WTS database

Title	Pub Year	Author	SearchLink Sort ascending
An example of measurement and reporting of periodontal loss of attachment (LOA) in epidemiological studies: smoking and periodontal tissue destruction	1999	Department of Oral Rehabilitation, School of Dentistry, University of Otago, Dunedin.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The New Zealand dental journal Periodical, Abbrev. N.Z.Dent.J. Pub Date Free Form Dec Volume 95 Issue 422 Start Page 118 Other Pages 123 Notes LR: 20061115; JID: 0401065; ppublish Place of Publication NEW ZEALAND ISSN/ISBN 0028-8047; 0028-8047 Accession Number PMID: 10687377 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; D; IM DOI Output Language Unknown(0) PMID 10687377 Abstract The measurement and reporting of periodontal disease in epidemiological studies can be complex, with the common indices having well-recognised shortcomings. The aim of this study was to illustrate the use of the periodontal loss of attachment (LOA) approach in investigating the association between cigarette smoking and loss of periodontal attachment in a convenience sample of adults, in order to determine whether or not smoking was a risk indicator for periodontal disease. All participants were given a detailed periodontal clinical examination in two randomly assigned contralateral diagonal quadrants, with LOA measurements made at six sites per tooth. Information was also collected on participants' socio-demographic characteristics, oral hygiene practices, smoking history, and attitudes towards smoking. The 240 participants examined comprised 81 current smokers (CS), 79 former smokers (FS) and 80 nonsmokers (NS). Substantial differences and a gradient in disease existed for LOA among the three groups. CS exhibited the greatest (and NS the least) prevalence, extent, and severity of LOA. CS had more plaque and calculus than either of the other two groups, but the groups did not differ with respect to bleeding on probing. Overall, smoking was associated with the disease outcome, and this persisted after potential confounders were controlled using multivariate analysis. Although the observed differences may have been due to the self-selected nature of the sample, the gradient evident across the three smoking exposure groups suggests that smoking cessation can slow the progression of the disease. The LOA approach appears to be a versatile and informative method for recording, analysing, and presenting data on periodontitis in epidemiological studies. Descriptors Adult, Analysis of Variance, Attitude to Health, Chi-Square Distribution, Confounding Factors (Epidemiology), Dental Calculus/epidemiology, Dental Plaque/epidemiology, Disease Progression, Epidemiologic Studies, Female, Gingival Hemorrhage/epidemiology, Humans, Logistic Models, Male, Middle Aged, Multivariate Analysis, New Zealand/epidemiology, Oral Hygiene/statistics & numerical data, Periodontal Attachment Loss/epidemiology, Periodontal Index, Periodontitis/epidemiology, Prevalence, Risk Factors, Smoking/epidemiology, Smoking Cessation, Social Class Links Book Title Database Publisher Data Source Authors Paidi,S., Pack,A. R., Thomson,W. M. Original/Translated Title URL Date of Electronic PMCID Editors
Prospective evaluation of the prevalence of gastric Helicobacter pylori infection in patients with GERD, Barrett's esophagus, Barrett's dysplasia, and Barrett's adenocarcinoma	2000	Veterans Administration Medical Center, Kansas City, Missouri, 64128, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The American Journal of Gastroenterology Periodical, Abbrev. Am.J.Gastroenterol. Pub Date Free Form Feb Volume 95 Issue 2 Start Page 387 Other Pages 394 Notes LR: 20131121; JID: 0421030; 0 (Coloring Agents); 0 (Enzyme Inhibitors); 0 (Proton Pump Inhibitors); ppublish Place of Publication UNITED STATES ISSN/ISBN 0002-9270; 0002-9270 Accession Number PMID: 10685740 Language eng SubFile Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; IM DOI S0002-9270(99)00817-5 [pii] Output Language Unknown(0) PMID 10685740 Abstract OBJECTIVE: This study was undertaken to prospectively determine the prevalence of gastric H. pylori infection in Barrett's esophagus and Barrett's complicated by dysplasia or adenocarcinoma. METHODS: The prevalence of H. pylori was determined in Barrett's esophagus patients compared to a control population of patients with gastroesophageal reflux disease (GERD) only. All patients had a minimum of 10 gastric surveillance biopsies obtained. H. pylori colonization was determined upon the basis of hematoxylin and eosin and use of a modified Giemsa and or Steiner's silver stain of all gastric biopsy specimens. RESULTS: Two hundred and eighty-nine Barrett's patients and 217 GERD control patients were included in the study. H. pylori was found in 95/289 (32.9%) of the Barrett's patients, compared with 96/217 (44.2%) of the GERD controls (NS). Forty-seven of the Barrett's patients had low-grade dysplasia/indefinite dysplasia, 14 high-grade dysplasia, and 20 Barrett's adenocarcinoma. When Barrett's was subgrouped according to absence of dysplasia, and presence of low-grade dysplasia, high-grade dysplasia, or adenocarcinoma, H. pylori prevalence was found to be significantly less for patients with Barrett's high-grade dysplasia (14.3%) and adenocarcinoma (15.0%) versus patients with GERD alone (44.2%), Barrett's alone (35.1%), or Barrett's with low-grade dysplasia (36.2%) (p = 0.016). This difference could not be explained by differences between Barrett's esophagus patients infected with H. pylori and those who were not with respect to gender, smoking history, alcohol consumption, use of proton pump inhibitor, or length of Barrett's mucosa. CONCLUSIONS: Barrett's high-grade dysplasia and adenocarcinoma are significantly more prevalent in patients who are not infected with H. pylori. H. pylori appears to have a protective effect against the development of Barrett's adenocarcinoma. Descriptors Adenocarcinoma/epidemiology/microbiology, Alcohol Drinking/epidemiology, Analysis of Variance, Barrett Esophagus/epidemiology/microbiology/pathology, Biopsy, Chi-Square Distribution, Coloring Agents, Enzyme Inhibitors/therapeutic use, Esophageal Neoplasms/epidemiology/microbiology, Esophagoscopy, Female, Follow-Up Studies, Gastroesophageal Reflux/drug therapy/epidemiology/microbiology, Helicobacter Infections/epidemiology, Helicobacter pylori/growth & development, Humans, Kansas/epidemiology, Male, Middle Aged, Prevalence, Prospective Studies, Proton Pump Inhibitors, Smoking/epidemiology, Stomach Diseases/epidemiology/microbiology Links Book Title Database Publisher Data Source Authors Weston,A. P., Badr,A. S., Topalovski,M., Cherian,R., Dixon,A., Hassanein,R. S. Original/Translated Title URL Date of Electronic PMCID Editors
A trial to determine the risk of decompression sickness after a 40 feet of sea water for 200 minute no-stop air dive	2000	Naval Medical Research Institute, Bethesda, MD, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Aviation, Space, and Environmental Medicine Periodical, Abbrev. Aviat.Space Environ.Med. Pub Date Free Form Feb Volume 71 Issue 2 Start Page 102 Other Pages 108 Notes LR: 20061115; JID: 7501714; ppublish Place of Publication UNITED STATES ISSN/ISBN 0095-6562; 0095-6562 Accession Number PMID: 10685581 Language eng SubFile Case Reports; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; IM; S DOI Output Language Unknown(0) PMID 10685581 Abstract BACKGROUND: The USN93 probabilistic model of decompression sickness (DCS) predicts a DCS risk of 3.9% after a 40 ft of seawater (fsw) for 200 min no-stop air dive, although little data is available to evaluate the accuracy of this prediction. Based on an analysis of Navy Safety Center data from diving on U.S. Navy standard air decompression tables, the observed incidence of DCS for this type of dive is 0.11%. Knowing the true incidence of the dive is important for deciding whether or not to adopt proposed probability based decompression procedures for U.S. Navy diving. HYPOTHESIS: The risk of DCS after a 40 fsw for 200 min no-stop air dive is 3.9%. METHODS: We conducted a closed sequential trial to determine the DCS incidence on this dive. RESULTS: Of 30 military divers who completed 91 dives, there were 2 cases of DCS (2.2%, 95% CI: 0.27 7.7%). The study was terminated early after the second DCS case because of the presence of neurological symptoms and signs. CONCLUSIONS: This study demonstrates that the incidence of DCS in a laboratory setting is higher than observed in fleet diving. Use of the 40 fsw for 200 min schedule in a decompression computer is likely to result in DCS incidence 2.5- to 70-fold greater than that observed in U.S. Navy diving using table-based procedures. Descriptors Adult, Algorithms, Body Height, Body Weight, Decompression Sickness/etiology, Diving/adverse effects, Humans, Incidence, Male, Military Personnel, Models, Biological, Monte Carlo Method, Naval Medicine, Predictive Value of Tests, Reproducibility of Results, Risk Factors, Seawater, Time Factors, United States Links Book Title Database Publisher Data Source Authors Ball,R., Parker,E. C. Original/Translated Title URL Date of Electronic PMCID Editors
Determination of polycyclic aromatic hydrocarbons in sediment using solid-phase microextraction with gas chromatography-mass spectrometry	2000	Environmental Research Center Montecatini, Marina di Ravenna, Italy.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of chromatographic science Periodical, Abbrev. J.Chromatogr.Sci. Pub Date Free Form Feb Volume 38 Issue 2 Start Page 55 Other Pages 60 Notes LR: 20061115; JID: 0173225; 0 (Indicators and Reagents); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Solutions); 0 (Water Pollutants, Chemical); ppublish Place of Publication UNITED STATES ISSN/ISBN 0021-9665; 0021-9665 Accession Number PMID: 10677833 Language eng SubFile Journal Article; IM DOI Output Language Unknown(0) PMID 10677833 Abstract Manual solid-phase microextraction (SPME) coupled with gas chromatography-mass spectrometry (GC-MS) is applied for the determination of polycyclic aromatic hydrocarbons (PAHs) from natural matrix through a distilled water medium. Seven of the 16 PAH standards (naphthalene, acenaphthene, fluorene, anthracene, fluoranthene, pyrene, benzo[a]anthracene) are spiked on a marine muddy sediment. The samples, containing PAHs in the range of 10-20 ppm, are then aged at room temperature more than 10 days before analysis. The influence of the matrix, SPME adsorption time, pH, salt content, and SPME adsorption temperature are investigated. The reproducibility of the technique is less than 13% (RDS) for the first 6 considered PAHs and 28% (RDS) for benzo(a)anthracene with a fiber containing a 100-micron poly dimethylsiloxane coating. Linearity extended in the range of 5-50 picograms for PAHs direct injection, 5-70 picograms for PAHs in water, and 1-170 picograms for PAHs in sediment. The detection limit is estimated less than 1 microgram/kg of dry sample for the first 6 considered PAHs in sediment and 1.5 micrograms/kg of dry sample for benzo(a)anthracene using the selected ion monitoring mode in GC-MS. The recoveries of the considered PAHs are evaluated. Descriptors Adsorption, Calibration, Gas Chromatography-Mass Spectrometry, Hydrogen-Ion Concentration, Indicators and Reagents, Italy, Polycyclic Hydrocarbons, Aromatic/analysis, Solutions, Temperature, Water Pollutants, Chemical/analysis Links Book Title Database Publisher Data Source Authors Cam,D., Gagni,S., Meldolesi,L., Galletti,G. Original/Translated Title URL Date of Electronic PMCID Editors
In vitro shear bond strength of adhesive to normal and fluoridated enamel under various contaminated conditions	1999	Department of Conservative Dentistry, Istanbul University, Faculty of Dentistry, Capa, Turkey. benderli@istanbul.edu.tr	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Quintessence international (Berlin, Germany : 1985) Periodical, Abbrev. Quintessence Int. Pub Date Free Form Aug Volume 30 Issue 8 Start Page 570 Other Pages 575 Notes LR: 20131121; JID: 0342677; 0 (Composite Resins); 0 (Dentin-Bonding Agents); 0 (Maleates); 0 (Phosphoric Acids); 0 (Resin Cements); 0 (Saliva, Artificial); 0 (Scotchbond Multi-Purpose); 0 (Z100 composite resin); 059QF0KO0R (Water); 7631-86-9 (Silicon Diox Place of Publication ENGLAND ISSN/ISBN 0033-6572; 0033-6572 Accession Number PMID: 10635272 Language eng SubFile Comparative Study; Journal Article; D DOI Output Language Unknown(0) PMID 10635272 Abstract OBJECTIVE: This study examined the shear bond strength of bonding agents to normal or fluoridated enamel following use of weak or strong acids to prepare enamel surfaces and after contamination with a measured amount of saliva at various stages of the bonding procedure. METHOD AND MATERIALS: One hundred extracted human third molar teeth were randomly separated into 2 basic groups (normal or fluoridated teeth), then divided into 5 subgroups. Group A specimens were not contaminated. After etching, enamel surfaces were dry and clean. Group B was left with wet surfaces after etching. Group C specimens were contaminated with artificial saliva and then dried. Group D specimens were contaminated with artificial saliva, rinsed, and then dried. In group E, all enamel surfaces were left contaminated with saliva after the etching procedures (with maleic acid or phosphoric acids). Adhesive resins were applied to all enamel surfaces according to the manufacturer's instructions. The specimens were then mounted and tested to determine shear bond strength. RESULTS: If normal enamel surfaces were rinsed and dried immediately after contamination, there was no significant reduction of shear bond strength of adhesive to enamel. Specimens in group E and group C had significantly lower bond strengths than did control specimens (group A). In the fluoridated groups etched with the phosphoric acid, statistically significant reductions in bond strengths were obtained in all contamination groups and in the control group. In the fluoridated specimens, there were no statistically significant differences between any of the contamination groups and the control group when maleic acid was used. CONCLUSION: Saliva contamination may not be a risk factor for successful bonding between bonding agent and dental tissues for normal or fluoridated enamel surfaces if they are rinsed and dried immediately after contamination. Etching of normal enamel surfaces with phosphoric acid in the presence of contamination may provide higher shear bond strength than etching with maleic acid. Descriptors Acid Etching, Dental/methods, Composite Resins, Dental Bonding, Dental Enamel/chemistry, Dentin-Bonding Agents, Desiccation, Fluorides/chemistry, Humans, Maleates, Materials Testing, Molar, Phosphoric Acids, Random Allocation, Resin Cements, Saliva, Artificial, Silicon Dioxide, Statistics, Nonparametric, Tensile Strength, Water/chemistry, Zirconium Links Book Title Database Publisher Data Source Authors Benderli,Y., Gokce,K., Buyukgokcesu,S. Original/Translated Title URL Date of Electronic PMCID Editors
Polyphasic study of the spatial distribution of microorganisms in Mexican pozol, a fermented maize dough, demonstrates the need for cultivation-independent methods to investigate traditional fermentations	1999	Laboratoire de Biotechnologie Microbienne Tropicale, Institut de Recherche pour le Developpement, F-34032 Montpellier cedex 1, France. Frederic.Ampe@mpl.ird.fr	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Applied and Environmental Microbiology Periodical, Abbrev. Appl.Environ.Microbiol. Pub Date Free Form Dec Volume 65 Issue 12 Start Page 5464 Other Pages 5473 Notes LR: 20140615; GENBANK/AF138777; GENBANK/AF138778; GENBANK/AF138779; GENBANK/AF138780; GENBANK/AF138781; GENBANK/AF138782; GENBANK/AF138783; GENBANK/AF138784; GENBANK/AF138785; GENBANK/AF138786; GENBANK/AF138787; GENBANK/AF138788; JID: 7605801; 0 (DNA, Bac Place of Publication UNITED STATES ISSN/ISBN 0099-2240; 0099-2240 Accession Number PMID: 10584005 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI Output Language Unknown(0) PMID 10584005 Abstract The distribution of microorganisms in pozol balls, a fermented maize dough, was investigated by a polyphasic approach in which we used both culture-dependent and culture-independent methods, including microbial enumeration, fermentation product analysis, quantification of microbial taxa with 16S rRNA-targeted oligonucleotide probes, determination of microbial fingerprints by denaturing gradient gel electrophoresis (DGGE), and 16S ribosomal DNA gene sequencing. Our results demonstrate that DGGE fingerprinting and rRNA quantification should allow workers to precisely and rapidly characterize the microbial assemblage in a spontaneous lactic acid fermented food. Lactic acid bacteria (LAB) accounted for 90 to 97% of the total active microflora; no streptococci were isolated, although members of the genus Streptococcus accounted for 25 to 50% of the microflora. Lactobacillus plantarum and Lactobacillus fermentum, together with members of the genera Leuconostoc and Weissella, were the other dominant organisms. The overall activity was more important at the periphery of a ball, where eucaryotes, enterobacteria, and bacterial exopolysacharide producers developed. Our results also showed that the metabolism of heterofermentative LAB was influenced in situ by the distribution of the LAB in the pozol ball, whereas homolactic fermentation was controlled primarily by sugar limitation. We propose that starch is first degraded by amylases from LAB and that the resulting sugars, together with the lactate produced, allow a secondary flora to develop in the presence of oxygen. Our results strongly suggest that cultivation-independent methods should be used to study traditional fermented foods. Descriptors Agriculture/methods, Bacteria/classification/genetics/isolation & purification, DNA Fingerprinting, DNA, Bacterial/genetics, DNA, Ribosomal/genetics, Fermentation, Mexico, Polymerase Chain Reaction, RNA, Bacterial/genetics, RNA, Ribosomal, 16S/genetics, Zea mays/microbiology Links Book Title Database Publisher Data Source Authors Ampe,F., ben Omar,N., Moizan,C., Wacher,C., Guyot,J. P. Original/Translated Title URL Date of Electronic PMCID PMC91745 Editors
The diagnosis and management of Barrett's esophagus	1999	University of Southern California School of Medicine, Los Angeles, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Advances in Surgery Periodical, Abbrev. Adv.Surg. Pub Date Free Form Volume 33 Issue Start Page 29 Other Pages 68 Notes LR: 20091111; JID: 0045335; RF: 93; ppublish Place of Publication UNITED STATES ISSN/ISBN 0065-3411; 0065-3411 Accession Number PMID: 10572561 Language eng SubFile Journal Article; Review; IM DOI Output Language Unknown(0) PMID 10572561 Abstract Since its description in the 1950s, the definition of Barrett's esophagus has evolved from the macroscopic visualization of gastric-appearing mucosa in the esophagus to the histologic identification of goblet cells confirming the presence of intestinal metaplasia within the esophagus. The length of intestinal metaplasia necessary to be classified as Barrett's, and the relationship between intestinal metaplasia of the esophagus and that limited to the cardia are all areas currently being evaluated. However, any segment of intestinal metaplasia is capable of undergoing dysplastic change and ultimately of becoming a focus of adenocarcinoma. It is logical to expect the degree of risk for developing cancer to be proportional to the amount of intestinal metaplasia present; however, within a population, the low risk to any individual is balanced by the relative frequency of the process. Thus, given the large numbers of people in America with CIM, even a small risk of progression to cancer will result in a large number of patients with adenocarcinoma of the cardia. This is exactly what is occurring today, with the incidence of adenocarcinoma of the cardia and esophagus currently rising faster than any other cancer in the United States. A major risk factor for adenocarcinoma of the esophagus is intestinal metaplasia, which occurs as a consequence of GERD. Patients with Barrett's esophagus usually have more severe reflux disease with significant impairment of LES function and esophageal body motility compared with patients without Barrett's. Furthermore, in patients with Barrett's, the composition of the refluxed juice is different. Patients who reflux both gastric and duodenal juice have a higher prevalence of Barrett's than do those who reflux gastric juice alone. Among patients with Barrett's, a significantly greater esophageal bilirubin exposure has been demonstrated in those with dysplasia. The mechanically defective sphincter and impaired esophageal body function in many patients with Barrett's makes their disease difficult to control medically. In addition, symptoms are unreliable as a guide to successful control of reflux. The hardest symptom to control is regurgitation, and there is concern that this and continued reflux of pharmacologically altered gastric contents, particularly bile acids in their nonpolar form, may contribute to progression of Barrett's. Both medical therapy and failed antireflux surgery are associated with progression of Barrett's to dysplasia and adenocarcinoma. On the other hand, a functioning fundoplication seems to be associated with protection from progression of Barrett's. Intestinal metaplasia of the esophagus is unlikely to regress after antireflux surgery; however, intestinal metaplasia limited to the cardia is perhaps more dynamic and able to regress. Furthermore, low-grade dysplasia frequently regresses after an antireflux procedure. Antireflux surgery is safe, effective, and durable, and often can be performed using minimally invasive techniques. Thus, antireflux surgery should be strongly considered in any patient with intestinal metaplasia of the esophagus or cardia. The possibility of mucosal ablation after an antireflux repair should be considered in patients with low-grade dysplasia. Patients with Barrett's and high-grade dysplasia are at high risk for having a focus of adenocarcinoma present. Even with multiple biopsies, a degree of sampling error exists. Also, adenocarcinoma can develop within the space of several months; and if the cancer is allowed to invade into the submucosa, 50% of these patients will have lymphatic metastases, thereby negating the purpose of surveillance. Although patients with high-grade dysplasia and intramucosal adenocarcinoma on biopsy who do not have an endoscopically visible lesion are unlikely to have lymphatic metastases, 7% do have submucosal invasion. Thus, even in these very early tumors, treatment directed Descriptors Adenocarcinoma/diagnosis/pathology/surgery, Barrett Esophagus/diagnosis/pathology/surgery, Cell Transformation, Neoplastic/pathology, Esophageal Neoplasms/diagnosis/pathology/surgery, Esophagus/pathology/surgery, Humans, Precancerous Conditions/diagnosis/pathology/surgery, Prognosis Links Book Title Database Publisher Data Source Authors DeMeester,S. R., DeMeester,T. R. Original/Translated Title URL Date of Electronic PMCID Editors
Self-etching primer vs phosphoric acid: an alternative concept for composite-to-enamel bonding	1999	University of Kiel, Clinic of Operative Dentistry and Periodontology, Germany.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Operative dentistry Periodical, Abbrev. Oper.Dent. Pub Date Free Form May-Jun Volume 24 Issue 3 Start Page 172 Other Pages 180 Notes LR: 20131121; JID: 7605679; 0 (Clearfil Liner Bond 2); 0 (Composite Resins); 0 (Dental Cements); 0 (Dentin-Bonding Agents); 0 (Diphosphates); 0 (Etch&Prime); 0 (Methacrylates); 0 (Monobond S); 0 (Phosphoric Acids); 0 (Polymers); 3K9958V90M (Ethanol); Place of Publication UNITED STATES ISSN/ISBN 0361-7734; 0361-7734 Accession Number PMID: 10530279 Language eng SubFile Comparative Study; Journal Article; D DOI Output Language Unknown(0) PMID 10530279 Abstract The purpose of this in vitro study was (1) to investigate the composite-to-enamel bond strength and (2) to analyze the marginal adaptation of resin composite restorations in class 2 cavities using three self-etching priming agents in comparison to conventional phosphoric acid etching and bonding application. In the first part of the study 24 extracted bovine incisors were embedded in acrylic resin and ground flat with 800-grit paper. The following three self-etching priming agents/composite resins were applied to the enamel surfaces of six teeth each: Clearfil Liner Bond 2/Clearfil AP-X (Group I), Etch & Prime 3.0/Degufill mineral (Group II), Resulcin AquaPrime + MonoBond/Ecusit (Group III). In Group IV Ecusit-Mono/Ecusit was used after enamel etching with phosphoric acid (37%). Shear bond strength values measured on a T22 K testing machine at a crosshead speed of 1 mm/min were: 24.2 +/- 3.0 MPa (Group I), 21.9 +/- 1.4 MPa (II), 34.0 +/- 3.6 MPa (III), and 26.3 +/- 1.8 MPa (IV). ANOVA revealed significant (P < 0.05) differences in shear bond strength between groups, except comparison of Group I and II, and Group I and IV. In the second part of the study 24 standardized class 2 cavity preparations with the approximal box extending 1 mm above the CEJ were prepared in extracted human molars. Enamel margins were beveled and the teeth were divided into four groups of six teeth each. Cavities were restored using the self-etching priming agents Clearfil Liner Bond 2 (Group I), Etch & Prime 3.0 (Group II), and Resulcin AquaPrime + MonoBond (Group III). In Group IV composite resin restorations were placed after 37% phosphoric acid etching and bonding application (Ecusit-Mono). Quantitative SEM analysis of the marginal adaptation of the restorations after thermocycling (5-55 degrees C, 2500 cycles) and mechanical loading (100 N, 500,000 cycles) revealed excellent, gap-free margins in 91.2% (Group I), 93.0% (Group II), 92.0% (Group III), and 92.5% (Group IV) of the restorations' approximal area. There were no statistically significant differences between the four groups (P < 0.05). In conclusion, results of the present in vitro study indicate that use of self-etching primers may be an alternative to conventional phosphoric acid pre-treatment in composite-to-enamel bonding restorative techniques. Descriptors Acid Etching, Dental, Animals, Cattle, Composite Resins, Dental Bonding/methods, Dental Cements, Dental Enamel, Dental Marginal Adaptation, Dental Restoration, Permanent/methods, Dentin-Bonding Agents, Diphosphates, Ethanol, Humans, Materials Testing, Methacrylates, Microscopy, Electron, Scanning, Phosphoric Acids, Polymers/chemistry, Tensile Strength Links Book Title Database Publisher Data Source Authors Hannig,M., Reinhardt,K. J., Bott,B. Original/Translated Title URL Date of Electronic PMCID Editors
Topographical characteristics and shear bond strength of tooth surfaces cut with a laser-powered hydrokinetic system	1999	Department of Biomaterials Science, University of the Pacific School of Dentistry, San Francisco, CA 94115, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The Journal of prosthetic dentistry Periodical, Abbrev. J.Prosthet.Dent. Pub Date Free Form Oct Volume 82 Issue 4 Start Page 451 Other Pages 455 Notes LR: 20141120; JID: 0376364; 0 (Composite Resins); ppublish Place of Publication UNITED STATES ISSN/ISBN 0022-3913; 0022-3913 Accession Number PMID: 10512965 Language eng SubFile Comparative Study; Journal Article; D; IM; S DOI S0022391399002486 [pii] Output Language Unknown(0) PMID 10512965 Abstract STATEMENT OF PROBLEM: Erbium lasers, specifically Er;YAG and Er, Cr;YSGG that emit in the near red wavelengths, cut both enamel and dentine. Bonding to these cut surfaces with composites has not been assessed for all laser systems. PURPOSE: This investigation assessed the shear bond strength of composite bonded to tooth structure treated with an Er,Cr;YSGG-powered hydrokinetic system (HKS, Millennium system) and then was compared with surfaces treated with a carbide bur. MATERIAL AND METHODS: Extracted human molars were cut into enamel and dentin with both systems. Nonetched and acid-etched subgroups were evaluated. Shear bond strength was measured with an Instron test machine with a knife-edge loading head. In addition, SEMs were evaluated. RESULTS: There were no significant differences in shear bond strength between etched bur cut (23.3 +/- 2.5 MPa), etched laser-cut enamel (23.7 +/- 4.5 MPa), and nonetched laser-cut enamel (20.5 +/- 2.8 MPa). For nonetched enamel, bond strength values for laser-cut surfaces were significantly higher than the bur-cut surfaces (8.7 +/- 4.3 MPa). Bond strength differences for dentin between bur (14.3 +/- 1.7 MPa) and laser cuts (11.5 +/- 4.3 MPa) were not significant (P =.03). SEM revealed that laser cutting of enamel did not cause formation of a smear layer. CONCLUSION: There were no significant differences in shear bond strength between etched bur-cut, etched laser-cut, and nonetched laser-cut enamel. With nonetched enamel, bond strength values for nonetched laser-cut surfaces were significantly higher than for the bur-cut surfaces. No bond strength differences between bur and laser cutting existed for dentin. Similar topography was observed for bur and laser prepared surfaces of etched enamel and nonetched dentin. Descriptors Acid Etching, Dental, Composite Resins, Dental Enamel/physiology/surgery/ultrastructure, Dental High-Speed Equipment, Dentin/physiology/surgery/ultrastructure, Humans, In Vitro Techniques, Laser Therapy/instrumentation/methods, Microscopy, Electron, Scanning, Molar, Stress, Mechanical, Surface Properties, Tooth/physiology/surgery/ultrastructure Links Book Title Database Publisher Data Source Authors Lin,S., Caputo,A. A., Eversole,L. R., Rizoiu,I. Original/Translated Title URL Date of Electronic PMCID Editors
Barrett's esophagus: a surgical disease	1999	Department of Surgery, University of California, San Francisco, San Francisco, California 94143-0788, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract Periodical, Abbrev. J.Gastrointest.Surg. Pub Date Free Form Jul-Aug Volume 3 Issue 4 Start Page 397 Other Pages 403; discussion 403-4 Notes LR: 20041117; JID: 9706084; ppublish Place of Publication UNITED STATES ISSN/ISBN 1091-255X; 1091-255X Accession Number PMID: 10482692 Language eng SubFile Journal Article; IM DOI S1091255X99800560 [pii] Output Language Unknown(0) PMID 10482692 Abstract Barrett's metaplasia can develop in patients with gastroesophageal reflux disease (GERD), and metaplasia can evolve into dysplasia and adenocarcinoma. The optimal treatment for Barrett's metaplasia and dysplasia is still being debated. The study reported herein was designed to assess the following: (1) the incidence of Barrett's metaplasia among patients with GERD; (2) the ability of laparoscopic fundoplication to control symptoms in patients with Barrett's metaplasia; (3) the results of esophagectomy in patients with high-grade dysplasia; and (4) the character of endoscopic follow-up programs of patients with Barrett's disease being managed by physicians throughout a large geographic region (northern California). Five-hundred thirty-five patients evaluated between October 1989 and February 1997 at the University of California San Francisco Swallowing Center had a diagnosis of GERD established by upper gastrointestinal series, endoscopy, manometry, and pH monitoring. Thirty-eight symptomatic patients with GERD and Barrett's metaplasia underwent laparoscopic fundoplication. Eleven other consecutive patients with high-grade dysplasia underwent transhiatal esophagectomies. Barrett's metaplasia was present in 72 (13%) of the 535 patients with GERD. The following results were achieved in patients who underwent laparoscopic fundoplication (n = 38): Heartburn resolved in 95% of patients, regurgitation in 93% of patients, and cough in 100% of patients. With regard to transhiatal esophagectomy (n = 11), the average duration of the operation was 339 +/- 89 minutes. The only significant complications were two esophageal anastomotic leaks, both of which resolved without sequelae. Mean hospital stay was 14 +/- 5 days. There were no deaths. The specimens showed high-grade dysplasia in seven patients and invasive adenocarcinoma (undiagnosed preoperatively) in four (36%). These results can be summarized as follows: (1) Barrett's metaplasia was present in 13% of patients with GERD being evaluated at a busy diagnostic center; (2) laparoscopic fundoplication was highly successful in controlling symptoms of GERD in patients with Barrett's metaplasia; (3) in patients with high-grade dysplasia esophagectomy was performed safely (invasive cancer had eluded preoperative endoscopic biopsies in one third of these patients); and (4) even though periodic endoscopic examination of Barrett's disease is universally recommended, this was actually done in fewer than two thirds of patients being managed by a large number of independent physicians in this geographic area. Descriptors Adenocarcinoma/pathology, Adult, Aged, Aged, 80 and over, Anastomosis, Surgical/adverse effects, Barrett Esophagus/etiology/pathology/surgery, California, Cough/therapy, Esophageal Neoplasms/pathology, Esophagectomy/adverse effects, Esophagoscopy, Esophagus/pathology, Female, Follow-Up Studies, Fundoplication, Gastroesophageal Reflux/complications, Heartburn/therapy, Humans, Hydrogen-Ion Concentration, Incidence, Laparoscopy, Length of Stay, Male, Manometry, Metaplasia, Middle Aged, Monitoring, Ambulatory, Time Factors Links Book Title Database Publisher Data Source Authors Patti,M. G., Arcerito,M., Feo,C. V., Worth,S., De Pinto,M., Gibbs,V. C., Gantert,W., Tyrrell,D., Ferrell,L. F., Way,L. W. Original/Translated Title URL Date of Electronic PMCID Editors

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