本文選題：窩溝封閉 + 微滲漏　； 參考：《安徽醫(yī)科大學(xué)》2014年碩士論文

【摘要】：目的：樹脂和玻璃離子都能用于窩溝封閉，兩種窩溝封閉材料均被證實具有較好的防齲效果。本實驗是對離體磨牙進行窩溝封閉，通過觀察浸泡不同時間下染料滲入牙體表面與封閉劑兩界面的情況以及離體牙片切過程中封閉材料的脫落情況，探討何種封閉劑與牙體表面結(jié)合的更緊密、微滲漏更細小，為臨床選擇使用何種封閉材料進行齲病的預(yù)防提供依據(jù)。 方法：本實驗選取80顆牙體完整，牙冠無齲壞、深窩溝、無磨耗、無隱裂、無釉質(zhì)發(fā)育和鈣化不全的離體牙作為實驗對象。 實驗一 將80顆離體牙隨機分為兩組，實驗組40顆離體牙使用光固化樹脂進行窩溝封閉，對照組40顆離體牙使用玻璃離子水門汀進行窩溝封閉。分別將兩組40顆封閉后的離體牙用粘蠟封閉根尖孔，距封閉劑邊緣1mm以外融蠟包裹并均勻涂布兩層指甲油，晾干。再將每組40顆經(jīng)融蠟處理過的離體牙隨機分為4個亞組，分別放入盛有2%的亞甲藍染料的器皿中浸泡1d、1周、1個月及3個月。以上8個小組記為實驗組A組、B組、C組、D組，對照組E組、F組、G組、H組。將浸泡后的離體牙沖洗去除指甲油，然后縱向剖開離體牙獲得切片樣本，顯微鏡下觀察各組封閉材料邊緣亞甲藍染色劑滲入情況。 實驗二 取實驗一浸泡后縱向剖開的8組離體牙切片樣本，顯微鏡下觀察各組封閉材料的脫落情況。 結(jié)果： 實驗一 1.封閉材料組內(nèi)比較：不同浸泡時間下4組光固化樹脂的亞甲藍滲透評估分數(shù)（P=0.020）差異有統(tǒng)計學(xué)意義。說明光固化樹脂的亞甲藍滲透程度隨著時間的延長而增加。不同浸泡時間下4組玻璃離子水門汀的亞甲藍滲透評估分數(shù)（P=0.015）差異有統(tǒng)計學(xué)意義。說明玻璃離子水門汀的亞甲藍滲透程度隨著時間的延長而增加。 2.封閉材料組間比較：浸泡1d、1周的光固化樹脂和玻璃離子水門汀的亞甲藍滲透評估分數(shù)（P=0.317，P=0.068）差異無統(tǒng)計學(xué)意義。浸泡1月、3月的光固化樹脂和玻璃離子水門汀的亞甲藍滲透評估分數(shù)（P=0.044，P=0.040）差異有統(tǒng)計學(xué)意義。 實驗二 1.封閉材料組內(nèi)比較：不同浸泡時間下4組光固化樹脂的切割脫落情況差異無統(tǒng)計學(xué)意義。光固化樹脂隨著時間的延長封閉劑未見明顯脫落。不同浸泡時間下4組玻璃離子水門汀的封閉劑切割脫落情況（P=0.025）差異有統(tǒng)計學(xué)意義。說明玻璃離子水門汀隨著浸泡時間的延長脫落率也增大。 2.封閉材料組間比較：浸泡1d、1周的光固化樹脂和玻璃離子水門汀的封閉材料切割脫落情況（P=0.211，，P=0.087）差異無統(tǒng)計學(xué)意義。浸泡1月、3月的光固化樹脂和玻璃離子水門汀的封閉材料切割脫落情況（P=0.003，P=0.000）差異有統(tǒng)計學(xué)意義。 結(jié)論：本實驗研究表明玻璃離子水門汀作為窩溝封閉材料可以發(fā)揮封閉效果，隨著時間的延長，染色滲透明顯、切割脫落率增加，封閉性能較光固化樹脂材料差。臨床上應(yīng)首選樹脂封閉劑。此外，光固化樹脂也存在一定程度的微滲漏，提示樹脂類封閉材料仍需要在提高封閉性能方面做進一步研究。
[Abstract]:Objective : Both resin and glass ions can be used for the sealing of the socket ditch , and the two kinds of socket sealing materials have been proved to have good effect of preventing caries . This experiment is to investigate the effect of the blocking agent on the interface between the surface of the tooth body and the blocking agent and the shedding of the sealing material during the cutting of the ex vivo . The paper discusses the closer the sealing agent and the surface of the tooth body combine , and the micro leakage is smaller , which provides the basis for the clinical choice of which sealing material is used for preventing dental caries .

Methods : 80 teeth were selected in this experiment without caries , deep fossa sulcus , no abrasion , no hidden fissure , no enamel development and calcification .

Experiment 1

Forty two groups were randomly divided into two groups : 40 in the experimental group were closed with light - curing resin and 40 in the control group were sealed with glass ionomer cement . Two groups were randomly divided into four subgroups : Group A , Group B , Group C , Group D , Group E , Group F , Group G , Group H .

Experiment 2

The specimens were taken from the specimens of 8 groups , which were longitudinally sectioned after immersion , and the shedding of each group was observed under the microscope .

Results :

Experiment 1

1 . The difference of methylene blue penetration fraction ( P = 0.020 ) of 4 groups of photo - cured resin under different soaking time was statistically significant . The difference of methylene blue penetration ( P = 0.015 ) in group 4 glass ionomer increased with time .

2 . There was no significant difference between the methylene blue permeation assessment scores ( P = 0.317 , P = 0.068 ) of the photo - cured resin and the glass ionomer cements at 1d and 1 week . The difference of the methylene blue permeation assessment scores ( P = 0.044 , P = 0 . 040 ) of the photo - cured resin and the glass ionomer cements were statistically significant in January and March .

Experiment 2

1 . There was no significant difference in the cut - off condition of 4 groups of photocuring resins in different soaking time . There was no significant drop in the sealing agent of the photocuring resin with time . The difference of the blocking agent of 4 groups of glass ionomer cements in different soaking time was statistically significant ( P = 0.025 ) .

2 . There was no significant difference in the cutting and dropping of the sealing materials of the photo - cured resin and the glass ionomer cement ( P = 0.211 , P = 0.087 ) in the soaking 1d and 1 week . The difference of the cutting and dropping of the sealing material of the photo - cured resin and the glass ionomer cements in the months of immersion ( P = 0.003 , P = 0.000 ) was statistically significant .

Conclusion : The experimental study shows that the glass ionomer cement can exert a close effect as the closed material of the socket . With the extension of time , the dye penetration is obvious , the cutting off rate is increased , and the sealing performance is worse than that of the photocurable resin . In addition , the resin sealant should be preferred in clinic . In addition , the photo - cured resin also has a certain degree of microleakage , and it is suggested that the resin - based sealing material still needs to be further studied in improving the sealing performance .
【學(xué)位授予單位】：安徽醫(yī)科大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：R781.1

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