COMPARATIVE EVALUATION OF THE VICKERS MICRO HARDNESS AND DEPTH OF CURE OF SELECTED DENTAL COMPOSITES - An In vitro study

Dr Anupama S Gopinathan; Dr Jeeva P P; Dr. Vinayakumar T

Volume : VI, Issue : IX, September - 2017

COMPARATIVE EVALUATION OF THE VICKERS MICRO HARDNESS AND DEPTH OF CURE OF SELECTED DENTAL COMPOSITES - An In vitro study

Dr Anupama S Gopinathan, Dr Jeeva P P, Dr. Vinayakumar T

Abstract :

Aims and objectives

The current invitro study evaluated Vickers microhardness (VH) and depth of cure (DC) of selected dental composite resins polymerized with either a commercial halogen LCU or LED, LCU respectively.

Materials and Methods

Five dental composite resins were selected for measuring VH (Spectrum TPH, Filtek ^TMP60, Z₁₀₀, Chitra dual cure, Chitra radioopaque light cure). Four resin composites were investigated for depth of cure measurement. The VH of the surface was determined with a microhardness tester (HMV 2000 SHIMADZU) using a Vickers diamond indenter and a 1kg load applied for 20 sec. Depth of cure was measured using the digimatic calipers.

Results

The results were compared statistically using one way ANOVA for VH. All samples showed statistically significant higher VH values for LED LCU except Z₁₀₀ which exhibited no difference. The mean values were taken into consideration for depth of cure. All samples except Z₁₀₀showed higher mean value for LEDLCU.

Conclusion

In summary VH and DC of samples cured with Halogen LCU and LED LCU exceeded the values required by ISO standards, manufacturers specifications and clinical demands.