Objective: The aim of this study was to evaluate the effect different surface treatments; sandblasting, Er:YAG, Nd:YAG, or CO2 laser irradiation on shear bond strength (SBS) zirconia ceramic dentin. Background data: Zirconia is not properly luted with resin cements. Various treatment methods have been suggested for obtain high There no that compared types (Er:YAG, CO2) sandblasting SBS between and Methods: One hundred twenty human maxillary third molar teeth were sectioned 3 mm below...

The objective of this study was to evaluate dentin bond strength and microleakage a self-adhering flowable resin with or without adhesive resin.Dentin pieces were randomly assigned three groups (n = 10): Group OR (Optibond+Revolution Formula 2 Flow); VF (Vertise OVF (Optibond+Vertise Flow). Then specimens stressed in shear at cross-head speed 1 mm/min until the failed. Moreover, determined by restoring Class V cavities. A statistical analyses carried out using Mann-Whitney U Kruskal-Wallis...

Objective: The aim of this study was to evaluate the effect different surface treatments: sandblasting, liners, and laser irradiations on shear bond strength (SBS) pre-sintered zirconia veneer ceramic. Background data: SBS between veneering porcelain zirconium oxide (ZrO2) substructure weak. Various treatment methods have been suggested for obtain high porcelain. There is no that evaluated treatments ZrO2 substructure. Methods: Two hundred specimens with 7 mm diameter 3 height blocks were...

To determine the influence of different scanning and ambient light conditions on trueness values an intraoral (IOS) device.The present study was conducted among 20 complete dentate volunteers. After making maxillary arch impressions with vinyl polysiloxane material, type IV dental stone poured, working casts were obtained. Then, models digitized using a laboratory scanner (LS) standard tessellation language (STL) files acquired. Full digital scans volunteers also performed IOS device 2 (RL:...

The objective of the present study was to investigate presence SARS-CoV-2 in aerosol and COVID-19 contamination distance asssociated with ultrasonic scaling tooth preparation. Twenty-four patients were included this study. Removal supragingival plaque instruments for 10 minutes high-speed air-turbine using simulation cutting maxillary right canine a round diamond bur 5 performed. Patients randomly assigned 2 groups: In group A, medium-volume suction used during treatment. B, high-volume an...

Abstract Purpose Debonding of acrylic teeth from the denture base remains a major problem in prosthodontics. The objective this study was to evaluate effect various surface treatments on shear bond strength two chemically different resins—polymethyl methacrylate (PMMA) and urethane dimethacrylate (UDMA). Materials Methods Two resins, heat‐cured PMMA (Meliodent) light‐activated UDMA (Eclipse), were used study. A total 60 molar randomly separated into four groups (n = 15), according treatment:...

Objective. This study aimed to investigate the effects of different mechanical surface treatments pre-sintered zirconium oxide (ZrO2) in an attempt improve its bonding potential. Materials and methods. One hundred twenty IPS e-max ZirCAD (Ivoclar Vivadent) zirconia blocks (7 mm diameter, 3 height) received six (n = 20): Group C was untreated (control); E Er:YAG laser irradiated; N Nd:YAG SB sandblasted, SN sandblasted SE irradiated. After treatments, average roughness (Ra, µm) each specimen...

Abstract Purpose Denture base resins have the potential to cause cytotoxicity in vivo, and mechanical properties of are affected by water sorption. There is a correlation between residual monomer Thus, purpose this study was evaluate sorption light‐activated urethane dimethacrylate (UDMA) denture resin compared conventional heat‐activated polymethyl methacrylate (PMMA) resin. Materials Methods Two resins, PMMA (Meliodent) UDMA (Eclipse), were used study. Cytotoxicity (5 × 1 mm 2 ) (1...

Purpose. Debonding at the post-adhesive interface is a major problem for quartz fiber posts. The objective of this study was to evaluate surface roughness and bond strength posts after various treatments. Materials methods. Sixty-six were randomly divided into six experimental groups (n = 11) including group C, untreated (control); SB, sandblasted; SC, silica coated; HF, hydrofluoric acid-etched; N, Nd:YAG laser irradiated; E, Er:YAG irradiated. Surface measured before pre-treatment. They...

ABSTRACT Treatment of a patient with amelogenesis imperfecta (AI) presents real problem from both functional and esthetic points view. An result also will in an improvement the patient’s quality life. This clinical report illustrates oral rehabilitation 24‐year‐old man diagnosed hypomature type AI. The aim treatment was to restore esthetics improve masticatory function. Esthetic expectations were successfully attained by placing all‐porcelain crowns canine each arch, 12 total. Moreover,...

Objective: The objectives of this study were to evaluate the microtensile bond strength (μTBS) one-step self-etch adhesive systems Er:YAG laser-irradiated and bur-cut dentin after water storage thermocycling. Background data: laser is a promising alternative method for cavity preparation; however, no has compared effect irradiation aging procedures on adhesion adhesives dentin. Methods: Seventy-two third molars selected randomly divided according preparation (Er:YAG bur-cut). One-step...

The purpose of this study was to investigate the effects various surface pretreatments in ridge lap area acrylic resin denture teeth on shear bond strength heat-polymerized polymethylmethacrylate (PMMA) base resin.Tooth debonding is a major problem for patients with removable prostheses.A total 84 central incisor were used study. Seven test groups 12 specimens each group prepared as follows: untreated (control, C), ground, tungsten carbide bur (group H), airborne-particle abrasion AA),...

Purpose. To evaluate surface roughness and bond strength of glass fiber posts to a resin cement after various treatments. Materials methods. Sixty individually formed with diameter 1.5 mm length 20 were used for this study. They randomly assigned six groups pre-treatment (n = 10/group): Group C, untreated (control); SB, sandblasted; SC, silica coated; HF, hydrofluoric acid-etched; N, Nd:YAG laser irradiated; E, Er:YAG irradiated. Surface the was measured before pre-treatment. The then bonded...

The bond strength of soft denture liner to a recently introduced base resin after thermocycling has not been compared traditional materials. objective this study was investigate the effects on tensile liners two chemically different resins, polymethyl methacrylate (PMMA) and urethane dimethacrylate (UDMA).A total 48 PMMA UDMA test specimens were fabricated by attaching (Molloplast-B, Permaflex) according manufacturers' instructions assigned groups. Half for each group stored in water 1 week,...

The objective of this study was to determine whether the addition different types boron (Borax, Boric Acid and Colemanite) polymethyl methacrylate denture base resin would improve flexural impact strengths, surface hardness methacrylate.Borax, acid, Colemanite were added heat polymerized specimens prepared for strength (65x10x2.5 mm), (50x6x4 (20x6x4 mm) tests according manufacturers' instructions (n=10). To specimens, they loaded until failure on a universal testing machine using three...

Studies comparing tensile bond strength of various soft and hard denture liner materials to conventionally additively manufactured base resins are lacking. The purpose this study was investigate the between chair- laboratory-side relining denture-base produced by additive manufacturing conventional methods.A total 120 dimethacrylate-based polymethylmethacrylate (PMMA)-based fabricated dumbbell-shaped were produced. Heat-cured reline material, self-cured chair-side material attached bases....

Abstract Purpose The purpose of this study was to evaluate the effects chemical disinfectants on color stability acrylic denture teeth (ADT) via spectrophotometric analysis. Materials and Methods A total 120 central ADT specimens were randomly assigned eight experimental groups immersed in following solutions (n = 15). Tap water/control group (CON), neutral soap (NTS), 2% sodium hypochlorite (SHC1), 5.25% (SHC2), perborate (SPB), povidone‐iodine (PVI), chlorhexidine gluconate (CHG),...

Objective: The aim of this study was to evaluate the effect different temporary crown materials (TCMs) and surface roughening methods on shear bond strength (SBS) orthodontic brackets. Background data: TCMs are widely used during treatment in teeth need prosthetic treatment, prevent damage final restoration. However, there is no consensus considering best method for TCMs. Methods: Five [Dentalon Plus-(D), Basworth Trim II-(B), Voco Structure Premium-(V), 3M ESPE Protempt 4-(P), Revotek...

Objectives: The purpose of this study was to investigate the bonding properties sandblasted with different size aluminum oxide particles denture base silicone based soft liner. Methods: Polymethyl methacrylate (PMMA) test specimens were fabricated and then randomly assigned 5 groups (n=15), according treatments applied, untreated (control, group 1), 50 µm Al2O3 (group 2), 60 3), 120 4), 250 5). resilient liner processed between 2 PMMA blocks. Bonding strength liners compared by tensile use...

Objective: The purpose of this study was to investigate the influence post surface conditioning methods on roughness and microtensile bond strength (μTBS) zirconia posts a resin cement. Background data: Debonding at post-adhesive interface is major problem for posts. Methods: A total 25 (n=5) were prepared as follows: untreated (control, group C), airborne-particle abraded (group AA), silica coated SC), Nd:YAG laser irradiated N), Er:YAG E). Prior application dual-cured cement posts, values...