Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study
Introduction: New generation composite resin materials have revolutionized the art of aesthetic dentistry. The clinical success is dependent on effective polymerisation and surface hardness which in turn are dependent on the performance of Light Curing Units (LCU). This study utilises surface ha...
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doaj-49c3b2f1a2c14306bc63374f421dea392021-01-18T06:36:33ZengJCDR Research and Publications Private LimitedJournal of Clinical and Diagnostic Research2249-782X0973-709X2020-07-01147010610.7860/JCDR/2020/43875.13834Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro StudyAnuradha Vitthal WankhadeSharad Basavraj KamatSantosh Irappa HugarGirish Shankar NanjannawarSumit Balasaheb VhateIntroduction: New generation composite resin materials have revolutionized the art of aesthetic dentistry. The clinical success is dependent on effective polymerisation and surface hardness which in turn are dependent on the performance of Light Curing Units (LCU). This study utilises surface hardness as a measure of degree of polymerisation of composite resins achieved by LCUs. Aim: To evaluate the difference in surface hardness of nanohybrid and microhybrid resin composites cured by light curing systems, Light Emitting Diode (LED) and Quartz Tungsten Halogen (QTH). Materials and Methods: In this invitro experimental study, two types of hybrid composites (Nanohybrid and Microhybrid) were tested for surface hardness by using two different light curing systems (LED and QTH). All the Nanohybrid and Microhybrid specimens were cured using LED and QTH LCUs, thus giving four combinations. A total of 60 specimens (6 mm diameter and 2 mm depth) were prepared using Teflon mould with 15 samples for each combination. Surface hardness was measured on upper and lower surface after 24 hours and hardness ratio was calculated. Data was analysed using independent t-test for intergroup comparison. Level of significance was kept at 5%. Results: Surface hardness of resin composites cured by LED LCU was greater than those cured by QTH LCU. Additionally, the hardness value was greater for the upper surface. Nanohybrids showed better surface hardness than Microhybrids for both the LCUs. Conclusion: Nanohybrid composite resins and LED system were found to be more effective in terms of surface hardness as compared to their counterparts.https://jcdr.net/articles/PDF/13834/43875_CE[Ra1]_F(SHU)_PF1(Kri_KM)_PFA(KM)_PN(SL).pdfdental materialshybrid compositespolymerisationrestorative dentistryvickers hardness test |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Anuradha Vitthal Wankhade Sharad Basavraj Kamat Santosh Irappa Hugar Girish Shankar Nanjannawar Sumit Balasaheb Vhate |
spellingShingle |
Anuradha Vitthal Wankhade Sharad Basavraj Kamat Santosh Irappa Hugar Girish Shankar Nanjannawar Sumit Balasaheb Vhate Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study Journal of Clinical and Diagnostic Research dental materials hybrid composites polymerisation restorative dentistry vickers hardness test |
author_facet |
Anuradha Vitthal Wankhade Sharad Basavraj Kamat Santosh Irappa Hugar Girish Shankar Nanjannawar Sumit Balasaheb Vhate |
author_sort |
Anuradha Vitthal Wankhade |
title |
Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study |
title_short |
Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study |
title_full |
Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study |
title_fullStr |
Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study |
title_full_unstemmed |
Surface Hardness of Nanohybrid and Microhybrid Resin Composites Cured by Light Emitting Diode and Quartz Tungsten Halogen Light Curing Systems: An Invitro Study |
title_sort |
surface hardness of nanohybrid and microhybrid resin composites cured by light emitting diode and quartz tungsten halogen light curing systems: an invitro study |
publisher |
JCDR Research and Publications Private Limited |
series |
Journal of Clinical and Diagnostic Research |
issn |
2249-782X 0973-709X |
publishDate |
2020-07-01 |
description |
Introduction: New generation composite resin materials
have revolutionized the art of aesthetic dentistry. The clinical
success is dependent on effective polymerisation and surface
hardness which in turn are dependent on the performance of
Light Curing Units (LCU). This study utilises surface hardness
as a measure of degree of polymerisation of composite resins
achieved by LCUs.
Aim: To evaluate the difference in surface hardness of
nanohybrid and microhybrid resin composites cured by light
curing systems, Light Emitting Diode (LED) and Quartz Tungsten
Halogen (QTH).
Materials and Methods: In this invitro experimental study, two
types of hybrid composites (Nanohybrid and Microhybrid) were
tested for surface hardness by using two different light curing
systems (LED and QTH). All the Nanohybrid and Microhybrid
specimens were cured using LED and QTH LCUs, thus giving
four combinations. A total of 60 specimens (6 mm diameter and
2 mm depth) were prepared using Teflon mould with 15 samples
for each combination. Surface hardness was measured on
upper and lower surface after 24 hours and hardness ratio was
calculated. Data was analysed using independent t-test for
intergroup comparison. Level of significance was kept at 5%.
Results: Surface hardness of resin composites cured by LED
LCU was greater than those cured by QTH LCU. Additionally, the
hardness value was greater for the upper surface. Nanohybrids
showed better surface hardness than Microhybrids for both
the LCUs.
Conclusion: Nanohybrid composite resins and LED system
were found to be more effective in terms of surface hardness as
compared to their counterparts. |
topic |
dental materials hybrid composites polymerisation restorative dentistry vickers hardness test |
url |
https://jcdr.net/articles/PDF/13834/43875_CE[Ra1]_F(SHU)_PF1(Kri_KM)_PFA(KM)_PN(SL).pdf |
work_keys_str_mv |
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