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 shear rate. The technique described should meet the requirements for assessing the rheological characteristics important in the mixing and setting of dental materials. The developed viscometer must be coupled with a sensitive mechanical testing machine capable of an adequate range of crosshead speeds that can be changed rapidly. By obtaining force vs time curves at different shear rates for setting materials, viscosity can be calculated as a function of time. Also, the viscosity at any given time during the setting process can be calculated as a function of shear rate. This chould be of aid in the interpretation of changes in rheological properties during setting of dental materials.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Combe EC,Moser JBdoi
10.1177/00220345760550021001keywords:
subject
Has Abstractpub_date
1976-03-01 00:00:00pages
223-8issue
2eissn
0022-0345issn
1544-0591journal_volume
55pub_type
杂志文章abstract：:Recent advances in molecular biology have facilitated analyses of the oral microbiome ("Who are they?"); however, its functions (e.g., metabolic activities) are poorly understood ("What are they doing?"). This review aims to summarize our current understanding of the metabolism of the oral microbiome. Saccharolytic ba...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/0022034515606045
更新日期：2015-12-01 00:00:00
abstract：:Enamel demineralization adjacent to pit and fissure sealants leads to the formation of marginal caries, which can necessitate the replacement of existing sealants. Dental materials with bioactive glass, which releases ions that inhibit dental caries, have been studied. The purpose of this study was to evaluate the ena...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515626116
更新日期：2016-05-01 00:00:00
abstract：:A complex feedback mechanism between parathyroid hormone (PTH), 1,25(OH)2D3 (1,25D), and fibroblast growth factor 23 (FGF-23) maintains mineral homeostasis, in part by regulating calcium and phosphate absorption/reabsorption. Previously, we showed that 1,25D regulates mineral homeostasis by repressing dentin matrix pr...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515599726
更新日期：2015-10-01 00:00:00
abstract：:During periods of periodontal attachment loss, one of the most significant cellular changes is a decrease in the number of fibroblasts. We previously demonstrated that LPS induces apoptosis of fibroblastic cells in vivo, largely through TNF-alpha. We conducted in vivo experiments by subcutaneous inoculation of LPS in ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910408300903
更新日期：2004-09-01 00:00:00
abstract：:Sjögren's syndrome is a common autoimmune rheumatic disease. The most common symptoms of Sjögren's syndrome are extreme tiredness, along with dry eyes (keratoconjunctivitis sicca) and dry mouth (xerostomia). Saliva plays an essential role in numerous functions of the mouth. Xerostomia can be caused by medications, chr...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/154405910808700411
更新日期：2008-04-01 00:00:00
abstract：:Various etching methods are examined with respect to their ability to induce the surface nucleation and growth of fluorapatite from solutions of low, sustained supersaturation with respect to hydroxyapatite and fluorapatite. The constant composition kinetics method enables the rates of remineralization to be precisely...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345820610091301
更新日期：1982-09-01 00:00:00
abstract：:Morphogenesis (germ-tube formation) in Candida albicans was induced gratuitously by N-acetylhexosamine derivatives (N-acetyl-glucosamine covalently linked to agarose, N-acetylmannosamine, hyaluronic acid, colloidal chitin, and mucin). These compounds were not taken up by the yeast cells and did not support growth. 2-D...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345840630031501
更新日期：1984-03-01 00:00:00
abstract：:Damage to the dentin matrix investigates the proliferation and mobilization of dental progenitor cells to the injury site, the mechanisms of which are not defined. EphB receptors and ephrin-B ligands expressed within the perivascular niche of dental pulp have been implicated following tooth injury. We propose that ele...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034509342363
更新日期：2009-09-01 00:00:00
abstract：:Based on the existing evidence supporting a state of chronic inflammation in chronic kidney disease (CKD), we hypothesized that periodontal infection may affect the systemic inflammatory status of a nationally representative CKD population as measured by serum C-reactive protein (CRP). We examined this hypothesis usin...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034511423394
更新日期：2011-12-01 00:00:00
abstract：:When one uses composite resins, the curing contraction, the stiffness of the material, and the strength of the vulnerable dentinal bond are important factors in determining the marginal adaptation of the restoration. Calculations based on these intrinsic material properties have indicated that both bulk placement and ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670050901
更新日期：1988-05-01 00:00:00
abstract：:Ten cats were immunized with subcutaneous injections of keyhole limpet hemocyanin (KLH). After it was determined that the experimental animals had developed circulating antibodies to KLH, challenge doses of KLH were administered via the root canal system. The radiographic and histologic findings suggest that antigen-a...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590011601
更新日期：1980-01-01 00:00:00
abstract：:Mutations and common polymorphisms in interferon regulatory factor 6 ( IRF6) are associated with both syndromic and nonsyndromic forms of cleft lip/palate (CLP). To date, much of the focus on this transcription factor has been on identifying its direct targets and the gene regulatory network in which it operates. Nota...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034517723615
更新日期：2017-10-01 00:00:00
abstract：:Genetic approaches are rapidly yielding new information about our sense of taste. This information comes from both molecular studies of genes encoding taste receptors and other taste-signaling components, and from studies of inherited variation in taste abilities. Our understanding of bitter taste has advanced by comb...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/154405910408300603
更新日期：2004-06-01 00:00:00
abstract：:Nearly 100% of patients experience trauma to the trigeminal nerve during orthognathic surgery, impairing sensation and sensory function on the face. In a recent randomized clinical trial, people who performed sensory re-training exercises reported less difficulty related to residual numbness and decreased lip sensitiv...
journal_title：Journal of dental research
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.1177/154405910708600616
更新日期：2007-06-01 00:00:00
abstract：:Samples of human dental plaque were pooled from several "white spot" smooth tooth surface areas as well as from several clinically-sound tooth surface areas in each of 12 caries-positive college students. Each of the two samples from each subject was used for the determination of: (1) pH-lowering potential in vitro in...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345910700120501
更新日期：1991-12-01 00:00:00
abstract：:Adhesives cured under constrained conditions develop contraction stresses. We hypothesized that, with dentin as a bonding substrate, the stress would reach a maximum, followed by a continuous decline. Stress development was determined with a tensilometer for two total-etch systems and two systems with self-etching pri...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910608500808
更新日期：2006-08-01 00:00:00
abstract：:The differential diagnosis of dental wear lesions affects their clinical management. We hypothesized that surface texture parameters can differentiate simulated erosion, abrasion, and erosion-abrasion lesions on human enamel and dentin. This in vitro study comprised 2 parts (both factorial 4 × 2), with 4 lesion types ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034516629941
更新日期：2016-05-01 00:00:00
abstract：:Selected anaerobic, capnophilic and facultative bacteria isolated from patients with various forms of periodontal health and disease were tested for their susceptibility to antibiotics and antimicrobial agents. Specific bactericidal and minimum inhibitory concentrations were compared to disc zone diameters, thereby ge...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345790580071401
更新日期：1979-07-01 00:00:00
abstract：:In the current theme of dental pulp regeneration, biological and synthetic scaffolds are becoming a potential therapy for pulp revitalization. The goal is to provide a suitable environment for cellular infiltration, proliferation, and differentiation. The extracellular matrix (ECM) represents a natural scaffold materi...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034518785124
更新日期：2018-12-01 00:00:00
abstract：:The oral microbiota was compared between Romanian adolescents with a high prevalence of caries and no dental care and Swedish caries-active and caries-free adolescents in caries prevention programs and with a low prevalence of caries. Biofilm samples were analyzed by FLX+ pyrosequencing of the V1 to V4 hypervariable r...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515609554
更新日期：2016-01-01 00:00:00
abstract：:In the past two decades, accumulated evidence has clearly demonstrated the inhibitory effects of laser irradiation on enamel demineralization, but the exact mechanisms of these effects remain unclear. The purpose of this study was to investigate the effects of low-energy CO2 laser irradiation on demineralization of bo...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345000790091401
更新日期：2000-09-01 00:00:00
abstract：:Dendritic cells, such as Langerhans cells (LC), in different ectodermal compartments may have different functional capabilities. The present study was undertaken to compare oral Langerhans cells (LC) with those of the epidermis in terms of their ability to co-stimulate T-cells in vitro. A Mixed Epithelial Cell Lymphoc...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345990780030701
更新日期：1999-03-01 00:00:00
abstract：:Antimicrobial agents, delivered either by mouthrinse or toothpaste, can be used to maintain plaque at levels compatible with oral health by (a) reducing existing plaque, (b) preventing the formation of new plaque, (c) selectively inhibiting those particular bacteria that are associated with disease, and (d) inhibiting...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/00220345920710071501
更新日期：1992-07-01 00:00:00
abstract：:The aim of the present study was to describe the patterns of dental fluorosis in the primary and the permanent dentition of children born and reared in two different fluoridated areas, one in which powdered milk suspended in tap water was commonly used (Narssaq, Greenland: 1.1 ppm fluoride in the water) and one in whi...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670050501
更新日期：1988-05-01 00:00:00
abstract：:It is generally accepted that glass ionomers inhibit secondary caries in vivo, and data from in vitro studies support this effect. The aim of this review was a systematic assessment, from the literature, of clinical evidence for the ability of glass-ionomer restoratives to inhibit secondary caries at the restoration m...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/00220345990780020101
更新日期：1999-02-01 00:00:00
abstract：:The purpose of this study was to investigate the mechanism of surface layer formation in artificial white spots. Two nondestructive nuclear micro-analysis techniques were employed to analyze windows of human dental enamel at progressive stages of an artificial lesion. Fluoride concentrations were measured to a depth o...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345830620091001
更新日期：1983-09-01 00:00:00
abstract：:Squamous cell carcinoma (SCC) of the head and neck is the sixth most frequent cancer worldwide. The survival rate is among the lowest of the major cancers and has not improved significantly in the past two decades. Extensive local invasion and regional lymph node metastasis are, in large part, responsible for the poor...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345990780061001
更新日期：1999-06-01 00:00:00
abstract：:The cariostatic effect of resin-modified glass ionomer (RMGI) on secondary root caries is well-documented. However, this beneficial effect may be dependent upon the mode of cavity surface treatment. To investigate this relationship, we studied 4 cavity surface treatments prior to the placement of RMGI: no treatment (N...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910308200214
更新日期：2003-02-01 00:00:00
abstract：:We determined the exposure to mercury from dental amalgam by comparison of blood levels of mercury before and after removal of all amalgams from ten subjects. Baseline concentrations of mercury in whole blood were measured weekly for four to 18 weeks (median = 6.6 weeks) prior to removal. All amalgams were removed in ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345890680050501
更新日期：1989-05-01 00:00:00
abstract：:Short-chain carboxylic acids (e.g., lactic acid, propionic acid, butyric acid) are metabolic by-products of bacterial metabolism which can accumulate in the gingival crevice. It is of no small consequence, therefore, that 1- to 5-mM concentrations of these acids exhibit significant biological activity, including the a...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345970760010801
更新日期：1997-01-01 00:00:00
