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Showing 5 results for Dental Plaque

Sh. Jafari , N.  ebrahimi-E- Daryani , S. Zeinali, M.  motalleb Nejad ,
Volume 14, Issue 2 (8-2001)

Helicobacter pylori infection causes gastric and duodenal ulcer. However recurrence of infection after eradication would suggest the existence of other reinfecting sources in the gastrointestinal tract (Gl). The aim of this study was to assess the existence ofhelicobacter pylori in dental plaques of patients harboring Helicobacter pylori in their GI tract. Antral biopsies were taken from 40 patients with Gl problems and cultured. Samples were also taken from dental plaques of patients with positive Helicobacter pylori culture under microaerophilic conditions and evaluated by polymerase chain reaction (PCR) reamplification. The mean age of patients was 40 years 24 (60%) male and 16 (40%) female. The results obtained from dental plaque cultures, which analysed by PCR were all negative, however 7 (17.5%) cases were found positive by PCR reamplification. The results showed that Helicobacter pylori could exist in dental plaque and PCR reamplification could be used for its detection as a more sensitive technique. More research should be conducted to examine any relation between the existence of Helicobacter pylori in dental plaques and recurrent GI disorders.
M. Saghazadeh , Ao. Navidi ,
Volume 19, Issue 4 (1-2007)

Background and Aim: Although toothbrushing is still the most effective method in plaque reduction, it is insufficient for total plaque removal. Considering this limitation, it is suggested that toothbrushing could be aided by chemical methods. For this purpose, it is advised to use some kind of mouthrinses before toothbrushing to increase the rate of microbial plaque removal. Several prebrushing mouthrinses are available in the market and comparing their efficiency is valuable for dentists. The aim of this study was to investigate and compare the effect of two prebrushing mouthrinses, Plax and Irsha, on dental plaque reduction.

Materials and Methods: This clinical trial was carried out as an interventional and triple blind protocol, using completely random block design. For this purpose, questionnaire and initial examination chart was filled for 50 healthy volunteers between the age of 18 and 40 years and finally 30 individuals were selected based on the inclusion/exclusion criteria. If scaling and polishing was necessary, it was performed at least 2 weeks before starting the main program. Then, each volunteer participated in a 4 steps program, including one step toothbrushing without use of mouthrinse and three steps toothbrushing after use of one of the mouthrinses (Plax, Irsha, Placebo). Data were analyzed by SPSS software using factorial analysis, ANOVA and Tukey’s multiple comparison tests with p<0.05 as the limit of significance.

Results: Toothbrushing without use of mouthrinse decreased the amount of plaque, significantly (P<0.0001). Use of mouthrinse without toothbrushing decreased the amount of plaque significantly (P<0.0001). The amount of plaque reduction after use of various mouthrinses (Plax, Irsha, Placebo) showed no statistical differences (P=0.761). Use of the mouthrinses before toothbrushing, had no statistically significant effect on the final results after toothbrushing (P=0.331).

Conclusion: According to the findings of the present study, although using mouthrinses decrease the amount of dental plaque significantly, but the prebrushing mouthrinse didn't show statistically significant effect on final result after toothbrushing.

M. Karami Nogourani, M. Banihashemi,
Volume 23, Issue 1 (6-2010)

Background and Aims: Studies show that sucrose containing chewing gums are cariogenic. The aim of this study was to evaluate the effect of two commercial chewing gums with and without sucrose on dental plaque accumulation compared with the control group.

Materials and Methods: In this clinical study, plaque accumulation during three 7-day periods (with two weeks interval) was recorded (Sillness & Loe Index) in a group of 23 volunteer male dental students who chewed in the first two periods sugar-free or sugar-containing chewing gums (Olips and Orbit, respectively) and in the last period did not chew any gum. Participants were asked to chew daily five gum sticks after meals for about twenty minutes. The data were statistically analyzed using Repeated Measure ANOVA and paired-T test.

Results: The results showed that chewing any gum even sucrose-containing gum decreased the level of dental plaque accumulation (P<0.001). However, the decreasing effect of sugar-free gums was significantly higher (P<0.001).

Conclusion: Although sugar free gum was more effective than sugar containing gum on reducing dental plaque accumulation, chewing even sugar containing gums could decrease the level of dental plaque.

Yalda Elham, Neda Moslemi, Hoda Barati,
Volume 31, Issue 4 (1-2019)

Background and Aims: Lichen planus is a chronic inflammatory mucocutaneous disease with unknown etiology. One of the most common manifestations of patients with oral lichen planus is gingival involvement in the form of generalized erythematous areas. The aim of this study was to review the articles evaluating the role of plaque control on the gingival manifestations of oral lichen planus.
Materials and Methods: Motor searches of Ovid Medline and EM base databases, PubMed, Google Scholar, and Science Direct were searched for article published between January 1990 and December 2017 using of relevant key words. After reviewing the abstracts of articles, 20 full articles were selected and among them, 7 relevant articles were reviewed in this study.
Conclusion: From the literature, it was concluded that effective plaque control is the main part of lesions treatment and improvement of symptoms and gingival manifestations of oral Lichen planus.

Farzad Imamverdy, Reza Yazdani,
Volume 35, Issue 0 (5-2022)

Background and Aims: The most effective way to maintain and improve oral health is tooth brushing to physically remove dental plaque. In this regard, this study was conducted to compare the efficiency of the usual method of each person in comparison with different methods of brushing to remove dental plaque.
Materials and Methods: This study was conducted in 2020, as a randomized and open clinical trial with 72 non-dental male and female students of Tehran University of Medical Sciences. In this study, the usual method of tooth brushing with Modified Bass and Scrub Horizontal methods after training was evaluated in two random groups with plaque and gingival indices. Plaque index as a percentage and gingival index as a number (numbers between 0-1 mild inflammation, 1.1-2 moderate inflammation, 2-3 severe inflammation) were reported. The results were analyzed using SPSS25 software and paired t-test and variance equality test.
Results: The efficiency of the usual tooth brushing method in comparison with the two Modified Bass and Scrub Horizontal methods using two indicators of dental plaque and gingival indices was not statistically significant (P>0.05). Each method alone after tooth brushing significantly removed dental plaque (P<0.05).
Conclusion: The results of this study showed that the efficiency of the usual method of tooth brushing compared to trained methods in removing dental plaque and reducing gingivitis in short-term evaluation was not statistically significant.

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