontic clinic. Methods the CT images of maxillary bone and maxillary dentition were obtained by cone beam CT (cone beam CT,CBCT) scanning, and a series of computer aided design software and finite element analysis software were used to establish the images of maxillary dentition, periodontal ligament and alveolar bone. The three-dimensional finite element model of orthodontic appliance and buccal interroot micro-implant Anchorage was studied, and three kinds of distal maxillary molars were simulated. (1) Ni-Ti push spring thrust 2.5N was simulated between the maxillary first molar and the second molar, and the results were as follows: (1) Niti push spring thrust was simulated between the maxillary first molars and the second molars. The traction hook was fixed with the head of the micro-implant nail to simulate the support resistance of the micro-implant to move the maxillary second molar. (2) Ni-Ti spring thrust 2.5 N was simulated between the second maxillary premolar and the first molar, and the traction hook was fixed with the micro-implant nail head to simulate the Anchorage of the micro-implant to move the maxillary first and second molars at the same time. (3) the traction force 2.5 N was applied between the traction hook and the head of the microimplant nail to simulate the whole distal upper dentition of the microimplant. The initial displacement of all teeth in three-dimensional direction and the normal stress distribution of periodontal ligament were calculated by finite element analysis software. Results the three-dimensional finite element model of buccal interroot microimplant Anchorage of maxillary molars with high accuracy was established. The results of finite element calculation under this Anchorage system showed that: (1) when the second maxillary molar was moved far away, the results of the finite element analysis showed that: (1) when the maxillary second molar was moved far away, the results of the finite element calculation under this Anchorage system showed that: The second molar had obvious sagittal distally inclined movement, horizontal buccal tilt and distal rotation, as well as vertical distal and middle depression, and the anterior tooth Anchorage was well controlled. (2) when the maxillary first and second molars were moved at the same time, both the first and second molars had obvious sagittal distally inclined movement, horizontal buccal tilt and distal rotation movement, and vertical distal and middle depression. However, the tendency of tilt and displacement in the above movement were smaller than those in the second molar alone, while the Anchorage control of the anterior teeth in the sagittal direction was slightly weaker, and a small amount of lip inclination appeared. (3) when the whole distal upper dentition was moved, a small amount of external expansion was observed on both sides of the arch. The sagittal upward dentition moves distally, and the distal displacement decreases from the incisor to the second molar. (4) the maximum normal stress of periodontal ligament of the distal molars was 18 KPA, 14 KPA, and 4 KPA, respectively, and the vertical incisor was significantly depressed in the posterior teeth. (4) the maximal normal stress values of the periodontal ligament in the distal molars were 18 KPA, 14 KPA and 4 KPA, respectively, and that in the anterior tooth segment was significantly tilted toward the tongue, and that in the posterior teeth was slightly distally inclined. Conclusion in the buccal interroot microimplant system established in this study, (1) different modes of distal molar migration have different effects on the displacement of upper dentition and the stress distribution of periodontal ligament. [WT5 "HZ] conclusion: (1) different modes of distal molar movement have different effects on the displacement of upper dentition and the stress distribution of periodontal ligament. (2) under the same thrust, the sagittal initial displacement of the single molar was higher than that of the two molars at the same time, and the Anchorage control of the anterior teeth was better, but the inclination of the molars was more obvious than that of the two molars at the same time. (3) the whole distal movement of the upper dentition may cause obvious tongue tilting of the anterior teeth, so the torque control of the anterior teeth should be paid special attention.
【學(xué)位授予單位】：青島大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：R783.6
【參考文獻】
相關(guān)期刊論文 前10條
1 周婷婷;雷勇華;謝爾婷;李惠怡;;成人骨性Ⅱ類錯顴牙槽嵴區(qū)骨質(zhì)厚度的CBCT研究[J];中國美容醫(yī)學(xué);2016年06期
2 常粲然;杜軍;李二紅;楊勇;;顴牙槽嵴處植入微螺釘種植體在支抗推上磨牙向遠中移位中的效果[J];中國口腔種植學(xué)雜志;2015年02期
3 張向鳳;王超;夏熹;鄧鋒;張翼;;細絲弓技術(shù)舌側(cè)內(nèi)收上頜前牙的三維有限元生物力學(xué)分析[J];華西口腔醫(yī)學(xué)雜志;2015年03期
4 崔淑霞;丁睿U_;王淑敏;袁為;;比較2種部位種植釘支抗推上頜磨牙向遠中移動的效果[J];實用口腔醫(yī)學(xué)雜志;2014年06期
5 陳建明;蘇小元;;青少年腭部骨質(zhì)厚度的CBCT研究[J];實用口腔醫(yī)學(xué)雜志;2014年06期
6 張明燦;李洪發(fā);武杰;;正畸微種植體支抗的臨床應(yīng)用研究進展[J];北京口腔醫(yī)學(xué);2014年04期
7 阮曉慧;代海濤;劉海霞;;微種植體支抗推磨牙向遠中移動的臨床應(yīng)用[J];口腔醫(yī)學(xué);2014年06期
8 潘桂芬;麥理想;蔡斌;姚宇;陳悅娜;王大為;;錐形束CT測量不同矢狀骨面型青少年腭部骨厚度[J];中華口腔醫(yī)學(xué)研究雜志(電子版);2014年02期
9 王世興;王鵬來;趙俊杰;張良;;微鈦釘種植體支抗后移全牙弓16例臨床分析[J];口腔醫(yī)學(xué);2014年02期
10 安曉莉;陳宏偉;司慶宗;周又和;劉斌;王記增;;搖椅弓滑動法整體內(nèi)收上頜前牙的三維有限元分析[J];華西口腔醫(yī)學(xué)雜志;2013年01期
相關(guān)碩士學(xué)位論文 前1條
1 丁睿US;頰側(cè)微種植體支抗推磨牙向遠中的三維有限元分析[D];鄭州大學(xué);2014年
，本文編號：2435926
本文鏈接：http://sikaile.net/yixuelunwen/kouq/2435926.html
最近更新
教材專著
