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Results 451 - 500 of 646
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Saxer U P - - 1997
The new generation of manual and powered toothbrushes that have been tested in recent years exhibit better plaque removal than do older brushes. Differences are most significant when individuals have been instructed in proper brushing technique. Comparisons of powered and manual brushes show the clear superiority of newer powered brushes, ...
Heemken R - - 1997
The peritoneal cavity can be divided in the supracolic infracolic and paracolic spaces, the lesser sack and the pelvis. The peritoneum is a semipermeable membrane which allows a flux of solutes into and from the peritoneal cavity. In addition, particles can be absorbed through the stomata of the diaphragmatic peritoneum. ...
Hatibovic-Kofman S - - 1997
It is well established that glass ionomers (GI) release fluoride (F). The degree of F released depends on the physical and chemical properties of the product. In the present study the fluoride release and the capacity of the GI to be recharged with fluoride was tested for five different brands: ...
Haffajee A D - - 1997
The purpose of the present investigation was to examine the effect of SRP on clinical and microbiological parameters in 57 subjects with adult periodontitis (mean age 47 +/- 11 years). Subjects were monitored clinically and microbiologically prior to and 3, 6 and 9 months after full-mouth SRP under local anaesthesia. ...
van Benthum W A - - 1997
A Biofilm Airlift Suspension (BAS) reactor was operated with nitrifying biofilm growth and heterotrophic suspended growth, simultaneously converting ammonium and acetate. Growth of heterotrophs in suspension decreases the diffusion limitation for the nitrifiers, and enlarges the nitrifying capacity of a biofilm reactor. Neither nitrifiers nor heterotrophs suffer from additional oxygen ...
Roméro-Graillet C - - 1997
Ultraviolet (UV) radiation is the main physiological stimulus for human skin pigmentation. Within the epidermal-melanin unit, melanocytes synthesize and transfer melanin to the surrounding keratinocytes. Keratinocytes produce paracrine factors that affect melanocyte proliferation, dendricity, and melanin synthesis. In this report, we show that normal human keratinocytes secrete nitric oxide (NO) ...
Griffiths G S - - 1997
Changes in the permeability of the underlying vasculature of the gingival crevice region may occur either as part of an inflammatory response during gingivitis or as a response to trauma during collection of gingival crevicular fluid IgM was selected as a marker of permeability and the concentration in gingival crevicular ...
Tzaphlidou M - - 1997
The structure of mouse skin collagen fibrils after treatment with 0.5, 1 and 2.5 Gy gamma-irradiation was studied by electron microscopy. Animals were sacrificed 1, 4 and 8 weeks after irradiation. Although there were areas where the normal parallel packing of fibrils was retained in some regions packing was interrupted ...
Shibly O - - 1997
The objective of this 60-day single-blind, parallel trial, using 150 subjects, was to evaluate the effect of a 20% sodium bicarbonate dentifrice, a 1.5% hydrogen peroxide solution and a mouth moisturizer on oral tissues and microflora. Subjects were randomly assigned to one of five groups. The treatments were: 1) Sage ...
Pérez M - - 1997
This paper reports and discusses a laboratory experiment that tested the anaerobic fluidized bed (AFB) technology as a means for the treatment of concentrated industrial wastewater (wine distillery, vinasses) at thermophilic conditions. The purposes were to operate and characterize AFB under high organic loading conditions and to report on their ...
Radford J R - - 1997
OBJECTIVES: The aims of this study were to examine the effect of the use of a mouthwash containing 0.05% cetylpyridinium chloride (CPC) on (1) the composition of the normal oral microbial flora and (2) the establishment of non-oral bacterial species in the mouth. METHOD: In a double-blind study, 129 subjects ...
Rukunga G M - - 1996
The CH2Cl2 extract of the stem bark of Albizia gummifera yielded four macrocyclic spermine alkaloids (budmunchiamines), three of them being new analogues. On the basis of spectral analysis and comparison with related compounds they were identified as budmunchiamine G (1) and the new analogues budmunchiamine K (2), 6'xi-hydroxybudmunchiamine K (3), ...
Polson A M - - 1996
A biodegradable drug delivery system containing 5% sanguinarium (Sa) was compared to vehicle control (VC), scaling and root planing (SRP), and supragingival plaque control (SPC) in the treatment of adult periodontitis in 2 well-controlled clinical trials. Studies were 4-quadrant (split mouth) designs at 2 centers each, having 94 (Study A) ...
Van der Weijden F A - - 1996
PURPOSE: To test the plaque removing efficacy of three different toothbrushes in relation to duration of toothbrushing. MATERIALS AND METHODS: The brushes studied were the Sonicare, the Braun Plak Remover (D7), and a modified Plak Control with increased speed (D9). Part 1 of the study was divided into four experiments ...
Fine D H - - 1996
In this controlled clinical study, the authors examined the effect of subgingival irrigation and rinsing with an antiseptic mouthrinse before ultrasonic scaling of a quadrant containing inflamed gingivae. The results showed that pre-procedural subgingival irrigation and rinsing can significantly reduce the level of bacteremia associated with ultrasonic scaling. These results ...
Tanner A - - 1996
Thirteen periodontally healthy subjects were monitored clinically for 6-12 months. Clinical measurements at 6-weekly intervals included duplicate PD measurements, presence of plaque, redness, and bleeding on probing. Baseline measurements consisted of 2 visits 1 wk apart. Microbial samples were taken from 11 of the subjects who had completed at least ...
Henskens Y M - - 1996
Cystatins are physiological inhibitors of cysteine proteinases and widely distributed in human tissues and fluids including saliva. Cystatins S, SA, SN, and D are only found in glandular saliva and tear fluid whereas cystatin C has been detected in all tested biological fluids. Previous studies demonstrated that total cystatin activity ...
Chang S F - - 1996
IM meat products are produced by lowering the aw to 0.90 to 0.60. Such products are stable at ambient temperature and humidity and are produced in nearly every country in the world, especially in developing areas where refrigeration is limited or unavailable. Traditionally IM meats use low cost sources of ...
Stabholz A - - 1996
A clinical study was carried out in an attempt to assess the efficacy of a newly designed electric toothbrush compared to a conventional manual toothbrush using the American Dental Association's protocol for evaluating toothbrushes. An Oral-B 35 manual toothbrush, which served as the control, was compared to the Plaq & ...
Tufts B - - 1996
In vivo experiments were carried out to determine the relative effects of carbonic anhydrase (CA) infusion or inhibition on carbon dioxide (CO2) transport and acid-base status in the arterial and venous blood of sea lampreys recovering from exhaustive exercise. Infusion of CA into the extracellular fluid did not significantly affect ...
Netuschil L - - 1995
The aim of this double-blind study was to enumerate the total number of living and dead bacteria on defined tooth areas during the application of antibacterial mouthrinses. After prophylaxis, 40 students refrained from all oral hygiene measures for 3 d, during which they rinsed with a phenolic compound (Listerine), an ...
Maze G I - - 1995
Controlled local delivery of antibiotics has been shown to reduce periodontopathic micro-organisms with minimal side-effects. Clinical studies in our laboratory have shown that 25% tetracycline HCl delivered from poly(D,L-lactide/glycolide) film strips (25 TTC-PLGA) released therapeutic concentrations of tetracycline for 10 days. The present pilot study compared the intracrevicular delivery of ...
Sotiriou M - - 1995
This in vivo study examined forces exerted during the recording of impressions of dentate maxillary arches. This study consisted of 10 subjects; four impression materials in metal stock trays and disposable plastic trays were used. The load rate and the maximum insertion and removal forces were measured with strain gauges ...
Hinrichs J E - - 1995
A reproducible and sensitive laser Doppler periodontal probe has recently been developed for intrasulcular measurement of gingival blood flow. The specific aims of this investigation were to determine the relation between intrasulcular laser Doppler readings (LDR) and traditional diagnostic criteria as well as to evaluate the response to root planning ...
Oda Y - - 1995
The antigenotoxic effects of curcumin, including the inhibition of SOS induction and mutagenesis by UV light, were investigated in Salmonella typhimurium TA1535/pSK1002 and Escherichia coli K-12 strains. Induction of the SOS gene (umuC) expression was assayed by measuring accumulated beta-galactosidase activity. We found that curcumin blocked umuC induction promoted by ...
Wanner O - - 1995
A packed bed biofilm reactor inoculated with pure culture Pseudomonas aeruginosa was run under high substrate loading and constant flow rate conditions. The 3.1-cm-diameter cylindrical reactor was 5 cm in length and packed with 1-mm glass beads. Daily observations of biofilm thickness, influent and effluent glucose substrate concentration, and effluent ...
Newcombe R G - - 1995
The efficacy of oral hygiene agents in preventing the accumulation of plaque from a zero baseline is conveniently evaluated in the 4-day plaque regrowth model. In many studies a panel of volunteers has been used to compare several agents according to a highly efficient Latin square based crossover design. Often ...
Medina F J - - 1995
The well-known technique of silver staining of the nucleolar organizer (Ag-NOR) is improved in contrast, selectivity and speed when performed with microwave irradiation. The Ag-NOR technique is a very useful tool for studies on the functional morphology and molecular architecture of the nucleolus, and is reputed to be one of ...
Hausberger A G - - 1995
PURPOSE: The objective of the reported work was to quantitatively establish gamma-irradiation dose effects on initial molecular weight distributions and in vitro degradation rates of a candidate erodible biopolymeric delivery system. METHODS: Poly(D,L-lactide-coglycolide) (PLGA) porous microparticles were prepared by a phase-separation technique using a 50:50 copolymer with 30,000 nominal molecular ...
Walsh T F - - 1995
24 adult patients suffering from Adult periodontitis were assigned to 4 groups: the 1st rinsed for 1 min with 0.2% chlorhexidine gluconate (CHX); the 2nd group were irrigated for 15 s with 0.2% CHX in a pulsed oral irrigator; the 3rd group rinsed for 1 min with saline and the ...
Pienihäkkinen K - - 1995
The aim of the study was to compare the efficacy of a 40% chlorhexidine (CHX) varnish (EC40, Certichem, Nijmegen, The Netherlands) with a 1% CHX-0.2% NaF gel in decreasing the level of salivary mutans streptococci (MS). The subjects were screened for a high level of MS using a Dentocult-SM strip ...
Perlich M A - - 1995
The effects of a stabilized 0.454% stannous fluoride dentifrice, currently marketed as Crest Gum Care, on supragingival plaque, gingivitis, gingival bleeding and oral soft tissue condition were studied in 328 adult male and female subjects who completed a six-month, double blind clinical study. Following initial examinations, subjects presenting with a ...
Imfeld T - - 1995
The aim of this investigation was to study the effect of sugar-free chewing gums containing various amounts of urea on the pH recovery in dental plaque. Three plaque-measuring methods were used, i.e., the telemetric, the microtouch, and the sampling methods. The subjects who had refrained from toothbrushing for 3-7 days ...
Moran J M - - 1995
Recent studies have suggested that a sonic electric toothbrush is more effective than a manual brush at removing extrinsic dental stain. There have been few studies of the comparative stain removal properties of different electric brushes. The study reported here was conducted to compare the efficacy of the sonic toothbrush ...
de Souza-Gugelmin M C - - 1995
The objective of the present study was to create an index for the adequate evaluation of gingival immunological defense with respect to IgA levels. The gingival immunological defense index (GIDI), which is based on the simple count of the inflamed gingival surfaces of a child plus the measurement of salivary ...
Gutiérrez J - - 1994
Alterations in phagocytosis appear to be important in the onset and development of periodontitis. We investigated new substances that may be of use in the treatment of periodontitis. In a preliminary study, we tested the effect of sodium fluoride on phagocytosis by circulating polymorphonuclear leucocytes (PMNs) in 10 replicate assays ...
Clark D C - - 1994
Dental caries in dentate elderly patients may be controlled with chlorhexidine. The purpose of this study is to establish the effectiveness of two low-concentration chlorhexidine mouthrinses in reducing the microbial counts of cariogenic bacteria in a sample of institutionalized elders. Stimulated saliva samples from all subjects before treatment produced counts ...
Kjaerheim V - - 1994
A double-blind cross-over clinical study was performed on eight volunteers to determine the plaque-inhibiting effect of different triclosan- and sodium lauryl sulfate (SLS)-containing mouthrinses. An attempt was also made to locate the binding site(s) of triclosan in the oral cavity. After the volunteers rinsed for four days with solutions of ...
Curran T M - - 1994
Fluoride at concentrations greater than 0.01 mM was found to be a quasi-irreversible inhibitor of enolase of permeabilized cells of Streptococcus mutans GS-5 and also of isolated yeast enolase. The inhibition appeared to be of the type that has been described for P-ATPases, but was not dependent on added Al3+ ...
Shibasaki K - - 1994
The effects of low molecular chitosan (LMCS) on pH responses of human dental plaque following exposure to fermentable carbohydrates were investigated by an ion-sensitive field-effect transistor electrode system. After the plaque pH values were minimized by direct application of 5% glucose solution or consumption of sugared caramel, the subjects started ...
Abbott D M - - 1994
Delmopinol, a 3-alkyl substituted N-hydroethyl morpholine, has shown potential as a mouthrinse for the management of dental plaque and treatment of gingivitis. Delmopinol has been shown to possess plaque inhibitory activity in several previous studies. The aims of this study were to: 1) compare the antiplaque, antigingivitis efficacy and safety ...
Strocchi A - - 1994
The constancy of the hydrogen consuming flora of the human colon was studied in 15 healthy subjects via two measurements obtained 18 to 36 months apart. Hydrogen disappearance rate and the major products of H2-consuming bacteria, methane and sulfide, were measured during incubation of fecal homogenates with excess hydrogen and ...
Kowitz G M - - 1994
A 2-week, three-cell study was conducted to evaluate the tooth-whitening efficacy of the Colgate Platinum Professional Toothwhitening System vs Rembrandt Gel Plus (a regimen of products consisting of a 10% carbamide peroxide gel, a whitening toothpaste, and a mouthrinse), and a placebo paste. Seventy subjects completed this parallel, single-blind, three-compartment, ...
Kimura M - - 1994
Previous studies show that the combined method using thrombolytic drugs and ultrasonic irradiation enhances the effect of thrombolysis in in vitro and in vivo experiments. However, the mechanism of the clot lysis was unclear. In previous studies the evaluation of the clot lysis effect was determined by the rate of ...
Tennakoon C L - - 1994
This paper deals with the electrochemical production of hydrogen by depolarizing the oxygen evolution reaction using human feces and urine, which contains 30-40% bacteria and yeast. The electroactivity of graphite, tungsten carbide, perovskite and RuO2-coated Ebonex (Ti4O7) as anode materials are compared. The scale-up of the process in a laboratory-scale ...
Hanioka T - - 1994
Topical application of Coenzyme Q10 (CoQ10) to the periodontal pocket was evaluated with and without subgingival mechanical debridement. Ten male patients with adult periodontitis participated and 30 periodontal pockets were selected. During the first 3 weeks, the patients did not receive any periodontal therapy except the topical application of CoQ10. ...
Nathoo S A - - 1994
A 2-week study was conducted to evaluate the tooth-whitening efficacy of Colgate Platinum Professional Toothwhitening System vs Rembrandt Lighten Bleaching Gel. Thirty-eight subjects completed this single-blind, randomized, parallel clinical study. The subjects were balanced into two groups based on a minimal shade of A3 on the Vita shade guide. The ...
Selim H A - - 1994
Bleaching is a viable treatment alternative to attempt esthetic improvement of discolored teeth. Natural tooth structure as opposed to a veneer or crown margin is considerably superior in tissue response. Caution has to be exercised in selecting cases and advising patients of the possibilities from bleaching and that bleaching may ...
Iizawa O - - 1994
Lipid peroxide levels, the activities of superoxide dismutase (SOD), catalase and glutathione peroxidase (GSH-Px), and the development of tanning in the skin of C57 BL/6 mice were assessed for long periods, from very early to late stages, after acute or chronic UVB irradiation. Acute UVB irradiation produced an increase in ...
Dahlén G - - 1993
This study has shown that microorganisms associated with caries (mutans streptococci, lactobacilli) and marginal periodontitis (Porphyromonas gingivalis, Prevotella intermedia and Actinobacillus actinomycetemcomitans) in pure culture can be stored in VMGA or reduced transport fluid and be recovered sufficiently after 24 h. Sufficient recovery after 24 h of mail transport was ...
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