Does surface priming increase the bond strength of orthodontic brackets? An experimental study.

Objective: To evaluate the effects of metal primer II (MP II) on the shear bond strength (SBS) of orthodontic brackets bonded to teeth and bis-acryl composite provisional material (Bis-Acryl).

Material And Methods: Twenty extracted human premolars specimens and 20 premolar shaped Bis-Acryl specimens were obtained and randomly divided into two surface groups. The first group consisted of human premolars (T) bonded to brackets in the conventional way while in the second (T-MP) MP II was applied on the bracket base before bonding.

Efficacy of Denture Cleansers on Microbial Adherence and Surface Topography of Conventional and CAD/CAM-Processed Denture Base Resins.

This study assessed the efficacy of five denture cleansers on the microbial adherence and surface topography of conventional and CAD/CAM denture base resins. Acrylic resin discs were fabricated using conventional, milling, and 3D printing methods (N = 180). The discs were contaminated with dual species of and biofilm for 72 h and then disinfected with either of the denture cleansers (Fittydent cleansing tablets, 2% Chlorhexidine gluconate, 0.

Effects of background color and thickness on the optical properties of CAD-CAM resin-matrix ceramics.

Statement Of Problem: Information regarding the masking ability of computer-aided design and computer-aided manufacture (CAD-CAM) resin-matrix ceramic materials with different compositions is scarce.

Purpose: The purpose of this in vitro study was to evaluate the effects of background color and thickness on the optical properties (color and translucency) of CAD-CAM resin-matrix ceramics.

Material And Methods: Twelve rectangular specimens were fabricated at a different thickness (1, 1.

Soft Denture Liner Adhesion to Conventional and CAD/CAM Processed Poly(Methyl Methacrylate) Acrylic Denture Resins-An In-Vitro Study.

This study aimed to evaluate the airborne-particle abrasion surface treatment effects on the tensile bond strength (TBS) between resilient denture liner and CAD/CAM or conventional heat polymerized poly (methyl methacrylate) (PMMA) acrylic denture resins. A total of 48 dumbbell-shaped specimens (70 mm in total length, and 12 mm and 7 mm in diameter at the thickest and thinnest section, respectively) were prepared from CAD/CAM and conventional acrylic resins. Before relining with denture liner, 12 specimens from each material were surface-treated by 110 µm AlO airborne-particle abrasion, and the remaining specimens served as control (no treatment).

Effect of aging and mechanical brushing on surface roughness of 3D printed denture resins: A profilometer and scanning electron microscopy analysis.

Background: The use of 3D printed material in the dental field is gaining tremendous attention. However, studies related to 3D printed denture resins are scarce and need consideration before their inclusion in routine clinical practice.

Objective: This study aimed to assess the surface roughness (Ra) of 3D printed denture resins following aging and mechanical brushing.

Color stability of 3D-printed denture resins: effect of aging, mechanical brushing and immersion in staining medium.

Purpose: This study evaluated and compared the color stability of 3D-printed and conventional heat-polymerized acrylic resins following aging, mechanical brushing, and immersion in staining medium.

Materials And Methods: Forty disc-shaped specimens (10 mm in diameter and 3 mm thick) were prepared from two 3D-printed [DentaBASE (DB) and Denture 3D+ (D3D)] and one conventional polymethylmethacrylate (PMMA) denture materials. The specimens were thermo-cycled, subjected to mechanical brushing, and were immersed in either coffee, lemon juice, coke, or artificial saliva (AS) to simulate one and two years of oral use.

Role of antimicrobial photodynamic therapy in reducing whole salivary oral yeasts colonization in type-2 diabetic and non-diabetic patients with and without dental implants.

Objective: The aim was to assess the impact of antimicrobial photodynamic therapy (aPDT) in reducing whole salivary oral yeasts colonization in type-2 diabetic and non-diabetic patients with dental implants.

Methods: Type-2 diabetic and self-reported non-diabetic patients were included. Participants were divided into the following groups: Group-1: Type-2 diabetic patients with dental implants; Group-2: Non-diabetic patients with dental implants; Group-3: Type-2 diabetic patients without dental prostheses; Group-4: Non-diabetic patients without dental prostheses.

Antimicrobial capacity of photodynamic therapy on oral health-related quality of life and halitosis among elderly patients wearing removal dentures.

Purpose: The aim of the present clinical trial was to evaluate the efficacy of antimicrobial photodynamic therapy (PDT) for the treatment of halitosis in elderly patients wearing dentures.

Methods: Elderly patients (>60 years age) wearing complete dentures and diagnosed with halitosis (HS levels >112 ppb) were divided into two groups: patients undergoing treatment with tongue scraper and full mouth disinfection (Group I) and patients undergoing treatment with tongue scraper, full mouth disinfection and single application of PDT (Group II). Oral health related quality of life (OHRQoL) was assessed using a 14-point Likert scale used in oral health impact profile (OHIP).

Failure analysis of eleven Gates Glidden drills that fractured intraorally during post space preparation. A retrieval analysis study.

The purpose of this study was to determine the failure mechanism of clinically failed Gates Glidden (GG) drills. Eleven retrieved GG drills (sizes #1 to #3) which fractured during root canal preparation were collected and the fracture location was recorded based on macroscopic observation. All fracture surfaces were investigated by a SEM.

Knowledge and attitudes of dental interns toward denture adhesives in King Saud University, Riyadh, Saudi Arabia.

Objective: The objective of this study was to evaluate the knowledge and attitudes of dental interns at King Saud University College of Dentistry (KSUCD) regarding denture adhesives (DAs).

Materials And Methods: Surveys were distributed to dental interns at KSUCD ( = 100). Cross-tabulations with the Pearson-™s Chi-square test were used to compare variables using the Statistical Package for Social Sciences ( ≤ 0.

A global probe into dental student perceptions about philanthropy, global dentistry and international student exchanges.

Background: Training culturally competent graduates who can practice effectively in a multicultural environment is a goal of contemporary dental education. The Global Oral Health Initiative is a network of dental schools seeking to promote global dentistry as a component of cultural competency training.

Objective: Before initiating international student exchanges, a survey was conducted to assess students' awareness of global dentistry and interest in cross-national clerkships.

The effect of simulating porcelain firing on the elemental composition, microstructure, and mechanical properties of electroformed gold restorations.

Background/purpose: The mechanical properties of pure gold (Au) are modified by thermal treatments. Thus, the aim of this study was to evaluate the effect of porcelain firing on the elemental composition, microstructure, and mechanical properties of electroformed Au crowns.

Materials And Methods: Twenty electroformed Au specimens were prepared and divided into two groups.

The Effect of Artificial Aging on The Bond Strength of Heat-activated Acrylic Resin to Surface-treated Nickel-chromium-beryllium Alloy.

Purpose: The debonding load of heat-activated polymethylmethacrylate (PMMA) denture base resin material to a nickel-chromium-beryllium (Ni-Cr-Be) alloy conditioned by three different surface treatments and utilizing two different commercial bonding systems was investigated.

Materials And Methods: Denture resin (Lucitone-199) was bonded to Ni-Cr-Be alloy specimens treated with Metal Primer II, the Rocatec system with opaquer and the Rocatec system without opaquer. Denture base resin specimens bonded to non-treated sandblasted Ni-Cr-Be alloy were used as controls.

Perceptions of Saudi dental students on cultural competency.

Objectives: To probe dental students' perceptions on their cultural competency and international student exchange programs as a way of improving cultural competency training.

Methods: A cross-sectional survey (n=460) was distributed to predoctoral students at the College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia in May 2014 at the male and female university campuses. Descriptive statistics were carried out using Statistical Package for Social Sciences (p=0.

Metallurgical characterization of experimental Ag-based soldering alloys.

Aim: To characterize microstructure, hardness and thermal properties of experimental Ag-based soldering alloys for dental applications.

Materials And Methods: Ag12Ga (AgGa) and Ag10Ga5Sn (AgGaSn) were fabricated by induction melting. Six samples were prepared for each alloy and microstructure, hardness and their melting range were determined by, scanning electron microscopy, energy dispersive X-ray (EDX) microanalysis, X-ray diffraction (XRD), Vickers hardness testing and differential scanning calorimetry (DSC).

Effects of surface treatment and artificial aging on the shear bond strength of orthodontic brackets bonded to four different provisional restorations.

Objective: To evaluate the combined effects of material type, surface treatment, and thermocycling on the bond strength of orthodontic brackets to materials used for the fabrication of provisional crowns.

Materials And Methods: Four materials were included in this study (ProTemp, Trim Plus, Trim II, and Superpont C+B). Sixty cylindrical specimens (1 × 3 cm) were prepared from each material and equally divided into three groups.