Mechanical and two‐body wear characterization of micro‐nano ceramic particulate reinforced dental restorative composite materials
Ramkumar Yadav, Anoj Meena
Abstract
Abstract The purpose of the investigation is to develop resin‐based dental restorative composite material reinforced with marble dust powder (MDP)‐silane coated nano‐hydroxyapatite (nHA) and study the effect on different characterizations. Five different compositions were prepared by mixing weight percentages (0, 2, 4, 6, and 8 wt%) of silane treated nHA. The amount of MDP (20 wt%) remained constant for all five dental compositions. The fabricated dental composite samples were cured using a curing LED light for 30 s on each side. The mechanical properties result revealed that incorporating 8 wt% nHA dental composite exhibited maximum hardness, compressive, and flexural strength. An increasing trend has been observed in water sorption and water solubility while decreasing in degree of conversion and depth of cure. The specific wear rate was 27.57% decreased for varying load, 57.10% increased for varying sliding speed, and 66.89% increased for varying sliding time. Taguchi analysis represents the dental composite incorporated with 6 wt% nano‐hydroxyapatite at a normal load 70 N, sliding velocity 130 rpm, and at time 23 min exhibits minimum wear rate. ANOVA analysis indicates that the load factor shows a considerable effect on the specific wear rate.