Objectives: Evaluating the fracture resistance and failure mode of human maxillary premolars restored with two ceramic onlay materials prepared preparation designs. Materials methods: A total 40 extracted, were selected divided into groups according to design; Group A: MOD cavity anatomical reduction functional cusp F: flat cusp. Each group was subgroups material construction; Subgroup S: using...

Aim: The purpose of this study is to compare the marginal fit crowns manufactured using different CAD/CAM materials on 2 types finish line design.Material and Method: Tooth preparations were made by creating lines (rounded shoulder, chamfer) an acrylic mandibular second premolar model. Impressions taken each preparation polyvinylsiloxane impression material, blocks with three compositions inclu...

Background: This study compared microleakage of Class II cavities restored using bonded-base and bulk-fill techniques with different bases. Materials Methods: In this in vitro study, 60 extracted human molars, standardized (4 mm × 2 8 mm) were prepared, such that the gingival floor was located 1 below CEJ. The teeth randomly divided into five groups filled with: (1) Fuji LC + x-tra fil, (2) Ion...

The aim of this study was to evaluate the effect nicotine lozenge on teeth staining with/without bleaching in animal model study. A total 15 Wistar rats were exposed an acrylic container 10 cigarettes smoke three times a day for 8 minutes per time, and sacrificed after 60 days. 30 incisor treated (n=10) as following: Group-1: in-office bleaching, at-home immersion artificial saliva; group-2: at...

The work is aimed at experimental research and description of the mechanical behavior degradation fibrous structural composite material strength properties during thermal moisture aging in aggressive (operational) environments different duration temperatures. object study was STEF fiberglass. a laminated fiberglass reinforced plastic obtained by hot pressing glass fabric impregnated with thermo...

In recent years, attention has focused on studies about myrmecofauna in urban environments, due to its high possibility of causing damage food storage and household structures. Thus, the objective this study was identify genera ants analyze their frequency diversity two neighborhoods municipality Barreiras-BA. The conducted Riachinho neighborhood, located edge perimeter Renato Gonçalves neighbo...

Objectives: To evaluate the influence of surface treatment and adhesive system on shear bond strength failure mode orthodontic brackets bonded to polymethylmethacrylate surfaces. Methods: Ninety metal (n=15) were aged discs SR Ivocron subjected three conditions (no treatment; sandblasting with 50-?m aluminum oxide; roughening a tungsten bur), using two combinations adhesives (methylmethacrylate...

Purpose: To assess the shear bond strength (SBS) and adhesive remnant index score (ARI) of different primers in dry condition wet conditions.
 Materials Methods: A total 80 human premolars which are free from caries, cracks, fine lines were collected mounted on acrylic. These teeth randomly distributed into two groups (Assure Plus Transbond XT/MIP). Each group was again reassigned subgroup...

Abstract Charophyceae are the most complex streptophyte algae, possessing tissue‐like structures, rhizoids and a cellulose‐pectin‐based cell wall akin to embryophytes. Together with Zygnematophyceae Coleochaetophycae, form grade in which share last common ancestor land plants. The availability of genomic data, its short life cycle, ease non‐sterile cultivation laboratory have made species Chara...