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Best practices for Cybersecurity of top-priority infrastructure across USA

Author:

Dr. Ameen M. Muhammed, Dr. Vinay Chandra R., Dr. Geeta, I.B., Dr. Thokala Dhamodaran and Dr. Sachin Sha, S.

Subject Area:

Physical Sciences and Engineering

Abstract:

Objective: The aim of this study is to measure and compare the compressive strength and micro hardness of Bulk-fill composite-light cure (Ivoclar vivadent)) with Cention-N-dual cure (Ivoclar vivadent) Material and methods: In this in vitro study, two different types of bulk-fill composites are used: Group 1: Bulk-fill composite (Ivoclar vivadent)-light activated (blue phase). Group 2-Cention-N (Ivoclar vivadent)-light activated (blue phase). Group 3-Cention-N (Ivoclar vivadent)-self cured. Ten samples of 4 mm height and 6 mm diameter in each group were made using a mold. The composites filled in the mold were photo polymerized using light-emitting diode (LED) light-curing unit for 20 seconds from top for group1 and group2.Specimens in Group 3 were kept for 4 minute for self curing. The compressive strength of the samples were tested on top surface using universal testing machine (Instron 3366, UK) at a cross-head speed of 1.0 mm/minute. The micro hardness value of each sample will be evaluated using Vicker’s micro hardness tester on top .Micro indentation was carried out using a 100 mN load with a 15 seconds dwell time. Then the data will be collected, tabulated and subjected to statistical analysis. Result: In this study we found that compressive strength of the Cention-N (270) (Light-cure) > Cention-N (215) (Self-cure) > Bulk-fill (129). Microhardness values of Cention-N (147) (Light-cure) > Bulk-fill (112) > Cention-N (82) (Self-cure). CONCLUSION: In this study Cention-N (Light-cure) had the highest compressive strength and microhardness. Cention-N (Self-cure) had more compressive strength than Bulk-Fill ,but had lowest microhardness. Bulk-Fill composite had the lowest compressive strength, they had micro hardness more than Cention-N (Self-cure). Cention-N also has anticariogenic activity, it prevents the secondary caries formation of the restored tooth. The future of restorative dentistry appears to be smarter and faster in the coming years with the advent of Cention-N.

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