Microleakage of class v glass ionomer restorations after conventional and Er:YAG laser preparation

被引:22
|
作者
Delme, Katleen Ilse Maria
Deman, Peter Jean
Nammour, Samir
Gentil De Moor, Roeland Jozef
机构
[1] Univ Ghent, Ghent Univ Clin, Dept Operat Dent & Endodontol, Sch Dent, Ghent, Belgium
[2] Univ Liege, Fac Med, Dept Dent Sci, Liege, Belgium
关键词
D O I
10.1089/PHO.2006.1078
中图分类号
R61 [外科手术学];
学科分类号
摘要
Objective: The aim of this study was to investigate the microleakage in class V cavities following Er:YAG laser or conventional preparation restored with two conventional glass ionomer cements (cGIC) and to evaluate the effect of conditioning on laser-prepared surfaces. Background Data: Information on this topic related to cGIC is scarce. Methods: Sixty class V cavities were assigned to six groups: I and IV were Er:YAG-lased, 11 and V Er:YAG-lased and conditioned, and III and VI conventionally prepared and conditioned. Groups 1, 11, and 111, were restored with Ketac Fil Plus Applicap; groups IV, V, and VI were restored with Fuji IX GP Capsule. Then, teeth were stored in distilled water (37 degrees C, 24 h), thermal cycled 1500 times (5-55 degrees C), placed in a 2% aqueous solution of methylene blue (37 degrees C, 24 h), embedded in acrylic resin, sectioned oro-facially, and analyzed for leakage. Results: Statistically significant differences between occlusal and cervical regions were observed (p < 0.05). Group III showed significantly more microleakage at the occlusal margin compared to group H (p = 0.022). Group V showed significantly more microleakage at the gingival margin than group VI (p = 0.022). Leakage on the occlusal margins was significantly higher in group III than in group VI (p = 0.038). Scanning electron microscopy indicated that conditioning of laser-prepared dentin with Ketac conditioner partially closed the tubules' orifices, whereas the use of GC conditioner completely obliterated the tubules. Conclusion: The application of Ketac Fil Plus to laser-prepared enamel and dentin resulted in a better and more reproducible seal compared to conventionally prepared tooth surfaces. When using the more viscous Fuji IX application, Er:YAG lasing did not improve marginal adaptation.
引用
收藏
页码:715 / 722
页数:8
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