Detection of misfits at the abutment-prosthesis interface in the esthetic zone: Implications of the radiographic technique and the magnitude of the misfit.

Statement Of Problem: Misfits in the abutment-prosthesis interface represent a setback for implant-supported prostheses. Periapical radiographs have been used as an auxiliary method in the evaluation of prosthesis fit to the abutments; however, the evidence supporting the use of this method is still restricted to studies of low to moderate quality. Furthermore, studies on the diagnostic accuracy of different periapical techniques used to detect misfits in the abutment-prosthesis interface, especially in the esthetic zone, are lacking.

Influence of chlorhexidine, propolis, pulpal pressure simulation, and aging on dentin bond strength.

The present study evaluated the bond strength (μTBS) of dentin treated with chlorhexidine and propolis subjected to simulated pulpal pressure (SPP) and thermocycle aging. One hundred and twenty healthy human molars were sectioned to obtain 2 mm of dentin thickness and were divided into two groups (n = 60): SPP (15 cm H O) and no SPP (Control group). Dentin surfaces were conditioned with 37% phosphoric acid for 15 s and were divided according to the dentin treatment (n = 20): Control; Chlorhexidine gluconate (0.

How Water Content Can Influence the Chemomechanical Properties and Physical Degradation under Aging of Experimental Adhesives.

Objective: To evaluate the physicochemical (sorption (SOR), solubility (SOL), and degree of conversion (DC)) and mechanical (flexural strength (FS), modulus of elasticity (ME), and compressive strength (CS)) properties of adhesives with different water contents (DO).

Materials And Methods: An adhesive was formulated: 55 wt% BisGMA, 45 wt% HEMA, 0.5 wt% camphorquinone, 0.

Linear dimensional accuracy of stereolithographic surgical guide after chemistry and physics sterilization.

Objectives: The purpose of this study was to evaluate the dimensional stability of prototyped surgical guides after autoclave and 2% glutaraldehyde sterilization processes.

Material And Methods: Twenty prototyped surgical guides were prepared and submitted to two sterilization processes (n = 10): Physics - sterilization by autoclave (saturated water vapor under pressure, temperature of 126 to 130 °C, pressure of 1,7 at 1.9 kgf/cm, 16 min); Chemistry - sterilization by 2% glutaraldehyde for 10 h.

The Importance of Integrated Healthcare in the Association Between Oral Health and Awareness of Periodontitis and Diabetes in Type 2 Diabetics.

Purpose: To assess the association of various factors including education level and oral health with type 2 diabetics' awareness of periodontitis and periodontitis/diabetes relationship, and to evaluate the importance of integrated healthcare in this association. Materials and Methods: 288 type 2 diabetics were evaluated through a validated structured questionnaire about oral hygiene habits, access and attendance to dental treatment, the presence of periodontitis and previously received information of periodontitis and periodontitis/diabetes relationship. Descriptive data were explored and both simple and multiple logistic regressions were performed.

Esthetic perception of smiles with different gingival conditions.

This study aimed to compare the perceptions of smile esthetics among general practitioners, periodontists, and laypeople. Photographs of smiles were taken and digitally modified to create different gingival conditions: gingival asymmetry, unilateral gingival recession, and bilateral gingival recession. These photographs were evaluated by 150 volunteers (19-70 years old) using a 100.

Periodontal Disease and Body Weight Assessment in Children.

Purpose: The purpose of this study was to assess body weight and periodontal disease development in obese and normal weight children.

Methods: Eighty-eight 5- to 10-year-old children participated in this study. Periodontal measurements included the visible plaque index (VPI), community periodontal index (CPI), and bleeding on probing (BOP).

Association between periodontal disease and subclinical atherosclerosis: the ELSA-Brasil study.

The aim of this study was to investigate the relationship between periodontal disease and increased thickness of the carotid artery intima-media complex. A cross-sectional study was conducted with 220 adults (age ≥ 35 years) among participants in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). Carotid artery ultrasound and periodontal clinical examinations were conducted and included visible plaque index, gingival bleeding on probing index, probing pocket depth (PPD), and clinical attachment level (CAL).

Treatment of gingival recession with collagen membrane and DFDBA: a histometric study in dogs.

In a previous study, we evaluated the findings related to the use of resorbable collagen membranes in humans along with DFDBA (demineralized freeze-dried bone allograft). The aim of this subsequent study was to histometrically evaluate in dogs, the healing response of gingival recessions treated with collagen membrane + DFDBA (Guided Tissue Regeneration, GTR) compared to a coronally positioned flap (CPF). Two types of treatment were randomly carried out in a split-mouth study.

Prevalence and features of palato-radicular grooves: an in-vitro study.

The presence of a morphological defect called a palato-radicular groove (PRG) is considered to be an important contributing factor to the development of localized chronic periodontitis, for it favors the accumulation and proliferation of bacterial plaque deep into the periodontium. This anomaly affects maxillary incisors, especially lateral incisors. The prevalence and different morphologic conditions of the PRG were evaluated in 376 maxillary lateral and central incisors.

The relationship of oral malodor in patients with or without periodontal disease.

Background: Halitosis has been correlated with the concentration of volatile sulfur compounds (VSC) produced in the oral cavity by metabolic activity of bacteria colonizing the periodontal area and the dorsum of the tongue. The aim of this study was to determine whether there is some relationship between the presence of N-benzoyl-DL-arginine-2-napthylamide (BANA)-positive species Treponema denticola, Porphyromonas gingivalis, and Bacteroides forsythus and clinical and oral malodor parameters.

Methods: Twenty-one subjects (21 to 59 years old) with probing depths (PD) > 3.