Preparation and characterisation of poly p-phenylene-2,6-benzobisoxazole fibre-reinforced resin matrix composite for endodontic post material: A preliminary study

Hu, Chen; Wang, Feng; Yang, Huiyong; Ai, Jun; Wang, Linlin; Jing, Dongdong; Shao, Longquan; Zhou, Xingui

doi:10.1016/j.jdent.2014.10.007

Cited by 8 publications

(10 citation statements)

References 27 publications

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“…The flexural properties of Kevlar posts obtained were between glass and polyethylene, however, the high performance of the Kevlar fibers with respect to high tensile strength and modulus was not fully utilized because of the surface inertness 23) . Hu et al recently reported the feasibility of applying a high-performance fiber, poly p-phenylene-2,6-benzobisoxazole (PBO), in FRCs as a new option to develop posts with improved flexural strength using a combination of coupling agent and argon plasma methods to treat the fibers 24) . Hence employing Kevlar fibers for FRC posts required that the interfacial adhesion between the matrix and fibers be enhanced and the yellow coloration was offset to provide adequate aesthetics for a post.…”

Section: Discussionmentioning

confidence: 99%

Semi-interpenetrating network composites reinforced with Kevlar fibers for dental post fabrication

et al. 2019

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This study evaluates the reinforcement of semi-interpenetrating network composites of 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropyl)phenyl] propane (Bis-GMA)/ triethyleneglycol dimethacrylate (TEGDMA)/polymethyl methacrylate (PMMA) and 25% titanium dioxide (TiO2) nanofiller with surface treated Kevlar fibers for potential application as dental posts. The post material was subjected to thermo-cycling and flexural strength determined, characterised by dynamic mechanical analysis, water sorption, radiopacity and cytotoxicity tests. The results were compared with everStick ® POST. Kevlar pre-treatment with acetic acid and silane coupling agent demonstrated a clear effect on the flexural strength of the composites with a significant increase compared to composites with fibers without surface treatment. The inclusion of TiO2 into the final formulation provided the desired radiopacity and improved both aesthetics and flexural strength, which exhibits a higher resistance on thermocycling. The ratios of fatigue limit to static flexural strength were about 0.73 for Kevlar and 0.58 for everStick ® POST; MTT assay confirmed the absence of any toxic eluents, indicating its feasibility as new intracanal post material.

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Section: Discussionmentioning

confidence: 99%

Semi-interpenetrating network composites reinforced with Kevlar fibers for dental post fabrication

et al. 2019

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“…The growing deviation of the composition dependence of the elastic modulus relative to that of the neat matrix from linearity is caused by fiber misalignment, bundling and mechanical length degradation all increasing with v F [4,5,47,48]. The low reinforcing efficiency of the PBO fibers is caused by their weak interfacial adhesion to PMMA as previously reported problematic issue for these fibers [49][50][51][52], extensive fiber bending compromising their unidirectional alignment in tensile direction and local plastic deformation expressed by the presence of the kink bands (Figure 1f) decreasing PBO effective fiber length significantly.…”

Section: Mechanical Propertiesmentioning

confidence: 78%

“…To our knowledge, we are not aware of similar results for micro PBO and/or similar fiber types in a polymer matrix. In addition, plastics reinforced with the short PBO fibers are very rare in literature, mainly due to the weak interfacial adhesion, and we have found only limited number of publications dealing with engineering properties of polymer/PBO short fiber composites [43,49,53]. Thus, this work can provide experimental data justifying future research on the short PBO fibers toughened thermoplastic composites.…”

Section: Mechanical Propertiesmentioning

confidence: 83%

Toughening of PMMA by short poly(p-phenylene-2,6-benzobisoxazole) fibers

Zbončák¹,

Jančář²

2018

Express Polym. Lett.

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Abstract. We report on unique enhancement of fracture resistance of poly(methyl methacrylate) (PMMA) using short and low bending modulus poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers. While no significant effect of the PBO fibers on stiffness and strength was observed, the strain at break and fracture energy were enhanced substantially. The in situ observations of damage development during the tensile tests showed that the additional extrinsic toughening mechanisms consists of homogenous distribution of micro-cracking and delocalization of the deformation sites to the whole volume of the sample with micro-cracks bridged by the entangled PBO fiber mesh. Employing unique toughening mechanisms of PBO fiber network in hybrid PMMA/CF/PBO composites containing both carbon (CF) and PBO fibers lead to simultaneous enhancement of stiffness, strength and toughness suitable for wide range of engineering applications.

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“…A previous study found that PBO FRCs exhibited higher fatigue resistance than that of quartz fiber-reinforced composite materials. Thus, it is rational to expect PBO fibers to be promising candidates for high-performance dental materials (Hu et al 2014(Hu et al , 2016.…”

Section: Introductionmentioning

confidence: 99%

“…The most common reinforcing fibers in dentistry are glass or quartz fibers. Their mechanical properties are less than desirable because of their brittle nature, which limits the mechanical properties and thus the scope of clinical application of dental FRCs to some extent (Plotino et al 2007; Hu et al 2014). For example, flexural strength and flexural modulus, the 2 most important mechanical properties of endodontic posts, are typically studied (Hatta et al 2021).…”

Section: Introductionmentioning

confidence: 99%

High-Performance Dental Composites Based on Hierarchical Reinforcements

Lin

Yang

et al. 2022

J Dent Res

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Use of high-performance fibers such as poly(p-phenylene-2,6-benzobisoxazole) (PBO) improves the mechanical properties of dental fiber-reinforced composites (FRCs). However, the surfaces of high-performance fibers are relatively inert, and the interface with the resin matrix is poor. This has become a limitation restricting the performance of PBO FRCs in dentistry. Nanomaterials were introduced onto PBO fibers to construct various hierarchical reinforcements to obtain a dental FRC with higher flexural performance and optimized interface bonding. Four hierarchical reinforcements were constructed: PBO-ZnO nanoparticles (NPs), PBO-ZnO nanowires (NWs), PBO-ZnO NPs–cage silsesquioxane (POSS), and PBO-ZnO NWs-POSS. Performance following this optimized method was evaluated at macroscale and microscale levels, including measurement of the interfacial properties and mechanical properties of FRCs. The physicochemical characteristics of PBO fibers before and after modification were measured to determine the interfacial bonding mechanisms and to verify the connection between the microinterface and macromechanical properties. The cytotoxicity of the preferred PBO FRC was evaluated using the CCK8 assay. In comparison to other designs, the interfacial shear strength (IFSS) of PBO-ZnO NWs-POSS was the highest (29.31 ± 2.40 MPa). The corresponding FRC had the highest flexural strength under a static load (925.0 ± 39.2 MPa), the flexural modulus (39.39 ± 1.41 GPa) was equivalent to that of human dentin, and in vitro cytotoxicity was acceptable. The interfacial bonding mechanisms of PBO-ZnO NWs-POSS resulted from mechanical interlocking, chemical bonds, hydrogen bonds, and van der Waals forces. In summary, the PBO-ZnO NWs-POSS hierarchical reinforcement was introduced in dental FRCs and showed remarkable enhancement of the IFSS and flexural properties. We verified that the PBO-ZnO NWs-POSS hierarchical reinforcement was successful. This PBO FRC may be applied in dentistry as a new option for endodontic posts. Our study provides an interface design strategy for developing high-performance FRCs reinforced with high-performance fibers for dental applications.

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Preparation and characterisation of poly p-phenylene-2,6-benzobisoxazole fibre-reinforced resin matrix composite for endodontic post material: A preliminary study

Cited by 8 publications

References 27 publications

Semi-interpenetrating network composites reinforced with Kevlar fibers for dental post fabrication

Semi-interpenetrating network composites reinforced with Kevlar fibers for dental post fabrication

Toughening of PMMA by short poly(p-phenylene-2,6-benzobisoxazole) fibers

High-Performance Dental Composites Based on Hierarchical Reinforcements

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