Herein, the finite elements analysis (FEA) numerical study investigated absorption–dissipation ability of dental tissues under orthodontic forces, during movements and periodontal breakdown process. Additionally, we correctness FEA boundary assumptions up to 2.4 N loads. Eighty-one models second lower premolar were subjected 810 simulations using Tresca failure criterion 0.6 N, 1.2 five movements: intrusion, extrusion, rotation, tipping, translation. The results showed that both coronal...

Background and Objectives: This numerical analysis investigated the biomechanical behavior of mandibular bone as a structure subjected to 0.5 N orthodontic force during periodontal breakdown. Additionally, suitability five most used failure criteria (Von Mises (VM), Tresca (T), maximum principal (S1), minimum (S3), hydrostatic pressure (HP)) for study was assessed, single criterion identified teeth surrounding periodontium (by performing correlations with other FEA studies). Materials...

The intent of the KAP (knowledge, attitude, practices) survey is to collect information about a specific target group related their knowledge, what they consider be known, and do particular topic. aim this study was identify level importance oral health, especially attitude practices rural patients around Cluj-Napoca, Romania.A questionnaire consisting five parts used, trying assess self-perception knowledge towards dental hygiene eating habits. A clinical examination also performed in order...

This study assessed the stress distribution (in eighty-one 3D models of second lower premolar) in a stainless-steel bracket and enamel crown under 0.5 N intrusion, extrusion, rotation, translation, tipping during horizontal periodontal breakdown 0–8 mm. The FEA simulations (totaling 405) employed five failure criteria adequacy accuracy Von Mises (VM), Tresca (T), Maximum Principal (S1), Minimum (S3), Hydrostatic Pressure. T VM showed no change display areas breakdown, seeming to be more...

(1) Background: Herein, finite element analysis (FEA) of the periodontal ligament (PDL) was used to assess differences between Tresca (T-non-homogenous) and Von Mises (VM-homogenous) criterion, by simulating a 0–8 mm breakdown under five orthodontic movements (extrusion, intrusion, rotation, tipping, translation) three loads (0.6, 1.2, 2.4 N). Additionally, we addressed issues proper boundary condition selection for more than 1 N correlated results with maximum hydrostatic pressure (MHP)...

Background and aims. In recent years, dental trauma has been on the rise. The most common, regarding permanent dentition, are uncomplicated fractures (involving enamel or dentin) of maxillary central incisors, followed by lateral incisors mandibular incisors. anterior teeth, high impact stresses frequently produced because this it is necessary that restoration a fracture resistance. aim study to evaluate influence marginal cavity preparations (45° bevel chamfer bevel) resistance teeth...

Background/Objectives: Most orthodontic forces are absorbed–dissipated before reaching the dental pulp and its neuro-vascular bundle (NVB); nonetheless, no data available about this issue during periodontal breakdown. The current study’s objective was to investigate how much force reaches NVB movements in Methods: Herein, an assessment performed on second lower premolar of nine patients (72 3D models) included 1440 numerical simulations. A gradual horizontal breakdown (1–8 mm loss)...

Background and objectives: Post-operative pain (POP) is a common complication after root canal treatment influenced by various clinical patient-related factors. The present study evaluated the incidence intensity of POP following using bioceramic sealer, performed operators with different levels experience. Material methods: A total 115 patients were included in this prospective observational study. Patients treated experience: postgraduate students (PGSs) endodontic specialists (ESs)....

This finite elements analysis (FEA) assessed the accuracy of maximum shear stress criteria (Tresca) in study orthodontic internal surface resorption and absorption-dissipation ability dental tissues. The present was conducted over eighty-one models totaling 324 simulations with various bone loss levels (0-8 mm), where 0.6 N 1.2 were applied intrusion, extrusion, rotation, tipping, translation movements. Tresca displayed localized high-stress areas prone to for all situations, better visible...

Abstract Background Dentists are susceptible to musculoskeletal disorders due prolonged static postures during dental treatments. Using a magnification tool like operating microscope (DOM) or the loupes may correct operator's posture. Up until now, few studies have focused on preclinical students' posture when working with DOM, while most of them loupes. The aim this study was comparatively analyse students restoration procedure, two different methods. Materials and methods This used...

Background and Objectives: The aim of this study was to compare the accuracy three types electronic apex locators (EALs) when two different concentrations NaOCl irrigation solutions are used by operators. Materials Methods: After creating access cavities for 20 single rooted extracted teeth, actual canal length (ACL) each determined visually using a #10 file magnification. teeth were subsequently inserted in plastic molds filled with alginate. measurement root (EWL) performed locators: Root...

Background and Objectives: Stage IV grade C localized periodontitis (pre-puberal aggressive periodontitis/LPP) is a rare form of inflammatory periodontal disease occurring in clinically healthy individuals (no/small calculus/dental plaque traces), due hyper-aggressive auto-immune response to high amounts bacteria present the oral cavity. Case Presentation: This case report describes 4-year-old Caucasian girl with gingival inflammation advanced bone loss around temporary lower left canine....

(1) Background: This study aimed to assess the periodontitis burden in systemic sclerosis patients and possible association between them, degree which some potential risk factors two diagnostic biomarkers may account for this association. (2) Methods: cross-sectional included a test group (systemic patients) control (non-systemic patients). Both groups benefited from medical, periodontal examination saliva sampling determine salivary flow rate inflammatory (calprotectin, psoriasin). A...

Dental caries is an avoidable and complex condition impacting billions of individuals worldwide, posing a specific concern among younger generations, despite the progress oral hygiene products. This deterioration occurs due to acid demineralization tooth enamel, leading loss minerals from enamel subsurface. The remineralisation early carious lesions could prevent cavitation teeth. protein amelogenin constitutes 90% total matrix plays key role in bio mineralisation process. aim this study...

Background: Adhesion within endodontic obturation material and root canal walls improves the efficacy of treatment by establishing a barrier that inhibits reinfection entombs residual bacteria. This study evaluates push-out bond strength (POBS) calcium silicate sealers compared to an epoxy-resin-based sealer. Methods: A total 36 extracted mono-radicular teeth were prepared with Pro Taper Ultimate irrigated 5.25% sodium hypochlorite 17% EDTA. The specimens randomly split into three groups (n...

Background and Objectives: Most orthodontic forces are absorbed–dissipated before reaching the dental pulp its neuro-vascular bundle (NVB); however, no data available about their amounts. The objective of this study was to assess amount force that reaches NVB during movements in a healthy periodontium. Materials Methods: This involved second lower premolars nine patients 180 numerical simulations. Five (intrusion, extrusion, rotation, translation, tipping) under 0.5 N/5 KPa 4 N/40 were...

The aim of this in vitro study was to assess the effect toothpastes, with different compositions, on optical and morphological features sound demineralized enamel. We selected twenty-five teeth, recently extracted for orthodontic purposes, study. teeth were caries free, without stains, fissures, filling or hypoplasia observed at inspection under standard conditions. Teeth brushed (for 2-3 min, twice a day, 21 days), five toothpastes (four commercially available an experimental one)...

Among esthetic procedures, teeth whitening is a common and often used treatment for patients who seek good appearance. We developed an experimental green tea extract gel enamel restoring after bleaching. also tested the antibacterial antifungal effect of against specific endodontic cariogenic microorganisms. The action was determined by disk-diffusion method using Peptostreptococcus anaerobius (ATCC27337), Corynebacterium xerosis (ATCC 373), Streptococcus mutans 25175) Candida albicans...

In Romania, systematic information on the occurrence of oral diseases in children is scarce. The purpose present study was to describe prevalence and pattern dental caries schoolchildren, use data provide a baseline for planning evaluation health care. A national sample at grade 1 (n = 729) 6 660) chosen consistent with WHO pathfinder principle. Clinical examinations were carried out according recording system Danish Municipal Dental Service following results obtained. (7-yr-olds) proportion...

The current study aims to evaluate, using scanning electronic microscopy, the sealing ability of two bioceramic endodontic sealers, one consecrated and experimental.Twenty monoradicular teeth were included in study. endodontically prepared at working length. shaping cleaning involved use chelating gel MM EDTA 19% continuous irrigation with sodium hypochlorite 2.5%. radicular filling was performed gutta-percha association a sealer. Ten filled material others ten experimental based sealer.The...

Do the new, modern dental resin composites improve sealing in cavities restorations? The present study was designed to compare effect of two different, but most used layering techniques composite reducing marginal microleakage when a brand-new material is used; Class I black were prepared on 120 human extracted teeth and then restored using oblique horizontal technique. dye penetration analysis, atomic force microscopy (AFM), scanning electron (SEM) together with energy-dispersive X-ray...

The aim of the present study was to obtain experimental infiltration materials, intended for treatment dental white spots, and investigate them. Two series infiltrants (P1-P6)/(P1F-P6F) were obtained, based on different monomer mixtures, without/with glass filler (with fluoride release ability). Each infiltrant from second contained same amount powder, each (P-PF) group resin composition. characteristics investigated by degree conversion (DC), mechanical strength, water sorption (WS),...

Orthodontic treatment can be effective only with the proper adhesion strength of bonded elements on teeth. The aim study was to analyze influence different remineralization products brackets (Evolve Low Profile Brackets 0.022 Roth prescription (DB Orthodontics Ltd., Silsden, England) shear bond (SBS)). In all, 40 teeth were investigated for this study; n = 30 demineralized (immersed in 0.1% citric acid min, twice a day, 20 consecutive days) and 10 immersed artificial saliva. After...