發(fā)布時間：2018-03-22 18:30

  本文選題：牙種植體　切入點：骨結(jié)合　出處：《口腔醫(yī)學研究》2017年07期 　論文類型：期刊論文

【摘要】：目的:研究熱刺激取出骨結(jié)合牙種植體的條件,建立熱刺激微創(chuàng)取出骨結(jié)合牙種植體的動物模型。方法:選用4只1~2歲雜種犬為實驗動物,拔除雙側(cè)下頜第三或第四前磨牙,2個月后常規(guī)植入牙種植體,3個月后經(jīng)臨床及放射學檢查,確定骨結(jié)合形成,隨機選取右側(cè)為實驗側(cè),組成實驗組,分別以(48±1)℃持續(xù)1min(簡稱A因素)、(53±1)℃持續(xù)2.5min(B)、(59±1)℃持續(xù)3.5min(C)刺激實驗側(cè)種植體,于每次熱刺激前及刺激后4周測量種植體穩(wěn)定性系數(shù)(ISQ),改良菌斑指數(shù)(modified plaque index,mPLI),探診深度(probing depth,PD),觀察影像學表現(xiàn)以及能否用扭矩扳手取出種植體,左側(cè)為對照側(cè),組成對照組,不施加任何熱刺激,測量項目同實驗組。采用SPSS22.0統(tǒng)計軟件對實驗數(shù)據(jù)進行統(tǒng)計分析。結(jié)果:A、B因素刺激前和刺激后4周,實驗組與對照組相比,ISQ、mPLI,PD無顯著性差異,影像學無明顯變化,無法用扭矩扳手取出種植體。C因素刺激后4周與對照組相比,實驗組ISQ明顯下降,差異具有顯著性(P0.05),根尖X片顯示種植體周圍出現(xiàn)線形低密度影,低密度影外側(cè)骨密度略有增高,但mPLI,PD實驗組和對照組無顯著性差異,實驗組采用50Ncm的扭矩可以取出種植體,對照組無法取出。種植體取出術(shù)后2個月,實驗組牙槽骨基本愈合,與取出術(shù)前相比,牙槽嵴寬度和高度無顯著性變化。結(jié)論:動物實驗顯示,已完成骨結(jié)合的種植體在(59±1)℃持續(xù)3.5 min熱刺激條件下可使其周圍骨質(zhì)出現(xiàn)有限破壞,從而破壞其骨結(jié)合,達到微創(chuàng)取出種植體的目的,成功建立了熱刺激取出骨結(jié)合牙種植體動物模型。
[Abstract]:Objective: to study the condition of extraction of osseous and dental implants by thermal stimulation, and to establish an animal model of osseous and dental implants taken out by thermal stimulation. Methods: four mongrel dogs aged 1 or 2 years were selected as experimental animals. Bilateral mandibular third or fourth premolars were extracted and implanted into dental implants 2 months later. After 3 months clinical and radiologic examinations were performed to determine the formation of bone union. The right side was randomly selected as the experimental side to form the experimental group. The experimental implants were stimulated at 48 鹵1 鈩，

本文編號：1649861