個(gè)性化舌側(cè)矯治不同加載方式內(nèi)收上前牙的生物力學(xué)特征
發(fā)布時(shí)間：2018-07-21 09:19
【摘要】：目的 分析個(gè)性化舌側(cè)矯治系統(tǒng)，在利用微種植體滑動(dòng)法內(nèi)收上前牙的過(guò)程中，不同加載方式對(duì)前牙生物力學(xué)特征的影響，為臨床醫(yī)師使用e-Brace個(gè)性化舌側(cè)矯治，選用最佳的加載方式內(nèi)收上前牙、關(guān)閉拔牙間隙，提供生物力學(xué)參考依據(jù)。 方法 選取一名牙列完整的健康成年女性，以其個(gè)別正常牙合作為建模素材，結(jié)合CBCT掃描技術(shù)及Mimics14.11、Geomagic Studio12、Pro/E5.0、SolidWorks2013和ANSYS Workbench13.0等軟件，建立包含e-Brace個(gè)性化舌側(cè)托槽、牙齒、牙周膜、牙槽骨、弓絲、微種植體以及頰側(cè)透明樹(shù)脂扣在內(nèi)的三維有限元模型，并進(jìn)行網(wǎng)格劃分。連接尖牙托槽牽引鉤與腭側(cè)微種植體，，或頰側(cè)扣與頰側(cè)微種植體，以確定矯治力方向。在單純腭側(cè)加載或頰腭側(cè)同時(shí)加載2N牽引力的不同加力方式下，牽引鉤長(zhǎng)度分別為2mm、2.2mm、2.4mm時(shí)，分析前牙位移和牙周膜表面第一主應(yīng)力的變化。 結(jié)果 1三維有限元模型的建立 采用本研究方法建立的三維有限元模型,包含e-Brace個(gè)性化舌側(cè)托槽、牙齒、牙周膜、牙槽骨、弓絲、微種植體以及頰側(cè)透明樹(shù)脂扣。每個(gè)模型具有40個(gè)實(shí)體,區(qū)別僅為牽引鉤長(zhǎng)度不同的尖牙托槽，完全可以滿(mǎn)足課題后續(xù)研究的需要。 2不同加載方式對(duì)前牙牙列位移的影響 2.1不同加載方式對(duì)前牙水平方向位移的影響： 不同加載方式中，中切牙和側(cè)切牙位移分布基本不變，內(nèi)翻趨勢(shì)漸弱，整體趨于穩(wěn)定；與單純腭側(cè)加力不同的是，在頰側(cè)加力影響下，尖牙由近中部分漸弱的內(nèi)翻趨勢(shì)轉(zhuǎn)變?yōu)檫h(yuǎn)中部分漸強(qiáng)的內(nèi)翻趨勢(shì)。 牽引鉤為2.4mm，在單純腭側(cè)加載時(shí)，前牙出現(xiàn)最小位移；而在頰腭側(cè)同時(shí)加載時(shí)，前牙出現(xiàn)最大位移。 2.2不同加載方式對(duì)前牙矢狀方向位移的影響： 不同加載方式中，中切牙整體較穩(wěn)定，無(wú)明顯翻轉(zhuǎn)現(xiàn)象；與單純腭側(cè)加力不同的是，在頰側(cè)加力影響下，側(cè)切牙整體由明顯內(nèi)傾趨勢(shì)變得較為穩(wěn)定，尖牙牙尖處內(nèi)收舌傾趨勢(shì)明顯。 牽引鉤為2.4mm，單純腭側(cè)加載，前牙出現(xiàn)最小位移；而牽引鉤為2.0mm，頰腭側(cè)同時(shí)加載，前牙出現(xiàn)最大位移。 2.3不同加載方式對(duì)前牙垂直方向位移的影響: 不同加載方式中，中切牙表現(xiàn)為明顯伸長(zhǎng)下垂趨勢(shì)，但是側(cè)切牙及尖牙舌隆突偏遠(yuǎn)中部分表現(xiàn)為壓低趨勢(shì)；隨著牽引鉤長(zhǎng)度的增加，單純腭側(cè)加力時(shí)，前牙最終表現(xiàn)為伸長(zhǎng)趨勢(shì)漸弱，但在頰側(cè)加力的影響下，中切牙與尖牙則表現(xiàn)為伸長(zhǎng)趨勢(shì)漸強(qiáng)。 牽引鉤為2.2mm，單純腭側(cè)加載，前牙出現(xiàn)最小位移；而牽引鉤為2.0mm，頰腭側(cè)同時(shí)加載，前牙出現(xiàn)最大位移。 3不同加載方式對(duì)前牙牙周膜表面第一主應(yīng)力的影響： 不同加載方式作用下，中切牙和側(cè)切牙牙周膜頸部腭側(cè)、尖牙牙周膜頸部腭側(cè)與遠(yuǎn)中部分牙周膜表面第一主應(yīng)力為負(fù)值，牙周膜處于壓縮狀態(tài)；中切牙牙周膜頸部唇側(cè)及根尖腭側(cè)、側(cè)切牙周膜頸部唇側(cè)小部分、尖牙牙周膜頸部唇側(cè)小部分表面第一主應(yīng)力為正值，牙周膜處于拉伸狀態(tài)。 隨著牽引鉤長(zhǎng)度的增加，在單純腭側(cè)加力時(shí)，前牙牙周膜表面受拉或壓應(yīng)力減小，而頰腭側(cè)同時(shí)加力時(shí)，前牙牙周膜表面拉或壓應(yīng)力先明顯減小后輕微增大。 結(jié)論 1本研究建立的三維有限元模型幾何相似性與力學(xué)相似性強(qiáng)，滿(mǎn)足了實(shí)驗(yàn)?zāi)M加載的需要，可有效地進(jìn)行三維有限元法的力學(xué)分析求解。 2不同加載方式中，中切牙、側(cè)切牙在水平方向及矢狀方向上均只出現(xiàn)輕微的內(nèi)傾趨勢(shì)，而在垂直方向上出現(xiàn)明顯的伸長(zhǎng)下垂趨勢(shì)；而尖牙在不同方向上均表現(xiàn)明顯的位移趨勢(shì)。 3不同加載方式中，前牙牙周膜表面第一主應(yīng)力集中體現(xiàn)的部位主要在牙頸部。牽引鉤為2.0mm、單純腭側(cè)加力的組合加載方式，前牙牙周膜所受應(yīng)力最大；而牽引鉤為2.2mm、頰腭側(cè)同時(shí)加力的組合加載方式，前牙牙周膜所受應(yīng)力最小。
[Abstract]:objective
The effect of different loading methods on the biomechanical characteristics of anterior teeth in the process of using the micro implant sliding method to receive the anterior teeth was analyzed by the individualized lingual treatment system, which provided a biomechanical reference for the clinicians to use the e-Brace individualized tongue correction, the best way of loading the anterior teeth, and the clearance of the tooth extraction.
Method
A healthy adult female with a complete dentition was selected as the modeling material for their individual normal occlusion, combined with CBCT scanning technology and Mimics14.11, Geomagic Studio12, Pro/E5.0, SolidWorks2013 and ANSYS Workbench13.0 software to establish individual tongue side brackets containing e-Brace, teeth, periodontal membrane, alveolar bone, arch wire, micro implant and cheek. A three-dimensional finite element model of the transparent resin buckle is used to mesh the mesh, connecting the canine brackets and palatal micro implants, or buccal and buccal micro implants to determine the direction of the correction force. The length of the traction hook is 2mm, 2.2mm, and 2.4mm, respectively, under the simple palatine loading or the buccal and palatal side loading of the 2N traction. The changes of anterior tooth displacement and the first principal stress on the surface of periodontal ligament were analyzed.
Result
The establishment of 1 three-dimensional finite element model
The three-dimensional finite element model established by this method includes e-Brace individualized tongue side brackets, teeth, periodontal membranes, alveolar bone, pantograph, micro implant, and buccal transparent resin buckle. Each model has 40 entities, and the difference is only a canine bracket with different length of the traction hook, which can fully meet the needs of the follow-up research.
The effect of 2 different loading methods on the displacement of anterior teeth
2.1 effect of different loading methods on horizontal displacement of anterior teeth:
In the different loading methods, the displacement distribution of the incisor and the lateral incisor is basically the same, the trend of the inner varus is weaker and the whole tends to be stable.
The traction hook was 2.4mm. When the palatal side was loaded, the anterior teeth had the smallest displacement. While the buccal palatal side was loaded at the same time, the maximum displacement of the front teeth appeared.
2.2 effect of different loading modes on sagittal displacement of anterior teeth:
In the different loading methods, the central incisor was more stable and no obvious reversal. Unlike the simple palatine force, the lateral incisor became more stable under the influence of the cheek side force, and the tendency of the apex of the cusp was obvious.
The traction hook was 2.4mm, the palatal loading was the only way, the anterior teeth had the smallest displacement, while the traction hook was 2.0mm, the buccal palatal side was loaded at the same time, and the anterior teeth had the largest displacement.
2.3 effect of different loading methods on vertical displacement of anterior teeth:
In the different loading methods, the middle incisor showed a trend of obvious elongation and drooping, but the lateral incisor and the canine protuberance in the remote part showed a trend of depression. With the increase of the length of the traction hook, the anterior teeth finally showed the trend of elongation, but the middle incisor and the canine were elongated with the influence of the buccal side force. The trend is getting stronger.
The traction hook was 2.2mm, the palatal loading was the only way, the anterior teeth had the smallest displacement, while the traction hook was 2.0mm, the buccal palatal side was loaded at the same time, and the anterior teeth had the largest displacement.
3 the effect of different loading methods on the first principal stress on the periodontal ligament of anterior teeth.
Under the action of different loading methods, the middle incisor and the lateral incisor of the periodontal membrane were in the neck and the palate, the first principal stress was negative and the periodontal membrane was in the compression state, the middle incisor periodontal membrane was in the neck lip and the apical palate side, the small part of the periapical periapical neck of the lateral incisor and the small part of the lip of the canine periodontal membrane. The first principal stress is positive and the periodontal ligament is stretched.
With the increase of the length of the traction hook, the tension or compressive stress on the surface of the anterior periodontal membrane decreased while the anterior lateral force of the palate was reduced, while the tension or compressive stress on the surface of the anterior periodontal membrane decreased slightly and then slightly increased when the buccal and palatal side was simultaneously added.
conclusion
1 the geometric similarity of the three-dimensional finite element model established by the study is strong and the mechanical similarity is strong, which satisfies the needs of the experimental simulation loading, and can be effectively solved by the mechanical analysis of the three-dimensional finite element method.
2 of the different loading methods, the middle incisors and lateral incisors were only slightly introverted in the horizontal and sagittal direction, but the vertical direction was obvious in the vertical direction, while the incisors showed significant displacement in different directions.
3 in different loading ways, the first main stress concentration of the front periodontal ligament is mainly in the tooth neck. The traction hook is 2.0mm, the combined loading mode of the simple palatal side force is the most stress, while the traction hook is 2.2mm, the buccal and palate side is combined with the loading method, the stress of the anterior periodontal membrane is the least.
【學(xué)位授予單位】：暨南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：R783.5
本文編號(hào)：2135061
[Abstract]:objective
The effect of different loading methods on the biomechanical characteristics of anterior teeth in the process of using the micro implant sliding method to receive the anterior teeth was analyzed by the individualized lingual treatment system, which provided a biomechanical reference for the clinicians to use the e-Brace individualized tongue correction, the best way of loading the anterior teeth, and the clearance of the tooth extraction.
Method
A healthy adult female with a complete dentition was selected as the modeling material for their individual normal occlusion, combined with CBCT scanning technology and Mimics14.11, Geomagic Studio12, Pro/E5.0, SolidWorks2013 and ANSYS Workbench13.0 software to establish individual tongue side brackets containing e-Brace, teeth, periodontal membrane, alveolar bone, arch wire, micro implant and cheek. A three-dimensional finite element model of the transparent resin buckle is used to mesh the mesh, connecting the canine brackets and palatal micro implants, or buccal and buccal micro implants to determine the direction of the correction force. The length of the traction hook is 2mm, 2.2mm, and 2.4mm, respectively, under the simple palatine loading or the buccal and palatal side loading of the 2N traction. The changes of anterior tooth displacement and the first principal stress on the surface of periodontal ligament were analyzed.
Result
The establishment of 1 three-dimensional finite element model
The three-dimensional finite element model established by this method includes e-Brace individualized tongue side brackets, teeth, periodontal membranes, alveolar bone, pantograph, micro implant, and buccal transparent resin buckle. Each model has 40 entities, and the difference is only a canine bracket with different length of the traction hook, which can fully meet the needs of the follow-up research.
The effect of 2 different loading methods on the displacement of anterior teeth
2.1 effect of different loading methods on horizontal displacement of anterior teeth:
In the different loading methods, the displacement distribution of the incisor and the lateral incisor is basically the same, the trend of the inner varus is weaker and the whole tends to be stable.
The traction hook was 2.4mm. When the palatal side was loaded, the anterior teeth had the smallest displacement. While the buccal palatal side was loaded at the same time, the maximum displacement of the front teeth appeared.
2.2 effect of different loading modes on sagittal displacement of anterior teeth:
In the different loading methods, the central incisor was more stable and no obvious reversal. Unlike the simple palatine force, the lateral incisor became more stable under the influence of the cheek side force, and the tendency of the apex of the cusp was obvious.
The traction hook was 2.4mm, the palatal loading was the only way, the anterior teeth had the smallest displacement, while the traction hook was 2.0mm, the buccal palatal side was loaded at the same time, and the anterior teeth had the largest displacement.
2.3 effect of different loading methods on vertical displacement of anterior teeth:
In the different loading methods, the middle incisor showed a trend of obvious elongation and drooping, but the lateral incisor and the canine protuberance in the remote part showed a trend of depression. With the increase of the length of the traction hook, the anterior teeth finally showed the trend of elongation, but the middle incisor and the canine were elongated with the influence of the buccal side force. The trend is getting stronger.
The traction hook was 2.2mm, the palatal loading was the only way, the anterior teeth had the smallest displacement, while the traction hook was 2.0mm, the buccal palatal side was loaded at the same time, and the anterior teeth had the largest displacement.
3 the effect of different loading methods on the first principal stress on the periodontal ligament of anterior teeth.
Under the action of different loading methods, the middle incisor and the lateral incisor of the periodontal membrane were in the neck and the palate, the first principal stress was negative and the periodontal membrane was in the compression state, the middle incisor periodontal membrane was in the neck lip and the apical palate side, the small part of the periapical periapical neck of the lateral incisor and the small part of the lip of the canine periodontal membrane. The first principal stress is positive and the periodontal ligament is stretched.
With the increase of the length of the traction hook, the tension or compressive stress on the surface of the anterior periodontal membrane decreased while the anterior lateral force of the palate was reduced, while the tension or compressive stress on the surface of the anterior periodontal membrane decreased slightly and then slightly increased when the buccal and palatal side was simultaneously added.
conclusion
1 the geometric similarity of the three-dimensional finite element model established by the study is strong and the mechanical similarity is strong, which satisfies the needs of the experimental simulation loading, and can be effectively solved by the mechanical analysis of the three-dimensional finite element method.
2 of the different loading methods, the middle incisors and lateral incisors were only slightly introverted in the horizontal and sagittal direction, but the vertical direction was obvious in the vertical direction, while the incisors showed significant displacement in different directions.
3 in different loading ways, the first main stress concentration of the front periodontal ligament is mainly in the tooth neck. The traction hook is 2.0mm, the combined loading mode of the simple palatal side force is the most stress, while the traction hook is 2.2mm, the buccal and palate side is combined with the loading method, the stress of the anterior periodontal membrane is the least.
【學(xué)位授予單位】：暨南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：R783.5
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