Mohamed Aly Mohamed Badr El-Agwany , Marwa Mohamed Wahsh , Tarek Salah Morsi
{"title":"贴面工艺及后续老化对双层氧化锆透光性的影响","authors":"Mohamed Aly Mohamed Badr El-Agwany , Marwa Mohamed Wahsh , Tarek Salah Morsi","doi":"10.1016/j.fdj.2018.05.009","DOIUrl":null,"url":null,"abstract":"<div><h3>Purpose</h3><p>this study compared the translucency of zirconia specimens veneered with different veneering techniques, and compared the change in translucency after aging.</p></div><div><h3>Materials and methods</h3><p>Fifty slice specimens (0.50 ± 0.01 mm thick) were fabricated of IPS e.maxZirCAD core material, and ZL1 IPS e.maxZirLiner (0.10-mm thick) was layered. The specimens were randomly divided into five groups (n = 10/group). Group Ι (traditional layering technique) was veneered (0.60 mm) by condensing and sintering IPS e.max Ceram low-fusing nano-fluorapatite veneering porcelain; Group ΙΙ (High translucency press on technique) was veneered (0.60 mm) by heat-pressing HT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙΙΙ (Low translucency press on technique) was veneered (0.60 mm) by heat-pressing LT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙѴ (High translucency CAD-ON technique) was veneered (0.60 mm) by HT IPS e.max CAD lithium disilicate glass ceramic blocks and GroupѴ (Low translucency CAD-ON technique) was veneered (0.60 mm) by LT IPS e.max CAD lithium disilicate glass ceramic blocks. CIE (L∗, a∗, b∗) parameters were measured and translucency was calculated for each veneering technique before and after aging according to the following equation: TP = [(L<sup>∗</sup><sub>B</sub>-L<sup>∗</sup><sub>W</sub>)<sup>2</sup> + (a<sup>∗</sup><sub>B</sub>-a<sup>∗</sup><sub>W</sub>)<sup>2</sup> + (b<sup>∗</sup><sub>B</sub>-b<sup>∗</sup><sub>W</sub>)<sup>2</sup>]<sup>1/2</sup>. One-way analysis of variance (ANOVA) combined with Bonferroni's post-hoc test and Paired <em>t</em>-test were used to analyze the data (<em>α</em> = 0.05).</p></div><div><h3>Results</h3><p>Statistical analysis utilizing One-way ANOVA showed that, pressing technique had higher translucency than build-up and CAD on techniques. There was a significant difference between the three techniques except for the low translucency Pressing and CAD on techniques when compared with the build up after aging. Using Paired-t test to determine the effect of aging, a significant decrease of translucency was found in all techniques after aging except for the low translucency Pressing and CAD on techniques.</p></div><div><h3>Conclusion</h3><p>Veneering zirconia with both layering and pressing techniques produced more translucent samples than with CAD-ON veneering technique. Aging caused a decrease in translucency of all samples.</p></div>","PeriodicalId":100562,"journal":{"name":"Future Dental Journal","volume":"4 2","pages":"Pages 274-278"},"PeriodicalIF":0.0000,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.fdj.2018.05.009","citationCount":"3","resultStr":"{\"title\":\"Effect of veneering techniques and subsequent aging on translucency of bilayered zirconia\",\"authors\":\"Mohamed Aly Mohamed Badr El-Agwany , Marwa Mohamed Wahsh , Tarek Salah Morsi\",\"doi\":\"10.1016/j.fdj.2018.05.009\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Purpose</h3><p>this study compared the translucency of zirconia specimens veneered with different veneering techniques, and compared the change in translucency after aging.</p></div><div><h3>Materials and methods</h3><p>Fifty slice specimens (0.50 ± 0.01 mm thick) were fabricated of IPS e.maxZirCAD core material, and ZL1 IPS e.maxZirLiner (0.10-mm thick) was layered. The specimens were randomly divided into five groups (n = 10/group). Group Ι (traditional layering technique) was veneered (0.60 mm) by condensing and sintering IPS e.max Ceram low-fusing nano-fluorapatite veneering porcelain; Group ΙΙ (High translucency press on technique) was veneered (0.60 mm) by heat-pressing HT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙΙΙ (Low translucency press on technique) was veneered (0.60 mm) by heat-pressing LT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙѴ (High translucency CAD-ON technique) was veneered (0.60 mm) by HT IPS e.max CAD lithium disilicate glass ceramic blocks and GroupѴ (Low translucency CAD-ON technique) was veneered (0.60 mm) by LT IPS e.max CAD lithium disilicate glass ceramic blocks. CIE (L∗, a∗, b∗) parameters were measured and translucency was calculated for each veneering technique before and after aging according to the following equation: TP = [(L<sup>∗</sup><sub>B</sub>-L<sup>∗</sup><sub>W</sub>)<sup>2</sup> + (a<sup>∗</sup><sub>B</sub>-a<sup>∗</sup><sub>W</sub>)<sup>2</sup> + (b<sup>∗</sup><sub>B</sub>-b<sup>∗</sup><sub>W</sub>)<sup>2</sup>]<sup>1/2</sup>. One-way analysis of variance (ANOVA) combined with Bonferroni's post-hoc test and Paired <em>t</em>-test were used to analyze the data (<em>α</em> = 0.05).</p></div><div><h3>Results</h3><p>Statistical analysis utilizing One-way ANOVA showed that, pressing technique had higher translucency than build-up and CAD on techniques. There was a significant difference between the three techniques except for the low translucency Pressing and CAD on techniques when compared with the build up after aging. Using Paired-t test to determine the effect of aging, a significant decrease of translucency was found in all techniques after aging except for the low translucency Pressing and CAD on techniques.</p></div><div><h3>Conclusion</h3><p>Veneering zirconia with both layering and pressing techniques produced more translucent samples than with CAD-ON veneering technique. Aging caused a decrease in translucency of all samples.</p></div>\",\"PeriodicalId\":100562,\"journal\":{\"name\":\"Future Dental Journal\",\"volume\":\"4 2\",\"pages\":\"Pages 274-278\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.fdj.2018.05.009\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Future Dental Journal\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2314718017300678\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Future Dental Journal","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2314718017300678","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effect of veneering techniques and subsequent aging on translucency of bilayered zirconia
Purpose
this study compared the translucency of zirconia specimens veneered with different veneering techniques, and compared the change in translucency after aging.
Materials and methods
Fifty slice specimens (0.50 ± 0.01 mm thick) were fabricated of IPS e.maxZirCAD core material, and ZL1 IPS e.maxZirLiner (0.10-mm thick) was layered. The specimens were randomly divided into five groups (n = 10/group). Group Ι (traditional layering technique) was veneered (0.60 mm) by condensing and sintering IPS e.max Ceram low-fusing nano-fluorapatite veneering porcelain; Group ΙΙ (High translucency press on technique) was veneered (0.60 mm) by heat-pressing HT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙΙΙ (Low translucency press on technique) was veneered (0.60 mm) by heat-pressing LT IPS e.maxZirPressfluorapatite glass-ceramic ingots; Group ΙѴ (High translucency CAD-ON technique) was veneered (0.60 mm) by HT IPS e.max CAD lithium disilicate glass ceramic blocks and GroupѴ (Low translucency CAD-ON technique) was veneered (0.60 mm) by LT IPS e.max CAD lithium disilicate glass ceramic blocks. CIE (L∗, a∗, b∗) parameters were measured and translucency was calculated for each veneering technique before and after aging according to the following equation: TP = [(L∗B-L∗W)2 + (a∗B-a∗W)2 + (b∗B-b∗W)2]1/2. One-way analysis of variance (ANOVA) combined with Bonferroni's post-hoc test and Paired t-test were used to analyze the data (α = 0.05).
Results
Statistical analysis utilizing One-way ANOVA showed that, pressing technique had higher translucency than build-up and CAD on techniques. There was a significant difference between the three techniques except for the low translucency Pressing and CAD on techniques when compared with the build up after aging. Using Paired-t test to determine the effect of aging, a significant decrease of translucency was found in all techniques after aging except for the low translucency Pressing and CAD on techniques.
Conclusion
Veneering zirconia with both layering and pressing techniques produced more translucent samples than with CAD-ON veneering technique. Aging caused a decrease in translucency of all samples.
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