本文選題：Er + Cr：YSGG激光　； 參考：《大連醫(yī)科大學(xué)》2012年碩士論文

【摘要】：目的：研究Er,Cr:YSGG激光在不同距離、不同功率條件下照射牙本質(zhì)洞壁表面后，對光固化復(fù)合樹脂充填體邊緣微滲漏的影響。以獲得最佳照射距離及照射功率，以期為Er,Cr:YSGG激光的臨床應(yīng)用提供實驗依據(jù)。 方法：選用近期因正畸要求而拔除的正常前磨牙55顆，用高速裂鉆磨除近遠中面的牙釉質(zhì)暴露牙本質(zhì)，形成4mm×4mm平面。在平面上制備出3mm×3mm×2mm的洞型（洞長、寬為3mm；洞深為2mm）。將55顆牙隨機分成11組（A.B.C.D.E.F.G.H.I.J.K），每組5顆，10個洞。（A.B.C.D.E.F.G.H.I.J）為實驗組，K為對照組（不經(jīng)過激光照射）。實驗組按激光不同照射距離（2mm、3mm）隨機分為2組，按不同照射功率(1w、2w、3w、4w、6w)將每組分為5個亞組。分別用Er,Cr:YSGG激光不同距離（2mm、3mm），，不同功率(1w、2w、3w、4w、6w)激光照射牙本質(zhì)洞壁6s，自酸蝕粘結(jié)劑處理后光固化復(fù)合樹脂充填。經(jīng)冷熱循環(huán)染色后，采用染料滲入法在體視顯微鏡下觀察充填體邊緣滲漏情況；樣本經(jīng)常規(guī)掃描電鏡制樣后在電鏡下觀察充境體邊緣洞壁結(jié)合情況。采用SPSS13.0軟件包對數(shù)據(jù)進行統(tǒng)計學(xué)處理。 結(jié)果：1.立體顯微鏡下觀察：①激光照射距離2mm時，對照組（不經(jīng)過激光照射）的染料滲入評分最大，與實驗組之間的差異有統(tǒng)計學(xué)意義（P＜0.05），而實驗組各個功率之間的差異無統(tǒng)計學(xué)意義（P＞0.05）。 ②激光照射距離2mm時，對照組（不經(jīng)過激光照射）的染料滲入評分最大，與實驗組之間的差異有統(tǒng)計學(xué)意義（P＜0.05），而實驗組各個功率之間的差異無統(tǒng)計學(xué)意義（P＞0.05）。 2.掃描電鏡下觀察：①當激光照射距離2mm時，功率2w、3w的充填體邊緣微縫隙寬度與1w、4w、6w、對照組的充填體邊緣微縫隙寬度差異具有統(tǒng)計學(xué)意義（P＜0.05）；2w、3w兩組之間充填體邊緣微縫隙寬度差異無統(tǒng)計學(xué)意義（P＞0.05）；1w、4w、6w、對照組四組之間充填體邊緣微縫隙寬度差異無統(tǒng)計學(xué)意義（P＞0.05）。 ②當激光照射距離3mm時，功率4w、6w的充填體邊緣微縫隙寬度與功率1w、2w、3w、對照組的充填體邊緣微縫隙寬度差異具有統(tǒng)計學(xué)意義（P＜0.05）；4w、6w兩組之間充填體邊緣微縫隙寬度之間差異無統(tǒng)計學(xué)意義（P＞0.05）；1w、2w、3w、對照組四組之間充填體邊緣微縫隙寬度差異無統(tǒng)計學(xué)意義（P＞0.05）。 ③在功率相同時，當功率1w時，激光照射距離2mm的充填體邊緣微縫隙寬度與照射距離3mm的充填體邊緣微縫隙寬度差異無統(tǒng)計學(xué)意義（P＞0.05）；當功率2w、3w時，激光照射距離2mm的充填體邊緣微縫隙寬度明顯小于照射距離3mm的充填體邊緣微縫隙寬度差異具有統(tǒng)計學(xué)意義（P＜0.05）；當功率4w、6w時，激光照射距離3mm的充填體邊緣微縫隙寬度明顯小于照射距離2mm的充填體邊緣微縫隙寬度差異具有統(tǒng)計學(xué)意義（P＜0.05）。 結(jié)論：當照射距離2mm，功率2w、3w時；照射距離3mm，功率4w、6w時，能有效提高光固化復(fù)合樹脂與牙體組織間的密合度，并能減少充填體邊緣微滲漏，可作為Er,Cr:YSGG激光照射牙本質(zhì)洞壁的最佳照射距離及照射功率。
[Abstract]:Objective: To study the effect of Er, Cr:YSGG laser irradiation on the marginal microleakage of the composite resin filling body on the surface of the dentine cavity under different distances and different power conditions, in order to obtain the best irradiation distance and irradiation power, in order to provide the experimental basis for the clinical application of Er and Cr:YSGG laser.
Methods: 55 normal premolars were extracted from the recent orthodontic requirements. The dentin was exposed to the enamel of the proximal surface with high speed drill, and the 4mm x 4mm plane was formed. The holes of 3mm x 3mm x 2mm were prepared on the plane (the length of the hole, the width was 3mm, the depth of the cavity 2mm). The 55 teeth were randomly divided into 11 groups (A.B.C.D.E.F.G.H.I.J.K), each group was 5 and 10 holes. (A.B.C.D.E.F.G.H.I.J) for the experimental group, K was the control group (without laser irradiation). The experimental group was randomly divided into 2 groups according to the different laser irradiation distance (2mm, 3mm). Each group was divided into 5 subgroups according to the different irradiation power (1W, 2W, 3W, 4W, 6W). The laser irradiated the dentine wall of the tooth with the different distances of Er, Cr:YSGG laser and different power. 6S, light cured composite resin filled with acid etching adhesive. After colcolation, dyestuff infiltration was used to observe the leakage of the edge of the filling body under the stereograph. The sample regular scanning electron microscopy was used to observe the boundary wall binding condition of the boundary of the boundary of the filling body under the electron microscope. The statistics of the data were carried out by the SPSS13.0 software package. Reason.
Results: 1. stereoscopic microscope observation: (1) when the laser irradiation distance 2mm, the control group (without laser irradiation) dyestuff infiltration score was the largest, and the difference between the experimental group was statistically significant (P < 0.05), but there was no statistical difference between the experimental group (P > 0.05).
2. When the laser irradiation distance was 2mm, the dye infiltration score of the control group (without laser irradiation) was the largest, and the difference between the experimental group and the experimental group was statistically significant (P < 0.05), but the difference between the power of the experimental group was not statistically significant (P > 0.05).
2. scanning electron microscopy (SEM): (1) when the laser irradiation distance 2mm, the width of the marginal gap of the filling body edge of the power 2W, 3W and 1W, 4W, 6W, the marginal gap width of the filling body edge of the control group has statistical significance (P < 0.05); 2W, 3W two groups between the filling body edge micro gap width difference is not statistically significant (P > 0.05); 1W, 4W, restraint, control group There was no significant difference in the width of the gap between the four groups (P > 0.05).
(2) when laser irradiation distance 3mm, power 4W, 6W filling body edge micro gap width and power 1W, 2W, 3W, the marginal gap width difference of the filling body edge of the control group has statistical significance (P < 0.05); 4W, 6W two groups between the filling body edge micro gap width difference is not statistically significant (P > 0.05); 1W, 2W, four groups between the control group filling There was no significant difference in the width of the gap between the edges of the filling body (P > 0.05).
(3) when the power is the same, when the power is 1W, there is no significant difference between the edge micro gap width of the filling body edge of the laser irradiation distance 2mm and the light distance 3mm of the filling body edge micro gap width (P > 0.05). When the power 2W, 3W, the width of the filling body edge micro gap width of the laser irradiation distance 2mm is obviously smaller than that of the filling body edge of the irradiation distance 3mm. The gap width difference was statistically significant (P < 0.05). When the power 4W, 6W, the width of the edge micro gap of the filling body edge of the laser irradiation distance 3mm was obviously smaller than that of the backfilling body (P < 0.05), the gap width difference between the filling body edge and the filling body was statistically significant (P < 0.05).
Conclusion: when irradiation distance 2mm, power 2W, 3W, irradiation distance 3mm, power 4W, 6W, can effectively improve the consistency between the light cured composite resin and the tooth tissue, and reduce the microleakage on the edge of the filling body, which can be used as the optimum shooting distance and irradiation power of the Er and Cr:YSGG laser to irradiate the dentinal cavity wall.
【學(xué)位授予單位】：大連醫(yī)科大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：R783.1

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