本文選題：微種植體 + 有限元方法　； 參考：《應(yīng)用數(shù)學(xué)和力學(xué)》2015年S1期

【摘要】：研究微種植體植入位置與鄰牙不同距離時(shí),其鄰牙牙周組織的應(yīng)力分布規(guī)律,從而找出合適的植入位置。依據(jù)CT圖像和微種植體的數(shù)據(jù),建立含微種植體的上頜前牙整體內(nèi)收三維有限元模型。托槽與相應(yīng)的牙齒之間進(jìn)行綁定,弓絲與每個(gè)托槽之間的相互作用考慮為接觸。在微種植體和牽引鉤上施加1.5 N的正畸力,分析微種植體分別距離第一磨牙0.1 mm、0.55 mm、1 mm、1.45 mm和1.9 mm時(shí),其鄰牙牙周組織的應(yīng)力分布規(guī)律。結(jié)果表明,隨著微種植體到鄰牙距離的減小,其牙周組織的應(yīng)力將逐漸增大,牙槽骨的應(yīng)力最大增加了1.2倍;且微種植體與鄰牙距離較近時(shí),牙周組織將會出現(xiàn)明顯的應(yīng)力集中。因此,在正畸治療中應(yīng)盡量讓微種植體植入在兩鄰牙的中間位置。
[Abstract]:The stress distribution of the periodontal tissue of the adjacent teeth was studied when the microimplant was located at different distance from the adjacent teeth, so as to find out the appropriate implant location. Based on CT images and the data of microimplants, a three-dimensional finite element model of maxillary anterior teeth with microimplants was established. The brackets are bound to the corresponding teeth, and the interaction between the arch wire and each bracket is considered as contact. The orthodontic force of 1.5 N was applied on the microimplant and the traction hook. The stress distribution of the adjacent periodontal tissue was analyzed when the microimplant was 0.55 mm or 1.45 mm and 1.9 mm from the first molar, respectively. The results showed that the stress of periodontal tissue increased gradually and the stress of alveolar bone increased 1.2 times with the decrease of the distance between microimplant and adjacent teeth, and when the distance between microimplant and adjacent teeth was close, the stress of alveolar bone increased 1.2 times, and when the distance between microimplant and adjacent teeth was close, There will be significant stress concentration in periodontal tissue. Therefore, in orthodontic treatment, microimplants should be implanted in the middle of the adjacent teeth.
【作者單位】： 四川大學(xué)生物力學(xué)工程省重點(diǎn)實(shí)驗(yàn)室;中航工業(yè)611所二部;北京航空航天大學(xué)生物與醫(yī)學(xué)工程學(xué)院生物力學(xué)與力生物學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(11202143)~~
【分類號】：R783.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

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