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Effect of acid etching time and a self-etching adhesive on the shear bond strength of composite resin to porcelain 2006 Department of Prosthodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey. auguler@omu.edu.tr
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
The journal of adhesive dentistry
Periodical, Abbrev.
J.Adhes.Dent.
Pub Date Free Form
Feb
Volume
8
Issue
1
Start Page
21
Other Pages
25
Notes
JID: 100888552; 0 (Acrylic Resins); 0 (Adhesives); 0 (Composite Dental Resin); 0 (Composite Resins); 0 (Dentin-Bonding Agents); 0 (Polyurethanes); 12001-21-7 (Dental Porcelain); ppublish
Place of Publication
England
ISSN/ISBN
1461-5185; 1461-5185
Accession Number
PMID: 16536340
Language
eng
SubFile
Journal Article; D
DOI
Output Language
Unknown(0)
PMID
16536340
Abstract
PURPOSE The purpose of this study was to evaluate the effect of different acid etching times with 9.6% hydrofluoric acid gel and two adhesive systems on shear bond strengths of resin composite to porcelain. MATERIALS AND METHODS: Ninety-eight 7 x 7 x 2 mm feldspathic porcelain blocks (VMK 95, Vita) were prepared. The specimens were divided into 7 groups: 1 control (no surface treatment) and 6 groups acid etched with 9.6% hydrofluoric acid gel for different etching times, including 30 s, 30+30 s, 60 s, 60+60 s, 120 s, and 180 s. Each of the etching time groups was divided into two bonding agent (Single Bond, AdheSE) subgroups (n = 7). Microhybrid composite (Filtek Z250) was condensed using a teflon mold and light polymerized for 20 s on the porcelain specimens. The prepared specimens were then stored in distilled water at 37 degrees C for 24 h before mechanical testing. Shear testing of all groups was performed on a universal testing machine (Lloyd LRX) at a crosshead speed of 0.5 mm/min. The bond strength data were analyzed with two-way ANOVA. The means were compared using the Tukey HSD test (alpha = 0.05). RESULTS: Acid etching time and bonding agent statistically significantly influenced bond strength (p < 0.05). In the Single Bond group, the bond strengths between group 0 (10.48 MPa) and Group 30 (11.17 MPa) did not differ significantly, with these groups exhibiting the lowest bond strength values. The highest bond strength in Single Bond group was observed in group 120 (15.07 MPa) and group 60+60 (15.42 MPa), which did not differ significantly from each other. In the AdheSE group, the bond strengths of group 0 (9.33 MPa) and group 30 (9.49 MPa) did not differ significantly, and these groups exhibited the lowest bond strength values. The highest bond strengths in the AdheSE subgroup were observed in group 120 (14.84 MPa) and group 60+60 (14.96 MPa), which were not significantly different. Comparing the two different adhesive systems, Single Bond exhibited higher bond strength values than did the self-etching adhesive AdheSE. CONCLUSIONS: Acid etching of porcelain with 9.6% hydrofluoric acid gel for 120 s provided adequate bond strength for composite repair with a microhybrid composite. When a porcelain restoration is repaired with composite, Single Bond adhesive should be preferred to the AdheSE self-etching adhesive system.
Descriptors
Acid Etching, Dental/methods, Acrylic Resins/chemistry, Adhesives/chemistry, Composite Resins/chemistry, Dental Porcelain/chemistry, Dentin-Bonding Agents/chemistry, Materials Testing, Polyurethanes/chemistry, Shear Strength, Time Factors
Links
Book Title
Database
Publisher
Data Source
Authors
Guler,A. U., Yilmaz,F., Yenisey,M., Guler,E., Ural,C.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of altering the type of enamel conditioner on the shear bond strength of a resin-reinforced glass ionomer adhesive 2000 College of Dentistry, University of Iowa, Iowa City, IA 52242-1001, USA.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, its Constituent Societies, and the American Board of Orthodontics
Periodical, Abbrev.
Am.J.Orthod.Dentofacial Orthop.
Pub Date Free Form
Sep
Volume
118
Issue
3
Start Page
288
Other Pages
294
Notes
LR: 20131121; JID: 8610224; 0 (Acrylic Resins); 0 (Aluminum Silicates); 0 (Dentin-Bonding Agents); 0 (Fuji Ortho LC); 0 (Glass Ionomer Cements); 0 (Phosphoric Acids); 0 (Resin Cements); 135669-49-7 (Transbond); 454I75YXY0 (Bisphenol A-Glycidyl Methacrylat
Place of Publication
UNITED STATES
ISSN/ISBN
0889-5406; 0889-5406
Accession Number
PMID: 10982929
Language
eng
SubFile
Comparative Study; Journal Article; D; IM
DOI
S0889-5406(00)66280-7 [pii]
Output Language
Unknown(0)
PMID
10982929
Abstract
The purpose of this study was to determine the effects of changing the type of enamel conditioner on the shear bond strength of a resin-reinforced glass ionomer within half an hour after bonding the bracket to the tooth. Freshly extracted human molars were collected and stored in a solution of 0.1% (weight/volume) thymol. The teeth were cleaned and polished. The teeth were randomly separated into 4 groups according to the enamel conditioner/etchant and adhesive used: group I, teeth were conditioned with 10% polyacrylic acid and brackets were bonded with a resin-reinforced glass ionomer adhesive; group II, teeth were conditioned with 20% polyacrylic acid and brackets were bonded with a resin-reinforced glass ionomer adhesive; group III, teeth were etched with 37% phosphoric acid and the brackets were bonded with a resin-reinforced glass ionomer adhesive; group IV, teeth were etched with 37% phosphoric acid and the brackets were bonded with a composite adhesive. The results of the analysis of variance comparing the 4 experimental groups (F = 24.87) indicated the presence of significant differences between the groups (P =.0001). In general, the shear bond strengths were significantly greater in the 2 groups etched with 37% phosphoric acid. This was true for both the resin-reinforced glass ionomer (X = 6.1 +/- 2.7 MPa) and the composite (X = 5.2 +/- 2.9 MPa) adhesives. On the other hand, the shear bond strengths were significantly lower in the two groups conditioned with polyacrylic acid. The bond strength of the resin-reinforced glass ionomer adhesive conditioned with 10% polyacrylic acid (X = 0.4 +/- 1.0 MPa) was significantly lower than the group conditioned with 20% polyacrylic acid (&xmacr; = 3.3 +/- 2.6 MPa). The present findings indicated that the bond strength of the resin-reinforced glass ionomer adhesive can be significantly increased in the initial half hour after bonding if the enamel is etched with 37% phosphoric acid instead of being conditioned with either 10% or 20% polyacrylic acid. The clinician needs to take these properties into consideration when ligating the initial archwires.
Descriptors
Acid Etching, Dental/methods, Acrylic Resins, Aluminum Silicates, Analysis of Variance, Bisphenol A-Glycidyl Methacrylate, Chi-Square Distribution, Dental Bonding, Dental Enamel/drug effects, Dental Stress Analysis, Dentin-Bonding Agents, Glass Ionomer Cements, Humans, Orthodontic Brackets, Phosphoric Acids, Random Allocation, Resin Cements, Statistics, Nonparametric, Tensile Strength
Links
Book Title
Database
Publisher
Data Source
Authors
Bishara,S. E., Vonwald,L., Laffoon,J. F., Jakobsen,J. R.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of bleaching and repolishing procedures on coffee and tea stain removal from three anterior composite veneering materials 2004 School of Dentistry, Department of Restorative Dentistry and Endodontics, Ege University, Izmir, Turkey. sebnemturkun@hotmail.com
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ...[et al.]
Periodical, Abbrev.
J.Esthet.Restor.Dent.
Pub Date Free Form
Volume
16
Issue
5
Start Page
290
Other Pages
301; discussion 301-2
Notes
LR: 20131121; JID: 101096515; 0 (Clearfil ST); 0 (Coffee); 0 (Composite Resins); 0 (Esthet-X); 0 (Filtek A110 composite resin); 0 (Oxidants); 0 (Tea); BBX060AN9V (Hydrogen Peroxide); CIN: J Esthet Restor Dent. 2008;20(3):206-11. PMID: 18533984; ppublish
Place of Publication
Canada
ISSN/ISBN
1496-4155; 1496-4155
Accession Number
PMID: 15726798
Language
eng
SubFile
Comparative Study; Journal Article; D
DOI
Output Language
Unknown(0)
PMID
15726798
Abstract
Discolored teeth can be treated with resin veneers, but their color changes when confronted with staining solutions. Polishing procedures can provide a remedy for highly stained composites, but they tend to remove some materials as well. However, bleaching procedures are an effective, nondestructive method for solving the problem. The aim of this study was to compare the color change of three veneer composites exposed to staining solutions and to evaluate the effectiveness of a 15% hydrogen peroxide bleaching agent and three polishing systems to remove the stain. Forty-five disks (12 x 2 mm) each of Clearfil ST (Kuraray Co. Ltd., Osaka, Japan), Esthet-X (Dentsply/Caulk, Milford DE, USA), and Filtek A110 (3M ESPE, St. Paul, MN, USA) were prepared. The specimens were polished with Sof-Lex (3M ESPE), Enhance (Dentsply/Caulk), or PoGo (Dentsply/Caulk). Five specimens for each material-polishing system combination were immersed in coffee (Nescafe Classic, Nestle SA, Vevey, Switzerland) or tea (Earl Grey, Lipton, Blackfriars-London, England) for 7 days. The remaining disks were stored in water. Color measurements were made with a spectrophotometer (X-Rite Seroice SP78, Loaner, Koln, Germany) at baseline; after 1, 3, 5, and 7 days; and after bleaching and repolishing. After 1 week, one side of the specimens was bleached with Illumine-office (Dentsply De Trey GmbH, Konstanz, Germany) for 1 hour, and the other side was repolished for 30 seconds. All comparisons of color change for the polishing systems, times, and staining solutions were subjected to repeated measurements of analysis of variance. Paired t-test was used to examine whether significant color differences (deltaE*) occurred during immersion at the specified time intervals (p < or = .05). Filtek A110 was the least stained resin composite. Its color remained under a deltaE* value of 2 during the study. Clearfil ST exhibited the most color change after 1 week. All specimens polished with Enhance showed less staining, whereas those polished with the Sof-Lex system demonstrated the most color change. Water did not cause a variance in the deltaE*. There was no difference in the staining potential of coffee and tea. Bleaching and repolishing were effective in removing the stains. The resin composites tested reversed nearly to baseline color with the bleaching and to less than values at 1 day of staining with repolishing. The coffee and tea brands tested stained the composites used in this study equally. In-office bleaching was found to be more effective than repolishing in the restitution of the color. CLINICAL SIGNIFICANCE: The results of this study suggest that the discoloration of resin veneers can be partially removed by in-office bleaching and repolishing procedures.
Descriptors
Coffee, Composite Resins, Dental Polishing, Dental Veneers, Hydrogen Peroxide, Oxidants, Tea, Tooth Bleaching, Tooth Discoloration
Links
Book Title
Database
Publisher
Data Source
Authors
Turkun,L. S., Turkun,M.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of bleaching on staining susceptibility of resin composite restorative materials 2009 Baskent University, School of Dentistry, Department of Conservative Dentistry, 06490, Bahcelievler, Ankara, Turkey. ccivelek@hotmail.com
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ...[et al.]
Periodical, Abbrev.
J.Esthet.Restor.Dent.
Pub Date Free Form
Volume
21
Issue
6
Start Page
407
Other Pages
414
Notes
LR: 20131121; JID: 101096515; 0 (Aelite LS); 0 (CeramX); 0 (Coffee); 0 (Composite Resins); 0 (Dental Materials); 0 (Drug Combinations); 0 (Filtek Supreme); 0 (Oxidants); 0 (Peroxides); 0 (Tea); 059QF0KO0R (Water); 31PZ2VAU81 (carbamide peroxide); 8W8T1784
Place of Publication
England
ISSN/ISBN
1708-8240; 1496-4155
Accession Number
PMID: 20002929
Language
eng
SubFile
Comparative Study; Journal Article; Randomized Controlled Trial; D
DOI
10.1111/j.1708-8240.2009.00299.x [doi]
Output Language
Unknown(0)
PMID
20002929
Abstract
STATEMENT OF THE PROBLEM: Effect of bleaching procedures on staining susceptibility of resin restorative materials is still questionable. PURPOSE: The aim of this study was to evaluate the staining susceptibility of restorative materials bleached with 20% carbamide peroxide home bleaching agent and subsequently immersed in coffee and tea. MATERIALS AND METHODS: Forty-two disk-shaped specimens were fabricated for each of the resin composites (Filtek Supreme XT [3M ESPE, St. Paul, MN, USA], Ceram-X Mono [Dentsply, Konstanz, Germany], and Aelite All Purpose Body [BISCO, Inc., Shaumburg, IL, USA]). The baseline color values were measured with a spectrophotometer. The specimens of each restorative material were randomly divided into two groups (N = 21). While the first group specimens were stored in distilled water (nonbleaching group-control), bleaching agent (Opalescence PF 20% [Ultradent Poducts, South Jordan, UT, USA]) was applied on the top surface of each specimen of the second group (bleaching group). After color change values were measured, the specimens were randomly divided into three subgroups (N = 7) according to the staining solutions. The color change values (DeltaE*ab) were calculated and the data were subjected to analysis of variance. Statistical significance was declared if the p value was 0.05 or less. RESULTS: There was no statistically significant difference within each restorative material's DeltaE*ab values after bleaching (p = 0.714). Also, the staining solutions did not cause a statistically significant difference between DeltaE*ab values of bleaching compared with nonbleaching groups (p = 0.146). Significant interaction was found only between restorative materials and staining solutions (p = 0.000). CONCLUSION: Bleaching of the tested resin composites did not increase their susceptibility to extrinsic staining in vitro. CLINICAL SIGNIFICANCE Bleaching did not affect staining susceptibility of the tested resin composite restorative materials. (J Esthet Restor Dent 21:407-415, 2009).
Descriptors
Coffee, Color, Composite Resins/chemistry, Dental Materials/chemistry, Dental Restoration, Permanent, Drug Combinations, Humans, Materials Testing, Oxidants/chemistry, Peroxides/chemistry, Spectrophotometry, Surface Properties, Tea, Temperature, Time Factors, Tooth Bleaching/methods, Urea/analogs & derivatives/chemistry, Water/chemistry
Links
Book Title
Database
Publisher
Data Source
Authors
Celik,C., Yuzugullu,B., Erkut,S., Yazici,A. R.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of cadmium on the root and nodule ultrastructure of Alnus rubra 1980 Wickliff, Carlos, Environm. Prot. Agency, Terrestrial Syst. Div., Corvallis, Ore. 97330
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Environmental Pollution
Periodical, Abbrev.
Environ.Pollut.
Pub Date Free Form
1980/04
Volume
21
Issue
4
Start Page
287
Other Pages
306
Notes
Place of Publication
ISSN/ISBN
0269-7491
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Albus rubra (Bong.) was grown for three months in a greenhouse and given 0, 6, 12, 31 and 62 μg cadmium/litre of nitrogen-free nutrient solution for 11 weeks. Segments of nodules and secondary roots were collected from plants grown at the different Cd levels. Thin sections were made for transmission electron microscopy and the ultrastructure of root and nodule cells was then investigated. Endophyte resorption advanced in the nodules and the number of starch grains in root xylem parenchyma cells tripled as the cadmium concentration increased from 12 to 62 μg/litre of nutrient solution. Nucleoli increased in prominence in the nuclei of the root xylem parenchyma cells as the cadmium concentration in the nutrient solution was raised from 12 to 62 μg/litre. Observations of root and nodule cell ultrastructure of Albus rubra suggest that cadmium exerts its toxic effect in roots and nodules by decreasing the number of endophyte structures capable of fixing nitrogen and reducing the rate of respiration and growth by host plant cells.
Descriptors
cadmium, animal experiment, vascular plant, plant, plant root
Links
Book Title
Database
Embase
Publisher
Data Source
Embase
Authors
Wickliff,C., Evans,H. J.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of cessation interventions on hookah smoking: post-hoc analysis of a cluster-randomized controlled trial 2014
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Nicotine Tob Res
Periodical, Abbrev.
Nicotine Tob.Res.
Pub Date Free Form
Volume
16
Issue
6
Start Page
682
Other Pages
8
Notes
ID: 24376277
Place of Publication
ISSN/ISBN
Accession Number
Language
en
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
INTRODUCTION: We explored the differential effect of cessation interventions (behavioral support sessions with BSS+] and without BSS] bupropion) between hookah and cigarette smokers. METHODS: We reanalyzed the data from a major cluster-randomized controlled trial, ASSIST (Action to Stop Smoking In Suspected Tuberculosis), which consisted of 3 conditions: (a) behavioral support sessions (BSS), (b) behavioral support sessions plus 7 weeks of bupropion therapy (BSS+), and (c) controls receiving usual care. The trial originally recruited 1,955 adult smokers with suspected tuberculosis from 33 health centers in the Jhang and Sargodha districts of Pakistan between 2010 and 2011. The primary endpoint was continuous 6-month smoking abstinence, which was determined by carbon monoxide levels. Subgroup-specific relative risks (RRs) of smoking abstinence were computed and tested for differential intervention effect using log binomial regression (generalized linear model) between 3 subgroups (cigarette-only: 1,255; mixed: 485; and hookah-only: 215). RESULTS: The test result for homogeneity of intervention effects between the smoking forms was statistically significant (p-value for BSS+: .04 and for BSS: .02). Compared to the control, both interventions appeared to be effective among hookah smokers (RR = 2.5; 95% CI = 1.3-4.7 and RR = 2.2; 95% CI = 1.3-3.8, respectively) but less effective among cigarette smokers (RR = 6.6; 95% CI = 4.6-9.6 and RR = 5.8; 95% CI = 4.0-8.5), respectively. CONCLUSIONS: The differential intervention effects on hookah and cigarette smokers were seen (a) because the behavioral support intervention was designed primarily for cigarette smokers; (b) because of differences in demographic characteristics, behavioral, and sociocultural determinants; or (c) because of differences in nicotine dependency levels between the 2 groups.
Descriptors
Links
http://dx.doi.org/10.1093/ntr/ntt211
Book Title
Database
MEDLINE; http://www.globalhealthlibrary.net/
Publisher
Data Source
Authors
Dogar,Omara, Jawad,Mohammed, Shah,Sarwat K., Newell,James N., Kanaan,Mona, Khan,Muhammad A., Siddiqi,Kamran
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of cigarette design on biomarkers of exposure, puffing topography and respiratory parameters 2015 Altria Client Services Inc. , Richmond, VA , USA.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Inhalation toxicology
Periodical, Abbrev.
Inhal.Toxicol.
Pub Date Free Form
Feb
Volume
27
Issue
3
Start Page
174
Other Pages
180
Notes
LR: 20150729; JID: 8910739; 0 (Biomarkers); 6M3C89ZY6R (Nicotine); 9061-29-4 (Carboxyhemoglobin); OID: NLM: PMC4496805; OTO: NOTNLM; 2015/04/01 [aheadofprint]; ppublish
Place of Publication
England
ISSN/ISBN
1091-7691; 0895-8378
Accession Number
PMID: 25830813
Language
eng
SubFile
Journal Article; Randomized Controlled Trial; IM
DOI
10.3109/08958378.2015.1021980 [doi]
Output Language
Unknown(0)
PMID
25830813
Abstract
Despite the lack of evidence, many reports exist which have implied that smokers inhale low-yield cigarette smoke more deeply than that of high-yield cigarettes. The objective of this study was to investigate the effect of short-term switching between smoker's own brand and test cigarettes with different smoke yields on puffing topography, respiratory parameters and biomarkers of exposure. Participants were randomly assigned to smoke either a Test Cigarette-High Tar (TCH), for two days, and then switched to a Test Cigarette-Low Tar (TCL), for two days or the reverse order (n = 10 each sequence). Puffing topography (CReSS microdevice), respiratory parameters (inductive plethysmography) and biomarkers of exposure (BOE, urinary nicotine equivalents - NE and blood carboxyhemoglobin - COHb) were measured at baseline and on days 2 and 4. The average puffs per cigarette, puff volume and puff durations were statistically significantly lower, and inter-puff interval was significantly longer for the TCH compared to the TCL groups. Respiratory parameters were not statistically significantly different between the TCH and TCL groups. Post-baseline NE and COHb were statistically significantly lower in the TCL compared to the TCH groups. Under the conditions of this study, we found no indication of changes in respiratory parameters, particularly inhalation time and volume, between study participants smoking lower versus higher yield cigarettes. Likewise, the BOE provides no indication of deeper inhalation when smoking low- versus high-yield cigarettes. These findings are consistent with the published literature indicating smoking low-yield cigarettes does not increase the depth of inhalation.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Appleton,S., Liu,J., Lipowicz,P.J., Sarkar,M.
Original/Translated Title
URL
Date of Electronic
20150401
PMCID
PMC4496805
Editors
Effect of cigarette promotions on smoking uptake among adolescents 2000 Department of Pediatrics, Norris Cotton Cancer Center, Dartmouth Medical School, New Hampshire, USA. James.D.Sargent@Hitchcock.org
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Preventive medicine
Periodical, Abbrev.
Prev.Med.
Pub Date Free Form
Apr
Volume
30
Issue
4
Start Page
320
Other Pages
327
Notes
LR: 20130705; CI: Copyright 2000; GR: CA-23108/CA/NCI NIH HHS/United States; GR: CA-67538/CA/NCI NIH HHS/United States; GR: P30 CA023108/CA/NCI NIH HHS/United States; JID: 0322116; CIN: Prev Med. 2001 Nov;33(5):514-5. PMID: 11676594; ppublish
Place of Publication
UNITED STATES
ISSN/ISBN
0091-7435; 0091-7435
Accession Number
PMID: 10731461
Language
eng
SubFile
Journal Article; Research Support, U.S. Gov't, P.H.S.; IM
DOI
10.1006/pmed.1999.0629 [doi]
Output Language
Unknown(0)
PMID
10731461
Abstract
BACKGROUND: The purpose of this study was to evaluate the association between receptivity to cigarette promotions and smoking uptake in a cohort of adolescents. METHODS AND MEASURES: This was a prospective cohort study of 480 4th- to 11th-grade students conducted in three rural Vermont K-12 schools. Cigarette use was determined by self-report at baseline, 12 months (survey 2), and 21 months (survey 3). Proportional odds models were used to evaluate smoking uptake as a function of baseline measures of cigarette use, receptivity to cigarette promotions, and confounding factors, including grade, parental education, peer smoking, and family smoking. Adolescents were receptive to cigarette promotions if they owned or were willing to use a personal item bearing a cigarette brand logo [cigarette promotional item (CPI)]. Smoking status was measured using a 6-point ordinal index that combined experience and attitudes: 0 = never smoker/not susceptible to smoking, 1 = never smoker/susceptible to smoking, 2 = puffer (1 cigarette or less in lifetime), 3 = non-current experimenter (2-99 cigarettes in lifetime/none in past 30 days), 4 = current experimenter, and 5 = smoker (> or =100 cigarettes in lifetime). RESULTS: The 480 students were equally distributed across grade at baseline. Environmental exposure to smoking was high, and 30% were receptive to cigarette promotions at baseline. Higher levels on the smoking index at baseline were associated with higher grade in school, peer smoking, and receptivity to cigarette promotions. One hundred eighty-five students (38.5%) had moved to a higher category on the smoking index by survey 3, of whom 30 had become smokers. Receptivity to cigarette promotions at baseline was significantly associated with higher smoking uptake, with 48.7% of receptive students moving up one or more categories on the smoking index [adjusted proportional odds 1.9 (95% CI 1.3, 2.9)]. Acquisition of receptivity to cigarette promotions was also associated with increased smoking uptake, with those becoming receptive in surveys 2 or 3 having significantly higher odds of progression [3.6 (1.8, 7.0) and 2.9 (1.5, 5.5), respectively] compared with those who did not change. Conversely, those who were receptive at one point but became non-receptive in surveys 2 or 3 had lower odds of progression [0.4 (0.2, 0.9) and 0.5 (0.3, 1.1), respectively]. CONCLUSIONS: This study supports a close linkage between tobacco promotional activities and uptake of smoking among adolescents beyond baseline descriptions of receptivity to cigarette promotions. Over time, the likelihood of smoking uptake is increased when an adolescent acquires a CPI or becomes willing to use one and is decreased when an adolescent who owns a CPI loses it or becomes unwilling to use it. This provides strong evidence that elimination of cigarette promotional campaigns could reduce adolescent smoking.
Descriptors
Adolescent, Adolescent Behavior, Advertising as Topic, Cohort Studies, Data Collection, Female, Humans, Incidence, Male, New Hampshire/epidemiology, Odds Ratio, Plants, Toxic, Prospective Studies, Reproducibility of Results, Sex Distribution, Smoking/epidemiology, Tobacco
Links
Book Title
Database
Publisher
American Health Foundation and Academic Press
Data Source
Authors
Sargent,J. D., Dalton,M., Beach,M., Bernhardt,A., Heatherton,T., Stevens,M.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
Effect of cigarette smoking on periodontal status of healthy young adults 2000 Department of Oral Medicine and Periodontics, School of Dentistry, University of Seville, Spain.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of periodontology
Periodical, Abbrev.
J.Periodontol.
Pub Date Free Form
Jan
Volume
71
Issue
1
Start Page
73
Other Pages
78
Notes
LR: 20151119; JID: 8000345; ppublish
Place of Publication
UNITED STATES
ISSN/ISBN
0022-3492; 0022-3492
Accession Number
PMID: 10695941
Language
eng
SubFile
Comparative Study; Journal Article; D; IM
DOI
10.1902/jop.2000.71.1.73 [doi]
Output Language
Unknown(0)
PMID
10695941
Abstract
BACKGROUND: It has been shown that tobacco is a significant risk factor for periodontal disease; however, there have been few studies on young populations where problems of general health can be discounted. The purpose of this study was to examine the influence of tobacco consumption on the periodontal condition of a young, healthy population. METHODS: The study population consisted of 304 young Caucasian males (average age 19.38 +/- 0.72 years) entering the Armed Forces. All the subjects completed a self-administered questionnaire on age, oral hygiene habits, previous dental examinations, and quantity and length of tobacco use. The periodontal examination consisted of the plaque index (PI); periodontal bleeding index (PBI); probing depth (PD); and clinical attachment level (CAL). One- and 2-way ANOVA was used to compare data recorded between smokers and non-smokers. RESULTS: Forty-six percent of subjects reported that they brushed their teeth at least once a day, but only 13% visited a dentist at least once a year. Over half (53%) were habitual smokers, 43% smoking between 5 and 20 cigarettes per day; 39% of the smokers had been smoking for less than 5 years. Mean PI was 31.24 +/- 14.88 (27.19 +/- 15.93 for smokers and 35.78 +/- 12.17 for non-smokers), with significant differences between non-smokers and those who smoked 5 to 20 cigarettes per day (26.85 +/- 16.11, P<0.0001). Mean PBI was 42.29 +/- 8.43 (non-smokers 44.67 +/- 6.53 and smokers 40.17 +/- 9.46). Significant differences were found between the PBI of the non-smokers and of those who smoked 5 to 20 cigarettes per day (39.90 +/- 9.64, P <0.0001). There were also differences in the PBI between those who brushed their teeth once (40.53 +/- 9.61) and twice (44.86 +/- 5.9) a day (P<0.0001). Mean PD was 1.62 +/- 0.43 mm (non-smokers 1.56 +/- 0.36 and smokers 1.68 +/- 0.49). Deeper probing depths were recorded among smokers than among non-smokers, with statistically significant differences (P<0.049); statistically significant differences were also found between those who attended (1.49 +/- 0.50) and those who did not attend (1.65 +/- 0.42) regular dental check-ups (P<0.031). Mean CAL 1.75 +/- 0.41 (non-smokers 1.64 +/- 0.32 and smokers 1.82 +/- 0.44). CONCLUSIONS: It may be concluded that, even at such an early age, tobacco consumption affects the periodontal health. It is necessary to inform young smokers of the risk of tobacco use regarding periodontal health.
Descriptors
Adult, Age Factors, Analysis of Variance, Attitude to Health, Dental Care, Dental Plaque Index, Gingival Hemorrhage/classification, Health Behavior, Humans, Male, Military Personnel, Oral Hygiene, Periodontal Attachment Loss/classification, Periodontal Diseases/etiology, Periodontal Pocket/classification, Periodontium/physiopathology, Risk Factors, Smoking/adverse effects/physiopathology, Surveys and Questionnaires, Time Factors, Toothbrushing
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Machuca,G., Rosales,I., Lacalle,J. R., Machuca,C., Bullon,P.
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Effect of dentin primer on shear bond strength of composite resin to moist and dry enamel 2000 Section of Operative Dentistry, Department of Restorative Dentistry, Southern Illinois University-School of Dental Medicine, Alton, IL 62002, USA.
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Operative dentistry
Periodical, Abbrev.
Oper.Dent.
Pub Date Free Form
Jan-Feb
Volume
25
Issue
1
Start Page
51
Other Pages
58
Notes
LR: 20131121; JID: 7605679; 0 (Composite Resins); 0 (Dentin-Bonding Agents); 0 (Optibond); 0 (Resin Cements); 0 (Scotchbond Multi-Purpose); 0 (Z100 composite resin); 0 (single bond); 059QF0KO0R (Water); 454I75YXY0 (Bisphenol A-Glycidyl Methacrylate); 7631
Place of Publication
United States
ISSN/ISBN
0361-7734; 0361-7734
Accession Number
PMID: 11203791
Language
eng
SubFile
Comparative Study; Journal Article; D
DOI
Output Language
Unknown(0)
PMID
11203791
Abstract
The etched enamel-composite resin bond is the most reliable bond known to us. Moisture and dentin primers are the two most important variables that can interfere with this bond. This study investigated the effect of dentin primer on bond strengths of composite resin to moist and dry enamel. One hundred freshly extracted molar teeth were used for shear bond strength testing. The teeth were mounted in phenolic rings with an approximal enamel surface exposed. The exposed enamel surface on each tooth was flattened using 320- 400- and 600-grit silicon carbide papers and etched using 34-38% phosphoric acid gel. The teeth were then divided into 10 groups (n = 10). Four groups were assigned to each of the two dentin bonding systems, Scotchbond Multi-Purpose and OptiBond FL. Two groups were assigned to the single-bottle bonding agent (Single Bond). Each bonding system was tested on moist and dry enamel. OptiBond FL and Scotchbond MP were tested with and without the use of primer. All samples were thermocycled and tested in shear. Fracture analysis was performed using a binocular microscope. For scanning electron microscopy, approximal samples of enamel (1 mm thick) were flattened, etched, and bonded with and without primer on moist and dry enamel. A 1 mm-thick layer of Z100 was bonded to the specimens, which were then immersed in 10% HCl for 24 hours to dissolve the enamel. The specimens were viewed under a scanning electron microscope. Results indicated that the use of primer on dry enamel did not significantly affect (P > 0.05) shear bond strengths for the two bonding systems, Scotchbond MP (primed 24.10 +/- 4.83 MPa, unprimed 29.57 +/- 7.49 MPa) and OptiBond FL (primed 26.82 +/- 4.44, unprimed 25.66 +/- 2.95). However, the use of primer was found to be essential on moist enamel to obtain acceptable bond strengths with both Scotchbond MP (primed 25.61 +/- 10.29 MPa, unprimed 3.26 +/- 0.95 MPa) and OptiBond FL (primed 30.28 +/- 3.49 MPa, unprimed 8.37 +/- 3.31 MPa). Moisture on enamel did not significantly affect (P > 0.05) bond strengths for the single-bottle bonding agent, Single Bond (moist enamel 31.34 +/- 9.03 MPa, dry enamel 27.93 +/- 5.41 MPa). Fracture analysis revealed that most fractures were adhesive or mixed, with a greater percentage being cohesive for the groups with dry enamel or with primer on moist enamel. Scanning electron micrographs corroborated the shear bond strength data. The specimens without primer on moist enamel showed very poor penetration of adhesive and composite resin into the etched enamel microporosities.
Descriptors
Analysis of Variance, Bisphenol A-Glycidyl Methacrylate, Composite Resins, Dental Bonding, Dental Enamel/chemistry, Dental Enamel Permeability, Dental Stress Analysis, Dentin-Bonding Agents, Desiccation, Humans, Materials Testing, Microscopy, Electron, Scanning, Molar, Resin Cements, Silicon Dioxide, Statistics, Nonparametric, Tensile Strength, Water, Zirconium
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Jain,P., Stewart,G. P.
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