Abrasive Processes

Marinescu, Ioan D.; Rowe, Brian; Yin, Ling; Wobker, H.-G.

doi:10.1016/b978-1-4557-7858-4.00003-0

Cited by 7 publications

(6 citation statements)

References 12 publications

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“…To further roughen the surface of an implant, titanium dioxide particles of 25–50 μm are often projected toward the implant surface at a high velocity [ 51 ]. The roughened surface of grit-blasted implants results in higher success rates compared to machined implants [ 50 ].…”

Section: Titanium Implantsmentioning

confidence: 99%

The Impact of Dental Implant Surface Modifications on Osseointegration and Biofilm Formation

Kligman

Ren

Chung

et al. 2021

JCM

166

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Implant surface design has evolved to meet oral rehabilitation challenges in both healthy and compromised bone. For example, to conquer the most common dental implant-related complications, peri-implantitis, and subsequent implant loss, implant surfaces have been modified to introduce desired properties to a dental implant and thus increase the implant success rate and expand their indications. Until now, a diversity of implant surface modifications, including different physical, chemical, and biological techniques, have been applied to a broad range of materials, such as titanium, zirconia, and polyether ether ketone, to achieve these goals. Ideal modifications enhance the interaction between the implant’s surface and its surrounding bone which will facilitate osseointegration while minimizing the bacterial colonization to reduce the risk of biofilm formation. This review article aims to comprehensively discuss currently available implant surface modifications commonly used in implantology in terms of their impact on osseointegration and biofilm formation, which is critical for clinicians to choose the most suitable materials to improve the success and survival of implantation.

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Section: Titanium Implantsmentioning

confidence: 99%

The Impact of Dental Implant Surface Modifications on Osseointegration and Biofilm Formation

Kligman

Ren

Chung

et al. 2021

JCM

166

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“…and magnetic properties (permeability, retentivity or magnetic hysteresis, coercive force, and reluctance), the ceramics are used extensively in electronic/optical devices as well as being applied as high-quality films to base substrates [5]. Simultaneously, they are also considered challenging materials as a result of their brittle nature, creep resistance, and higher hardness [6][7][8][9]. They can be classified as hard to machine materials by conventional processing processes, namely lathe, milling, etc.…”

Section: Introductionmentioning

confidence: 99%

Precise Drilling of Holes in Alumina Ceramic (Al2O3) by Rotary Ultrasonic Drilling and its Parameter Optimization using MOGA-II

Alkhalefah

2020

Materials

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Alumina is an advanced ceramic with applications in dental and medical sciences. Since ceramics are hard and brittle, their conventional machining is expensive, arduous, and time-consuming. As rotary ultrasonic machining is among the most adequate and proficient processing techniques for brittle materials like ceramics. Therefore, in this study, rotary ultrasonic drilling (RUD) has been utilized to drill holes on alumina ceramic (Al2O3). This study investigates the effect of key RUD process variables, namely vibration frequency, vibration amplitude, spindle speed, and feed rate on the dimensional accuracy of the drilled holes. A four-variable three-level central composite design (thirty experiments on three sample plates) is utilized to examine the comparative significance of different RUD process variables. The multi-objective genetic algorithm is employed to determine the optimal parametric conditions. The findings revealed that material removal rates depend on feed rate, while the cylindricity of the holes is mostly controlled by the speed and feed rate of the spindles. The optimal parametric combination attained for drilling quality holes is speed = 4000 rpm, feed rate = 1.5 (mm/min), amplitude = 20 (µm), and frequency = 23 (kHz). The validation tests were also conducted to confirm the quality of drilled holes at the optimized process parameters.

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“…17 In the past decades, HSG has been developed as a finishing process in order to avoid the grinding-induced damage layer on the ceramics. 18 In order to avoid brittle fracture in grinding of ceramics, the wheel velocities were increased, leading to an improvement in ground surface quality when grinding was conducted within the region where ductile flow was prevalent. 18 Kovach and Malkin 19 clearly demonstrated that HSG of advanced ceramics can result in an improved surface finish.…”

Section: Introductionmentioning

confidence: 99%

“…18 In order to avoid brittle fracture in grinding of ceramics, the wheel velocities were increased, leading to an improvement in ground surface quality when grinding was conducted within the region where ductile flow was prevalent. 18 Kovach and Malkin 19 clearly demonstrated that HSG of advanced ceramics can result in an improved surface finish. Their results also showed a transition from a brittle fracture mode to a low damage ductile grinding mode could be achieved when the wheel speed elevated.…”

Section: Introductionmentioning

confidence: 99%

A critical energy model for brittle–ductile transition in grinding considering wheel speed and chip thickness effects

Liang

2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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The ability to predict the critical depth for ductile-mode grinding of brittle materials is important to grinding process optimization and quality control. The traditional models for predicting the critical depth are mainly concerned with the material properties without considering the operation parameters. This article presents a new critical energy model for brittle–ductile transition by considering the strain rate effect brought by the grinding wheel speed and chip thickness. The experiments will be conducted through a high-speed diamond grinder on reaction-sintered silicon carbide materials under different grinding speed and chip thickness. Through detailed analysis of the strain rate effect on the dynamic fracture toughness, a new fracture toughness model will be established based on the Johnson–Holmquist material model (JH-2) and calibrated through experiments based on the indentation fracture mechanics. Then, the new critical model for brittle–ductile transition will be established by introducing the dynamic facture toughness model considering the wheel speed and chip thickness. According to scanning electron microscope observations, the results show that ductile-mode grinding can be obtained through a combination of higher grinding speed and smaller chip thickness. Moreover, the critical value for ductile grinding of brittle materials can be improved through the elevation of the grinding speed or reduction in the chip thickness.

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Abrasive Processes

Cited by 7 publications

References 12 publications

The Impact of Dental Implant Surface Modifications on Osseointegration and Biofilm Formation

The Impact of Dental Implant Surface Modifications on Osseointegration and Biofilm Formation

Precise Drilling of Holes in Alumina Ceramic (Al2O3) by Rotary Ultrasonic Drilling and its Parameter Optimization using MOGA-II

A critical energy model for brittle–ductile transition in grinding considering wheel speed and chip thickness effects

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