Testing and characterization of sintered β-tricalcium phosphate coat upon zirconia dental implant using Nd:YAG laser

Abstract

This study aims to fabricate and assess the β-tricalcium phosphate (β-TCP) bioactive ceramic coat layer on bioinert ceramic zirconia implants through the direct laser melting technique by applying a long-pulsed Nd:YAG laser of 1064 nm. Surface morphologies, adherence, and structural change in the coatings were evaluated by optical microscopy, field emission scanning electron microscope, hardness, and x-ray diffractometer. The elastic modulus (EM) of the coating was also determined using the nanoindentation test. The quality of the coating was improved when the laser power was 90 W with a decrease in the scan speed to 4 mm s−1. The chemical composition of the coat was maintained after laser processing; also, the Energy Dispersive X-ray maps showed a good distribution of Ca and P particles with some agglomeration on the surface. The crystalline nature of the β-TCPs coat can be concluded from the sharp peaks in the x-ray diffraction patterns. EM was low near the top surface of the coat and increased gradually with the depth. The microhardness value of a coated substrate was lower than the hardness value of a control substrate. Unlike conventional deposition techniques, laser processes can be used to build a coat with optimum bonding and desirable mechanical properties, indicating that processing and coating seem to be attractive for bioinert ceramic zirconia implants.

Preparing polycaprolactone scaffolds using electrospinning technique for construction of artificial periodontal ligament tissue

“…The 3D artificial construct (cylindrical scaffold and seeded cells) has potential clinical applications in the covering of dental implants and production of biohybrid implants. Further vivo studies could aim to cover dental implants (titanium or zirconia) with sintered β-TCP 40 , 41 in order to simulate natural periodontal tissues.…”

Assessment of Coating Zirconium Implant Material with Nanoparticles of Faujasite

“…To prepare zirconia samples, fractional sintered zirconia block disc was cut according to the selected measurements utilizing a dental computerized three-axis milling system, computeraided design /computer-aided manufacturing (CAD/CAM) imes-icore, Germany), substrates sintered in sintering heater of imes-icore up to 1650 C, according to manufacture instruction. Then, substrates were cleaned ultrasonically in ethanol for half an hour and then put aside in the air before coating (8) . polyvinylpyrrolidone (PVP) (MW: 40,000) was produced by alpha chemical (made in India), PVP, and distilled water was considered as a solvent for the faujasite manufactured by China with a particle size of about 286.7 as shown in the figure (2) and measurements of parameters device mentioned in table (1).…”

Effects of Long Durations of RF–Magnetron Sputtering Deposition of Hydroxyapatite on Titanium Dental Implants

“…1). Thickness was calculated at six different target-to-substrate distances (20,30,40,50,60, and 70 mm) for each specific magnetron power that was used. The optimum sputtering parameters were identified by measuring coat thickness on a square quartz microscope slide (25.4 mm × 25.4 mm × 1 mm thick; Ted Pella, Inc., United States) using a laser ellipsometer (SE 800, Sentech, Germany).…”

“…23 The discs were molded vertically, and the yielded blocks were ground using a 400 grit SiC paper and then finished and polished with a 2,000 grit SiC paper to expose the substratecoat area. 20,24 Coating thickness and surface morphology were investigated via field emission scanning electron microscopy (FESEM) (MIRA3 Tescan, Czech Republic). SEM-energy dispersive X-ray (EDX) analysis was conducted for elemental analysis.…”

“…After etching, the specimens were rinsed with acetone for coating. 20,21 A custom-made stainless steel plat holder was designed to hold the circular substrates and fix the rod substrates (root form) vertically in the vacuum chamber during sputtering to ensure uniform coating.…”