PEEK-matrix composites containing different content of natural silica fibers or particulate lithium‑zirconium silicate glass fillers: Coefficient of friction and wear volume measurements

Souza, Júlio C. M.; Correia, Marta S. T.; Oliveira, Miguel Noronha; Silva, Filipe; Henriques, Bruno; Oliveira, Antônio Pedro Novaes de; Gomes, J.R.

doi:10.1016/j.biotri.2020.100147

Cited by 14 publications

(9 citation statements)

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“…However, the mechanical properties of PEEK (i.e., tensile strength of around 90 MPa and elastic modulus at 3 GPa) are not enough for application as a dental implant. The incorporation of reinforcement materials, such as carbon or glass fibers, into PEEK matrix results in enhanced mechanical properties, that can be tailored by balancing their volumetric content, size, and shape 23,26,27 …”

Section: Introductionmentioning

confidence: 99%

“…The incorporation of reinforcement materials, such as carbon or glass fibers, into PEEK matrix results in enhanced mechanical properties, that can be tailored by balancing their volumetric content, size, and shape. 23,26,27 The finite element method (FEM) has been used for the assessment of the stress distribution of dental implants for several clinical situations, materials, and design. [28][29][30] FEM allows the modeling of dental structures with good accuracy, avoiding time-consuming on in vitro or even in vivo assays.…”

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confidence: 99%

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Biomechanical analyses of one‐piece dental implants composed of titanium, zirconia, PEEK, CFR‐PEEK, or GFR‐PEEK: Stresses, strains, and bone remodeling prediction by the finite element method

et al. 2021

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This work aimed to assess the biomechanics, using the finite element method (FEM), of traditional titanium Morse taper (MT) dental implants compared to one-piece implants composed of zirconia, polyetheretherketone (PEEK), carbon fiber-reinforced PEEK (CFR-PEEK), or glass fiber-reinforced PEEK (GFR-PEEK). MT and one-piece dental implants were modeled within a mandibular bone section and loaded on an oblique force using FEM. A MT implant system involving a Ti6Al4V abutment and a cp-Ti grade IV implant was compared to one-piece implants composed of cp-Ti grade IV, zirconia (3Y-TZP), PEEK, CFR-PEEK, or GFR-PEEK. Stress on bone and implants was computed and analyzed while bone remodeling prediction was evaluated considering equivalent strain. In comparison to one-piece implants, the traditional MT implant revealed higher stress peak (112 MPa). The maximum stresses on the onepiece implants reached $80 MPa, regardless their chemical composition. MT implant induced lower bone stimulus, although excessive bone strain was recorded for PEEK implants. Balanced strain levels were noticed for reinforced PEEK implants of which CFR-PEEK one-piece implants showed proper biomechanical behavior. Balanced strain levels might induce bone remodeling at the peri-implant region while maintaining low risks of mechanical failures. However, the strength of the PEEKbased composite materials is still low for long-term clinical performance.biomechanics, dental implants, dental materials, finite elements analysis, implant design 1 | INTRODUCTION Titanium dental implants have been increasingly used to replace missing teeth within a high long-term success rate as reported in literature. [1][2][3][4] Dental implants are often composed of two components: the endosseous implant itself and the abutment. The connection between traditional abutment and endosseous implants can be commonly achieved by screwing the abutment in the inner implant surfaces up to a maximum adequate torque or within a Morse taper (MT) effect, in which an applied preload generates stresses that keep the components attached to each each other. 5,6 At last, a single-or multi-unit prosthesis is cemented and/or screwed over the abutment to replace the coronal dental structure. MT implant systems typically reveal higher mechanical stability due to their connection on contacting surfaces and distribution of stresses to the bone. [5][6][7][8] However, the microgap existing between

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Section: Introductionmentioning

confidence: 99%

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Biomechanical analyses of one‐piece dental implants composed of titanium, zirconia, PEEK, CFR‐PEEK, or GFR‐PEEK: Stresses, strains, and bone remodeling prediction by the finite element method

et al. 2021

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“…In the present study, conditioning of Katana UTML with 10% hydrofluoric acid for 20 seconds increased roughness in 44% in comparison with the control group (without conditioning). However, another study showed that conditioning with 40% hydrofluoric acid for 20 seconds did not change the surface roughness pattern of 3-YTZP Zirconia in comparison with other groups (Souza et al, 2020). Thammajaruk et al (2018) concluded that the chemical treatment of Zirconia with acid solutions has little effect on its surface roughness and bond strength.…”

Section: Discussionmentioning

confidence: 96%

Influence of surface treatment on the shear strength of Ultra Translucent Multi Layered Zirconia Katana

Filho

Franco

Carvalho

et al. 2022

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The aim of this study is to assess how shear strength of Ultra Translucent Multi Layered Zirconia Katana (UTML) is affected by the conditioning with 10% hydrofluoric acid combined with the current surface treatment protocol: air, primer containing 10-MDP, and cement. Samples of UTML Zirconia Katana were machined to measure 5x5x10 units of measurement, attached, and divided into two groups. In the control group, samples were treated with 27 um aluminum oxide blasting at 4 bars, application of Zr primer containing 10-MDP and, finally, cement Panávia V5. In the experimental group, samples were also treated with 10% hydrofluoric acid following blasting and prior to the primer application. The test specimens were submitted to shear mechanical strength test on a universal testing machine EMIC DL2000 (EMIC, São Paulo, Brazil), surface analysis with Scanning Electron Microscope (SEM) (Sputter Coaster Emitech, K450) and surface roughness. Results showed that the bond strength of specimens conditioned with acid was 41% higher (p = 0.031). Student’s t test showed that the samples conditioned with acid were rougher than those without conditioning (p = 0.045). Microscopic analysis showed surface alterations on samples conditioned with acid. It is possible to conclude that the group conditioned with hydrofluoric acid showed better adhesive behavior.

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“…In materials science, contemporary CAD/CAM blocks are categorized into three groups, namely metal-based (e.g., titanium alloy [ 4 ] and Co-Cr alloy [ 5 ]), ceramic-based (e.g., feldspathic porcelain [ 6 ], lithium disilicate glass [ 7 ] and zirconia [ 8 ]), or resin-based (e.g., acrylic resin [ 9 ] and resin composite (hereafter composite) [ 10 ]). An investigation of new composites already in use (e.g., poly(ether-ether-ketone) (PEEK) [ 11 ]) and some interesting research on new materials with hierarchized geometry [ 12 ] and biomechanical problems [ 13 , 14 , 15 ] (i.e., bruxism) have also been conducted thus far.…”

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confidence: 99%

PICN Nanocomposite as Dental CAD/CAM Block Comparable to Human Tooth in Terms of Hardness and Flexural Modulus

et al. 2021

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Polymer infiltrated ceramic network (PICN) composites are an increasingly popular dental restorative material that offer mechanical biocompatibility with human enamel. This study aimed to develop a novel PICN composite as a computer-aided design and computer-aided manufacturing (CAD/CAM) block for dental applications. Several PICN composites were prepared under varying conditions via the sintering of a green body prepared from a silica-containing precursor solution, followed by resin infiltration. The flexural strength of the PICN composite block (107.8–153.7 MPa) was similar to a commercial resin-based composite, while the Vickers hardness (204.8–299.2) and flexural modulus (13.0–22.2 GPa) were similar to human enamel and dentin, respectively. The shear bond strength and surface free energy of the composite were higher than those of the commercial resin composites. Scanning electron microscopy and energy dispersive X-ray spectroscopic analysis revealed that the microstructure of the composite consisted of a nanosized silica skeleton and infiltrated resin. The PICN nanocomposite block was successfully used to fabricate a dental crown and core via the CAD/CAM milling process.

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PEEK-matrix composites containing different content of natural silica fibers or particulate lithium‑zirconium silicate glass fillers: Coefficient of friction and wear volume measurements

Cited by 14 publications

References 44 publications

Biomechanical analyses of one‐piece dental implants composed of titanium, zirconia, PEEK, CFR‐PEEK, or GFR‐PEEK: Stresses, strains, and bone remodeling prediction by the finite element method

Biomechanical analyses of one‐piece dental implants composed of titanium, zirconia, PEEK, CFR‐PEEK, or GFR‐PEEK: Stresses, strains, and bone remodeling prediction by the finite element method

Influence of surface treatment on the shear strength of Ultra Translucent Multi Layered Zirconia Katana

PICN Nanocomposite as Dental CAD/CAM Block Comparable to Human Tooth in Terms of Hardness and Flexural Modulus

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