1 research outputs found
Evaluation of Marginal Adaptation and Wear Resistance of Nanohybrid and Alkasite Restorative Resins
Introduction: Polymerisation shrinkage stresses developed
during curing of adhesive resin cements may cause debonding
at the margins of cavity leading to microgap formation with
secondary caries and consequently restorative failure. Thus,
a restoration should have good marginal integrity and wear
resistance to obtain high success with clinical longevity.
Aim: To compare the influence of thermo-mechanical stresses
on marginal quality and wear of class II Mesio-Occluso-Distal
(MOD) restorations filled with Solare Sculpt or Cention N.
Materials and Methods: An in vitro study was conducted at
GITAM Dental College and Hospital, Visakhapatnam on 80
human extracted mandibular molars by preparing mesioocclusal-distal class two cavities that restored either with Solare
Sculpt or Cention N resin composites. Baseline evaluations were
recorded for marginal gaps (in µm) through Scanning Electron
Microscope (SEM), and the weights of the samples were
recorded by an electronic balancing instrument to measure the
amount of wear (in grams). Following thermo-mechanical cyclic
loading, all the restored teeth were evaluated again to record
the same parameters. The statistical analysis was done using
Statistical Package for the Social Sciences (SPSS) programme for
windows version 22.0 (IBM, NY) software. An independent t-test
for intergroup comparison and a dependent t-test for intragroup
comparisons were done to analyse the tested parameters with
the significance level established at (p≤0.05).
Results: In intergroup comparison, no difference in marginal
adaptation was observed before thermo-mechanical loading
between two materials with a p-value of 0.3625, but after thermomechanical loading Cention N exhibited significantly superior
marginal adaptation with a p-value of 0.0374. Both the materials
have shown a significant difference in the marginal adaptation
after thermo-mechanical loading in the intragroup comparison
with Cention N (0.0002) and Solare sculpt (0.0001) p-values. The
wear rate was not different statistically between the materials
with a p-value of 0.7144 before thermo-mechanical loading and
0.2285 after thermo-mechanical loading.
Conclusion: Marginal adaptation of Cention N was superior to
Solare Sculpt, whereas both the materials exhibited a similar
wear rate