Abstract:
:After exposing enamel specimens to 0.3% citric acid at pH 3.2 for various times, the acid was titrated to pH 7 before rinsing the specimens in water. After freeze-drying the specimens were examined by scanning electron microscopy. This procedure eliminates artefacts due to drying and mineral precipitation. The results showed that the outer region of softened enamel is much more delicate than previously thought, even after short (5- to 20-min) etching times. Mineral was lost from both prism boundaries and the prism bodies, resulting in a surface presenting thin, separate crystal bundles. In further studies, replicas of subsurface pores, created by resin impregnation, showed the softening depth to be several times greater than is suggested by techniques based on removing the softened enamel by physical forces. The results point to a need for improved methods of measuring softening depth. More importantly, it appears that the outer region of the softened layer remaining after an erosive challenge might be too fragile to resist frictional forces in vivo.
journal_name
Caries Resjournal_title
Caries researchauthors
Eisenburger M,Shellis RP,Addy Mdoi
10.1159/000073923subject
Has Abstractpub_date
2004-01-01 00:00:00pages
67-74issue
1eissn
0008-6568issn
1421-976Xpii
73923journal_volume
38pub_type
杂志文章相关文献
CARIES RESEARCH文献大全abstract::Erosion of the buccal incisor enamel, most frequent in the upper jaw, has been associated with excessive oral exposure to citric acid-containing foodstuffs. The aim of the study was to determine the retention of citric acid at different sites in the mouth after a standardized exposure. Thirty-four normal subjects rins...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000262116
更新日期:1995-01-01 00:00:00
abstract::This review aims to outline the effects of fluoride on the biological processes involved in the formation of tooth tissues, particularly dental enamel. Attention has been focused on mechanisms which, if compromised, could give rise to dental fluorosis. The literature is extensive and often confusing but a much clearer...
journal_title:Caries research
pub_type: 杂志文章,评审
doi:10.1159/000077766
更新日期:2004-05-01 00:00:00
abstract::The objective of this study was to evaluate the effects of irradiation and surface condition on in situ remineralization of demineralized human and bovine enamel. Specimens (n=96) obtained from 24 human molars and 24 bovine incisors were prepared. The surfaces of half of the specimens were abraded while the others rem...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000091059
更新日期:2006-01-01 00:00:00
abstract::There is ample evidence that caries can develop well into the middle-aged years, and for many subjects, for most of their adult lives. The kinds of benefits to expect for adults in the longer term for improved fluoride products, especially dentifrices, based upon small observed relative improvements in short-term effi...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000261561
更新日期:1993-01-01 00:00:00
abstract::After the introduction of fluoridated table salt in the staff cafeteria (VZM) of the Heidelberg University Medical and Dental School, the opportunity was taken to determine urinary fluoride excretion of those eating their main daily meals there. Subjects collected 24-hour urine in three fractions (mornings, afternoons...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000066540
更新日期:2002-11-01 00:00:00
abstract::One aim of the present laboratory study was to determine whether a visual scoring system (ERK) developed for occlusal caries could be applied to approximal lesions. A new histological technique (autofluorescence, AF) recognises dentine that is soft and would be removed with an excavator during operative treatment. A s...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000069018
更新日期:2003-03-01 00:00:00
abstract::In 1995, a dental survey was performed among adults aged 25-54 in the Dutch city of 's-Hertogenbosch. A similar study was performed in the same city in 1983 and the aim of the present study was to describe trends in oral health from 1983 to 1995. National data show that the percentage of edentulous persons aged 30-39 ...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000016448
更新日期:1998-01-01 00:00:00
abstract::The acidogenic and cariogenic potential of plain and supplemented human and bovine milk was determined by pH tests and with intra-oral experiments. Human milk produced a lower pH than bovine milk and bovine milk with a 2% lactose supplement. Human milk caused greater softening of enamel than bovine milk in the intra-o...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000262356
更新日期:1996-01-01 00:00:00
abstract::This study aimed to (1) record the plaque and gingival status on sound and carious approximal surfaces and (2) investigate whether the two parameters could predict approximal lesion progression. For this purpose two samples were selected among 18- to 25-year-old patients at the Dental Faculty in Copenhagen. Sample 1 c...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000016428
更新日期:1998-01-01 00:00:00
abstract::Surface prismatic and aprismatic human enamel and unpolished or diamond-polished specimens of bovine enamel, with test and control surfaces on each studied block, were immersed in phosphoric acid containing cola beverage (pH 2.6) and citric or malic acid containing sports drinks (pH 2.8 and 3.4, respectively) for 15-1...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000261348
更新日期:1991-01-01 00:00:00
abstract::The objectives were (1) to assess caries development, including the incidence and rate of lesion progression, in a Swedish cohort from adolescence to young adulthood and (2) to compare the caries incidence rates in adolescents with those of young adults. The original material consisted of 536 children aged 11-13 years...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000075937
更新日期:2004-03-01 00:00:00
abstract::The study of plaque biofilms in the oral cavity is difficult as plaque removal inevitably disrupts biofilm integrity precluding kinetic studies involving the penetration of components and metabolism of substrates in situ. A method is described here in which plaque is formed in vivo under normal (or experimental) condi...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000262398
更新日期:1997-01-01 00:00:00
abstract::This crossover study evaluated the effect of calcium carbonate (CaCO(3))-based monofluorophosphate dentifrice on enamel remineralization. Ten volunteers wore palatal appliances containing four enamel blocks with caries-like lesions, two of them covered by a test plaque of mutans streptococci. The following treatments ...
journal_title:Caries research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000084807
更新日期:2005-05-01 00:00:00
abstract::This paper describes the dental health status of Italian 4-year-olds in 2004/2005 and analyzes the association between caries in preschool children and some background characteristics in children and parents. Caries was recorded according to WHO criteria. 5,538 subjects were examined. Information on the children's and...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000211719
更新日期:2009-01-01 00:00:00
abstract::This study investigated the relationship of arginine deiminase (ADS) and urease activities with dental caries through a case-control study. ADS and urease activities were measured in dental smooth-surface supragingival plaque and whole saliva samples from 93 subjects, who were in three different groups: caries-free (n...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000321139
更新日期:2010-01-01 00:00:00
abstract::Little is known about the long-term effects of fluoride-releasing materials on carious dentine in vivo. The aim was to investigate the 2-year influence of a resin-modified glass ionomer cement (RM-GIC) and amalgam on the bacteriological counts of carious dentine that remained under class I restorations. To enable a sp...
journal_title:Caries research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000016506
更新日期:1999-01-01 00:00:00
abstract::Mutans streptococci (MS) and lactobacillus (LB) counts (CRT Bacteria chair-side test) were compared and correlated with the respective caries experience (DMF) of cystic fibrosis (CF) homozygotes (n = 20), CF heterozygotes (n = 20) and healthy controls (n = 20). Each group of subjects was divided into two equal age gro...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000047483
更新日期:2001-11-01 00:00:00
abstract::Lycasin was included in diets fed to caries-active Osborne-Mendel rats for periods up to 8 weeks. The animals could tolerate up to 15-16% of Lycasin in dry-powder diets and up to 25% in pelleted diets before gastro-intestinal disturbance. Lycasin 80/55 at 25% in the diet was non-cariogenic, producing a very low level ...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000261123
更新日期:1988-01-01 00:00:00
abstract::This in vitro study compared the effect of TiF4 varnish with that of NaF varnish, applied on pre-eroded bovine dentin samples, with respect to the progression of erosive loss, in the presence or absence of the demineralized organic matrix (DOM). One hundred and sixty bovine dentin samples were pre-eroded (0.1% citric ...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000475534
更新日期:2017-01-01 00:00:00
abstract::Previously, a mixed culture chemostat system was used to demonstrate that the pH generated from carbohydrate metabolism, rather than carbohydrate availability per se, was responsible for the shifts observed in the oral microflora which are associated with high carbohydrate diets and the development of dental caries. T...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000016487
更新日期:1998-01-01 00:00:00
abstract::The Nyvad classification is a visual-tactile caries classification system devised to enable the detection of the activity and severity of caries lesions with special focus on low-caries populations. The criteria behind the classification reflect the entire continuum of caries, ranging from clinically sound surfaces th...
journal_title:Caries research
pub_type: 杂志文章,评审
doi:10.1159/000480522
更新日期:2018-01-01 00:00:00
abstract::A split-mouth randomized clinical trial was carried out to assess the effectiveness of sealants in preventing carious ICDAS (International Caries Detection and Assessment System) 3-6 lesions within a 2-year follow-up. We evaluated the effectiveness of 2 types of resin-based sealants, with and without fluoride, their r...
journal_title:Caries research
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1159/000486426
更新日期:2018-01-01 00:00:00
abstract::The aim of the present investigation was to study the prevalence of approximal caries lesions and fillings in posterior teeth at 15 years of age in a prospectively followed Swedish population (n = 568), with special reference to their caries experience at the age of 3 years. Only approximal surfaces were recorded, sin...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000104798
更新日期:2007-01-01 00:00:00
abstract::To study the effects of prolonged and exclusive breast-feeding on dental caries, we followed up children participating in the Promotion of Breastfeeding Intervention Trial (PROBIT), a cluster-randomized trial of a breast-feeding promotion intervention based on the WHO/UNICEF Baby-Friendly Hospital Initiative. A total ...
journal_title:Caries research
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1159/000108596
更新日期:2007-01-01 00:00:00
abstract::Nine-day-old rats were given oral fluoride doses (0.5 micrograms F/g body weight). Plasma, enamel organ, muscle and liver samples were collected from nondosed pups (baseline) and 15, 30, 60 and 120 min after the dose. Samples were assayed for fluoride and calcium concentrations. Adult rats were given 20 ppm F water fo...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000261449
更新日期:1992-01-01 00:00:00
abstract::A double-blind 3-year clinical trial was conducted in a nonfluoridated water community in which 354 schoolchildren aged 9-10 years were assigned randomly to three groups (A, B and C) and subjected to a treatment with 1 of 3 different concentrations of amine fluoride solution every 2 months. Clinical examinations were ...
journal_title:Caries research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000262064
更新日期:1995-01-01 00:00:00
abstract::Effects of zinc and/or fluoride on growth, glycolysis and survival of Streptococcus mutans GS-5 were examined in vitro. Zinc inhibited growth and glycolysis, and enhanced the antimetabolic activity of fluoride. Zinc alone had little effect on cell survival. During cell growth without pH control a protection from cell ...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000261149
更新日期:1989-01-01 00:00:00
abstract::The problem of identifying potential determinants and predictors of dental caries is of key importance in caries research and it has received considerable attention in the scientific literature. From the methodological side, a broad range of statistical models is currently available to analyze dental caries indices (D...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000369831
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to test the relationship between a newly developed sugar index and caries experience in 4th- and 6th-graders. MATERIALS AND METHODS:A total of 1,019 fourth-graders and 925 sixth-graders from 2 regions in Northern Germany participated in the study. Caries experience was recorded by ...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000486102
更新日期:2019-01-01 00:00:00
abstract::This in situ study investigated the secondary caries development in dentin in gaps next to composite and amalgam. For 21 days, 14 volunteers wore a modified occlusal splint containing human dentin samples with an average gap of 215 µm (SD=55 µm) restored with three different materials: Filtek Supreme composite, Clearf...
journal_title:Caries research
pub_type: 杂志文章
doi:10.1159/000438728
更新日期:2015-01-01 00:00:00