Comparative Analysis of Calcium and Hydroxyl Ion Release from Pulp Dressing Materials in Pulpotomized Premolars.

BACKGROUND The aim of this study was to evaluate the time-dependent release of calcium (Ca⁺⁺) and hydroxyl (OH⁻) ions from 3 different pulp dressing materials used to cap root canal orifices in pulpotomized premolars. MATERIAL AND METHODS Freshly extracted (n=40) premolars were subjected to standardized pulpotomy procedure and finally restored in 5 groups using resin-modified glass ionmmer liner (RMGI) and bonded resin composite directly against the pulp chamber's floor (Control, G2) and over 3 different orifices' capping materials - Dycal (G3), Endo Sequence root repair material (ESRRM, G4), and mineral trioxide aggregate (MTA) Angelus (G5). Another 10 sound premolars served as the Reference group (G1).

The flexural strength of 3D-printed provisional restorations fabricated with different resins: a systematic review and meta-analysis.

Background: Three-dimensional (3D) printing technology has revolutionized dentistry, particularly in fabricating provisional restorations. This systematic review and meta-analysis aimed to thoroughly evaluate the flexural strength of provisional restorations produced using 3D printing while considering the impact of different resin materials.

Methods: A systematic search was conducted across major databases (ScienceDirect, PubMed, Web of Sciences, Google Scholar, and Scopus) to identify relevant studies published to date.

Role of Robotics and Artificial Intelligence in Oral Health and Preventive Dentistry - Knowledge, Perception and Attitude of Dentists.

Purpose: To assess the knowledge, attitude and perception of dentists (dental students, dental school graduates/interns, postgraduate dentists) of the role of robotics (R) and artificial intelligence (AI) in oral health and preventive dentistry. The null hypothesis was that dentists would not be aware of R and AI use in dentistry and would not be ready to accept them in oral health and preventive dentistry for dental care management and training.

Materials And Methods: This was an observational cross-sectional study in which data was collected from a representative population in Saudi Arabia.

The accuracy of gypsum casts obtained from the disinfected extended-pour alginate impressions through prolonged storage times.

Background: Manufacturers of the extended-pour alginates claimed their dimensional stability through prolonged storage. No data confirmed the ability of these materials to maintain their dimensions and the reproduced oral details following their chemical disinfection. Therefore, this study evaluated the dimensional stability and surface detail reproduction of gypsum casts obtained from disinfected extended-pour alginate impressions through different storage time intervals.

Influences of Successive Exposure to Bleaching and Fluoride Preparations on the Surface Hardness and Roughness of the Aged Resin Composite Restoratives.

Surfaces of composite restorations are adversely affected upon bleaching and topical fluoride application. Such a procedure is normally carried out in the presence of restorations already serving in a different oral environment, although previous in vitro studies only considered the freshly-prepared composite specimens for assessment. The current study accordingly aimed to evaluate both the surface hardness and roughness of aged composite restoratives following their successive exposure to bleaching and topical fluoride preparations.

Debonding characteristics of orthodontic brackets subjected to intraoral stresses under different adhesive regimes: An in-vitro study.

Aim: To evaluate the effect of simulated intraoral hydraulic, thermal, and mechanical stresses on the debonding characteristics of orthodontic brackets under different adhesive regimes.

Materials And Methods: Groups of pre-coated (G1) and non-coated (G2) orthodontic metal brackets were bonded onto the buccal surfaces of 96 premolars using etch-and-rinse (SG1, = 24) and self-etch (SG2, = 24) primers. Twelve specimens (C1) from each subgroup were subjected to early debonding resistance tests, while the other twelve (C2) were used to test delayed debonding resistance after exposure to conditions simulating intraoral hydraulic, thermal, and mechanical stresses.

Microleakage of Aesthetic Restorations Following Functional Simulation and Immersion in Saudi-Traditional Mouth Rinses.

Aim: The study is aimed to assess the effect of 3 Saudi-traditional types of mouth rinses (Karadah, Myrrh, salted water) on the microleakage of composite and glass-ionomer restorations subjected to thermal cycling and cyclic loading.

Material And Methods: Class V cavities in both buccal and lingual surfaces of eighty extracted premolars were restored with both nano-filled composite and glass-ionomer restoratives. Half the number of restored teeth (group 1, n = 40) were subjected to further thermal cycling and cyclic loading to mimic the in-service functional stresses.

Fracture Resistance of Ceramic Crowns Supported with Indirect Chair-side Composite Cores.

Aims And Objectives: To evaluate the influence of indirect chair-side polymerization of resin composite cores on the fracture resistance of overlaying IPS e.max Press crowns.

Materials And Methods: Root canals of 60 extracted premolars were prepared to receive #2 fiber posts after the crowns were sectioned 2 mm above the cervical line.

Fracture Resistance of Tilted Premolars Restored with Different Post-Core Systems.

Aims And Objective: To assess the effect of root tilt on the fracture resistance and failure pattern of endodontically-treated premolars restored with different post-core systems.

Materials And Methods: Ninety endodontically-treated premolars were mounted in acrylic blocks with 0°, 12°, and 24° axial root tilt. Teeth in each group were restored in three subgroups with cast post-core, readymade metal posts and composite cores, and fiber post and composite cores.

Bonding values of two contemporary ceramic inlay materials to dentin following simulated aging.

Purpose: To compare the push-out bond strength of feldspar and zirconia-based ceramic inlays bonded to dentin with different resin cements following simulated aging.

Materials And Methods: Occlusal cavities in 80 extracted molars were restored in 2 groups (n=40) with CAD/CAM feldspar (Vitablocs Trilux forte) (FP) and zirconia-based (Ceramill Zi) (ZR) ceramic inlays. The fabricated inlays were luted in 2 subgroups (n=20) with either etch-and-bond (RelyX Ultimate Clicker) (EB) or self-adhesive (RelyX Unicem Aplicap) (SA) resin cement.

Retention of fiber posts to the optimally and over-prepared dowel spaces.

Purpose: To assess the retention of glass fiber post cemented with self-adhesive resin cement into optimum and over-prepared root canals following obturation in the presence of either eugenol (EB) or calcium hydroxide (CB)-based sealers.

Materials And Methods: Roots of extracted premolars were endodontically-treated in 5 groups (n = 10). Roots of Group 1 (control) were left with no obturation and then optimally prepared to receive endodontic dowels.

Bonding quality of contemporary dental cements to sandblasted esthetic crown copings.

Aim: To evaluate the shear bond strength of current luting cements to sandblasted crown-coping substrates.

Methods: Specimens of nickel-chromium, pressable glass ceramic, and zirconia crown-coping substrates were sandblasted in three groups (n = 30 each) with 50 (group 1), 110 (group 2), and 250 μm (group 3) alumina particles at a pressure of 250 kPa. Cylinders of glass ionomer, universal resin, and self-adhesive resin cements were then built up on the sandblasted substrate surfaces of each group (n = 10).

Bonding of resin composite to tooth structure of uremic patients receiving hemodialysis: shear bond strength and acid-etch patterns.

Purpose: To investigate the influence of uremia on the shear bond strength (SBS) of composite resin to enamel and dentin substrates with assessment of the micromorphological pattern of etched enamel and dentin surfaces using atomic force microscopy (AFM).

Materials And Methods: A total of 44 natural molars was collected from healthy individuals (n=22 molars) and uremic patients (n=22 molars). Each set of teeth was then divided into 2 equal subsets (n=11 molars) relative to the bonding substrate to be tested.

Differentiation of tuberculous meningitis from acute bacterial meningitis using simple clinical and laboratory parameters.

Tuberculous meningitis (TBM) is still a major cause of serious illness in many parts of the world. The newer diagnostic tests and neuroimaging methods are unlikely to be available in many developing countries. We attempt to identify simple parameters for early diagnosis.

Fracture load of composite resin and feldspathic all-ceramic CAD/CAM crowns.

Statement Of Problem: Various machinable materials are currently used with computer-aided design/computer-assisted manufacturing (CAD/CAM) technologies for the chairside fabrication of restorations. However, properties of these new machinable materials, such as fracture load, wear, marginal deterioration, and color stability, should be investigated in vitro under replicated clinical conditions prior to time-consuming clinical studies.

Purpose: This study investigated the effect of cyclic loading fatigue and different luting agents under wet conditions on the fracture load of CAD/CAM machined composite resin and all-ceramic crowns.

Bonding of single-component adhesives to dentin following chemomechanical caries removal.

Purpose: To determine the effect of chemomechanical caries removal on the bonding quality of contemporary single-component adhesives to dentin.

Materials And Methods: N-monochloro-DL-2-aminobutyrate solution (NMAB) and Carisolv gel were used to chemomechanically remove dentin caries in 60 extracted human molars. Caries removal with rotating instruments served as the control.

The wetting of surface-treated silicone impression materials by gypsum mixes containing disinfectants and modifiers.

Purpose: This work evaluated wettability of silicone impression surfaces by gypsum mixes containing disinfectants.

Materials And Methods: Two types of dental stone were modified by mixing with aqueous solutions of either sodium hypochlorite or povidone iodine. These materials were subjected to further modification by adding a mixture of 1% gum arabic and 0.

Reproducibility of sterilized rubber impressions.

Impressions, dentures and other dental appliances may be contaminated with oral micro-flora or other organisms of varying pathogenicity from patient's saliva and blood. Several approaches have been tried to control the transmission of infectious organisms via dental impressions and because disinfection is less effective and has several drawbacks for impression characterization, several sterilization methods have been suggested. This study evaluated the reproducibility of rubber impressions after sterilization by different methods.

Calcium hypochlorite as a disinfecting additive for dental stone.

Statement Of Problem: Dental casts come into direct contact with impression materials and other items that are contaminated by saliva and blood from a patient's mouth, leaving the casts susceptible to cross-contamination. Topical methods of disinfecting casts are difficult to control, while immersion methods are potentially destructive. Thus, an additional method to control cross-contamination between patients and laboratory personnel is needed.

The effect of disinfectants on the properties of dental gypsum, part 2: surface properties.

Purpose: This study is part of an ongoing investigation to evaluate the surface properties of dental stones mixed with disinfection solutions, and to determine the effect of adding gum arabic and calcium hydroxide on the same properties.

Materials And Methods: Aqueous solutions of 2 chemical disinfectants were used in mixing 2 types of dental stones (type III and type V). These dental stones were modified further by adding 1% gum arabic and 0.

The effect of disinfectants on the properties of dental gypsum: 1. Mechanical properties.

Purpose: This study was conducted to evaluate the effect of selected disinfectants incorporated in the liquid of dental stones on material strength properties with the aim of developing a material with acceptable mechanical properties.

Materials And Methods: Two types of dental stone (types III and V) were mixed with aqueous solutions of 0.525% sodium hypochlorite, 0.