objective: microbial plaque is among the main etiologies of periodontal disease, and tooth brushing with toothpaste is the most commonly used method of plaque control. this study aimed to compare the efficacy of tooth brushing with and without three different dentifrices.   methods: thirty dental students were randomly selected to participate in this clinical trial and were asked to refrain fro...

Abstract Introduction: This study aimed to determine the prevalence of dental caries and plaque in patients undergoing removable orthodontic treatment.  Materials and Methods: In this cross-sectional study, 57 patients were selected and examined for dental caries (clinically and radiographically) and plaque (O’Leary Index) on permanent and primary teeth. Data were analyzed using chi-square an...

This in vivo study assessed plaque pH in subjects following the consumption of different dairy products. After receiving parental consent to participate, subjects (12-15 years old) were asked to refrain from brushing their teeth for 48 hours prior to the study. At baseline, plaque pH was determined at 4 different sites. Each of the subjects was then assigned randomly to 1 of 4 subgroups and eac...

In this study we investigated the effect of previous diet on the response of plaque pH to three test foods. The study population consisted of 11 dental students. Plaque pH was measured, by means of the touch electrode method, on the first two upper molars. The study was conducted at two sessions, one week apart. Subjects followed a 48-hour high-sugar diet before the first test session and a 48-...

BACKGROUND The goal of this study was to identify the in vivo effects in patients with hyposalivation of a novel slowly dissolving adhering test disc upon on enamel remineralization, oral biofilm, salivary production, pH and buffering, gingival health, and on self-evaluation of oral well-being. METHODS Five subjects with xerostomia wore custom made retainers carrying 5 demineralized enamel ch...

BACKGROUND Dental caries is the single most prevalent and costly infectious disease worldwide, affecting more than 90% of the population in the U.S. The development of dental cavities requires the colonization of the tooth surface by acid-producing bacteria, such as Streptococcus mutans. Saliva bicarbonate constitutes the main buffering system which neutralizes the pH fall generated by the plaq...

In contemporary dental practice, the role of dental plaque fermentation in the dental caries disease process is well understood, but difficult to assay for and to demonstrate to patients as an educational and motivational tool. This paper provides an overview of the current concepts of dental plaque fermentation with reference to the health/unhealthy biofilm concept of dental plaque. It explain...

The quality of dental care and modern achievements in dental science depend strongly on understanding the properties of teeth and the basic principles and mechanisms involved in their interaction with surrounding media. Erosion is a disorder to which such properties as structural features of tooth, physiological properties of saliva, and extrinsic and intrinsic acidic sources and habits contrib...

BACKGROUND Data on the role of dental plaque in the transmission of Helicobacter pylori have varied. Furthermore, there has been few reports on the relationship between dental plaque control and H. pylori infection of gastric mucosa. The purpose of this study was to elucidate this potential relationship. METHODS The (13)C urea breath test was conducted on 56 subjects who received dental plaqu...

End-product inhibition of acid production in Streptococcus mutans R9 was investigated by measuring effects of varying concentrations of H+ and of undissociated lactic or acetic acids on acid production rates in the pH stat. H+ caused purely uncompetitive inhibition (inhibition constant Kiu 0.018 mmol 1(-1). Lactic acid caused mixed inhibition with inhibition constants of Kiu 4.24 mmol 1(-1) and...