الفهرس 
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Abstract
Background: Complete dentures are still one of the most common and effective
treatment options for edentulous patients. Nowadays, conventional heat cured
polymethylmethacrylate (PMMA) denture bases are replaced by digitally fabricated
ones either by subtractive or additive manufacturing techniques. The mechanical and
surface properties of 3D printed denture bases can be modified by incorporating
fillers of different percentages to obtain properties comparable to those of heat cured
denture bases.
Aim of the study: The aim of this study is to evaluate the 3D printed denture base
resin modified by nano-glass particles and carbon nanotubes regarding some
important mechanical and surface properties.
Plan of the study: 3D printed denture base resin will be modified using nano-glass
particles and carbon nanotubes (CNTs). Both nano-glass particles and CNTs will be
surface treated. The nano-glass particles will be treated using aminopropyl-triethoxy
silane (APTES). CNTs will be functionalized using a mixture of nitric and sulfuric
acid (1:3 by volume) and then silanized using APTES. After that the nano-fillers will
be added to the 3D printed resin according to the following groups. group Ⅰ: with no
nano-fillers (control), group Ⅱ: nano glass particles modified resin with two
subgroups: subgroup ⅡA with 0.25% and subgroup ⅡB with 0.5% nano-glass
particles by weight , group Ⅲ: CNTs modified resin with two subgroups: subgroup
ⅢA with 0.25% and subgroup ⅢB with 0.5% CNTs by weight and group Ⅳ: nanoglass
particles and CNTs modified resin with 0.25% by weight for each filler type.
After that the specimens will be printed using a 3D printer and tested for flexural
strength using a universal testing machine, impact strength using charpy’s impact
tester and surface roughness using a surface profilometer. The specimens will be
also assessed for nano-fillers distribution and fracture pattern by Scanning electron
microscopy.
Analysis: Data will be collected, tabulated, and analyzed using the appropriate
statistical methods.
Keywords: Nano-glass, Carbon nanotubes (CNTs),3D printing, Denture base.