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Topography and Microhardness Changes of Nanofilled Resin Composite Restorations Submitted to Different Finishing and Polishing Systems and Erosive Challenge
Canto, Fernanda Michel Tavares; Alexandria, Adílis Kalina; Magno, Marcela Baraúna; Silva, Eduardo Moreira da; Maia, Lucianne Cople.
Affiliation
  • Canto, Fernanda Michel Tavares; Federal University of Rio de Janeiro. Department of Pediatric Dentistry and Orthodontics. Rio de Janeiro. BR
  • Alexandria, Adílis Kalina; Federal University of Rio de Janeiro. Department of Pediatric Dentistry and Orthodontics. Rio de Janeiro. BR
  • Magno, Marcela Baraúna; Federal University of Rio de Janeiro. Department of Pediatric Dentistry and Orthodontics. Rio de Janeiro. BR
  • Silva, Eduardo Moreira da; s.af
  • Maia, Lucianne Cople; Federal University of Rio de Janeiro. Department of Pediatric Dentistry and Orthodontics. Rio de Janeiro. BR
Article ي En | LILACS, BBO | ID: biblio-1091638
المكتبة المسؤولة: BR1264.1
ABSTRACT
Abstract

Objective:

To evaluate the topography and microhardness of composite resin restorations submitted to different finishing and polishing systems before and after erosive challenge. Material and

Methods:

Thirty standardized cavities prepared in enamel-dentin blocks of bovine incisors were restored with Z350 composite resin, and randomly distributed into three groups (n=10) according to the finishing and polishing systems G1 = Soflex 4 steps, G2 = Soflex Spiral 2 steps and G3 = PoGo (single step). The specimens were half protected with nail varnish and submitted to five immersions in Pepsi Twist®, for 10 minutes each, five times/day during six consecutive days. The initial and final challenge surface microhardness (SMHinitial and SMHfinal) of the composite resin was evaluated and the percentage of SMH loss (%SMHL) was calculated. After protection removal, the topographic change linear (Ra) and volumetric (Sa) roughness was evaluated in initial and final areas by using 3D non-contact optical profilometry and scanning electron microscopy (SEM). Data were analyzed by paired Student's t-test, Kruskal-Wallis test, and by ANOVA and Tukey's test.

Results:

There was significant intra-group %SMHL in composite resin (p<0.05). Differences among groups in %SMHL, Ra/Sa in resin composite were not observed (p>0.05). SEM images revealed structural changes between the initial and final surfaces for all groups.

Conclusion:

The three types of finishing and polishing systems had a similar influence on %SMHL, Ra and Sa in the nanofilled composite resin.
الموضوعات
Key words

النص الكامل: 1 الفهرس: LILACS الموضوع الرئيسي: Tooth Erosion / Composite Resins / Dental Enamel / Dentin / Incisor المحددات: Animals اللغة: En مجلة: Pesqui. bras. odontopediatria clín. integr موضوع المجلة: ODONTOLOGIA السنة: 2020 نوع: Article

النص الكامل: 1 الفهرس: LILACS الموضوع الرئيسي: Tooth Erosion / Composite Resins / Dental Enamel / Dentin / Incisor المحددات: Animals اللغة: En مجلة: Pesqui. bras. odontopediatria clín. integr موضوع المجلة: ODONTOLOGIA السنة: 2020 نوع: Article