Influence of microstructure on optical properties of CAD-CAM lithium disilicate glass-ceramics.

Objectives: To evaluate the influence of microstructure and chemical composition on the optical properties of CAD-CAM lithium disilicate glass-ceramics.

Methods: Samples (n = 5; 1.0 mm thickness) of shades A1, A2, and A3 were fabricated from CAD-CAM ceramic blocks (Ivoclar Vivadent): IPS e.

Fatigue methods for evaluating translucent dental zirconia.

Objective: To investigate fatigue methods for the evaluation of translucent zirconia and to associate in vitro failures with clinically reported ones.

Data: Studies published in English that used fatigue tests on dental translucent zirconia.

Sources: Two databases (MEDLINE/PubMed and Scopus) were electronically searched without any restriction on year of publication.

Longevity of different abutments placed on narrow diameter implants: Assessment of structural damage and loosening.

Objectives: To evaluate structural damage and loosening of abutments placed on narrow diameter implants after cyclic fatigue.

Methods: Sixty Morse taper narrow diameter implants (Neodent, Brazil) received two types of abutments (1PA- one-piece abutment or 2PA- two-piece abutment), which were randomly divided into 3 fatigue experiments (n = 10). The implants were placed into a customized supporting holder and a software-assisted digital torque wrench secured the manufacturer recommended torque for each abutment.

The influence of filler load in 3D printing resin-based composites.

Objective: To evaluate the influence of the barium glass (BG) filler in 3D printing resin-based composites for restorative structures.

Methods: Experimental 3D printing resin-based composites were formulated with UDMA 70%wt, Bis-EMA 20%wt, and TEGDMA 10%wt. Photoinitiators TPO and DFI (2%wt) were used.

Brazilian primary dental care in a universal health system: Challenges for training and practice.

Objectives: To report the challenges for training and practice for the Brazilian primary dental care in a universal health system.

Methods: Health, education and protection rights against poverty are guaranteed by the 1988 Brazilian Constitution and public health in Brazil is provided by the Unified Health System (SUS), one of the largest public health systems in the world. According to SUS, every Brazilian citizen has the right to free primary oral health care as secondary and tertiary care, offering a unique opportunity to integrate oral care within general health care.

Biomechanical Behavior of a 3D-Printed Denture Base Material.

Purpose: To evaluate relevant material properties (flexural strength [σf], elastic modulus [E], water sorption [Wsp] and solubility [Wsl], and biocompatibility) of an additive manufacturing (AM) polymer vs a heat-curing acrylic resin (AR; control) for the manufacture of complete dentures, testing the hypothesis that fabrications from both materials would present acceptable material properties for clinical use.

Materials And Methods: The σf, E, Wsp, and Wsl were evaluated according to the ISO 20795-1:2013 standard, and the biocompatibility was evaluated using MTT and SRB assays. Disk-shaped specimens were fabricated and used for Wsp (n = 5), Wsl (n = 5), and biocompatibility (n = 3) testing.

Influence of printing orientation on mechanical properties of aged 3D-printed restorative resins.

Objective: To evaluate the influence of printing orientation on flexural strength (σf) and elastic modulus (E) of different 3D printing dental restorative resins.

Methods: Bar-shaped specimens (n = 20) were fabricated from two SLA-printed resins (FT- Formlabs Temporary, and FP- Formlabs Permanent) and two DLP-printed resins (DFT- Detax Freeprint Temp, and GCT- GC Temporary) using two building orientations (0º and 90º). The 3D-printed structures were aged (14 d) before submitted to three-point bending in 37ºC distilled water at a crosshead speed of 1.

Structural and torque changes in implant components of different diameters subjected to mechanical fatigue.

Objectives: To evaluate torque maintenance and structural damage in implant components of different diameters subjected to a fatigue challenge.

Methods: Thirty 10-mm-long, morse taper connection, titanium dental implants and their corresponding one-piece abutments were divided into three groups (n = 10) according to implant diameter: 4.3 mm (I4.

Chroma-dependence of CIEDE2000 acceptability thresholds for dentistry.

Objectives: Determine visual 50:50% color difference acceptability thresholds (AT) for regions of the dental color space with varying chromaticity.

Methods: A 40-observer panel belonging to two different groups (dentists and laypersons) evaluated 144 dental resin composites pairs (divided in three different sets of 48 pairs according to chroma value: Low Chroma (LC), Medium Chroma (MC) and High Chroma (HC) placed 40 cm away and inside of a viewing cabinet (D65 Standard light source; diffuse/0° geometry). A Takagi-Sugeno-Kang (TSK) fuzzy approximation was used for fitting the data points and calculate the 50:50% acceptability thresholds in CIEDE2000.

Peri-implant Outcomes from Customized Healing Abutments Using Immediate Implants: A Systematic Review.

Purpose: To evaluate the peri-implant outcomes of customized healing abutments (CstHA) placed on dental implants inserted in fresh tooth extraction sockets.

Materials And Methods: The study was registered on PROSPERO: CRD42022304320. A systematic search in PubMed, Scopus, and Web of Science was conducted between April 2022 and October 2022 to identify clinical studies involving immediate implant surgery associated with CstHA placement.

Effect of Aging on Fracture Load and Reliability of Cemented Glass-Ceramics.

Purpose: To evaluate the influence of aging on the fracture load (Lf) and reliability of glass-ceramics after different etching protocols.

Materials And Methods: Specimens were fabricated and divided according to the etching Ame (10% hydrofluoric acid [HF] for 20 seconds, 40 seconds, and 60 seconds). Etched surfaces were examined under microscopy.

Optical behavior of 3D-printed dental restorative resins: Influence of thickness and printing angle.

Objectives: To evaluate the influence of thickness and printing angle on the optical properties of 3D-printed dental restorative resins.

Methods: Four 3D printing resin systems were evaluated: DFT-Detax Freeprint Temp; FP- Formlabs Permanent Crown; FP- Formlabs Temporary CB; and GCT- GC Temporary-. Samples from each material were printed at 0° and 90°, and polished up to 0.

Biomechanical performance of endocrown and core-crown restorations: A systematic review.

Objective: To assess and compare, through a systematic review of the literature, the biomechanical performance of endocrowns and traditional core-crowns (with and without intracanal post) for the rehabilitation of endodontically treated teeth with severe coronal structure damage.

Materials And Methods: A systematic search was performed in MEDLINE/PubMed, Scopus, and Web of Science databases. In-vitro studies comparing endocrowns with (post-)core-crown restorations were selected and screened by two independent reviewers.

Genotoxicity in the oral cells of older people from a Brazilian rural area: a population-based study.

The purpose of this population-based, observational, and cross-sectional study was to evaluate alterations in the oral cells of a population of older people from a Brazilian rural area, using the micronucleus technique to investigate possible associated genotoxic factors. A questionnaire was applied and clinical examination and collection of oral mucosal cells were performed for all older people (≥ 60 years) from a town in southern Brazil. Demographic and socioeconomic variables, deleterious habits (drinking and tobacco use), presence of gastro-oesophageal reflux disease (GERD), and the use of proton pump inhibitors (PPIs) were considered the exposure variables, whereas metanuclear changes (MCs) and the prevalence of cell micronuclei (MN) were considered outcomes.

Three-dimensional (3D) printing in dental practice: Applications, areas of interest, and level of evidence.

Objectives: The aim of this review to overview three-dimensional (3D) printing technologies available for different dental disciplines, considering the applicability of such technologies and materials development.

Materials And Methods: Source Arksey and O'Malley's five stages framework using PubMed, EMBASE, and Scopus (Elsevier) databases managed this review. Papers focusing on 3D printing in dentistry and written in English were screened.

The influence of smoking on the effectiveness of at-home bleaching: A prospective clinical study.

Objectives: To evaluate the effect of smoking on tooth whitening and color change after at-home bleaching.

Materials And Methods: This prospective clinical study evaluated two groups of participants: NS-non-smokers (n = 24) and S-smokers (n = 16). All subjects were treated with at-home bleaching using 22% carbamide peroxide (CP) for 1 h/day for 14 days.

The influence of printing angle on color and translucency of 3D printed resins for dental restorations.

Objectives: To evaluate the influence of printing orientation on color and translucency of 3D printing restorative resins.

Methods: Four 3D printing resin systems in the available shades (DFT-Detax Freeprint Temp- A1, A2,A3; FP-Formlabs Permanent Crown- A2,A3,B1,C2; FT- Formlabs Temporary CB- A2,A3,B1,C2; GCT-GC Temporary- Light, Medium) were evaluated. Three samples (10×10×1.

Association between masticatory dysfunction and gastroesophageal reflux disease: A population-based study in the elderly.

Background: Caries and periodontal disease may cause tooth losses and chewing difficulty, especially in the elderly. Ingesting poorly chewed food may delay gastric emptying and favour the development of gastroesophageal reflux disease (GERD).

Objective: This study investigated the association between masticatory dysfunction and GERD in the elderly from a rural area in southern Brazil.

Biomechanical properties of a 3D printing polymer for provisional restorations and artificial teeth.

Objectives: To characterize a resin-based polymer used for 3D printing (3D) provisional restorations and artificial teeth by evaluating relevant material's properties (flexural strength (σf), elastic modulus (E), water sorption (Wsp) and solubility (Wsl)) and biocompatibility, and comparing to a bis-acryl composite resin (BA) and a heat-cured acrylic resin (AR).

Methods: Structures were fabricated from 3D, BA and AR. Bar-shaped specimens (n = 30) were submitted to three-point flexure (in 37ºC water and constant displacement rate: 1 ± 0.

RoBDEMAT: A risk of bias tool and guideline to support reporting of pre-clinical dental materials research and assessment of systematic reviews.

Objectives: To develop a risk of bias tool for pre-clinical dental materials research studies that aims to support reporting of future investigations and improve assessment in systematic reviews.

Methods: A four-stage process following EQUATOR network recommendations was followed, which included project launch, literature review, Delphi process and the tool finalization. With the support of the European Federation of Conservative Dentistry (EFCD) and the Dental Materials Group of the International Association for Dental Research (DMG-IADR), a total of 26 expert stakeholders were included in the development and Delphi vote of the initial proposal.

Color and optical properties of 3D printing restorative polymer-based materials: A scoping review.

Objective: Color and optical properties are particularly crucial to mimic natural tooth. This scoping review aimed to present an overview of the literature published on color and optical properties of 3D printing restorative polymer-based materials. The literature search was performed in MED-LINE/Pubmed, Scopus and Web of Science.

A systematic review and meta-analysis on using preheated resin composites as luting agents for indirect restorations.

Objectives: This systematic review investigated the hypothesis that preheated resin composites (RCs) used as luting agents improve the mechanical properties, physicochemical performance, and color of indirect ceramic restorations.

Materials And Methods: Literature search was performed in three databases (Medline/PubMed, Scopus, and Web of Science) and in the grey literature (OpenGrey, ProQuest, and Catalog of Theses & Dissertations from CAPES). Eligibility criteria included only studies comparing at least one preheated RC used as a luting agent with resin cements.

Accuracy and repeatability of different intraoral instruments on shade determination compared to visual shade selection.

Objective: To evaluate the accuracy and repeatability of intraoral instruments used for shade determination compared to visual shade selection (VSS).

Materials And Methods: A total of 20 subjects and 10 observers, balanced by gender, participated in the study. Observers performed VSS of the upper right central incisor from each subject.

Applications of artificial intelligence in dentistry: A comprehensive review.

Objective: To perform a comprehensive review of the use of artificial intelligence (AI) and machine learning (ML) in dentistry, providing the community with a broad insight on the different advances that these technologies and tools have produced, paying special attention to the area of esthetic dentistry and color research.

Materials And Methods: The comprehensive review was conducted in MEDLINE/PubMed, Web of Science, and Scopus databases, for papers published in English language in the last 20 years.

Results: Out of 3871 eligible papers, 120 were included for final appraisal.