The effect of light curing tip distance on the curing depth of bulk fill resin based composites
المؤلفون المشاركون
Baban, Luma M.
Malik, Ali Husayn
المصدر
Journal of Baghdad College of Dentistry
العدد
المجلد 26، العدد 4 (31 ديسمبر/كانون الأول 2014)، ص ص. 46-53، 8ص.
الناشر
تاريخ النشر
2014-12-31
دولة النشر
العراق
عدد الصفحات
8
التخصصات الرئيسية
الموضوعات
الملخص EN
Background : This in vitro study measure and compare the effect of light curing tip distance on the depth of cure by measuring vickers microhardness value on two recently launched bulk fill resin based composites Tetric EvoCeram Bulk Fill and Surefil SDR Flow with 4 mm thickness in comparison to Filtek Z250 Universal Restorative with 2 mm thickness.
In addition, measure and compare the bottom to top microhardness ratio with different light curing tip distances.
Materials and Method : One hundred fifty composite specimens were obtained from two cylindrical plastic molds the first one for bulk fill composites (Tetric EvoCeram Bulk Fill and Surefil SDR Flow) with 4 mm diameter and 4 mm depth, the second one for Filtek Z250 Universal Restorative with 4 mm diameter and 2 mm depth.
Each spcimen was light-cured using WOODPECKER LED CURING LIGHT for 20 sec.
Polymerization was performed with the light tip positioned in direct contact, 2 mm, 4 mm, 6 mm and 8 mm distant from the top surface of the sample.
After one day of storage in distilled water in a light proof container at 37˚C, the hardness on the bottom and top surfaces of each specimen was tested using the Digital Micro Vickers Hardness Tester.
Then the Data were analyzed statistically by ANOVA test, LSD test and t-test.
Results : All experimental groups show top microhardness higher than bottom microhardness with high significant difference with all light tip distances.
At 0 mm light tip distance all groups give the highest microhardness value.
Filtek Z250 Universal Restorative shows accepted bottom to top microhardness ratio at all light tip distances.
Surefil SDR Flow shows accepted bottom to top ratio only at 0, 2 and 4mm light tip distances while Tetric EvoCeram Bulk Fill shows the bottom to top microhardness ratio less than the accepted value with all light tip distances.
Conclusion : From the results of this study we can conclude that the polymerization of bulk fill composite depends greatly on the distance from light curing tip, Tetric EvoCeram Bulk Fill composite not recommended to be used as bulk fill restoration in deep cavities and need further studies, while Surefil SDR Flow not recommended to be used in deep cavity when curing tip distance (6-8 mm), in addition we can conclude that the thickness of the increments is more important than light curing tip distance.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Malik, Ali Husayn& Baban, Luma M.. 2014. The effect of light curing tip distance on the curing depth of bulk fill resin based composites. Journal of Baghdad College of Dentistry،Vol. 26, no. 4, pp.46-53.
https://search.emarefa.net/detail/BIM-433486
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Malik, Ali Husayn& Baban, Luma M.. The effect of light curing tip distance on the curing depth of bulk fill resin based composites. Journal of Baghdad College of Dentistry Vol. 26, no. 4 (Dec. 2014), pp.46-53.
https://search.emarefa.net/detail/BIM-433486
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Malik, Ali Husayn& Baban, Luma M.. The effect of light curing tip distance on the curing depth of bulk fill resin based composites. Journal of Baghdad College of Dentistry. 2014. Vol. 26, no. 4, pp.46-53.
https://search.emarefa.net/detail/BIM-433486
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references : p. 52-53
رقم السجل
BIM-433486
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر