Topography and Microhardness Changes of Nanofilled Resin Composite Restorations Submitted to Different Finishing and Polishing Systems and Erosive Challenge
Pesqui. bras. odontopediatria clín. integr
;
20: e4812, 2020. tab, graf
Article
Dans Anglais
| LILACS, BBO
| ID: biblio-1091638
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 andMethods:
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.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Érosion dentaire
/
Résines composites
/
Émail dentaire
/
Dentine
/
Incisive
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
Pesqui. bras. odontopediatria clín. integr
Thème du journal:
Dentisterie
Année:
2020
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Federal University of Rio de Janeiro/BR
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS