A novel technique for preparing dental CAD/CAM composite resin blocks using the filler press and monomer infiltration method

Okada, Koichi; Kameya, Takehiro; Ishino, Hiroshige; Hayakawa, Tohru

doi:10.4012/dmj.2013-329

Cited by 35 publications

(30 citation statements)

References 23 publications

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“…However, those scaffolds could function as 3-dimensional network preforms for polymer infiltration and preparation of double-network composite blocks for CAD-CAM. Polymer-based composites with interpenetrating phases, which are characterized by porous 3-dimensional ceramic scaffolds infiltrated by a polymer matrix, have recently drawn attention in the literature and shown promising results (He and Swain 2011;Coldea et al 2013;Nguyen et al 2013;Coldea et al 2014;Della Bona et al 2014;Nguyen et al 2014;Okada et al 2014;Coldea et al 2015). However, the use of crystalline nonsilicate particles has not yet been tested for the development of such materials.…”

Section: Resultsmentioning

confidence: 99%

Silica Coating of Nonsilicate Nanoparticles for Resin-Based Composite Materials

et al. 2016

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A supplemental appendix to this article is published electronically only at http://jdr.sagepub.com/supplemental. AbstractThis study was designed to develop and characterize a silica-coating method for crystalline nonsilicate ceramic nanoparticles (Al 2 O 3 , TiO 2 , and ZrO 2 ). The hypothesis was that the coated nonsilicate nanoparticles would stably reinforce a polymeric matrix due to effective silanation. Silica coating was applied via a sol-gel method, with tetraethyl orthosilicate as a silica precursor, followed by heat treatment. The chemical and microstructural characteristics of the nanopowders were evaluated before and after silica coating through x-ray diffraction, BET (Brunauer-Emmett-Teller), energy-dispersive x-ray spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy analyses. Coated and noncoated nanoparticles were silanated before preparation of hybrid composites, which contained glass microparticles in addition to the nanoparticles. The composites were mechanically tested in 4-point bending mode after aging (10,000 thermal cycles). Results of all chemical and microstructural analyses confirmed the successful obtaining of silica-coated nanoparticles. Two distinct aspects were observed depending on the type of nanoparticle tested: 1) formation of a silica shell on the surface of the particles and 2) nanoparticle clusters embedded into a silica matrix. The aged hybrid composites formulated with the coated nanoparticles showed improved flexural strength (10% to 30% higher) and work of fracture (35% to 40% higher) as compared with composites formulated with noncoated nanoparticles. The tested hypothesis was confirmed: silanated silica-coated nonsilicate nanoparticles yielded stable reinforcement of dimethacrylate polymeric matrix due to effective silanation. The silica-coating method presented here is a versatile and promising novel strategy for the use of crystalline nonsilicate ceramics as a reinforcing phase of polymeric composite biomaterials.

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Section: Resultsmentioning

confidence: 99%

Silica Coating of Nonsilicate Nanoparticles for Resin-Based Composite Materials

et al. 2016

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“…2L). On the other hand, when the material consists of homogeneous nano-filers, such as the Katana Avencia block material using the filler press and monomer infiltration method 20) , the abrasion will occur in a more uniform way, resulting in a higher gloss (Table 3 and Fig. 2H).…”

Section: Discussionmentioning

confidence: 99%

Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

Koizumi

Saiki

Nogawa

et al. 2015

Dental Materials Journal

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The purpose of this study was to evaluate the gloss and surface roughness behaviors of newly developed CAD/CAM composite blocks with different filler contents and characteristics. The gloss and surface roughness were quantified before and after a toothbrush dentifrice abrasion test; the results were compared to the gloss and surface roughness of a ceramic CAD/CAM block. Knoop hardness was determined before abrasion test. The results were analyzed by ANOVA, Tukey HSD, and Dunnett t test (p<0.05). The rank order of Knoop hardness was as follows: Vita Mark II>Vita Enamic>Gradia block>Shofu Block HC, Lava Ultimate≥Katana Avencia block≥Cerasmart. After toothbrush abrasion, a significant difference in the gloss unit was detected between the Shofu Block HC material and the ceramic block. The Ra and Rz of the Cerasmart and Shofu Block HC materials were significantly larger than those of the ceramic block after toothbrush abrasion.

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“…The KATANA AVENCIA blocks used in the present study are made with a relatively new approach 26) . Therefore, findings related to this block may not be valid for resin blocks produced by other companies and additional investigations are needed to clarify the external validity of the present study.…”

Section: Discussionmentioning

confidence: 99%

Bonding effectiveness of self-adhesive and conventional-type adhesive resin cements to CAD/CAM resin blocks. Part 2: Effect of ultrasonic and acid cleaning

et al. 2016

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The present study assessed the effect of ultrasonic and acid cleaning on resin cement bonding to CAD/CAM resin blocks. One of two resin cements, PANAVIA V5 (PV5) or PANAVIA SA CEMENT HANDMIX (PSA), were bonded to one of 24 CAD/CAM blocks (KATANA AVENCIA BLOCK). Each cement group was divided into four subgroups: no cleaning (Ctl), ultrasonic cleaning (Uc), acid cleaning (Ac) and Uc+Ac. Micro-tensile bond strengths (µTBSs) were measured immediately and 1, 3, and 6 months after water storage. Block surfaces after each treatment were analyzed by scanning electron microscopy. Analysis of variance revealed a statistically significant effect for the parameters 'surface treatment' (p<0.001, F=40), 'resin cement' (p<0.001, F=696) and 'water aging' (p<0.001, F=71). The PV5 group exhibited higher µTBS values than the PSA group. Although cleaning after sandblasting was effective in removing residual alumina particles, it did not affect the long-term bonding durability with non-contaminated CAD/CAM resin blocks.

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A novel technique for preparing dental CAD/CAM composite resin blocks using the filler press and monomer infiltration method

Cited by 35 publications

References 23 publications

Silica Coating of Nonsilicate Nanoparticles for Resin-Based Composite Materials

Silica Coating of Nonsilicate Nanoparticles for Resin-Based Composite Materials

Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

Bonding effectiveness of self-adhesive and conventional-type adhesive resin cements to CAD/CAM resin blocks. Part 2: Effect of ultrasonic and acid cleaning

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