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Search Results: 1 - 10 of 4731 matches for " Dental plaque "
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Isolation of Dental Caries Bacteria from Dental Plaque and Effect of Tooth Pastes on Acidogenic Bacteria  [PDF]
Dhruw Chandrabhan, Rajmani Hemlata, Bhatt Renu, Verma Pradeep
Open Journal of Medical Microbiology (OJMM) , 2012, DOI: 10.4236/ojmm.2012.23009
Abstract: Destruction of calcified tissue was caused by acids which are by product of carbohydrate metabolism of acidogenic bacteria consequent to dental caries. The purpose of this study was to assess the existence of acidogens potentially causing the dental caries and comparatively evaluation of efficacy of different toothpastes. The dental plaques of fifty persons belong to three age groups (1 - 20, 21 - 40, 41 - 60 year and above) were examined to identify microorganisms by the culture method. Thirty nine bacteria were isolated by spread plate method on BSMY I minimal media. Thirteen out of thirty nine, acidogens colonized in the dental plaques. Seven potentially acidogens CD17, CD26, CD27, CD28, CD29, CD34 and CD35 were treated with five different toothpastes. Inhibition effect of Triclosan and Fluoride containing tooth pastes were found more efficient. The results of the present study revealed that bacteria that commonly cause dental caries colonized in dental plaques of children and alcoholic person. Therefore, dental plaques must be considered a specific reservoir of colonization and subsequent dental caries. To reduce the dental problem triclosan and fluoride containing product should be recommended.
Effect of Surface Roughness and Materials Composition  [PDF]
Maryam Gharechahi, Horieh Moosavi, Maryam Forghani
Journal of Biomaterials and Nanobiotechnology (JBNB) , 2012, DOI: 10.4236/jbnb.2012.324056
Abstract: In the mouth, biofilm formation occurs on all soft and hard surfaces. Microbial colonization on such surfaces is always preceded by the formation of a pellicle. The physicochemical surface properties of a pellicle are largely dependent on the physical and chemical nature of the underlying surface. Thus, the surface structure and composition of the underlying surface will influence on the initial bacterial adhesion. The aim of this review is to evaluate the influence of the surface roughness and the restorative material composition on the adhesion process of oral bacteria. Both in vitro and in vivo studies underline the importance of both variables in dental plaque formation. Rough surfaces will promote plaque formation and maturation. Candida species are found on acrylic dentures, but dentures coating and soaking of dentures in disinfectant solutions may be an effective method to prevent biofilm formation. Biofilms on gold and amalgam are thick, but with low viability. Glass-ionomer cement collects a thin biofilm with a low viability. Biofilms on composites cause surface deterioration, which enhances biofilm formation. Biofilms on ceramics are thin and highly viable.
The effect of green tea mouthwash (Camellia sinensis) on wound healing following periodontal crown lengthening surgery; a double blind randomized controlled trial  [PDF]
Ali Forouzanfar, Hamid Reza Arab, Hooman Shafaee, Majid Reza Mokhtari, Shayan Golestani
Open Journal of Stomatology (OJST) , 2012, DOI: 10.4236/ojst.2012.24064
Abstract: Green tea has been used as a traditional medicine since 2700 BC and several studies have shown that green tea polyphenols inhibit the growth of oral and periodontal pathogenic bacteria and can improve oral and gingival health. In this clinical study we investigated the effect of green tea mouthwash on microbial dental plaque and gingival inflammation following periodontal surgery. A total of 34 crown lengthening surgeries were included in this study. After removing periodontal dressing, green tea mouthwash for the test group and placebo for the patients in the control group were prescribed, and periodontal parameters were assessed at base line and after 2 weeks. Analysis of the data revealed the significant effect of green tea mouthwash on reducing Plaque index (PI), Gingival Index (GI) and Bleeding on probing (BOP). Therefore it would be recommended as a safe, anti-inflammatory and anti-microbial mouthwash for treating gingival inflammation and maintaining oral and gingival health.
Evaluation of periodontal index of gingival and plaque with dental crowding in development of gingivits in children and adolescents
Maria Dalva de Souza SCHROEDER,Gerson Luis Ulema RIBEIRO
RSBO , 2004,
Abstract: The aim of this study was to evaluate the correlation between dentalcrowding and the periodontal index of gingival and plaque indevelopment of gingivits in children and adolescents in the age groupof 7 to 15 years old, as a mean to prevent the periodontal disease that according to literature, begins precociously during childhood anddevelops during adult age. After verification of the conditions through utilization of those indexes, it was possible to conclude that gingivitis was present in practically 100% of the examined individuals. There is a positive correlation between the presence of dental plaque and gum inflammation stages, it was not possible to establish a definite correlation between dental crowding and gingivitis.
Control mecánico - químico de la placa supragingival con diferentes concentraciones de clorhexidina
Santos Gusm?o,Estela; Cim?es,Renata; Souza Coelho,Renata de; Lima dos Santos,Rosenês; Moreira dos Santos,Daniella Rossiley; Vieira Eskinazi,Fernanda Maria; Leite de Macêdo,Carolina;
Acta Odontológica Venezolana , 2009,
Abstract: the aim of the present study was to evaluate the effectiveness of chlorhexidine in reducing supragingival biofilm index, this study compared two different concentrations of chlorhexidine associated with tooth brushing (experimental groups), and tooth brushing without any mouthrinse (control group). 75 patients, both sexes, participated in this study, aged 17 to 65 years, periodontally healthy, with no plaque retaining factor, and no systemic diseases. the dental biofilm was quantified by using the oral hygiene index simplified - ohi-s (debris index) and its percentages were recorded in two moments (initial and final), in a week interval. the sample was divided into three groups, each one with 25 patients: group i: toothbrushing without any mouthrinse; group ii: toothbrushing associated with manipulated chlorhexidine mouthrinse (0.12%); group iii: toothbrushing associated with commercial chlorhexidine mouthrinse (0.2%). results showed a significant reduction (p<0.05) between initial and final indices in all groups analyzed - no matter the treatment adopted; comparing the groups, the data indicated a significant difference between group iii (p<0.05) and groups i and ii; when analyzing sex variable, specifically men data, it was found significant association between groups ii and iii; when comparing groups i, ii and iii in relation to the variable age, results showed a significant difference in individuals aged 17 to 29 years, between groups i and iii. finally, data showed that all kinds of treatments proposed in this research were successful and significant in the reduction of the supragingival biofilm index, specially for group iii, which used toothbrushing associated to manipulated chlorhexidine mouthrinse (0.2%).
Antiplaque and antigingivitis effect of Lippia Sidoides: a double-blind clinical study in humans
Rodrigues, ítalo Sarto Carvalho;Tavares, Vinícius Nascimento;Pereira, Sérgio Luís da Silva;Costa, Flávio Nogueira da;
Journal of Applied Oral Science , 2009, DOI: 10.1590/S1678-77572009000500010
Abstract: objectives: the antiplaque and antigingivitis effect of lippia sidoides (ls) was evaluated in this in vivo investigation. material and methods: twenty-three subjects participated in a cross-over, double-blind clinical study, using 21-day partial-mouth experimental model of gingivitis. a toothshield was constructed for each volunteer, avoiding the brushing of the 4 experimental posterior teeth in the lower left quadrant. the subjects were randomly assigned initially to use either the placebo gel (control group) or the test gel, containing 10% ls (test group). results: the clinical results showed statistically significant differences for plaque index (pli) (p<0.01) between days 0 and 21 in both groups, however only the control group showed statistically significant difference (p<0.01) for the bleeding (ib) and gingival (gi) index within the experimental period of 21 days. on day 21, the test group presented significantly better results than the control group with regard to the gi (p<0.05). conclusions: the test gel containing 10% ls was effective in the control of gingivitis.
The cariogenic dental biofilm: good, bad or just something to control?
Wolff, Mark Steven;Larson, Charlie;
Brazilian Oral Research , 2009, DOI: 10.1590/S1806-83242009000500006
Abstract: this paper discusses the role of dental biofilm and adjunctive therapies in the management of dental caries. dental biofilm is a site of bacterial proliferation and growth, in addition to being a location of acid production. it also serves as a reservoir for calcium exchange between the tooth and saliva. the salivary pellicle, a protein-rich biofilm layer, regulates the reaction between tooth surface, saliva and erosive acids. the protective effects of this pellicle on enamel are well established. however, understanding the effects of the pellicle/biofilm interaction in protecting dentin from erosive conditions requires further research. saliva interacts with the biofilm, and is important in reducing the cariogenic effects of dental plaque as acidogenic bacteria consume fermentable carbohydrates producing acids that may result in tooth demineralization. adequate supplies of healthy saliva can provide ingredients for successful remineralization. strategies for managing the cariogenic biofilm are discussed with emphasis on the effectiveness of over-the-counter (otc) products. however, since many toothpaste components have been altered recently, new clinical trials may be required for true validation of product effectiveness. a new generation of calcium-based remineralizing technologies may offer the ability to reverse the effects of demineralization. nevertheless, remineralization is a microscopic subsurface phenomenon, and it will not macroscopically replace tooth structure lost in a cavitated lesion. optimal management of cavitations requires early detection. this, coupled with advances in adhesive restorative materials and microsurgical technique, will allow the tooth to be restored with minimal destruction to nearby healthy tissue.
The antimicrobial effect of 0.1 ppm ozonated water on 24-hour plaque microorganisms in situ
Sadatullah, Syed;Mohamed, Nor Himazian;Razak, Fathilah Abdul;
Brazilian Oral Research , 2012, DOI: 10.1590/S1806-83242012000200007
Abstract: ozone is a known oxidant present in the atmosphere and is commercially produced by simple ozonizer machines. it is a powerful antimicrobial agent in its gaseous and aqueous forms. ozone readily dissolves in water and retains its antimicrobial property even in the dissolved state. in this study, the effect of 0.1 ppm ozonated water was analyzed on 24-hour supragingival plaque (sp) samples in situ. sp was collected from the two most posterior teeth in the contra-lateral quadrants before and after a 30-second rinse with either distilled water (control group) or 0.1 ppm ozonated water (test group). the plaque was used to count the number of total bacteria, total anaerobic bacteria, streptococcus mutans, and candida albicans on selective agar media. the statistical analysis of the number of colony forming units (cfus) obtained demonstrated a significant antimicrobial effect of ozonated water on the total bacteria (p = 0.01) and anaerobes (p = 0.02). a reduction in the post-rinse cfu count for streptococcus mutans was also observed, but the effect was not statistically significant (p = 0.07). the candida species was only grown from one sample. ozonated water at the 0.1 ppm concentration was effective in reducing the load of 24-hour plaque bacteria, but it did not eliminate them completely.
Effect of instruction and motivation in the use of electric and manual toothbrushes in periodontal patients: a comparative study
Roscher, Tove;R?sing, Cassiano Kuchenbecker;Gjermo, Per;Merete Aass, Anne;
Brazilian Oral Research , 2004, DOI: 10.1590/S1806-83242004000400004
Abstract: the aim of the present study was to evaluate the efficacy of manual and electric toothbrushes in plaque control in periodontal patients after proper instructions. thirty six periodontal patients (mean age of 49 years, 21 females and 15 males) were included and completed the study (100% compliance). a single-blinded, randomized, controlled, cross-over clinical design was adopted, with the patients using during 2 periods of 14 days each the manual and/or electric toothbrush. four subgroups of 9 individuals were studied: a1 - used manual toothbrush in both experimental periods; a2 - used the manual toothbrush during the first period and the electrical toothbrush during the second period; b1 - used electrical toothbrush during both periods; b2 - used the electrical toothbrush in the first period and the manual one in the second period. brushing was performed during 14 days and at day 14 and 28 it was performed in the clinic, and timing of brushing was recorded without patients being aware. the plaque index (silness, l?e, 1964) was used. intra-group comparisons were performed by paired t-test and inter-group comparisons by independent sample t-test, with an alpha level of 0.05. the results showed no difference between the tested brushes neither for plaque nor for timing. however, re-instruction was detected as an important factor, since for all groups the second period, after reinstruction, showed lower plaque scores. it is concluded that professional advice and instruction and re-instruction seem more important in order to obtain good plaque control than the choice of toothbrush in subjects with periodontal disease.
Clinical effect of a herbal dentifrice on the control of plaque and gingivitis: a double-blind study
Pannuti, Claudio Mendes;Mattos, Joyce Pereira de;Ranoya, Paula Nini;Jesus, Alberto Martins de;Lotufo, Roberto Fraga Moreira;Romito, Giuseppe Alexandre;
Pesquisa Odontológica Brasileira , 2003, DOI: 10.1590/S1517-74912003000400004
Abstract: the aim of this randomized, double-blind clinical trial was to evaluate the effect of the paradontax dentifrice on the reduction of plaque and gingivitis. subjects were randomly allocated into either the test group (n = 15, paradontax) or the control group (n = 15, standard dentifrice with fluoride). plaque levels were measured using the turesky modification of the quigley & hein plaque index (pi), and gingivitis was evaluated with the gingival index (gi). subjects were asked to brush their teeth with the allocated dentifrice, three times a day, for 21 days. there was no significant difference between groups in relation to the pi and gi medians, at baseline and at the end of the 21-day period. there was no significant reduction in pi in either the test or control groups. there was a significant decrease in gi in the test group. the authors concluded that there was no difference between the dentifrices in the reduction of plaque and gingivitis.
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