Authors :
Dr. Sadashiv Daokar; Dr. Kshama Sarak; Dr. Kartik Raman; Dr. Kalpana Pawar; Dr. Aishwarya Ranjalkar; Dr. Shivani Vyavahare; Dr. Shubhangi Gaysmindar
Volume/Issue :
Volume 8 - 2023, Issue 5 - May
Google Scholar :
https://bit.ly/3TmGbDi
Scribd :
https://tinyurl.com/tpsdmyup
DOI :
https://doi.org/10.5281/zenodo.8036539
Abstract :
Background: Most important concern in using composite
resins is, colour tends to change in course of time.
Discoloration of these materials compromises the
purpose and success of composite restorations over the
long period. Aim: The aim of this study is to check the
preheating effect of nanohybrid composite resin and its
colour stability when immersed in tea and coffee
solutions. Materials And Methods: This experimental
study included 60 nanohybrid composite disks with a
diameter of 5mm and thickness 2mm. 60 samples were
divided into 2 groups. Group 1 of 30 samples, composite
was placed in refrigerator and placed in plastic moulds
when it comes to room temperature. The samples were
polymerized for 40 seconds from both the sides. In group
2 of 30 samples, a composite gun containing composite
was placed in convection micro-oven and the
temperature was adjusted to 680C, the composite was
immediately inserted in plastic mould and cured from
both the sides. The samples are previously dried with
moisture absorbing paper and colour stability was
measured (t0). The samples of each group were
randomly divided into 3 subgroups (n=10) and were
respectively immersed in distilled water, tea and coffee.
At the end of 15 days period, all samples were placed
against a flat white background and to measure colour
stability CIE-L*a*b* system was used. The difference
between the measured colours is calculated (∆E). Results
And Conclusion: within the limits of the study, it showed
that preheating of the composite resin is effective in the
reduction of its colour change and the highest colour
change wasobserved in tea followed by coffee and least
in water.
Keywords :
Composite Resin, Preheating, Colour Stability, Tea and Coffee.
Background: Most important concern in using composite
resins is, colour tends to change in course of time.
Discoloration of these materials compromises the
purpose and success of composite restorations over the
long period. Aim: The aim of this study is to check the
preheating effect of nanohybrid composite resin and its
colour stability when immersed in tea and coffee
solutions. Materials And Methods: This experimental
study included 60 nanohybrid composite disks with a
diameter of 5mm and thickness 2mm. 60 samples were
divided into 2 groups. Group 1 of 30 samples, composite
was placed in refrigerator and placed in plastic moulds
when it comes to room temperature. The samples were
polymerized for 40 seconds from both the sides. In group
2 of 30 samples, a composite gun containing composite
was placed in convection micro-oven and the
temperature was adjusted to 680C, the composite was
immediately inserted in plastic mould and cured from
both the sides. The samples are previously dried with
moisture absorbing paper and colour stability was
measured (t0). The samples of each group were
randomly divided into 3 subgroups (n=10) and were
respectively immersed in distilled water, tea and coffee.
At the end of 15 days period, all samples were placed
against a flat white background and to measure colour
stability CIE-L*a*b* system was used. The difference
between the measured colours is calculated (∆E). Results
And Conclusion: within the limits of the study, it showed
that preheating of the composite resin is effective in the
reduction of its colour change and the highest colour
change wasobserved in tea followed by coffee and least
in water.
Keywords :
Composite Resin, Preheating, Colour Stability, Tea and Coffee.
