Effect of bur selection on machining damage mechanisms of polymer-infiltrated ceramic network material for CAD/CAM dental restorations

Song, Xiaofei; Kang, Ning; Yin, Ling

doi:10.1016/j.ceramint.2020.06.089

Cited by 6 publications

(5 citation statements)

References 49 publications

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“…The reported hardness, elastic modulus, flexural strength and fracture toughness in literature are very close to those of human enamel and dentine [3,10,[15][16][17][18]. Also, it exhibits lower elastic modulus and hardness than leucite and feldspar glass ceramics, enabling it with higher damage and edge chipping tolerance [2,[19][20][21][22][23]. Further, several studies reveal its superior sliding-contact fatigue fracture resistance [24,25], enamel-like wear properties [26,27] and long-term hydrolytic degradation resistance [9].…”

Section: Introductionmentioning

confidence: 75%

Effect of polymer amount on the mechanical behavior of polymer-infiltrated zirconia-ceramic composite at different pre-sintering temperatures

Alao

Eliza

Rahman

2022

Mater. Res. Express

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Polymer-infiltrated zirconia-ceramic composite (PIZC) comprises a pre-sintered zirconia-ceramic matrix and a polymer. In this work, pre-sintered zirconia-ceramic was infiltrated with varied amounts of methacrylate-based polymer. Therefore, this paper reports the effect of polymer amount on the mechanical behavior of PIZC at 1100–1300 ⁰C pre-sintering temperatures. Conventional mechanical tests were performed to obtain the elastic modulus and fracture toughness while Vickers micro-indentations were employed to extract the Vickers hardness. Advanced mechanical behaviour analysis was characterized by plastic deformation resistance, elastic and plastic deformation components and brittle index. Increasing the amount of polymer from 0 to 42% led to the corresponding decrease in elastic modulus, hardness and fracture toughness by at least 78, 85 and 75%, respectively. As the temperature was increased, both elastic modulus and hardness increased while the fracture toughness initially increased but decreased at higher temperature. Mechanical properties and polymer amount were well modelled by connected-grain models which usefully explained the densification process occurring at higher temperatures. Plastic deformation resistance and component and brittleness index confirmed better plastic properties for PIZC at higher polymer amounts and lower temperature. Therefore, in order to utilize the plastic properties of PIZC during the CAD/CAM process, these findings recommended its processing at not-lower-than 26% polymer amount and 1100 ⁰C, which could greatly facilitate its precision ductile machining mode realization. Finally, the results provide a technical guidance for the selection of appropriate polymer amount when fabricating dental restorations from this novel ceramic-composite.

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Section: Introductionmentioning

confidence: 75%

Effect of polymer amount on the mechanical behavior of polymer-infiltrated zirconia-ceramic composite at different pre-sintering temperatures

Alao

Eliza

Rahman

2022

Mater. Res. Express

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“…PICN's elastic modulus and the hardness resemble to the dental tissues, and fracture resistance is higher compare to CAD/CAM leucite and feldspar glass ceramics [5,12]. Crack propagation in this material is blocked due to low Young's modulus, and the interpenetrating components network behaves like impact-absorbing mechanism [10,20,24].…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

“…Clinical assessment of PICN indirect restorations has been reported as successful for minimally invasive restorations for anterior and posterior crowns (veneers, inlays, onlays) and for implant supported crowns [10]. Some authors found that an extensive tooth preparation will lead to weakened remaining tooth structure causing irreversible failure and other conclude that a thicker restorative material will enhance the fracture resistance of the restoration [37,38].…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

“…Fracture properties are similar for Vita Enamic and IPS e.max CAD [37] and Vita Enamic and Lava Ultimate [32,39], when these materials are used for occlusal onlays respective occlusal veneers 0.6-mm and 1.5 mm thick. Songa [10] reported that fracture toughness and damage resistance of PICN are higher than CAD/CAM https://doi.org/10.37358/MP.21.2.5473 machinable leucite and feldspar glass ceramics.…”

Section: Scanning Electron Microscopymentioning

confidence: 99%

“…The digital design (CAD) of the prosthetic restoration is finalized with a specific software, and using a subtractive process, the milling machine (CAM) will deliver the final restoration in several minutes [6][7][8][9]. Ceramic blocks were the first CAD-CAM materials developed for in office use, showing superior mechanical properties, outstanding esthetic, color stability, and excellent biocompatibility [10,11]. Some of the disadvantages of these ceramics are that they are breakable, difficult to repair and will cause in time natural tooth wear [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Material Thickness Influence on Fracture Load of Polymer Infiltrated Ceramic Network CAD/CAM Restorations

Avram¹,

Goguţă²,

Galatanu³

et al. 2021

Mater. Plast.

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Polymer infiltrated ceramics are hybrid materials that combine the strength of ceramics and the flexibility of polymers. The aim of this study was to compare the fracture load capacity of monolithic CAD/CAM crowns with different occlusal thicknesses, made from polymer infiltrated ceramic network. Fifteen full contour CAD/CAM crowns made of Vita Enamic with occlusal thicknesses of 0.5 mm, 1.0 mm and 1.5 mm were fabricated with a wet milling machine. Restorations were cemented on human molars with adhesive cement. Samples were loaded along the long axis until fracture, with a single static compressive force. A scanning electron microscope (SEM) was used to examine the fracture surface of specimens after the fracture. The results of this study reveals that the fracture load of the samples increased progressively with the occlusal thickness. The highest fracture value was recorded for1.5 mm occlusal thickness of the crown. No statistically significant difference was reported between the three experimental groups. It can be concluded that hybrid monolithic CAD-CAM crowns showed sufficient fracture strength to be used for single restorations in the posterior area, even with a reduced occlusal thickness.

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Optimization of grinding parameters in robotic-assisted preparation of cracked teeth based on fracture mechanics: FEA and experiment

Sun,

Jiang,

et al. 2025

Computer Methods and Programs in Biomedicine

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Effect of bur selection on machining damage mechanisms of polymer-infiltrated ceramic network material for CAD/CAM dental restorations

Cited by 6 publications

References 49 publications

Effect of polymer amount on the mechanical behavior of polymer-infiltrated zirconia-ceramic composite at different pre-sintering temperatures

Effect of polymer amount on the mechanical behavior of polymer-infiltrated zirconia-ceramic composite at different pre-sintering temperatures

Material Thickness Influence on Fracture Load of Polymer Infiltrated Ceramic Network CAD/CAM Restorations

Optimization of grinding parameters in robotic-assisted preparation of cracked teeth based on fracture mechanics: FEA and experiment

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