Abstract：
:The effects of various additives on the setting of the glass-ionomer cement system was studied by means of cone and plate viscometry. The action of (+)-tartaric acid, the most important additive, on the setting reaction depended on its concentration. Low concentrations accelerated the development of viscosity of the cement paste, while high concentrations retarded it. At intermediate concentrations, (+)-tartaric acid had an interesting, uniquely favorable effect on setting characteristics. First, it induced a lag period in the setting process during which the viscosity of the cement paste remained constant. This lag period was followed by a sharp, almost exponential, increase in viscosity. Thus, (+)-tartaric acid was found to have a dual effect on setting, first inhibiting gelation and then accelerating it. The practical effect is to prolong working time and sharpen setting. No other hydroxyacid, not even meso-tartaric acid, combined these advantageous effects. Meso-tartaric acid, for example, repressed the development of viscosity at all stages of the reaction. Other hydroxyacids either accelerated or retarded the development of viscosity throughout the course of the reaction.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Hill RG,Wilson ADdoi
10.1177/00220345880670120101subject
Has Abstractpub_date
1988-12-01 00:00:00pages
1446-50issue
12eissn
0022-0345issn
1544-0591journal_volume
67pub_type
杂志文章abstract：:4-META and new phosphate-methacrylate resins adhere strongly to dental alloys. However, for strengthening the water durability of the adhesive interface, the oxidation of the alloy surface is indispensable. A new oxidation method using ion-sputtering was developed, and the effectiveness of this surface treatment on tw...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345880670110301
更新日期：1988-11-01 00:00:00
abstract：:A full understanding of the key regulators controlling periodontal development and homeostasis is necessary for the design of improved periodontal regenerative therapies. Small leucine-rich proteoglycans (SLRPs) are extracellular matrix molecules suggested to regulate collagen organization and cell signaling. Mice wit...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514541126
更新日期：2014-08-01 00:00:00
abstract：:The temporomandibular joint (TMJ) undergoes degenerative changes among patients who suffer from arthritis, and yet the pathogenesis of TMJ osteoarthritis and rheumatoid arthritis is poorly understood. We hypothesized that sustained inflammation in the TMJ induces structural abnormalities, and accordingly characterized...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512441946
更新日期：2012-05-01 00:00:00
abstract：:Sensitivity or pain of the mucoperiosteum covering the mandibular edentulous ridge is often thought to limit bite forces in complete-denture wearers. Therefore, bite forces with mandibular implant-retained overdentures may depend on the degree of implant support. This study analyzed the effects of different degrees of...
journal_title：Journal of dental research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1177/00220345980770101101
更新日期：1998-10-01 00:00:00
abstract：:As the use of adhesive restorative materials has increased during the last several years, interest in adhesive materials that release fluoride has also grown. The purpose of this study was to measure fluoride release from several adhesive restorative materials and to evaluate its effect on dentin resistance to deminer...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345990780101001
更新日期：1999-10-01 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：:The range of substrates transported by the sugar-binding protein-dependent msm (multiple sugar metabolism) system of S. mutans was investigated. By determining the ability of unlabeled sugar to compete with radiolabeled melibiose transport, we have demonstrated that the transported sugars included a number of carbohyd...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345930720100701
更新日期：1993-10-01 00:00:00
abstract：:The effect of pH on the growth and proteolytic activity of the type strain and fresh isolates of Porphyromonas gingivalis and Bacteroides intermedius was investigated. B. intermedius strains grew with and without glucose at a pH as low as 5.0. These bacteria grew almost as well as Streptococcus mutans at pH 5.0 and be...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345900690060801
更新日期：1990-06-01 00:00:00
abstract：:The dentition in zebrafish is extremely and richly vascularized, but the function of the vasculature, in view of the continuous replacement of the teeth, remains elusive. Through application of SU5416, a vascular endothelial growth factor receptor inhibitor, we studied the role of the blood vessels in the dentition of...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514557156
更新日期：2015-01-01 00:00:00
abstract：:Different types of storage media have been studied for use in the replantation of exarticulated teeth. It was found that human periodontal ligament cells survived well in milk. Fifty percent of the cells were viable after 12 hours' storage in milk, while no cells were viable after three hours' storage in saliva. Brief...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345810600111301
更新日期：1981-11-01 00:00:00
abstract：:Dental diseases are now viewed as a consequence of a deleterious shift in the balance of the normally stable resident oral microbiome. It is known that frequent carbohydrate consumption or reduced saliva flow can lead to caries, and excessive plaque accumulation increases the risk of periodontal diseases. However, whe...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/0022034517742139
更新日期：2018-04-01 00:00:00
abstract：:Degradation of dentin matrix components within caries dentin has been correlated with the activity of host-derived proteases, such as matrix metalloproteases (MMPs) and cysteine cathepsins (CTs). Since this relationship has not been fully established, we hypothesized that the abundance of MMPs and CTs in caries-affect...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513516979
更新日期：2014-03-01 00:00:00
abstract：:The cartilaginous nasal septa of 28 albino rats were marked with pairs of wire implants. Measurements obtained from cephalometric radiographs taken at 30 and 60 days revealed that the implants invariably separatd and did so at a rate that was highly correlated with the growth of the rest of the snout. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590081601
更新日期：1980-08-01 00:00:00
abstract：:A new hydroxyapatite ceramic implant material for restoration of atrophic edentulous ridges was tested in a canine animal model. The structure of this material is unique, in that it is produced from the skeleton of a coral, and in that it is penetrated by a uniform network of interconnected pores. Results indicate tha...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345830620021301
更新日期：1983-02-01 00:00:00
abstract：:Cytotoxicity of fine cut amalgam was persistent until 24 hours after trituration in vitro, whereas cytotoxicity of spherical amalgam diminished more quickly. Increasing mercury content in spherical amalgam increased cytotoxicity. Possible reactions for the diminution of cytotoxicity of amalgams with time are discussed...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：
更新日期：1975-03-01 00:00:00
abstract：:It has been shown that a release of periosteal tension may augment the growth of a long bone; however, similar experiments in the mandible have produced equivocal results. For further definition of the role of periosteal tension in the growth of the mandibular condyle, 80 young female Sprague-Dawley rats were randomly...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345900690090201
更新日期：1990-09-01 00:00:00
abstract：:Laser-Raman spectra of synthetic apatites containing from zero to 12.4 wt% carbonate ions and enamel apatite are reported. Special attention is paid to the correlation between the intensities of the carbonate, phosphate, and hydroxyl modes and the carbonate content in the apatites. The data presented here indicate tha...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345810600031601
更新日期：1981-03-01 00:00:00
abstract：:With clinical oral examinations not always possible in health surveys, researchers may instead be invited to add questions to a wider health survey. In such situations, an item is needed which adequately represents both clinical and self-reported oral health. This study investigated the clinical validity of Locker's g...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512460676
更新日期：2012-11-01 00:00:00
abstract：:The inhibitory activity of 2-phosphono-butane 1,2,4 tricarboxylic acid (PBTA) in the formation of hydroxyapatite (HA) was studied in vitro and in vivo. PBTA, at 4 ppm, inhibited the spontaneous formation of HA in vitro from a supersaturated solution. PBTA, at 2 ppm, completely inhibited the crystal growth of HA; at lo...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345850640011201
更新日期：1985-01-01 00:00:00
abstract：:The temporal and spatial patterns in which teeth are initiated in the growing jaws of embryos are constant for a species but different for different species. The sources of the patterns have been explained in two ways. First, they are the outcome of reactions between molecules created at stationary targets and those w...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345980770090901
更新日期：1998-09-01 00:00:00
abstract：:Clinical studies have shown that metabolic syndrome (MetS) is associated with increased risk of developing periodontitis. However, the underlying mechanisms remain largely unknown. Since it is known that lipopolysaccharide (LPS)-activated toll-like receptor 4 signaling pathways play a crucial role in periodontitis, we...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034514561658
更新日期：2015-02-01 00:00:00
abstract：:Fluoride content of drinking water is an important criterion in prescribing fluoride supplements. The majority of practicing dentists and physicians prescribe fluoride supplements, yet many apparently are unaware of the fluoride levels in their patients' drinking water. Characteristics of North Carolina (NC) dentists,...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345860650011301
更新日期：1986-01-01 00:00:00
abstract：:A silver-plating technique was developed in an effort to produce good mechanical bonding characteristics between stainless steel pins and amalgam. Metallographic microscope and scanning electron microscope (SEM) studies were made to assess the presence, or otherwise, of such a bond between (a) the silver layer plating...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345800590020301
更新日期：1980-02-01 00:00:00
abstract：:A dental appointment commonly prompts fear of a painful experience, yet we have never fully understood how our brains react to the expectation of imminent tooth pain once in a dental chair. In our study, 21 patients with hypersensitive teeth were tested using nonpainful and painful stimuli in a clinical setting. Subje...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515581642
更新日期：2015-07-01 00:00:00
abstract：:Bilateral resections of the superficial masseter, posterior temporal, and anterior digastric muscles of rats were done to determine their effects on mandibular growth. The macroscopic findings support the functional matrix theory of mandibular growth. The analysis of body weight and the statistical two-way analysis of...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550052301
更新日期：1976-09-01 00:00:00
abstract：:The oral microbiome is one of the most stable ecosystems in the body and yet the reasons for this are still unclear. As well as being stable, it is also highly diverse which can be ascribed to the variety of niches available in the mouth. Previous studies have focused on the microflora in disease-either caries or peri...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/0022034520915486
更新日期：2020-06-01 00:00:00
abstract：:Khat-chewing has been associated with oral lesions including oral cancer, but the mechanisms leading to their development are not known. We hypothesized that khat interferes with the physiological processes of the oral mucosa, such as cell proliferation and differentiation, and aimed at investigating the effects of kh...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034509354980
更新日期：2010-03-01 00:00:00
abstract：:The incorporation of polymerizable cationic monomers has been attempted to generate dental resinous materials with antibacterial activity. This study tested the hypothesis that a dental adhesive containing a cationic monomer, methacryloxylethyl cetyl dimethyl ammonium chloride (DMAE-CB), would influence biofilm format...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034509334499
更新日期：2009-04-01 00:00:00
abstract：:In this study, the effects of eugenol on human polymorphonuclear (PMN) cell migration and chemiluminescence were examined in vitro. Utilizing zymosan-activated serum or crude Bacteroides sonicate fractions as chemotractants, we found that eugenol inhibits PMN migration at 6.6 X 10(-2) to 6.6 X 10(-5) mol/L (P less tha...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345870660031401
更新日期：1987-03-01 00:00:00
abstract：:Evidence that dental status affects diet is equivocal. The hypothesis of this study was that diet was affected by dental status. The objective was to assess the relationship between numbers of teeth and diet and nutritional status in US adult civilians without prostheses. We examined 6985 NHANES (1988-1994) participan...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910708601206
更新日期：2007-12-01 00:00:00
