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Get Price2020-3-1 · The cutting of tooth enamel using a high-speed air-turbine handpiece and carbide bur is a key procedure in oral surgeries, such as the minimally invasive extraction. However, presently little is known about the cutting mechanics and material removal mechanism related to tooth enamel machinability. In this study, the machinability of high-speed ...
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Get Price100pks Dental Diamond Burs 45 000rpm Cone Flat Head for High Speed Handpiece US. £2.58 New. 20box Dental Interproximal Enamel Set High Speed Diamond Burs Polishing AZDENT. £0.99 New. 50pcs/bag Drill Dental Polishing SF Series FG High Speed Burs for Dentistry Lab. £6.72 New. UK 100pcs AZDENT Dental FG Diamond Burs Kit Fg-105 Ceramics ...
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Get Price2016-9-1 · The most important aspect of the enamel-dentin complex is the interface, or transition region , between the two, called the dentin-enamel junction (DEJ), which is estimated to be anywhere from 10–100 μm thick , though Gallagher et al. used a combination of nano-indentation and Raman micro-spectroscopy to estimate the thickness as less than ...
Get Price2017-1-1 · Enamel, typical of many ceramics, is a very brittle material, possessing high elastic modulus (∼70–110 GPa) but relatively low tensile strength (10–70 MPa) and fracture toughness (0.7–2.1 MPa m 1/2) (Arola et al., 2010).Dentin, in contrast, has a much lower elastic modulus (∼20 GPa) than enamel, but has higher tensile strength (60–100 MPa) and is more fracture resistant (1.5–2.1 ...
Get Price2017-5-1 · The mechanism of engineering mineralized enamel-like biomaterial represents a novel achievement in regenerative dentistry for repairing hard dental structures like enamel in what is known as “filling without drilling” approach. 101 Anionic β-sheet-forming peptides were found able to form three-dimensional fibrillar scaffolds when applied ...
Get Price2016-9-1 · The most important aspect of the enamel-dentin complex is the interface, or transition region , between the two, called the dentin-enamel junction (DEJ), which is estimated to be anywhere from 10–100 μm thick , though Gallagher et al. used a combination of nano-indentation and Raman micro-spectroscopy to estimate the thickness as less than ...
Get PriceDental erosion due to chemical effect and the effect of oral environments has also been considered. In addition to these, overview of wear modes and wear locations has also been covered. According to results obtained by the authors and from the literature, the main progress in the area of dental tribology on natural dental enamel is reviewed ...
Get Price2020-7-3 · Enamel thickness varies from 2.5 mm at the cusp region to a knife edge at the cementoenamel junction; the dentin thickness is about 10 mm, the cementum thickness varies between 50 µm at the cervical area of the root portion to 150 µm at root apex, the mean volume of a single adult human dental pulp is 0.02 cc, the PDL space varies between 0 ...
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Get Price2018-6-11 · 52. General, bonding to dentin is more challenging than to enamel, because of the complex and hydrated structure of dentin Dentin is a complex composite material with less than 50 vol% inorganic material, and with high water content (21 vol%). 53. The smear layer is revealed by scanning electron microscopy (SEM) as a 1- to 2-mm layer of debris ...
Get PriceAn intelligent dental handpiece control system is disclosed. The handpiece includes a sensor which detects a vibration, sound, force or torque frequency/time signal produced by the handpiece in use and signal processor which produces or determines secondary signal characteristics such as the handpiece torque, force or angular velocity. A controller analyzes the secondary signal characteristics ...
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Get PriceResults. Statistically significant differences of the mechanical properties were found following the various treatments. Burnt sample had the highest elastic modulus and hardness of ∼115 and ∼6. GPa, respectively, while the re-hydrated sample showed the lowest values of ∼95 and ∼4 GPa.. The creep deformation showed the inverse response to the environment-induced elastic modulus results ...
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Get Price2020-9-12 · Abstract. When a solid is irradiated with an intense pulse of femtosecond laser radiation, it experiences a wide range of electronic, thermal, and thermomechanical processes that may modify the stability of the phases existing in the material, produce large concentrations of crystal defects, and generate variations of temperature and pressure that may lead to phase transformations.
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Get Price2021-3-6 · The enamel covers dentin in the tooth crown, the part of the tooth visible in the mouth [50,51,54]. Dentin and enamel are characterized by Knoop microhardness values of approximatively 30–70 and 200–350 KHN, respectively [55,56], the latter being the hardest tissue in the human body.
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Get Price2021-6-3 · WEAR, 257(3-4), 368-376. Marshall MB, Lewis R, Drinkwater BW & Dwyer-Joyce RS (2004) An ultrasonic approach for contact stress mapping in machine joints and concentrated contacts. J STRAIN ANAL ENG, 39(4), 339-350. View this article in WRRO; James DM, Carré MJ & Haake SJ (2004) The playing performance of county cricket pitches.
Get PriceMaterials is a peer-reviewed, open access journal of materials science and engineering published semimonthly online by MDPI.The Portuguese Materials Society (SPM), Spanish Materials Society (SOCIEMAT) and Manufacturing Engineering Society (MES) are affiliated with Materials and their members receive a discount on the article processing charges.. Open Access — free for readers, with …
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Get Price2021-3-6 · Strategies for cell cocultures to replicate developmental processes. 2D cocultures are based on (A) direct and (B) indirect cocultures. Indirect cocultures can be performed by transwell culture systems (left) or by culturing a cell population with a conditioned medium used to previously culture the other cell population (right). 3D cocultures can be based on (C) scaffold-free approaches, such ...
Get Price2020-1-3 · Superparamagnetic nanoparticles (NPs) have a prominent interest from researchers in the field of industrial and biomedical applications. Herein, Mg2+-substituted Mn–Zn ferrites with nominal composition Mn0.5Zn0.5−xMgxFe2O4 NPs (x = 0, 0.125, 0.25, 0.375, and 0.5) are synthesized via a facile sol–gel method. The samples after sintered at 1173 K are characterized via the X-ray diffraction ...
Get Price2019-11-14 · In the enamel-covered dentin area, the IR signal, Fig. 4(j), has higher SNR compared to the IR signal of the pure enamel region, Fig. 4(i), because of the smaller thermal diffusivity of dentin ...
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Get Price4.4 Micro-/Nano-Electromechanical Systems. A high surface-area-to-volume ratio extends the lifetime of MEMS/NEMS devices as adhesion and friction are reduced. Silicon is commonly utilized in MEMS/NEMS but experiences high friction and wear during sliding contact owing to the formation of an oxide layer.
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