Abstract：
:Our objective was to compare the polymerization stress (sigma(pol)) of a series of composites obtained using poly(methyl methacrylate) (PMMA) or glass as bonding substrates, and to compare the results with those from in vitro microleakage of composite restorations. The tested hypothesis was that stress values obtained in a less rigid testing system (i.e. using PMMA) would show a better relationship with microleakage data. Five dental composites were tested: Filtek Z250 (FZ), Z100 (Z1), Concept (CO), Durafill (DU) and Heliomolar (HM). sigma(pol) was determined in 1mm high specimens inserted between two rods (Ø=5mm) of either PMMA or glass. The composite elastic modulus (E) was obtained by three-point bending. sigma(pol) and E data were submitted to a one-way analysis of variance/Tukey test (alpha=0.05). For the microleakage test (MI), bovine incisors received cylindrical cavities (Ø=5mm, h=2mm), which were restored in bulk. After storage for 24h in water, specimens were subjected to dye penetration using AgNO(3) as tracer. Specimens were sectioned twice, perpendicularly, and microleakage was measured (in millimeters) under 20x magnification. Data from MI were submitted to the Kruskal-Wallis test. Means (SD) of sigma(pol) (MPa) using glass/PMMA were FZ: 7.5(1.8)(A)/2.5(0.2)(bc); Z1: 7.3(0.5)(A)/2.8(0.3)(ab); CO: 6.8(1.1)(A)/3.2(0.5)(a); DU: 4.5(0.7)(B)/2.0(0.2)(bc); HM: 3.5(0.2)(B)/2.3(0.3)(c). sigma(pol) obtained using PMMA rods were 34-67% lower than with glass. Means (SD) for tooth average/tooth maximum microleakage were FZ: 0.92(0.19)(B)/1.53(0.30)(a); Z1: 1.19(0.21)(A)/1.75(0.20)(a); CO: 1.26(0.25)(A)/1.78(0.24)(a); DU: 0.83(0.30)(B)/1.68(0.46)(a); HM: 0.81(0.27)(B)/1.64(0.54)(a). The tested hypothesis was confirmed, as the composites showed the same ordering both in the polymerization stress test using PMMA rods and in the microleakage test.
journal_name
Acta Biomaterjournal_title
Acta biomaterialiaauthors
Boaro LC,Gonçalves F,Braga RRdoi
10.1016/j.actbio.2009.07.003subject
Has Abstractpub_date
2010-02-01 00:00:00pages
547-51issue
2eissn
1742-7061issn
1878-7568pii
S1742-7061(09)00288-8journal_volume
6pub_type
杂志文章abstract：:The use of paper-based test platforms in cell culture experiments is demonstrated. The arrays used for two-dimensional cell cultures were prepared by printing patterned structures on a paper substrate using a hydrophobic polydimethylsiloxane (PDMS) ink. The non-printed, PDMS-free areas formed the array for the cell gr...
journal_title：Acta biomaterialia
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abstract：:The usefulness of nanoscale topography in improving vascular response in vitro was established previously on hydrothermally modified titanium surfaces. To propose this strategy of surface modification for translation onto clinically used metallic stents, it is imperative that the surface should be also hemocompatible:...
journal_title：Acta biomaterialia
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更新日期：2013-12-01 00:00:00
abstract：:Biological scaffolds used in tissue engineering are incorporated in vivo by a process of cellular in-growth, followed by host-mediated degradation and replacement of these scaffolds, in which phagocytic cells from the monocyte/macrophage cell lineage play a key role. The chemical degradation of scaffolds with collagen...
journal_title：Acta biomaterialia
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doi：10.1016/j.actbio.2010.08.005
更新日期：2011-01-01 00:00:00
abstract：:Synthesis of tissue adhesives had been carried out in various laboratories in the past decades but the development is currently stalled. One of the key reasons, it is believed, is that researchers have not fully understood and resolved the role of the functional groups that are responsible for good adhesion to biologi...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2008.08.001
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abstract：:Corneal collagen cross-linking (CXL) treatment can restore vision in patients suffering from keratoconus and corneal injury, by improving the mechanical properties of the cornea. The correlation between ultraviolet-A (UVA) irradiant energies of standard CXL (SCXL) and corneal visco-hyperelastic mechanical behavior rem...
journal_title：Acta biomaterialia
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.07.007
更新日期：2010-02-01 00:00:00
abstract：:The boundary layers coating articular cartilage in synovial joints constitute unique biomaterials, providing lubricity at levels unmatched by any human-made materials. The underlying molecular mechanism of this lubricity, essential to joint function, is not well understood. Here we study the interactions between surfa...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2017.06.043
更新日期：2017-09-01 00:00:00
abstract：:The pericellular matrix (PCM) is a narrow tissue region that surrounds chondrocytes in articular cartilage. Previous parametric studies of cell-matrix interactions suggest that the mechanical properties of the PCM relative to those of the extracellular matrix (ECM) can significantly affect the micromechanical environm...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2005.02.001
更新日期：2005-05-01 00:00:00
abstract：:Meniscal tears are the most common orthopedic injuries to the human body, yet the current treatment of choice is a partial meniscectomy, which is known to lead to joint degeneration and osteoarthritis. As a result, there is a significant clinical need to develop materials capable of restoring function to the meniscus ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2014.05.004
更新日期：2014-08-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
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更新日期：2020-02-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2010.04.024
更新日期：2010-10-01 00:00:00
abstract：:Thrombus formation, due to thrombin generation, is a major problem affecting blood-contacting medical devices. This work aimed to develop a new strategy to improve the hemocompatibility of such devices by the immobilization of a naturally occurring thrombin inhibitor into a nanostructured surface. Boophilin, a direct ...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2012.07.020
更新日期：2012-11-01 00:00:00
abstract：:Promoting nerve regeneration requires engineering cellular carriers to physically and biochemically support neuronal growth into a long lasting functional tissue. This study systematically evaluated the capacity of a biosynthetic poly(vinyl alcohol) (PVA) hydrogel to support growth and differentiation of co-encapsulat...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2018.11.044
更新日期：2019-09-01 00:00:00
abstract：:Calcium hydroxide (Ca(OH)(2)) has been broadly used in endodontics, including apexification to obtain apical closure by mineralization. However, the detailed mechanism of mineralization induced by Ca(OH)(2) is still unclear. This study focuses on the function of calcium and hydroxyl ions which dissociate from Ca(OH)(2...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.08.005
更新日期：2010-02-01 00:00:00
abstract：:Novel Mg-Zr-Sr alloys have recently been developed for use as biodegradable implant materials. The Mg-Zr-Sr alloys were prepared by diluting Mg-Zr and Mg-Sr master alloys with pure Mg. The impact of Zr and Sr on the mechanical and biological properties has been thoroughly examined. The microstructures and mechanical p...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2012.04.028
更新日期：2012-08-01 00:00:00
abstract：:Stimuli responsive polyelectrolyte nanoparticles have been developed for chemo-photothermal destruction of breast cancer cells. This novel system, called layer by layer Lipo-graph (LBL Lipo-graph), is composed of alternate layers of graphene oxide (GO) and graphene oxide conjugated poly (l-lysine) (GO-PLL) deposited o...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2017.10.040
更新日期：2018-01-01 00:00:00
abstract：:Composite films of poly(lactic-co-glycolic-acid) with multi-walled carbon nanotubes (PLGA-MWCNT) having two different nanotube orientations, namely random and vertically aligned, have been fabricated and characterized. The effect of these nanostructured surfaces on platelet adhesion is evaluated. In particular, the th...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.06.003
更新日期：2009-11-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2014.02.052
更新日期：2014-07-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.01.043
更新日期：2009-07-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2018.03.047
更新日期：2018-05-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2009.10.039
更新日期：2010-04-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2012.09.004
更新日期：2013-02-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2014.02.022
更新日期：2014-06-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2010.09.024
更新日期：2011-02-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2019.01.055
更新日期：2019-07-15 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2018.03.022
更新日期：2018-05-01 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2017.05.012
更新日期：2017-07-15 00:00:00
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journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2017.05.044
更新日期：2017-08-01 00:00:00
abstract：:The use of human mesenchymal stromal cells (hMSC) for treating diseased tissues with poor vascularization has received significant attention, but low cell survival has hampered its translation to the clinic. Bioglasses and glass-ceramics have also been suggested as therapeutic agents for stimulating angiogenesis in so...
journal_title：Acta biomaterialia
pub_type： 杂志文章
doi：10.1016/j.actbio.2017.12.009
更新日期：2018-02-01 00:00:00
abstract：:Strombus gigas (conch) shells and Tridacna gigas (Giant clam) shells have dense, tailored structures that impart excellent mechanical properties to these shells. In this investigation, conch and clam seashells were converted to hydroxyapatite (HAP) by a hydrothermal method at different temperatures and for different c...
journal_title：Acta biomaterialia
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