Abstract：
:Improved mechanical properties of resin composites have been reported to be a consequence of the addition of aldehyde to the resins. The objective of the present study was to examine whether this improvement could be attributed to an increased degree of conversion of double bonds. For this purpose, propanal was added to monomer mixtures, which were then made light-curing. The monomer mixtures were varied with respect to monomer composition and content of propanal. The quantity of remaining double bonds was determined by means of transmission infrared spectra of the resins recorded before and after wet or dry storage for one week. The addition of propanal resulted in a decrease in the quantity of remaining double bonds by as much as 89% as compared with the mixtures without propanal. Negative correlations of statistical significance were found between the content of propanal and quantity of remaining double bonds in BISGMA:TEGDMA-based as well as in UEDMA:HEMA-based resins for both modes of storage. Significant negative correlations were found between the quantity of remaining double bonds and the previously determined mechanical properties.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Peutzfeldt Adoi
10.1177/00220345940730101101subject
Has Abstractpub_date
1994-10-01 00:00:00pages
1657-62issue
10eissn
0022-0345issn
1544-0591journal_volume
73pub_type
杂志文章abstract：:The effect of inflammation on the distribution of chondroitin sulfate and dermatan sulfate proteoglycans was assessed after normal and inflamed human gingivae were stained with monoclonal antibodies against these extracellular matrix macromolecules. The tissues were obtained following periodontal surgery and reacted w...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345920710090801
更新日期：1992-09-01 00:00:00
abstract：:The synthesis of many polycarboxylic acids is reported. An account is given of their stability in aqueous solution and the properties of cements formed by their reaction with ion-leachable glasses. A copolymer of acrylic and itaconic acids was found to combine several favorable characteristics. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590060801
更新日期：1980-06-01 00:00:00
abstract：:Conservative techniques for improving the appearance of discolored teeth have become popular in the past decade. These include: in-office bleaching with 30% hydrogen peroxide, which is applied on etched enamel with a gauze pad and then exposed to a bleaching light; home bleaching with a mild form of peroxide, such as ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345930720011001
更新日期：1993-01-01 00:00:00
abstract：:Stress analyses are presented for a second mandibular premolar with a class 1 amalgam restoration. The effects of amalgam setting and thermal expansions are examined. An axisymmetric representation of the structure is used and the analyses are carried out by the finite element method. Lined and unlined restorations ar...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345780570051101
更新日期：1978-05-01 00:00:00
abstract：:Smoking is a major risk of periodontal diseases. At the site of first contact, the gingiva is exposed to aromatic amines and polycyclic hydrocarbons. These are metabolized by the N-acetyltransferases (NAT), leading to local detoxification and/or activation reactions contributing to the risk of periodontal destruction ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910208100512
更新日期：2002-05-01 00:00:00
abstract：:Polynomial and catenary equations were fit by least square error methods to the dentitions of seven children with "normal" occlusion. Mean and mean square error were then used to analyze accuracy of curve fits and asymmetries of arches. A lack of congruency for the "lines of occlusion" common to the maxilla and mandib...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345750540060501
更新日期：1975-11-01 00:00:00
abstract：:During the setting of a resin composite cement (RCC) used as an adhesive between a resin-bonded bridge and tooth structure, the adhesion may be disrupted by the development of shrinkage stress. The aim of this study was to investigate the influence of the shrinkage stress of three different RCCs on their adhesive and ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345920710021101
更新日期：1992-02-01 00:00:00
abstract：:Enamel crystals in the demineralized zones in early caries lesions of human teeth were observed by high-resolution electron microscopy. The enamel crystals frequently exhibited perforations in their centers and defects of various sizes on their lateral surfaces. There were a number of small electron-lucent spots, sugg...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345870660110901
更新日期：1987-11-01 00:00:00
abstract：:Relative glycogen synthetic abilities of resting cells of fresh clinical isolates of Actinomyces viscosus and Actinomyces naeslundii originating from dental plaque samples over root surface caries lesions and non-carious sites were studied under anaerobic conditions at a constant pH of 7.0, with U-(14C)-glucose used a...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345860650060701
更新日期：1986-06-01 00:00:00
abstract：:Transglutaminase-2 (TGM-2) stabilizes extracellular matrix (ECM) proteins by cross-linking and has been implicated in several fibrotic disorders. Arecoline present in betel quid has been proposed as one of the causative factors for oral submucous fibrosis (OSMF). Hence, we hypothesize that arecoline may regulate TGM-2...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034508329633
更新日期：2009-02-01 00:00:00
abstract：:The sagittal and frontal active envelope of border movement is applied regularly as a clinical tool in functional examinations of the human masticatory system. In contrast, the three-dimensional movement area has hardly been examined. Furthermore, the determinants of this area are not established unambiguously. In the...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345010800100901
更新日期：2001-10-01 00:00:00
abstract：:We conducted a school-based parallel cluster randomized controlled trial with 36-month follow-up of children aged 7 to 8 years. Primary schools were randomly assigned to 2 groups: 3 applications of fluoride varnish (22,600 ppm) each year or no intervention. The primary outcome was DFS increment in the first permanent ...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034511422063
更新日期：2011-11-01 00:00:00
abstract：:Weanling rice rats were fed either standard laboratory chow or Diet 2000. The animals were sacrificed at 4, 8, 12, and 15 weeks. There was an increasing amount of exposed root surface and root surface caries with age in the animals fed Diet 2000. There was exposed root surface but no caries in the animals fed laborato...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345770560091701
更新日期：1977-09-01 00:00:00
abstract：:Teeth develop through distinct morphological stages. At the cap stage, a compactly clustered and concentrically arranged cell mass, the enamel knot, appears at the tip of the enamel organ. Cells in this knot express sets of key molecules, and as such have been proposed to act as a signaling center directing tooth morp...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514525784
更新日期：2014-05-01 00:00:00
abstract：:Administration of indomethacin inhibited the appearance of osteoclasts and bone resorption induced by experimental tooth movement in rats. Effects were limited to groups injected within 12 h after treatment. Prostaglandin E1 or E2 solutions injected in gingiva lying near the upper first molar caused the appearance of ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590101301
更新日期：1980-10-01 00:00:00
abstract：:The major phosphoprotein in dentin is the aspartic acid and serine-rich protein called dentin phosphophoryn (DPP). DPP appears to be synthesized as a part of a larger compound protein, dentin sialophosphoprotein (DSPP). DSPP has never been isolated or detected in dentin extracts. It is now evident that DSPP is a chime...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513516631
更新日期：2014-02-01 00:00:00
abstract：:The junctional epithelium (JE) is unique with regard to its wide intercellular spaces and sparsely developed intercellular junctions. Thus, knowledge of the molecular mechanisms that regulate the formation of the intercellular junctions of the junctional epithelium may be essential to understand the pathophysiology of...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515619375
更新日期：2016-03-01 00:00:00
abstract：:An indirect extrusion capillary viscometer has been developed. This has been tested for nonsetting Newtonian fluids and was found to give results close to, but slightly lower than the actual viscosity. The same apparatus has been successfully applied to a non-Newtonian fluid to determine the dependence of viscosity on...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550021001
更新日期：1976-03-01 00:00:00
abstract：:Odontoblasts and fibroblasts are suspected to influence the innate immune response triggered in the dental pulp by micro-organisms that progressively invade the human tooth during the caries process. To determine whether they differ in their responses to oral pathogens, we performed a systematic comparative analysis o...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910808700304
更新日期：2008-03-01 00:00:00
abstract：:The frequency and impact of temporomandibular joint (TMJ) disorders necessitate research in characterizing the joint's function. The 6 discal attachments have not yet been systematically characterized under tension. Understanding their role in joint function may guide our study of TMJ pathologies, including disc displ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513494817
更新日期：2013-08-01 00:00:00
abstract：:Bisphosphonates are a class of agents used to treat osteoporosis and malignant bone metastases. The efficacy of these agents in treating and preventing the significant skeletal complications associated with these conditions has had a major positive impact for patients and is responsible for their widespread use in med...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/154405910708601101
更新日期：2007-11-01 00:00:00
abstract：:Knoop hardness measurements of UV-polymerized dental composites showed that, at a certain depth below the surface, the degree of cure rapidly decreases. The depth of cure was found to be critically dependent on the UV source and exposure time used. A theoretical model was derived which was in quantitative accord with ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590050901
更新日期：1980-05-01 00:00:00
abstract：:Sealants are highly effective in preventing dental caries in the pits and fissures of teeth when applied by trained operators in clinical trials and public health programs. The effectiveness of fissure sealants when applied in dental practices is still not known. The purpose of this longitudinal study was to evaluate ...
journal_title：Journal of dental research
pub_type： 临床试验,杂志文章
doi：10.1177/00220345950740091301
更新日期：1995-09-01 00:00:00
abstract：:The effects of oral rinses on enamel fluoride uptake, caries, and plaque pH in rats were investigated by use of (1) an acidic calcium phosphate solution (CPS) saturated with dicalcium phosphate dihydrate (DCPD) and (2) a 1% fluoride solution. Osborne-Mendel rats, 19 days of age, were randomly assigned to one of four m...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670061401
更新日期：1988-06-01 00:00:00
abstract：:Interfacial bond strengths of light-activated composites were measured as a function of age using a transverse strength test. Bond strength between layers decreased with the age of the initial layer and reflected the setting curves of the composites. The highly-filled composites exhibited the greatest bond strengths. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345840630101501
更新日期：1984-10-01 00:00:00
abstract：:Two copper-free amalgams expanded excessively after storage in air at 60 degrees C for about five yr. One expanded significantly at 37 degrees C and slightly at 23 degrees C. High silver content, absence of copper, and presence of small amounts of zinc, or all three, seemed to promote very high expansions at 60 degree...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345820610063301
更新日期：1982-06-01 00:00:00
abstract：:Rat parotid secretory granule membranes were examined for the presence of calcium-dependent protein kinase activities and kinase substrates. Protein kinase C (C-kinase), which is stimulated by certain phospholipids, was present in the membranes, as indicated by its ability to catalyze the phosphorylation of histone. T...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345870660022901
更新日期：1987-02-01 00:00:00
abstract：:Tooth enamel is the most highly mineralized tissue in vertebrates. Enamel crystal formation and elongation should be well controlled to achieve an exceptional hardness and a compact microstructure. Enamel matrix calcification occurs with several matrix proteins, such as amelogenin, enamelin, and ameloblastin. Among th...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514547272
更新日期：2014-10-01 00:00:00
abstract：:The size of a bolus determines how it will be manipulated in the mouth and swallowed. We hypothesized that mucosal sensitivity would be important for masticatory function. The accuracy of solid object size perception, spatial acuity, and food particle size reduction during mastication were measured in 22 healthy adult...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910408300507
更新日期：2004-05-01 00:00:00
abstract：:Molar teeth of four groups of Osborne-Mendel rats, kept on a cariogenic diet, were treated once per day for 48 days with either distilled water (solution C), a solution containing 0.05% chlorhexidine gluconate and 0.04% NaF, pH 5.8 (solution CXF), CXF plus 1000 ppm Sr (solution CXFS), or CXFS plus 1000 ppm Zn (solutio...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345840630100401
更新日期：1984-10-01 00:00:00
