Abstract:
:In tissue engineering, biodegradable polymer materials with both high biocompatibility and high strength are very important as scaffolds for long term use. Therefore, in this research, we tried to prepare the three types of poly(L-lactic acid) (PLLA)/calcium phosphate (CP) hybrid composite for a scaffold biomaterial. The effects of addition of different CP on both biocompatibility and mechanical properties were evaluated. CP powders and voids were three-dimensionally and uniformly distributed in the solid samples and porous composite samples. These compositions of CP and PLLA greatly improved the cellular adhesiveness, which increased as the volume fraction of CP in the composite increased. For the porous samples, cells migrated into the pores. This study demonstrated that a composite of PLLA and CP is an effective new scaffold material that results in better osteoconductivity, bone regeneration, and mineralization and has moderately high strength.
journal_name
Dent Mater Jjournal_title
Dental materials journalauthors
Hamada Y,Fujitani W,Kawaguchi N,Daito K,Niido T,Uchinaka A,Mori S,Kojima Y,Manabe M,Nishida K,Arita K,Nakano T,Matsuura Ndoi
10.4012/dmj.2012-117subject
Has Abstractpub_date
2012-01-01 00:00:00pages
1087-96issue
6eissn
0287-4547issn
1881-1361pii
DN/JST.JSTAGE/dmj/2012-117journal_volume
31pub_type
杂志文章abstract::The aim was to evaluate the effect of different zirconia discontinuous fiber fractions on radiopacity and other selected properties of glass discontinuous fiber-reinforced flowable composite (Exp-SFRC). Exp-SFRC was prepared by mixing 30 wt% of resin-matrix and 45 wt% of particulate-fillers to 25 wt% of various weight...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2018-102
更新日期:2019-03-31 00:00:00
abstract::The effect of etching for 90 s with low concentrations (0.5, 1.0, 2.0, 3.0, 3.5, and 4.0%) of hydrofluoric acid (HF) on the adhesiveness of computer-aided design/computer-aided manufacturing (CAD/CAM) resin blocks [CERASMART (CS), SHOFU BLOCK HC (HC), KATANA AVENCIA Block(KA), and VITA ENAMIC (EN)] was investigated. E...
journal_title:Dental materials journal
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doi:10.4012/dmj.2018-398
更新日期:2020-12-03 00:00:00
abstract::This in vitro study aimed to investigate the effects of glass-ionomer and flowable composite liners on the fracture resistance of Class II amalgam and composite restorations. Group 1 cavities were restored with amalgam and Group 4 cavities with nanofill composite after the application of a dentin-bonding agent. For th...
journal_title:Dental materials journal
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doi:10.4012/dmj.2013-053
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abstract::This study aimed to evaluate cyclic fatigue resistance and bending properties and torque/force generation of WaveOne Gold (WOG) Primary in comparison with WaveOne (WO) Primary and Reciproc (RE) R25. A cyclic fatigue test revealed that the WOG Primary took significantly longer time to fracture compared with the WO Prim...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2018-203
更新日期:2019-06-01 00:00:00
abstract::The aim of the present work was to investigate the effect of the different organically modified nanoclays on clinically significant properties of new synthesized dental pit and fissure nanocomposite sealants. Their morphological characteristics were examined by means of X-ray diffraction (XRD) analysis and scanning el...
journal_title:Dental materials journal
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doi:10.4012/dmj.2019-214
更新日期:2020-09-29 00:00:00
abstract::To improve the bioactivity of titanium surfaces, glow discharge was used to facilitate collagen grafting on titanium disks. Titanium test specimens were pre-treated by glow discharge fed with a mixture of argon and allylamine (AA) gases. Treated titanium disks were then grafted with type I collagen using glutaraldehyd...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.27.340
更新日期:2008-05-01 00:00:00
abstract::This study evaluated a new enzyme solution (SFC-V) for dentin caries removal, and obtained results were compared with Carisolv. Both solutions were used with a prototype plastic instrument - this being a modified technique for Carisolv. Five carious deciduous teeth were sectioned, and both treatments were applied alte...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.25.675
更新日期:2006-12-01 00:00:00
abstract::A new tensile fatigue test using a stainless steel screw was introduced. A transparent PMMA rod was selected as the test material. A hole was drilled and tapped into the rod; a screw was put into the rod with dental cement or without cementation. Three types of cyclic loads were applied to the test piece; the number o...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.11.141
更新日期:1992-12-01 00:00:00
abstract::This study investigated the anti-demineralization effects of surface pre-reacted glass-ionomer (S-PRG) filler-containing varnishes. Thirty-five bovine root specimens were divided into five treatment groups, with seven specimens each coated with 1) MI varnish (MIV), 2) F varnish (FV), 3) PRG varnish I (PV), 4) PRG varn...
journal_title:Dental materials journal
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doi:10.4012/dmj.2019-396
更新日期:2020-11-11 00:00:00
abstract::Enamel and dentin particles were added to an experimental 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-based one-step adhesive to react for 30 s. After enamel and dentin reactants were analyzed using X-ray diffraction (XRD) and phosphorus-31 nuclear magnetic resonance ((31)P NMR) techniques, curve-fitting analys...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2014-260
更新日期:2015-01-01 00:00:00
abstract::The purpose of this review is to summarise recent advances in the design and composition of bioactive surface layers of implantabile biomaterials, and thus the genetic potential of osteoprogenitor cells to recognize and respond to these diverse implanted biomaterials. Changes applied to a biomaterial's surface, in gen...
journal_title:Dental materials journal
pub_type: 杂志文章,评审
doi:10.4012/dmj.19.99
更新日期:2000-06-01 00:00:00
abstract::The aim of this study was to compare the shear bond strengths (SBS), failure modes (adhesive, cohesive, or mixed), and marginal microleakage occurrence of conventional resin (CR)-based, glass ionomer (GI)-based, and self-adhesive resin (SAR)-based fissure sealants with or without prior phosphoric acid (PA) etching. Fi...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-227
更新日期:2014-01-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2016-303
更新日期:2017-07-26 00:00:00
abstract::This study tested whether exhaled humid conditions would affect the adhesion of etch-and-rinse, two-step and one-step self-etch adhesive resins to enamel. Enamel surfaces of human maxillary anterior teeth (N=240, n=20) were exposed to four humid conditions (H1: 63-68%, H2: 73-78%, H3: 93-98%, H4: 36-45% RH) during bon...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2012-200
更新日期:2013-01-01 00:00:00
abstract::The aim of this study was to evaluate the trial Teaching Robot for the development of a contact-type measuring apparatus for using directly in the oral cavity. A standard model was used to mimic the dentition by placing an arrangement of three bearing balls. The diameters of the balls were measured. A practical dentit...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.22.168
更新日期:2003-06-01 00:00:00
abstract::The purpose of this study was to clarify the effect of silver nanoparticles on the behavior of subcritical crack growth (SCG) in dental porcelains. Prior to occurrence of fast fracture in dental porcelains, SCG occurs and leads to strength degradation over time. SCG in dental porcelains can be characterized by the str...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2012-266
更新日期:2013-01-01 00:00:00
abstract::The torsional fracture strength at the interface between a base plate and veneering material was evaluated for three kinds of veneered restoration: porcelain fused to zirconia (PFZ), porcelain fused to metal (PFM), and composite resin veneered metal (CRVM). The metal and zirconia base plate (30×4×0.4 mm) were prepared...
journal_title:Dental materials journal
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更新日期:2018-07-29 00:00:00
abstract::The purpose of this study was to devise and propose appropriate conditions for the photographing of thermal images in the oral cavity and to evaluate which thermography techniques can be applied to dentistry by evaluating the differences in temperature among oral tissues. Thermal images of oral cavities of 20 voluntee...
journal_title:Dental materials journal
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doi:10.4012/dmj.22.436
更新日期:2003-12-01 00:00:00
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journal_title:Dental materials journal
pub_type: 杂志文章
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更新日期:2020-12-03 00:00:00
abstract::The purpose of this study was to evaluate the effects of dentin attrition, phosphoric acid etching, and cyclic loading on the microtensile bond strength (microTBS) of a self-etching adhesive system to dentin. Flat dentin surfaces of human molars were assigned to eight experimental groups based on those with or without...
journal_title:Dental materials journal
pub_type: 杂志文章,随机对照试验
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更新日期:2009-03-01 00:00:00
abstract::The purpose of this study was to evaluate, in vitro, the antimicrobial effect of iRoot BP, iRoot BP Plus, and mineral trioxide aggregate (MTA) against Entercoccus faecalis and Candida albicans by using direct contact test. The materials were tested immediately after application to the microtiter wells and after settin...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-250
更新日期:2014-01-01 00:00:00
abstract::Thermal misfit is deemed as one reason for the chipping of veneered zirconia restorations. Aim of the present study was to assess the effect of thermal misfit on the fracture load of veneered zirconia frameworks and to evaluate the applicability of a universal veneering ceramic for both zirconia and titanium framework...
journal_title:Dental materials journal
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abstract::The extent of polymerization of light-cured composite resins cured in relatively large class II cavities was estimated by measuring Knoop hardness on sectioned surfaces of resin restorations. The influences of the incremental placement technique, exposure time, and post-curing of resin inlay on the extent of polymeriz...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.12.159
更新日期:1993-12-01 00:00:00
abstract::Oral bacteria adhered to dental material surfaces are known to cause various oral diseases. This study aimed to develop a highsensitive and non-radioisotopic fluorescence dye method for quantification of oral bacteria (Streptococcus, Actinomyces and Veillonella) adhered to denture material surfaces. The amount of adhe...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2013-060
更新日期:2013-01-01 00:00:00
abstract::The aim of the present study was to measure various mechanical properties of acrylic denture base resins, including flexural modulus, flexural strength, fracture toughness, Barcol and Vickers hardness and their related properties, and to investigate correlations between different mechanical properties. Resin specimens...
journal_title:Dental materials journal
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doi:10.4012/dmj.2011-205
更新日期:2012-02-03 00:00:00
abstract::The effect of acidic fluoride solution on NiTi arch wires was examined by testing crystal structure, tensile strength, morphology after fracture, and element release from wire under four different test solutions after 1 or 3 d immersion. Three-day immersion in a 0.2%/pH 4 solution did not form any new crystal structur...
journal_title:Dental materials journal
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更新日期:2004-12-01 00:00:00
abstract::Besides micro-mechanical interlocking through hybrid-layer formation, self-etch adhesives may benefit from additional chemical interaction between the functional monomer and residual hydroxyapatite. One-step adhesives are commonly associated with lower bonding effectiveness, which must be attributed in part to the dis...
journal_title:Dental materials journal
pub_type: 杂志文章,评审
doi:10.4012/dmj.24.1
更新日期:2005-03-01 00:00:00
abstract::The purpose of this study was to investigate the effect of modifying aluminum oxide slips with magnesium oxide (MgO) to create a jointing material for In-Ceram Alumina. Jointed In-Ceram Alumina bars with In-Ceram Alumina slips containing 0-1.0 mass% MgO were examined by a three-point bending test. Joint-free bars were...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.27.251
更新日期:2008-03-01 00:00:00
abstract::This study assessed the effect of the resin-coating technique on the bond strength and internal adaptation of computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated inlays. Seventy-two mesio-occlusal-distal (MOD) cavities were prepared and distributed into 3 groups according to the resin-coating techn...
journal_title:Dental materials journal
pub_type: 杂志文章
doi:10.4012/dmj.2019-309
更新日期:2020-12-03 00:00:00