Evaluation of the effect of two types of laser on the growth of streptococcus mutans.

This study was done to compare the antibacterial effect of Photodynamic therapy (PDT) on streptococcus mutans (S. mutans) using two different light sources and photosensitizers (PS). Materials and methods: Five groups were studied in this research:no light and no toluidine blue ortho (TBO) as PS for control group, irradiation only (CO2 laser or Nd:YAG laser), and irradiation with PS (CO2 laser and TBO or Nd:YAG laser and TBO). Standard suspensions of S. mutans, based on the type of group, were used in different PDTs. Bacterial suspension from each treatment was subcultured onto the surface of Mueller-Hinton agar plates, and bacterial growth was assessed. The results were analyzed by analysis of variance (ANOVA). Results: There was a statistically significant reduction in the viability of S. mutans in TBO with CO2 laser and TBO with Nd:YAG laser groups (p value
Source: Laser Therapy - Category: Laser Surgery Tags: Laser Ther Source Type: research

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Conclusion: It was concluded that the marginal infiltration of primary molars sealed with microhybrid composite resin and resin flow was not influenced by the removal -or not -of the carious tissu e or the material used.RESUMO Objetivo: Avaliar o selamento de cavidades de les ões de cárie oclusais em dentina, reproduzidas in vitro, com resina flow comparando com restaurações em cavidades com dentina hígida utilizando resina composta microhíbrida. Métodos: Foram selecionados 27 molares decíduos hígidos, realizadas cavidades de aproximadamente 2 mm na regiã...
Source: RGO - Revista Gaucha de Odontologia - Category: Dentistry Source Type: research
ABSTRACT Objective: To study the impact of dental trauma on the oral health-related quality of life among Brazilian students. Methods: A cross-sectional study involving a representative sample of students of the public schools (n = 435) in a city in southern Brazil was carried out. Data on dental trauma were collected through oral examinations using the O ’ Brien ’ s criteria (1993) restricted to fractures and avulsions. The Brazilian version of the Oral Impacts on Daily Performances (OIDP) was used in order to collect data on the impact of oral health-related quality of life. Bivariate and multivariate analysi...
Source: RGO - Revista Gaucha de Odontologia - Category: Dentistry Source Type: research
Abstract The aim of this study was to assess the prevalence and discriminate the associated factors between enamel fractures and other trauma/trauma sequelae in 8 to 10-year-old Brazilian schoolchildren. A representative sample of 1,201 children from public and private schools were enrolled in this cross-sectional study. Questionnaires about sociodemographic characteristics were answered by parents. The outcome variable (traumatic dental injury, TDI) was multi-categorized. Independent individual variables were sex, age, number of residents in household, parents/caregivers ’ level of education, family income, dental c...
Source: Brazilian Oral Research - Category: Dentistry Source Type: research
International Dental Journal, EarlyView.
Source: International Dental Journal - Category: Dentistry Authors: Source Type: research
ConclusionsSevere untreated dental caries with clinical consequences had a negative impact on the children ’s OHRQoL, regardless of toothache and socioeconomic factors.
Source: Quality of Life Research - Category: Health Management Source Type: research
Radiography is a regularly used and accepted adjunct to visual examination in the diagnosis of dental caries. It is assumed that not using radiographs can lead to underestimation of dental caries experience wi...
Source: BMC Oral Health - Category: Dentistry Authors: Tags: Research article Source Type: research
The World Health Organization guideline to use less sugar may be an opportunity and support for dentistry in its goal to get the message of using less sugar across to the public. Two ways (with all the combinations of these) to achieve a reduction of sugar consumption are the reduction of the amount of sugar in products or the reduction of the frequency of consumption of sugar-containing products. Which sugar-reducing strategy is best for caries prevention? To answer this question, this manuscript discusses the shape of the dose-response association between sugar intake and caries, the influence of fluoridated toothpaste o...
Source: Caries Research - Category: Dentistry Source Type: research
Conclusion: The PALS appears to be a fast, feasible and reliable dietary screener in a clinical setting to assist in forming tailored diet-related messages for dental caries and obesity prevention.Caries Res 2019;53:153 –159
Source: Caries Research - Category: Dentistry Source Type: research
Publication date: Available online 7 August 2018Source: Journal of Photochemistry and Photobiology B: BiologyAuthor(s): Keisuke Nakamura, Taichi Tenkumo, Takayuki Mokudai, Midori Shirato, Kirika Ishiyama, Taro Kanno, Keiichi Sasaki, Yoshimi NiwanoAbstractAntimicrobial chemotherapy based on ultraviolet-A (UVA) irradiation of polyphenol solution has been proposed as an adjunctive treatment for dental caries. However, the safety of this treatment has not been thoroughly evaluated. Therefore, the aim of the present study was to assess the influence of this treatment on the oral mucosa in hamsters and wounded skin in rats. An o...
Source: Journal of Photochemistry and Photobiology B: Biology - Category: Speech-Language Pathology Source Type: research
The World Health Organization (WHO) recommends a reduced intake of free sugars throughout the life course (strong recommendation) with a reduction of free sugars intake to less than 10% of the total energy intake (strong recommendation) and preferably below 5% of the total energy intake (conditional recommendation) in both adults and children. Available data clearly show that people already consume significantly more sugar than they should, increasing the risk for dental caries, overweight and obesity. The WHO recommendations are intended for use by the policy makers as a benchmark for assessing intake of sugars  by p...
Source: Caries Research - Category: Dentistry Source Type: research
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