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 10% carbamide peroxide, which is applied on the tooth surface with custom-made mouthguards; and enamel micro-abrasion with 18% hydrochloric acid, which is applied in a pumice slurry. In this study, the in-office bleaching and enamel micro-abrasion techniques were performed on extracted teeth for investigation of their microscopic effects on the surface enamel. Specimens treated only with 37% phosphoric acid showed an enamel loss of 5.7 +/- 1.8 microns. The specimens treated with 37% phosphoric acid followed by 30% hydrogen peroxide showed enamel loss of 5.3 +/- 1.6 microns; this loss was probably not caused by the hydrogen peroxide, but rather by the etching with 37% phosphoric acid which preceded the hydrogen peroxide application. A direct application of 18% hydrochloric acid for 100 s resulted in a loss of 100 +/- 47 microns. The extent of enamel loss was much greater when the 18% hydrochloric acid was applied in a pumice slurry for the same period of time (360 +/- 130 microns), and the effect was time-dependent. Thus, the pumice and rotary prophy cup used in conjunction with the 18% hydrochloric acid contributed markedly to the loss of surface enamel, enhancing the non-selective stain-removing action of the hydrochloric acid. Therefore, the hydrochloric acid-pumice technique must be used clinically with caution.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Tong LS,Pang MK,Mok NY,King NM,Wei SHdoi
10.1177/00220345930720011001subject
Has Abstractpub_date
1993-01-01 00:00:00pages
67-71issue
1eissn
0022-0345issn
1544-0591journal_volume
72pub_type
杂志文章abstract：:Significant inhibition of PMN metabolic activity by F- occurred at 0.1, 0.5 and 0.0 mM F- for O2- generation, 1-C14 CO2 release labeled glucose and NBT-reduction respectively. This inhibition resulted primarily from F- suppression of nonoxidative glucose metabolism. As the concentration of F- in the O2- generating sys...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345790580092101
更新日期：1979-09-01 00:00:00
abstract：:Each odontoblast is tightly linked to other odontoblasts. They form a line of defense and are capable of withstanding external stimuli, particularly the inflammation caused by caries. Thus, we investigated exosomes derived from odontoblasts as an intercellular mechanism by which inflamed odontoblasts are protected fro...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034519869580
更新日期：2019-10-01 00:00:00
abstract：:The work described considers the effects on calcified tissues of those concentrations of fluoride which are not overtly cyto-toxic, i.e., in the general region of up to 1-2 mumol/L. Plasma fluoride concentrations or those of the cellular environment are considered rather than dietary levels. The effect of fluoride ion...
journal_title：Journal of dental research
pub_type： 杂志文章,评审
doi：10.1177/00220345900690S134
更新日期：1990-02-01 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 classic stimulus for cellular cytokine production is bacterial lipopolysaccharide (endotoxin). It was therefore hypothesized that tumor necrosis factor-alpha (TNF-alpha) may be responsible for pericoronitis. TNF-alpha and its receptors were detected by immunohistochemical staining in third molar pericoronitis in t...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910508401216
更新日期：2005-12-01 00:00:00
abstract：:The acquired enamel pellicle is an oral, fluid-derived protein layer that forms on the tooth surface. It is a biologically and clinically important integument that protects teeth against enamel demineralization, and abrasion. Tooth surfaces are exposed to different proteinaceous microenvironments depending on the enam...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034516680771
更新日期：2017-04-01 00:00:00
abstract：:During the 18th century, France was the leader in the field of dentistry, exemplified by Pierre Fauchard (1678-1761), who was given the title "the father of modern dentistry" for his comprehensive work, Le Chirurgien Dentiste. This paper examines an 18th century dental treatment in a barely 50-year-old male whose body...
journal_title：Journal of dental research
pub_type： 历史文章,杂志文章
doi：10.1177/0022034508329872
更新日期：2009-03-01 00:00:00
abstract：:The sensitizing potential of three periodontal dressing materials was evaluated by the guinea pig maximization test. The results indicated a difference in the sensitization rate of the three materials. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345780570110801
更新日期：1978-11-01 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：:The purpose of this investigation was to examine the inhibitory effects of aqueous extracts derived from the bark-containing sticks (Neem stick) of Azadirachta indica upon bacterial aggregation, growth, adhesion to hydroxyapatite, and production of insoluble glucan, which may affect in vitro plaque formation. Neem sti...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345960750021301
更新日期：1996-02-01 00:00:00
abstract：:The use of electric current during the application of etch-and-rinse adhesive systems has been recently claimed to increase bonding of etch-and-rinse adhesives by enhancing substrate impregnation. The null hypothesis tested in this study was that electrically assisted application has no effect on bond strength of self...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910608501205
更新日期：2006-12-01 00:00:00
abstract：UNLABELLED:Excessive mechanical stress (MS) during hyperocclusion is known to result in disappearance of the alveolar hard line, enlargement of the periodontal ligament (PDL) space, and destruction of alveolar bone, leading to occlusal traumatism. We have recently reported that MS induces predominantly C-C chemokine li...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512467803
更新日期：2013-01-01 00:00:00
abstract：:Although the contribution of the oral microbiota to oral malodor is well-documented, the potential role of Gram-positive micro-organisms is unclear. In the current study, we tested the hypothesis that Gram-positive micro-organisms contribute to malodor production by deglycosylating oral glycoproteins, rendering them s...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910608501007
更新日期：2006-10-01 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：:Silver cations generated by passing low intensity direct current through pure silver electrodes were found to be sufficiently antibacterial to cause sterilization of samples of infected dentin. The optimal procedure involved a 5 microA current applied for 20 minutes with the anode then left in contact with the sample....
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345780570091901
更新日期：1978-09-01 00:00:00
abstract：:In a three-year study of 145 adolescent males in a boarding school in Wisconsin, there were no statistically significant differences in dental caries experience between a group consuming phosphates added to pre-sweetened and non-presweetened ready-to-eat cereals, and the control group, or between cereal eaters and non...
journal_title：Journal of dental research
pub_type： 临床试验,杂志文章
doi：10.1177/00220345790580090201
更新日期：1979-09-01 00:00:00
abstract：:In 1984, a four-year mixed-longitudinal study of oral health was begun in Morogoro Town and Morogoro District, Tanzania. Its main goal was to detect a possible upward trend in prevalence of caries in child cohorts in this developing country. The sample consisted of 722 seven- to nine-year-olds in 1984, 833 seven- to 1...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345890680121101
更新日期：1989-12-01 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：:Significant associations between atherosclerosis and both Porphyromonas gingivalis, a major periodontopathogen, and the respiratory pathogen, Chlamydia pneumoniae, have been shown. Many individuals with evidence of atherosclerosis demonstrate seropositivity to these pathogens. The aim of the present study was to exami...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910708600105
更新日期：2007-01-01 00:00:00
abstract：:Matrix metalloproteinase (MMP) inhibition has been shown to reduce adhesive bond degradation when applied as a pre-conditioner, adding to clinical steps in the placement of adhesives, but their incorporation within dental adhesives has not been fully explored. This study examined the effect of including 2 MMP inhibito...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034512446339
更新日期：2012-06-01 00:00:00
abstract：:This study investigated the relevance between pulp vitality and autophagy in aged human dental pulp cells (HDPCs) and whether peroxisome proliferator-activated receptor gamma (PPARγ) affects autophagy regulation for homeostasis in the aging progress. In vivo experiments were used in human and Sprague-Dawley rat teeth ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515573833
更新日期：2015-05-01 00:00:00
abstract：:The solubilities of extracellular polysaccharide fractions produced by 14 oral streptococcal strains were compared in water, aqueous lithium and guanidine salt solutions, dimethyl sulfoxide (DMSO), and a 9:1 DMSO-water mixture. The best results for solubilizing the fractions were obtained with the DMSO-water mixture p...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345750540042601
更新日期：1975-07-01 00:00:00
abstract：:The adsorption isotherms of benzoic acid on synthetic hydroxyapatite (containing about 1.5 monolayers of physisorbed water) were studied from ethanol, dimethylsulfoxide, p-dioxane, methylene chloride, and benzene to discern the role of solvent in the process. The adsorption is reversible from the first three solvents ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345860650051601
更新日期：1986-05-01 00:00:00
abstract：:Lipopolysaccharide (LPS) has been shown to be a prominent pathogenic factor in inflammatory bone loss. However, knowledge of the mechanisms involved is limited. The role of the SDF-1/CXCR4 (Stromal-derived factor-1 and its unique chemokine receptor) axis in LPS-induced bone loss has not been studied. The aim of this s...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034510379019
更新日期：2011-02-01 00:00:00
abstract：:Cross-sectional areas of the masseter, temporalis and medial, and lateral pterygoid muscles were determined in 16 subjects by means of computer tomography. In each subject three scans were made, intersecting the thickest part of the muscles at right angles to the fiber direction. The masseter and medial pterygoid musc...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345840630091201
更新日期：1984-09-01 00:00:00
abstract：:The acquired dental pellicle helps prevent erosion, but the protection level is unknown. This in situ study tested whether a two-hour pellicle protects against different erosive challenges by orange juice. Subjects wore palatal appliances loaded with either enamel or dentin specimens. Pellicle was allowed to form, or ...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/154405910608500706
更新日期：2006-07-01 00:00:00
abstract：:Fibroblast cultures derived from uninjured and reparative rabbit buccal mucosa were compared in terms of extracellular glycosaminoglycan (GAG) content and cellular response to interleukin-1 (IL-1). Under identical growth conditions, proliferation of both cell lines was the same. Both lines incorporated [3H]-glucosamin...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345890680010801
更新日期：1989-01-01 00:00:00
abstract：:Despite recent advances revealing genetic factors influencing caries susceptibility, questions regarding the model of inheritance involved are yet to be addressed. We conducted a Complex Segregation Analysis on decayed teeth in a sample of homogenous, isolated families recruited from the Brazilian Amazon. A dominant, ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034510397614
更新日期：2011-06-01 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：:Minimally invasive caries-removal procedures remove only caries-infected dentin and preserve caries-affected dentin that becomes remineralized. Dental cements containing calcium phosphate promote remineralization. This study evaluated the in vivo remineralization capacity of resin-based calcium-phosphate cement (Ca-P)...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034509360155
更新日期：2010-03-01 00:00:00
