Objective The purpose of this study was to fabricate bisphenol-a glycidyl methacrylate /tri-ethylene glycol dimethacrylate (TEGDMA)-based nano and micro-sized-filled dental composite and to study the effect of varying silane-treated nano hydroxyapatite on physical, mechanical and thermal properties. Methods The dental resin matrix was fabricated by bisphenol-a glycidyl (53 wt.%), TEGDMA (46 wt.%), camphorquinone (0.3 wt.%) and 2-(dimethylamino) ethyl methacrylate (0.7 wt.%). Silane-treated nano hydroxyapatite (nHA) filler content was varied from 0 to 8 wt.%, while zinc oxide (microsized) remains constant with 20 wt.%. A light curing unit was employed for polymerization of the resinous dental mixture. Results The result revealed that infrared spectra of untreated and treated nHA filler particles were confirmed by Fourier transform infrared spectroscopy. The dental composite filled with 6 wt.% nHA (DHZ6) exhibited maximum compressive strength (249 MPa) and Vickers hardness (49 Hv), while dental composite filled with 8 wt.% nHA (DHZ8) showed minimum depth of cure (5.12 mm), degree of conversion (54%) and polymerization shrinkage (1.12%). Significance Silane treatment of nano hydroxyapatite has a significant role in physical, mechanical, and thermal properties. Bonding strength of coupling agent has been seen between organic and inorganic materials.
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.
The purpose of this paper is to investigate the optimal selection of a variety of dental composites using a hybrid analytic hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS) technique as a multi criteria decision-making (MCDM) technique under a set of conflict Performance Defining Criteria (PDCs). The resinous matrix of the dental composite was fabricated by Bis-GMA (51 wt%), TEGDMA (48 wt%), CQ (0.2 wt%), and EDMAB (0.8 wt%). Five dental composite compositions were created utilizing hybrid nTiO 2 -Al 2 O 3 particles with varying nTiO 2 content (0, 2, 4, 6, 8 wt %). According to AHP, the following PDCs are listed in order: Cost (PDC-13) > Vickers hardness (PDC-4) > compressive strength (PDC-1) > depth of cure (PDC-5) > flexural modulus (PDC-3) > flexural strength (PDC-2) > degree of conversion (PDC-11) > material stability (PDC-12) > void content (PDC-8) > water sorption (PDC-9) > Density (PDC-7) (PDC-6). According to TOPSIS, the following are the rankings: nT2 > nT0 > nT4 > nT6 > nT8. The experimental results are connected to the ranking of several sets of dental formulations. As a result, the AHP-TOPSIS method is one of the finest MCDM strategies for ranking under diverse PDCs.
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