Er，Cr：YSGG激光照射牙本质后对复合树脂充填体边缘微渗漏的影响

发布时间：2018-07-02 06:51

本文选题：Er + Cr：YSGG激光　；参考：《大连医科大学》2012年硕士论文

【摘要】：目的：研究Er,Cr:YSGG激光在不同距离、不同功率条件下照射牙本质洞壁表面后，对光固化复合树脂充填体边缘微渗漏的影响。以获得最佳照射距离及照射功率，以期为Er,Cr:YSGG激光的临床应用提供实验依据。方法：选用近期因正畸要求而拔除的正常前磨牙55颗，用高速裂钻磨除近远中面的牙釉质暴露牙本质，形成4mm×4mm平面。在平面上制备出3mm×3mm×2mm的洞型（洞长、宽为3mm；洞深为2mm）。将55颗牙随机分成11组（A.B.C.D.E.F.G.H.I.J.K），每组5颗，10个洞。（A.B.C.D.E.F.G.H.I.J）为实验组，K为对照组（不经过激光照射）。实验组按激光不同照射距离（2mm、3mm）随机分为2组，按不同照射功率(1w、2w、3w、4w、6w)将每组分为5个亚组。分别用Er,Cr:YSGG激光不同距离（2mm、3mm），，不同功率(1w、2w、3w、4w、6w)激光照射牙本质洞壁6s，自酸蚀粘结剂处理后光固化复合树脂充填。经冷热循环染色后，采用染料渗入法在体视显微镜下观察充填体边缘渗漏情况；样本经常规扫描电镜制样后在电镜下观察充境体边缘洞壁结合情况。采用SPSS13.0软件包对数据进行统计学处理。结果：1.立体显微镜下观察：①激光照射距离2mm时，对照组（不经过激光照射）的染料渗入评分最大，与实验组之间的差异有统计学意义（P＜0.05），而实验组各个功率之间的差异无统计学意义（P＞0.05）。 ②激光照射距离2mm时，对照组（不经过激光照射）的染料渗入评分最大，与实验组之间的差异有统计学意义（P＜0.05），而实验组各个功率之间的差异无统计学意义（P＞0.05）。 2.扫描电镜下观察：①当激光照射距离2mm时，功率2w、3w的充填体边缘微缝隙宽度与1w、4w、6w、对照组的充填体边缘微缝隙宽度差异具有统计学意义（P＜0.05）；2w、3w两组之间充填体边缘微缝隙宽度差异无统计学意义（P＞0.05）；1w、4w、6w、对照组四组之间充填体边缘微缝隙宽度差异无统计学意义（P＞0.05）。 ②当激光照射距离3mm时，功率4w、6w的充填体边缘微缝隙宽度与功率1w、2w、3w、对照组的充填体边缘微缝隙宽度差异具有统计学意义（P＜0.05）；4w、6w两组之间充填体边缘微缝隙宽度之间差异无统计学意义（P＞0.05）；1w、2w、3w、对照组四组之间充填体边缘微缝隙宽度差异无统计学意义（P＞0.05）。 ③在功率相同时，当功率1w时，激光照射距离2mm的充填体边缘微缝隙宽度与照射距离3mm的充填体边缘微缝隙宽度差异无统计学意义（P＞0.05）；当功率2w、3w时，激光照射距离2mm的充填体边缘微缝隙宽度明显小于照射距离3mm的充填体边缘微缝隙宽度差异具有统计学意义（P＜0.05）；当功率4w、6w时，激光照射距离3mm的充填体边缘微缝隙宽度明显小于照射距离2mm的充填体边缘微缝隙宽度差异具有统计学意义（P＜0.05）。结论：当照射距离2mm，功率2w、3w时；照射距离3mm，功率4w、6w时，能有效提高光固化复合树脂与牙体组织间的密合度，并能减少充填体边缘微渗漏，可作为Er,Cr:YSGG激光照射牙本质洞壁的最佳照射距离及照射功率。
[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.
【学位授予单位】：大连医科大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R783.1

【参考文献】