Association of Drug Use and Erosive Tooth Wear in Prisoners: A Cross-Sectional Study.

Introduction: The present study evaluated the association between drug use and erosive tooth wear (ETW) in prisoners.

Methods: This is a cross-sectional, descriptive, and analytical research carried out in Southern Brazil. Data collection took place through the application of questionnaires and clinical examination.

Fatigue and marginal adaptation of bulk fill restoratives: Effect of the layering technique and cavity dimension of extensively damaged teeth.

Objectives: To evaluate the effect of layering technique and cavity dimension on the fatigue behavior and marginal adaptation of bulk fill (BF) restorations in extensively damaged teeth.

Methods: Seventy-two premolars received class II cavities (MOD) followed by endodontic treatment. Half sample had 1/3 of their palatal cusp removed.

School type and oral conditions associated with school performance and absenteeism in adolescents: A multilevel analysis.

Background: Investigations assessing how oral health status affects school performance and attendance considering individual and community variables are lacking.

Aim: To analyze the association of school contextual factors and oral conditions with school performance and absenteeism in early adolescence.

Design: This cross-sectional study was carried out with 593 12-year-old students from 20 schools in Passo Fundo, a southern city in Brazil.

Effectiveness of ultrasonic activation over glycolic acid on microhardness, cohesive strength, flexural strength, and fracture resistance of the root dentin.

Objectives: The aim of this study was to evaluate the effectiveness of ultrasonic activation (US) over glycolic acid on microhardness, cohesive strength, flexural strength, and fracture resistance of root dentin, comparing with conventional final irrigation protocols.

Methods: Samples were obtained from 140 extracted bovine teeth and distributed into four test groups: microhardness (50 teeth), cohesive strength (15 teeth), flexural strength (15 teeth), and fracture resistance (60 teeth). In all four tests, specimens were subdivided into five groups, according to final irrigation protocols: G1: distilled water (DW); G2: 17% ethylenediaminetetraacetic acid (EDTA); G3: 17% glycolic acid (GA); G4: 17% EDTA + US; and G5: 17% GA + US.

Maxillary Labial Frenum in Preschool Children: Variations, Anomalies and Associated Factors.

Objective: To investigate the prevalence of morphological and attachment variations of the maxillary labial frenum (MLF) and associated factors in preschool children.

Study Design: A cross-sectional study was conducted with 1,313 children aged between zero and five years of age attending public nurseries in the city of Canoas in southern Brazil. Data were collected through a questionnaire addressing demographic, socioeconomic, and behavioral characteristics and a clinical examination of the MLF.