Abstract：
:Contact angle measurements on layers of bacteria were used to determine the bacterial surface free energy (gamma b) of a variety of oral streptococcal strains, both without and after being coated with human whole saliva. At least four isolates of each species, either freshly isolated or laboratory strains, were used. The species Streptococcus mutans, S. sanguis, and S. salivarius were homogeneous, having high surface free energies, and were not affected by saliva treatment (gamma b = 106 +/- 12 and 107 +/- 10 erg X cm-2 in the absence and presence of saliva coating, respectively; n = 20). S. mitis had a very low surface free energy (46 +/- 15; n = 5), which was significantly increased after salivary adsorption (71 +/- 14 erg X cm-2; p less than 0.002). The species S. milleri contained strains with both high and low gamma b. Calculation of the interfacial free energy of adhesion (delta F adh) for bacteria from a saliva suspension to solid surfaces with various arbitrary surface free energies (gamma s) showed that, theoretically, most strains will encounter thermodynamically favorable conditions for adhesion to surfaces with a gamma s above 62 erg X cm-2. However, S. mitis strains not coated with saliva would only be able to adhere to surfaces with gamma s lower than this value. Saliva-coating reverses the calculated relationship with gamma s for these strains. The results indicate that an enamel surface with a low gamma s value would be thermodynamically unfavorable for adhesion of most oral streptococci.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Weerkamp AH,van der Mei HC,Busscher HJdoi
10.1177/00220345850640100501subject
Has Abstractpub_date
1985-10-01 00:00:00pages
1204-10issue
10eissn
0022-0345issn
1544-0591journal_volume
64pub_type
杂志文章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：:Cell therapies utilizing mesenchymal stem cells (MSCs) could overcome limitations of traditional treatments for reconstructing craniofacial tissues. This large-scale study explored a standardized methodology for the isolation and clinical-scale expansion of alveolar bone marrow-derived MSCs (aBMSCs). We harvested 103 ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513510530
更新日期：2014-01-01 00:00:00
abstract：:The accumulated posteruptive tooth age was calculated for 212 children with Down's syndrome and 124 of their unaffected sibs. Posteruptive tooth age was shown to vary widely with different morphological permanent tooth types at the same chronological age. Girls in both groups had greater accumulated posteruptive tooth...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345750540033001
更新日期：1975-05-01 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：:Priming with tumor antigens is one of the most important strategies in cancer immunotherapy. To enhance tumor antigenicity, OK-432, a streptococcal preparation, was coupled to squamous cell carcinoma (KLN-205) by means of a 0.2% glutaraldehyde method. The purpose of this study was to investigate whether OK-432-conjuga...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910308200813
更新日期：2003-08-01 00:00:00
abstract：:The recent bioengineering of complex tooth structures from pig tooth bud tissues suggests the potential for the regeneration of mammalian dental tissues. We have improved tooth bioengineering methods by comparing the utility of cultured rat tooth bud cells obtained from three- to seven-day post-natal (dpn) rats for to...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910408300703
更新日期：2004-07-01 00:00:00
abstract：:Occlusal alterations may result in changes in the functional performance of masticatory muscles. In this study, we set up an experimental model in rats to examine whether masticatory muscle abnormalities occur after a malocclusion is induced. Rats underwent unilateral amputation of the molar cusps to simulate an occlu...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345990780111101
更新日期：1999-11-01 00:00:00
abstract：:This study indicated that a clear relationship exists between silicon and fluoride. We have also demonstrated a probable surface enamel silicon effect that increases fluoride uptake. The complex set of relationships described in the surface chemistry of calcium, tin, and zirconium with fluoride, hydroxide, phosphate, ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550050601
更新日期：1976-09-01 00:00:00
abstract：:Pain and discomfort are common problems for patients undergoing orthodontic treatment. We have demonstrated that cortical excitation propagation in the somatosensory and insular cortices (IC) induced by electrical stimulation of the periodontal ligament (PDL) is facilitated 1 d after experimental tooth movement (ETM)....
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034520962465
更新日期：2020-10-08 00:00:00
abstract：:Dental porcelains rely on the high-thermal-expansion mineral leucite to elevate their bulk thermal expansion to levels compatible with dental PFM alloys. The microcracks that form around these leucite particles when cooled during porcelain manufacture are a potential source of change in bulk porcelain thermal expansio...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345960750070801
更新日期：1996-07-01 00:00:00
abstract：:Loss of hybrid layer integrity compromises resin-dentin bond stability. Matrix metalloproteinases (MMPs) may be partially responsible for hybrid layer degradation. Since chlorhexidine inhibits MMPs, we hypothesized that chlorhexidine would decelerate the loss of resin-dentin bonds. Class I preparations in extracted th...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/154405910708600115
更新日期：2007-01-01 00:00:00
abstract：:Remineralization of demineralized dentin lesions adjacent to glass-ionomer cements (GICs) has been reported in the literature. This study tested the hypothesis that a strontium-based GIC can remineralize completely demineralized dentin by nucleation of new apatite crystallites within an apatite-free dentin matrix. Hum...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034509357172
更新日期：2010-03-01 00:00:00
abstract：:Dimensional alterations of the facial bone wall following tooth extractions in the esthetic zone have a profound effect on treatment outcomes. This prospective study in 39 patients is the first to investigate three-dimensional (3D) alterations of facial bone in the esthetic zone during the initial 8 wks following flap...
journal_title：Journal of dental research
pub_type： 临床试验,杂志文章
doi：10.1177/0022034513506713
更新日期：2013-12-01 00:00:00
abstract：:Patients with restorations cemented with a reinforced zinc oxide-eugenol cement and a zinc phosphate cement were recalled after a four- to seven-year interval. No significant differences in clinical success were observed between restoration luted with the two cements. No significant difference in the incidence of cari...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345760550022201
更新日期：1976-03-01 00:00:00
abstract：:In this study, we analyzed the influence of prosthetic abutment height on marginal bone loss (MBL) around implants in the posterior maxilla. In this retrospective cohort study, the radiographically determined MBL was related to the height of the abutments of internal conical connection implants at 6 and 18 months post...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034513519800
更新日期：2014-07-01 00:00:00
abstract：:Better understanding of dental caries and other oral conditions has guided new strategies to prevent disease and manage its consequences at individual and public health levels. This article discusses advances in prevention and minimal intervention dentistry over the last century by focusing on some milestones within s...
journal_title：Journal of dental research
pub_type： 历史文章,杂志文章
doi：10.1177/0022034519837252
更新日期：2019-06-01 00:00:00
abstract：:Zirconia-based restorations often fracture from chipping and/or delamination of the porcelain veneers. We hypothesized that veneer chipping/delamination is a result of the propagation of near-contact-induced partial cone cracks on the occlusal surface under mastication. Masticatory loading involves the opposing tooth ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/154405910808701210
更新日期：2008-12-01 00:00:00
abstract：:A double-blind randomized clinical trial was performed in 6- to 7-yr-old schoolchildren to evaluate, in a 30-mo period, whether the caries increment on the distal surface of the second primary molars adjacent to permanent first molars sealed with fluoride release compounds would be lower with respect to those adjacent...
journal_title：Journal of dental research
pub_type： 杂志文章,随机对照试验
doi：10.1177/0022034514535808
更新日期：2014-07-01 00:00:00
abstract：:Dental caries is initiated by demineralization of the tooth surface through acid production by sugar metabolism of supragingival plaque microflora. To elucidate the sugar metabolic system, we used CE-MS to perform metabolomics of the central carbon metabolism, the EMP pathway, the pentose-phosphate pathway, and the TC...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034510377792
更新日期：2010-12-01 00:00:00
abstract：:The etiology and pathogenesis of craniofacial birth defects are multifactorial and include both genetic and environmental factors. Despite the identification of numerous genes associated with congenital craniofacial anomalies, our understanding of their etiology remains incomplete, and many affected individuals have a...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034520969109
更新日期：2020-11-06 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：:Iodoacetate at 10(-3) M and 10(-4) M concentrations was found to strongly inhibit incorporation of both 14C-choline and 3H-inositol into phospholipids of calvaria from newborn rats; it had somewhat less effect on ethanolamine incorporation and almost no effect on serine incorporation. Similar though less dramatic resu...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345750540050101
更新日期：1975-09-01 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：:ATP-degrading enzyme activities in pulps of healthy and carious human teeth were quantitatively analyzed using the bioluminescence method. The patterns of both Ca2+- and MG2+-activated ATP hydrolysis resembled each other. Increased enzyme activities were observed during injured states. ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345810600020601
更新日期：1981-02-01 00:00:00
abstract：:Periodontal inflammation and alveolar bone remodeling during orthodontic tooth movement are considered regional reactions. However, how systemic immune responses are involved in this regional reaction remains unclear. In this study, we explored the systemic effects of orthodontic force by focusing on the mononuclear p...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/0022034515592868
更新日期：2015-09-01 00:00:00
abstract：:The fluid in and gingival tissue lining periodontal pockets were collected from male patients undergoing periodontal therapy. The collagenolytic activity of the crevicular fluid, and the ability of the gingiva in culture to degrade (a) an exogenous collagen substrate, and (b) endogenous collagen newly synthesized and ...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345790580111601
更新日期：1979-11-01 00:00:00
abstract：:A sintered hydroxyapatite (HAP) ceramic for use in wear studies was prepared from a commercial tricalcium phosphate. The sintered HAP had physical properties close to those of human enamel. The coefficient of friction and wear of the sintered HAP ceramic as characterized by tangential force, track width, and surface f...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345780570070401
更新日期：1978-07-01 00:00:00
abstract：:A study was made of the hydration of dental cements, water being classified as "non-evaporable" and "evaporable". The ratio of these two types of water was found to vary greatly among different cement types, being lesser in zinc oxide and ionic polymer cements and greater in ion-leachable glass and phosphoric acid cem...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345790580030701
更新日期：1979-03-01 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：:The cacao bean husk has been shown to possess two types of cariostatic substances, one showing anti-glucosyltransferase (GTF) activity and the other antibacterial activity, and to inhibit experimental dental caries in rats infected with mutans streptococci. In the present study, chromatographic purification revealed h...
journal_title：Journal of dental research
pub_type： 杂志文章
doi：10.1177/00220345010800111001
更新日期：2001-11-01 00:00:00
