Geographic information system and multilevel analysis: gingival status among 12-year-old schoolchildren in São Paulo, Brazil.

Objective: To evaluate gingival and calculus status among schoolchildren 12 years of age using a geographic information system and multilevel analysis.

Methods: A total of 1 002 schoolchildren were selected from 18 municipal districts by means of cluster sampling, from among 25 public and private schools in Piracicaba, São Paulo, Brazil, in 2005. Examinations were carried out by a single calibrated examiner utilizing the criteria of the World Health Organization, as well as the Community Periodontal Index.

A cohort study of caries incidence and baseline socioeconomic, clinical and demographic variables: a Kaplan-Meier survival analysis.

Purpose: To determine the incidence of dental caries and evaluate the influence of socioeconomic, clinical and demographic variables on the time for disease to appear in the permanent teeth after 3 years of follow-up.

Materials And Methods: The random sample of this cohort study consisted of 427 5-year-old preschool children attending 22 public preschools in Piracicaba, SP, Brazil. Dental caries was measured using the dmf/DMF indices.

[Sample size and costs estimate in epidemiological survey of dental caries].

This study aimed to analyze how the prevalence and the distribution of dental caries influence the sample size in epidemiological surveys, and how much are the costs. Secondary data of oral health surveys in 12-year-old schoolchildren from Bauru in 1976, 1984, 1990, 1994, and 2001, and from Piracicaba in 2001 and 2005 were studied. Sample sizes were estimated taking into account the mean DMFT and standard deviation of each survey, establishing sampling errors of 1%, 2%, 5%, and 10%.

Validity of caries-detection methods under epidemiological setting.

Purpose: To evaluate the validity of the visual exam and adjunct diagnostic technologies for posterior permanent teeth under epidemiological conditions.

Methods: A probabilistic sample of 165 12-year-old schoolchildren from Piracicaba, São Paulo, Brazil, was examined by visual exam (VI1), visual exam + artificial lighting (VI2), bitewing (BW), fiber optic transillumination (FOTI), DIAGNOdent and the associations among them. The D1+D3 and D3 diagnostics criteria, under epidemiological conditions, were adopted.

Reproducibility of adjunct techniques for diagnosis of dental caries in an epidemiological situation.

Purpose: To evaluate the reproducibility of visual exams under natural light (VE1), visual exams under artificial light (VE2), radiographic bitewing exams (BW), fibre optic transillumination exams (FOTI) and DIAGNOdent exams (DD) in epidemiological settings.

Materials And Methods: Three examiners and one benchmark examiner examined thirteen 12-year-old schoolchildren under epidemiological conditions for the D3 (carious lesions in dentin) and D1+D3 (carious lesions in enamel or dentin) diagnostic criteria.

Results: The reproducibility (intra/interexaminer agreement) under both diagnostic criteria was 'almost perfect' for the exams VE1 (D3: κintra = 0.

Diagnosis of secondary caries in esthetic restorations: influence of the incidence vertical angle of the X-ray beam.

The aim of this study was to evaluate the accuracy on the diagnosis of secondary caries-like lesions simulated on esthetic restorations of different materials, changing the incidence vertical angle (IVA) of the x-ray beam. Twenty human teeth received MOD inlay preparations. In the experimental group (n=10), a round cavity was made in the floor of the proximal box to simulate the caries-like lesion.

Assessment of caries experience in 12-year-old adolescents in Piracicaba, Sao Paulo, Brazil.

Purpose: The aim of the present study was to analyse the association between socioeconomic and behavioural factors and the presence of active non-cavitated caries lesions in 12-year-old adolescents in Piracicaba, São Paulo, Brazil.

Materials And Methods: A cross-sectional study was carried out in 1001, 12-year-old adolescents who were selected by the cluster sampling method. A modified version of the World Health Organization criteria for identifying lesions including white lesions (WL) in enamel was used.

Risk indicators of temporomandibular disorder incidences in early adolescence.

Purpose: Although temporomandibular disorder (TMD) has been presumed to be a condition affecting adults, studies have reported the presence of signs and symptoms in children. The purpose of this paper was to verify the influence of gender, mother's gestational behavior, malocclusion, and oral habits as risk indicators for TMD in 12-year-old adolescents.

Methods: TMD pain was assessed by research diagnostic criteria for temporomandibular disorders (RDC/TMD; axis I).

Geographic information systems (GIS) in assessing dental health.

The present study investigated the distribution profile of dental caries and its association with areas of social deprivation at the individual and contextual level. The cluster sample consisted of 1,002 12-year-old schoolchildren from Piracicaba, SP, Brazil. The DMFT Index was used for dental caries and the Care Index was used to determine access to dental services.

Sugar consumption and dental health: Is there a correlation?

This study investigated the correlation between sugar consumption and dental caries in a random sample of 184 schoolchildren (all 12 years of age) from public and private schools in Piracicaba, Brazil. A seven-day diet record was administered in a cross-sectional survey. Diet records were used to determine the frequency of sugar consumption both during and between meals.

Relationships of beta-blockers and anxiolytics intake and salivary secretion, masticatory performance and taste perception.

Objective: Assess the influence of salivary flow on physiological parameters of the stomatognathic system in patients who take beta-blockers or anxiolytic medications.

Design: Sixty patients were divided into three groups based on the following criteria: Group 1, control (n=20; no use of medication); Group 2, use of antihypertensive beta-blockers (n=20); and Group 3, use of benzodiazepine anxiolytics (n=20). Salivary flow was assessed by determining stimulated and non-stimulated flow/minute.

Risk indicators for signs and symptoms of temporomandibular dysfunction in children.

Objectives: The aim of this study was to determine the risk indicators for signs and symptoms of temporomandibular dysfunction (TMD) in children between 4 and 12 years of age.

Study Design: One hundred six patients were assessed for the following variables: (1) signs and symptoms of TMD (deviation when opening mouth, joint noises, limitation of movement, pain in the mandible or during movement), (2) dentition and occlusal abnormalities, and 3) habits (pacifier sucking, nonnutritive sucking, finger sucking, nail biting, and teeth grinding (bruxing). Multivariate logistic regression was performed with the level of significance set at P < 0.

Psychological factors and the incidence of temporomandibular disorders in early adolescence.

The purpose of the present study was to evaluate the relationship between psychological variables and the clinical diagnosis of temporomandbular disorders (TMD) in 12-year-old adolescents. TMD pain was assessed by RDC/TMD examination (Research Diagnostic Criteria for Temporomandibular Disorders) (Axis I and II). Five-hundred and fifty-eight subjects (330 girls and 228 boys) were examined.

Estimate of DMFT index using teeth most affected by dental caries in twelve-year-old children.

The objective of the study was to develop regression models to describe the epidemiological profile of dental caries in 12-year-old children in an area of low prevalence of caries. Two distinct random probabilistic samples of schoolchildren (n=1,763) attending public and private schools in Piracicaba, Southeastern Brazil, were studied. Regression models were estimated as a function of the most affected teeth using data collected in 2005 and were validated using a 2001 database.

Risk indicators of gingivitis in 5-year-old Brazilian children.

Purpose: To identify the risk indicators of gingivitis among socioeconomic, clinical and gender variables in 5-year-old children attending preschools in Piracicaba, Brazil, in 2005.

Materials And Methods: The sample consisted of 728 subjects attending 22 public (n = 428) and 18 private (n = 300) preschools. A previously calibrated examiner performed the clinical examination in an outdoor setting, under natural light, using a dental mirror, Community Periodontal Index probe and air-drying.

Dental caries in 12-year-old schoolchildren and its relationship with socioeconomic and behavioural variables.

Purpose: This study attempts to describe the caries experience in 12-year-old schoolchildren in Piracicaba, Brazil, and to verify the relationship between the disease and socioeconomic factors, and behavioural variables related to oral health.

Materials And Methods: The random sample consisted of 939 individuals from public and private schools in Piracicaba, São Paulo State, Brazil, in 2005. A calibrated dentist performed the examination in an outdoor setting, under natural light, using CPI probes and mirrors, following WHO recommendations.