The aim of this study was to investigate the effects of two bleaching systems on micro hardness, surface roughness and color stability of two novel dental composites. Ormocer based restorative Admira and nano-filled c...The aim of this study was to investigate the effects of two bleaching systems on micro hardness, surface roughness and color stability of two novel dental composites. Ormocer based restorative Admira and nano-filled composite Clearfil Majesty Esthetic were bleached with 10% carbamide peroxide （Opalescence PF） or 35% hydrogen peroxide （Beyond Max 5） and subsequently immersed in four different staining solutions （coffee, tea, red wine, and cola）. Distilled water was used as a control. Color measurements were performed with a spectrophotometer. Vickers micro hardness and roughness data were analyzed with two- way analysis of variance for repeated measures. The analysis of variance was used to compare the color change values. Duncan＇s multiple comparison test was applied to compare the results （a = 5%）. AE~＂ values over 3.3 were considered clinically unacceptable. Micro hardness and surface roughness values of the tested composites were decreased significantly after bleaching applications. Red wine and tea storage caused perceptible discolorations in the composite resin materials after 30 days of 3-hour immersion. Home or office bleaching applications can affect the surface properties of resin composites and accelerate the staining process.展开更多
A method of treating pulpless coloured anterior tooth is presented.Most part ofthe coloured dentin of the labial crown was removed and the dental structure was bleachedwith 30% hydrogen peroxide for 5min.The pulp cavi...A method of treating pulpless coloured anterior tooth is presented.Most part ofthe coloured dentin of the labial crown was removed and the dental structure was bleachedwith 30% hydrogen peroxide for 5min.The pulp cavity was then filled with whitephoto-curing composite.The result of the treatment is quite satisfactory.With our treatment,the intact contour of the crown and the hardness and gloss of the enamel are preserved.SEM proved that the composite was tightly bound with the enamel of the medial wall of thepulp cavity,forming an entity with the tooth,thus guaranteeing the strength of the crown.展开更多
目的:评价不同载体、不同浓度过氧化脲(Car bami de Per oxi de,CP)漂白剂对粘结釉质强度的影响。方法:60颗离体磨牙随机分为7组。1～6组颊舌面分别用以卡波姆(Carbopol)、聚乙烯吡咯烷酮(PVP)、泊洛沙姆(Pol oxamer)为增稠载体的含100g...目的:评价不同载体、不同浓度过氧化脲(Car bami de Per oxi de,CP)漂白剂对粘结釉质强度的影响。方法:60颗离体磨牙随机分为7组。1～6组颊舌面分别用以卡波姆(Carbopol)、聚乙烯吡咯烷酮(PVP)、泊洛沙姆(Pol oxamer)为增稠载体的含100g/L CP、200g/L CP的漂白剂在37℃、100%湿度条件下每天漂白8h,其中部分样本再浸入10%的抗坏血酸钠凝胶中3h,持续2周后即刻粘结树脂或延迟2周粘结。7组为对照组。准备界面为1mm×1mm的条形试件。通过微拉伸法测试釉质粘结强度,对不同类型的断面进行扫描电镜(scanni ng el ect i on mi croscope,SEM)观察。利用Spss11.0软件通过双因素方差分析(Two-way anal ysi s of var i ance)和SNK-q检验对其微拉伸粘结强度(iM cr ot ensi l e bond st r engt h,MTBS)进行统计分析。结果:各实验组2周漂白后即刻粘结,釉质粘结强度明显低于对照组(P<0.05);10%CP漂白同时抗氧化治疗或延迟粘结,釉质的粘结强度和对照组没有明显差异(P>0.05);20%CP漂白同时抗氧化治疗或延迟粘结,可明显提高釉质的粘结强度(P<0.05),但和对照组仍有显著差异(P<0.05)。同种载体下,经10%CP漂白后的釉质粘结强度高于20%CP漂白组(P<0.05)。同种浓度下,不同增稠载体组间的粘结强度没有显著差异(P>0.05)。结论:漂白后即刻粘结,釉质的粘结强度随CP浓度的增高而下降;延迟2周粘结或抗氧化治疗可从一定程度上提高釉质的粘结强度,缩短漂白后粘结的时间;增稠载体对釉质的粘结强度没有显著影响。展开更多
目的评价冷光漂白对在不同充填时机使用不同粘接剂的复合树脂充填体边缘微渗漏的影响。方法选取新鲜拔除的健康前磨牙40颗,在其颊面制备Ⅴ类洞,按随机数字表法分为A^J共10组,每组4颗。A^E组使用AdperTM Single Bond2全酸蚀粘接剂,分别...目的评价冷光漂白对在不同充填时机使用不同粘接剂的复合树脂充填体边缘微渗漏的影响。方法选取新鲜拔除的健康前磨牙40颗,在其颊面制备Ⅴ类洞,按随机数字表法分为A^J共10组,每组4颗。A^E组使用AdperTM Single Bond2全酸蚀粘接剂,分别于漂白前、漂白后即刻、漂白后1周、漂白后2周及未漂白时充填,F^J组使用AdperTM Easy One自酸蚀粘接剂分别于上述时间充填,其中E组与J组为对照组(未漂白组),所有牙使用FilitekTMZ350XT复合树脂进行充填。冷热循环并染色后,颊舌向剖开,牙科显微镜下测量记录染料渗入洞壁的深度。结果①在相同充填时间使用AdperTMSingle Bond2的充填物微渗漏较使用AdperTMEasy One小(P<0.05,P<0.01)。②冷光漂白前、漂白后即刻与漂白后1周使用2种粘接剂树脂充填,均较未漂白边缘微渗漏增加(P<0.05);漂白后2周使用2种粘接剂树脂充填,与未漂白微渗漏比较差异无统计学意义(P>0.05)。结论使用全酸蚀粘接剂的树脂充填物微渗漏较小,最好在冷光漂白2周后进行树脂充填,而漂白前已经存在的充填物则应该在漂白后更换。展开更多
基金Funded by the Research Fund of Ataturk University(Nos.2009/324,2011/43)
文摘The aim of this study was to investigate the effects of two bleaching systems on micro hardness, surface roughness and color stability of two novel dental composites. Ormocer based restorative Admira and nano-filled composite Clearfil Majesty Esthetic were bleached with 10% carbamide peroxide （Opalescence PF） or 35% hydrogen peroxide （Beyond Max 5） and subsequently immersed in four different staining solutions （coffee, tea, red wine, and cola）. Distilled water was used as a control. Color measurements were performed with a spectrophotometer. Vickers micro hardness and roughness data were analyzed with two- way analysis of variance for repeated measures. The analysis of variance was used to compare the color change values. Duncan＇s multiple comparison test was applied to compare the results （a = 5%）. AE~＂ values over 3.3 were considered clinically unacceptable. Micro hardness and surface roughness values of the tested composites were decreased significantly after bleaching applications. Red wine and tea storage caused perceptible discolorations in the composite resin materials after 30 days of 3-hour immersion. Home or office bleaching applications can affect the surface properties of resin composites and accelerate the staining process.
文摘A method of treating pulpless coloured anterior tooth is presented.Most part ofthe coloured dentin of the labial crown was removed and the dental structure was bleachedwith 30% hydrogen peroxide for 5min.The pulp cavity was then filled with whitephoto-curing composite.The result of the treatment is quite satisfactory.With our treatment,the intact contour of the crown and the hardness and gloss of the enamel are preserved.SEM proved that the composite was tightly bound with the enamel of the medial wall of thepulp cavity,forming an entity with the tooth,thus guaranteeing the strength of the crown.
文摘目的:评价不同载体、不同浓度过氧化脲(Car bami de Per oxi de,CP)漂白剂对粘结釉质强度的影响。方法:60颗离体磨牙随机分为7组。1～6组颊舌面分别用以卡波姆(Carbopol)、聚乙烯吡咯烷酮(PVP)、泊洛沙姆(Pol oxamer)为增稠载体的含100g/L CP、200g/L CP的漂白剂在37℃、100%湿度条件下每天漂白8h,其中部分样本再浸入10%的抗坏血酸钠凝胶中3h,持续2周后即刻粘结树脂或延迟2周粘结。7组为对照组。准备界面为1mm×1mm的条形试件。通过微拉伸法测试釉质粘结强度,对不同类型的断面进行扫描电镜(scanni ng el ect i on mi croscope,SEM)观察。利用Spss11.0软件通过双因素方差分析(Two-way anal ysi s of var i ance)和SNK-q检验对其微拉伸粘结强度(iM cr ot ensi l e bond st r engt h,MTBS)进行统计分析。结果:各实验组2周漂白后即刻粘结,釉质粘结强度明显低于对照组(P<0.05);10%CP漂白同时抗氧化治疗或延迟粘结,釉质的粘结强度和对照组没有明显差异(P>0.05);20%CP漂白同时抗氧化治疗或延迟粘结,可明显提高釉质的粘结强度(P<0.05),但和对照组仍有显著差异(P<0.05)。同种载体下,经10%CP漂白后的釉质粘结强度高于20%CP漂白组(P<0.05)。同种浓度下,不同增稠载体组间的粘结强度没有显著差异(P>0.05)。结论:漂白后即刻粘结,釉质的粘结强度随CP浓度的增高而下降;延迟2周粘结或抗氧化治疗可从一定程度上提高釉质的粘结强度,缩短漂白后粘结的时间;增稠载体对釉质的粘结强度没有显著影响。
