Microleakage at Occlusal Margins Versus Cervical Margins of Thermocycled Preheated Class V Resin Composite Restorations | ||
| Al-Azhar Assiut Dental Journal | ||
| Article 15, Volume 6, Issue 1, April 2023, Pages 151-159 PDF (2.45 M) | ||
| DOI: 10.21608/aadj.2023.296430 | ||
| Authors | ||
| Ahmed A. Goda* 1; Aly Sayed2; Dina Ezz3 | ||
| 1Department of Operative Den- tistry, Faculty of Dental Medi- cine (Boys), Assiut, Al-Azhar University, Egypt | ||
| 2of dental biomaterials department. faculty of dentistry Assiut university. Egypt2 | ||
| 3department of Conservative Dentistry Cairo University | ||
| Abstract | ||
| Aim: to quantify the effect of presence of enamel wall and thermocycling on marginal microleakage of class V cavities restored with preheated bulk-fill or preheated nano-filled composite. Methods: Class V cavities were prepared on the buccal surface of forty-eight extracted maxillary first premolars. The teeth were divided into two groups according to the type of preheated composite used (either bulk-fill or Nano-filled) and further subdivided according to thermocycling or no thermocycling. The teeth were immersed in 0.5% methylene blue dye solution for 24 hours at room temperature and then sectioned buccolingually to examine the extent of microleakage by dye penetration. Microleakage was assessed by a stereomicroscope at 40x magnification and measured in micrometers depending on the extent of dye penetration for both occlusal and gingival walls separately. Statistical analysis was done by Kruskal-Wallis test for comparison between groups and Mann-Whitney test for comparing occlusal and gingival dye penetration in each group. Results: preheated Nano-filled composite subjected to thermocycling showed more significantly microleakage than other groups (P < 0.05). Microleakage was significantly more (P < 0.05) in gingival (cervical) walls of teeth compared to occlusal walls in all groups except preheated Nano-filled composite directed to thermocycling which showed no significant difference between gingival and occlusal walls (P > 0.05). Conclusions: thermocycling of preheated Nanofilled composite produced more microleakage than thermocycling of preheated bulkfilled composite. More microleakage was recorded in cervical areas than occlusal areas of class V cavities. | ||
| Keywords | ||
| Microleakage; preheated composite; bulk-fill; Nano-filled; thermocycling | ||
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