Abstract:
:The purpose of the study was to determine the exposure times needed to harden a light-activated composite cement through various thicknesses of porcelain. A negative exponential model was developed with which the relative hardness of a composite could be predicted from the product of the exposure time and the square root of the light intensity at 470 nm. Hardness data obtained by varying the exposure time and porcelain thickness were found to fit this model. A relationship was derived to predict the required exposure time, t, of a composite under porcelain with a transmission coefficient, Tc, and a thickness, l:t = toTc-1/2, where to is the exposure time of the composite alone.
journal_name
J Dent Resjournal_title
Journal of dental researchauthors
Chan KC,Boyer DBdoi
10.1177/00220345890680030801subject
Has Abstractpub_date
1989-03-01 00:00:00pages
476-80issue
3eissn
0022-0345issn
1544-0591journal_volume
68pub_type
杂志文章abstract::Two independent cross-over studies investigated the possibility of enhanced early enamel lesion remineralization with the use of chewing gum. The first study involved a sorbitol-containing chewing gum, and the second, which had an identical protocol, tested a sucrose-containing chewing gum. In each study, 12 volunteer...
journal_title:Journal of dental research
pub_type: 临床试验,杂志文章
doi:10.1177/00220345920710120801
更新日期:1992-12-01 00:00:00
abstract::Biological mediators have been used to enhance periodontal regeneration. The aim of this prospective randomized controlled study was to evaluate the safety and effectiveness of 3 doses of fibroblast growth factor 2 (FGF-2) when combined with a β-tricalcium phosphate (β-TCP) scaffold carrier placed in vertical infrabon...
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abstract::Mandibular prognathism is a common dentofacial phenotype with a substantial genetic component; however, few susceptibility loci have been mapped. Ethnicity is a risk factor for mandibular prognathism, and a relatively high prevalence is observed in Asian populations. The hypothesis of this study suggested that a speci...
journal_title:Journal of dental research
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doi:10.1177/0022034510382546
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abstract::Periodontitis is a complex, multifactorial chronic disease involving continuous interactions among bacteria, host immune/inflammatory responses, and modifying genetic and environmental factors. More than any other cytokine family, the interleukin (IL)-1 family includes key signaling molecules that trigger and perpetua...
journal_title:Journal of dental research
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doi:10.1177/0022034520945209
更新日期:2020-12-01 00:00:00
abstract::Inferior alveolar nerve (IAN) injury induces persistent ectopic pain which spreads to a wide area in the orofacial region. Its exact mechanism remains unclear. We investigated the involvement of nitric oxide (NO) in relation to ectopic orofacial pain caused by IAN transection (IANX). We assessed the changes in mechani...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/0022034513509280
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abstract::Obesity is a widespread chronic inflammatory disorder characterized by an increased overall disease burden and significant association with periodontitis. The aim of this prospective clinical cohort study was to investigate the effect of obesity on orthodontic tooth movement. Fifty-five adolescent patients (27 males, ...
journal_title:Journal of dental research
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doi:10.1177/0022034516688448
更新日期:2017-05-01 00:00:00
abstract::Oral bacteria, including Streptococcus mutans and Streptococcus salivarius, contribute to tooth decay and plaque formation; therefore, it is essential to develop strategies to prevent dental caries and plaque formation. We recently showed that organo-selenium compounds covalently attached to different biomaterials inh...
journal_title:Journal of dental research
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abstract::Dental plaque collected from the label aspect of the anterior dentition of children harbored Neisseria that synthesized an extracellular iodophilic polysaccharide (EIP) from sucrose. Gas chromatograms of fully-acetylated EIP derivatives indicated that glucose (97%) and galactose (3%) were the only monosaccharide const...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345820610050101
更新日期:1982-05-01 00:00:00
abstract::The effects of demineralized dentin and bone matrix on dental ectomesenchymal cells were evaluated after observation periods of two or three weeks. Autogenous dentin and bone matrix, obtained from the crowns of primary molars or maxillary cortical bone, respectively, were demineralized with 3% acetic acid and implante...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345900690011301
更新日期:1990-01-01 00:00:00
abstract::Porcine dentin sialophosphoprotein (DSPP) is the most abundant non-collagenous protein in dentin. It is processed by proteases into 3 independent proteins: dentin sialoprotein (DSP), dentin glycoprotein (DGP), and dentin phosphoprotein (DPP). We fractionated DPP and DSP along with TGF-β activity by ion exchange (IE) c...
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更新日期:2014-07-01 00:00:00
abstract::The human patched gene (PTCH) functions in both embryologic development and tumor suppression. PTCH mutations have been found in odontogenic keratocysts. However, the expression and localization of the protein product of the gene have not been determined in odontogenic tumors and cysts. We investigated 68 odontogenic ...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/0810757
更新日期:2002-11-01 00:00:00
abstract::Previous investigations have shown a clear association between the presence of the enzyme aspartate aminotransferase (AST) in gingival crevicular fluid (GCF) and clinical evidence of periodontal disease in humans, as well as in the beagle dog model. This paper describes a 26-week study that uses the beagle dog model o...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345910700061501
更新日期:1991-06-01 00:00:00
abstract::Previously, we reported that the rate (R) of hydroxyapatite dissolution in acetic, lactic, and phosphoric acid solutions is a function of the degree of saturation with respect to the dissolving mineral, DS (defined as the ratio of the mean ionic activity product for hydroxyapatite [Ca5OH(PO4)3] in solution to its solu...
journal_title:Journal of dental research
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doi:10.1177/00220345990780070701
更新日期:1999-07-01 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::Insulin resistance is one of the critical pathogeneses of type 2 diabetes mellitus (T2DM). Elevated levels of plasma branched-chain amino acids (BCAAs) are associated with insulin resistance. Recent studies have demonstrated the role of Porphyromonas gingivalis in the development of insulin resistance. However, the me...
journal_title:Journal of dental research
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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
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doi:10.1177/154405910608501007
更新日期:2006-10-01 00:00:00
abstract::Hemifacial microsomia (HFM) is a congenital disorder marked by facial asymmetry. Whether facial asymmetry accounts for asymmetrical dental development is unknown. There are few data on dental development relative to mandibular development or severity of HFM, or on development over time. We hypothesized that when mandi...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/0022034510378425
更新日期:2010-12-01 00:00:00
abstract::Numerous studies have demonstrated that many older adults have problems chewing, pain, difficulties in eating, and problems in social relationships because of oral disorders. However, it is not clear if these functional and psychosocial outcomes affect broader psychological well-being and life satisfaction. Consequent...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345000790041301
更新日期:2000-04-01 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::A simple in vitro method has been described for quantitatively measuring the rate at which isotopically labeled substances permeate through dentin in occlusal cavity preparations. The presence or absence of pulp tissue had only a minor effect on the kinetics of permeation. As the dentin was made thinner there was a re...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345770560011601
更新日期:1977-01-01 00:00:00
abstract::Schoolchildren residing in a fluoride-deficient area were provided either a sodium fluoride (0.1% F) or a nonfluoride dentifrice for home use. About half the children provided each type of dentifrice were also given an initial prophylaxis. Combining the data with regard to the type of dentifrice indicated that the sod...
journal_title:Journal of dental research
pub_type: 临床试验,杂志文章
doi:10.1177/00220345750540013601
更新日期:1975-01-01 00:00:00
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. ...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345850640100501
更新日期:1985-10-01 00:00:00
abstract::The intent of this article is to review the numerous factors that affect the mechanical properties of particle- or fiber-filler-containing indirect dental resin composite materials. The focus will be on the effects of degradation due to aging in different media, mainly water and water and ethanol, cyclic loading, and ...
journal_title:Journal of dental research
pub_type: 杂志文章,评审
doi:10.1177/154405910808700802
更新日期:2008-08-01 00:00:00
abstract::Recent functional animal studies have reported that the motor control of masticatory muscle function is bilaterally guided by both hemispheres, which may fundamentally differ from the cortical control of limb muscle function. In this study, we investigated whether unilateral cortical brain infarction induces different...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345990780120701
更新日期:1999-12-01 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
abstract::Catecholamines are present in saliva, but their influence on oral epithelium is not understood. Because psychological stress increases salivary catecholamines and impairs oral mucosal wound healing, we sought to determine if epithelial adrenergic signaling could link these two findings. We found that cultured human or...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/0022034510388034
更新日期:2011-02-01 00:00:00
abstract::The oral microbiome consists of a planktonic microbiome residing in saliva and an adhering microbiome (the biofilm adhering to oral hard and soft tissues). Here we hypothesized that possible differences in microbial composition of the planktonic and adhering oral microbiome on teeth can be related to the forces by whi...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/0022034513511822
更新日期:2014-01-01 00:00:00
abstract::Thermal diffusivity, a property related to the thermal insulative efficiency of a material, was measured in nine glass-ionomer cements and compared with results from a silicate and a polycarboxylate cement. Each cement was mixed at various powder-liquid ratios (P/L) and moulded into a rectangular prism of approximate ...
journal_title:Journal of dental research
pub_type: 杂志文章
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更新日期:1987-05-01 00:00:00
abstract::This study demonstrated a correlation between silicon x-ray counts and area fractions of adherent porcelain as determined by point-counting. This correlation has allowed a method to be devised for measuring area fractions of porcelain adherent to porcelain-fused-to-metal (PFM) fracture surfaces. The described method, ...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345830620081801
更新日期:1983-08-01 00:00:00
abstract::The dimensional accuracy of porcelain fused to metal crown and bridge castings was determined on truncated cone-shaped steel dies. Ni-Cr castings produced in manufacturers' laboratories were consistently undersize, while precious metal castings were consistently oversize. Ni-Cr castings, produced in NBS laboratories u...
journal_title:Journal of dental research
pub_type: 杂志文章
doi:10.1177/00220345790580120501
更新日期:1979-12-01 00:00:00