本文選題：磁性附著體 + 覆蓋義齒　； 參考：《吉林大學(xué)學(xué)報(bào)(醫(yī)學(xué)版)》2014年04期

【摘要】：目的:研究自然牙根和種植體聯(lián)合支持的磁固位全口覆蓋義齒不同受力狀態(tài)下支持骨的應(yīng)力分布,為臨床修復(fù)設(shè)計(jì)提供參考。方法:采用CT技術(shù)、計(jì)算機(jī)圖像處理系統(tǒng)及Solidworks有限元軟件,根據(jù)自然牙根與種植體不同位置,放置3對(duì)磁性附著體,建立3組下頜覆蓋義齒的三維有限元模型,其中模型Ⅰ種植體在磨牙區(qū),模型Ⅱ種植體在兩側(cè),模型Ⅲ種植體在一側(cè)。在不同的應(yīng)力加載下對(duì)3組模型中自然牙和種植體頸部骨應(yīng)力進(jìn)行計(jì)算,對(duì)比和分析。結(jié)果:模型Ⅱ斜向加載下后牙區(qū)種植體周圍骨應(yīng)力較模型Ⅲ增加明顯。斜向加載較垂直加載的支持骨應(yīng)力均有增加,其中模型Ⅰ中的后牙區(qū)種植體周圍骨應(yīng)力增加約30%,模型Ⅱ增加約43%,模型Ⅲ增加約55%。結(jié)論:當(dāng)口內(nèi)僅余留1個(gè)自然牙根時(shí),至少應(yīng)增加2個(gè)種植體作為基牙,且這2個(gè)種植體應(yīng)位于牙弓的兩側(cè),即一側(cè)前牙區(qū)和另一側(cè)的后牙區(qū)。磁性附著體的結(jié)構(gòu)比其他類型的附著體能更好地防止側(cè)向力對(duì)基牙的損害。
[Abstract]:Objective: To study the stress distribution of the supported bone under the different stress state of the magnetic retainer full denture supported by natural tooth root and implant, and to provide reference for the clinical repair design. Methods: using CT technology, computer image processing system and Solidworks finite element software, 3 pairs of magnetic attachment were placed according to the different positions of the natural root and the implant. The three-dimensional finite element model of 3 groups of mandibular overdentures was established in the body, in which model I implant was in the molar area, model II implant was on both sides, model III implant was on one side. Under different stress loading, the bone stress of the natural teeth and implant neck in the 3 models was calculated, compared and analyzed. Results: Model II oblique loading under the posterior teeth. The bone stress around the implant was more obvious than that of the model III. The support bone stress in the oblique loading was increased by 30%, the model II increased by about 43%, and the model III increased by about 55%. conclusion: at least 2 implants should be increased when only 1 natural roots were left in the mouth. For the base teeth, the 2 implants should be located on both sides of the dental arch, that is, one side of the anterior teeth and the other side of the posterior teeth. The structure of the magnetic attachment is better than other types of attachments to prevent the lateral force from damaging the base teeth.

【作者單位】： 包頭醫(yī)學(xué)院口腔學(xué)院修復(fù)教研室;包頭醫(yī)學(xué)院第一附屬醫(yī)院口腔科;吉林大學(xué)機(jī)械工程學(xué)院生物力學(xué)教研室;吉林大學(xué)校醫(yī)院;
【基金】：內(nèi)蒙古自治區(qū)科技廳社會(huì)發(fā)展項(xiàng)目資助課題(2010956)
【分類號(hào)】：R783.6

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