Surface Roughness in Nanoparticle Resin Composites Subjected to Two Polishing Systems: An In vitro Comparative Study
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Fecha
2022-11-11Autor(es)
Cayo Rojas, César Félix
Ramírez-Vargas, Giovanna Gisella
Ladera-Castañeda, Marysela I.
López-Gurreonero, Carlos
Cornejo-Pinto, Alberto
Cachay-Criado, Hernán
Cervantes-Ganoza, Luis Adolfo
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Aim: The surface roughness of dental restorations can decrease resin durability,
since it leads to its deterioration, color variation, and loss of gloss. Therefore,
the aim was to assess the surface roughness of nanoparticle resin composites,
subjected to two different polishing systems. Materials and Methods: This
longitudinal in vitro experimental study consisted of 32 resin specimens made
according to ISO 4049-2019 and divided equally into four groups: A1: Palfique
LX5 / Sof-Lex, A2: Palfique LX5 / Super Snap, B1: Filtek Z350 XT / Sof-Lex,
and B2: Filtek Z350 XT / Super Snap. The samples were stored in distilled water
at 37°C for 24h. Surface roughness was measured with a digital roughness tester,
both before and after the polishing procedure. The data were analyzed with the
Student’s t-test for related samples, and with the inter-subject ANOVA test with
two factors; considering significance at P < 0.05. Results: The surface roughness
of Palfique LX5 resin with the Sof-lex system was 0.330 (CI: 0.282–0.378 µm)
and 0.170 (CI: 0.087–0.253 µm) before and after polishing, respectively. With the
Super Snap system, values of 0.448 (CI: 0.346–0.549 µm) and 0.206 (CI: 0.130–
0.282 µm) were obtained before and after polishing, respectively. For the Filtek
Z350 XT resin, the surface roughness obtained with the Sof-lex system was 0.353
(CI: 0.278–0.427 µm) and 0.134 (CI: 0.095–0.172 µm) before and after polishing,
respectively. With the Super Snap system, values of 0.334 (CI: 0.247–0.421 µm) and
0.171 (CI: 0.122–0.221 µm) were obtained before and after polishing, respectively.
Surface roughness did not show significant differences in all groups assessed both
before (P = 0.068) and after (P = 0.335) polishing. However, before and after
the application of the polishing systems, all groups significantly decreased their
surface roughness (P < 0.05). Further, when comparing this decrease among all
groups, no significant differences were observed (P = 0.437). Conclusion: The
surface roughness of the Filtek Z350 XT and Palfique LX5 nanoparticle resin
composites showed no significant differences when using the Sof-lex and Super
Snap polishing systems. However, both polishing systems significantly decreased
the surface roughness of the nanoparticulated resins, with this decrease being
similar in all groups.
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