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The European Journal of Prosthodontics... Nov 2022The objective of this systematic review was to compare the longevity of direct amalgam and composite resin restorations, in posterior teeth, through clinical,...
OBJECTIVES
The objective of this systematic review was to compare the longevity of direct amalgam and composite resin restorations, in posterior teeth, through clinical, prospective or retrospective studies, with at least 5 years of follow-up.
MATERIALS AND METHODS
Studies published in the last 15 years (from 2006 to 2021) were collected using the PubMed and Medline databases.
RESULTS
The search strategy associated with the established inclusion and exclusion criteria resulted in a total of 17 articles. Factors related to failures in the performance of restorations were analyzed together with the clinical performance results of each material over the years of study, according to the methodology of each article.
CONCLUSIONS
Regardless of the restorative material, the successful results over more than 5 years are due much more to the correct application of the technique, the operator's skill/knowledge and factors related to the patient, such as the type of tooth, number of faces involved in the restoration and oral hygiene.
Topics: Humans; Prospective Studies; Retrospective Studies; Composite Resins; Dental Materials
PubMed: 35438266
DOI: 10.1922/EJPRD_2371Maciel09 -
Dental Clinics of North America Jan 2021In the past, the only way to replace missing teeth was to have a removable appliance. However, these days, dental implants are commonly being used to replace missing... (Review)
Review
In the past, the only way to replace missing teeth was to have a removable appliance. However, these days, dental implants are commonly being used to replace missing teeth. The dental implants are improving as a result of new technological and scientific advances. Different materials have been used in the past for dental implants such as lead, stainless steel, and gold. Currently, the focus is on using Roxolid, surface-modified titanium implants, and zirconia. These materials have superior esthetic and functional characteristics for dental implants.
Topics: Dental Implants; Dental Materials; Esthetics, Dental; Humans; Materials Science; Titanium; Zirconium
PubMed: 33213717
DOI: 10.1016/j.cden.2020.09.006 -
Comparison of Mechanical Properties of 3D-Printed, CAD/CAM, and Conventional Denture Base Materials.Journal of Prosthodontics : Official... Jul 2020To evaluate and compare the mechanical properties (flexural strength and surface hardness) of different materials and technologies for denture base fabrication. The...
PURPOSE
To evaluate and compare the mechanical properties (flexural strength and surface hardness) of different materials and technologies for denture base fabrication. The study emphasized the digital technologies of computer-aided design/computer-aided manufacturing (CAD/CAM) and three-dimensional (3D) printing.
MATERIALS AND METHODS
A total of 160 rectangular specimens were fabricated from three conventional heat-polymerized (ProBase Hot, Paladon 65, and Interacryl Hot), three CAD/CAM produced (IvoBase CAD, Interdent CC disc PMMA, and Polident CAD/CAM disc), one 3D-printed (NextDent Base), and one polyamide material (Vertex ThermoSens) for denture base fabrication. The flexural strength test was the three-point flexure test, while hardness testing was conducted using the Brinell method. The data were analyzed using descriptive and analytical statistics (α = 0.05).
RESULTS
During flexural testing, the IvoBase CAD and Vertex ThermoSens specimens did not fracture during loading. The flexural strength values of the other groups ranged from 71.7 ± 7.4 MPa to 111.9 ± 4.3 MPa. The surface hardness values ranged from 67.13 ± 10.64 MPa to 145.66 ± 2.22 MPa. There were significant differences between the tested materials for both flexural strength and surface hardness. There were also differences between some materials with the same polymerization type. CAD/CAM and polyamide materials had the highest flexural strength values. Two groups of CAD/CAM materials had the highest surface hardness values, while a third, along with the polyamide material, had the lowest. The 3D-printed materials had the lowest flexural strength values.
CONCLUSIONS
Generally, CAD/CAM materials show better mechanical properties than heat-polymerized and 3D-printed acrylics do. Nevertheless, a material's polymerization type is no guarantee of its optimal mechanical properties.
Topics: Computer-Aided Design; Dental Implants; Dental Materials; Denture Bases; Materials Testing; Printing, Three-Dimensional; Stress, Mechanical; Surface Properties
PubMed: 32270904
DOI: 10.1111/jopr.13175 -
The British Journal of Dermatology May 2024
Topics: Humans; Dermatitis, Allergic Contact; Female; Male; Adult; Middle Aged; Dental Materials; Patch Tests; Aged
PubMed: 38758061
DOI: 10.1093/bjd/ljae160 -
Journal of Dental Research Oct 2023Despite its reputation as the most widely used restorative dental material currently, resin-based materials have acknowledged shortcomings. As most systematic survival... (Review)
Review
Despite its reputation as the most widely used restorative dental material currently, resin-based materials have acknowledged shortcomings. As most systematic survival studies of resin composites and dental adhesives indicate, secondary caries is the foremost reason for resin-based restoration failure and life span reduction. In subjects with high caries risk, the microbial community dominated by acidogenic and acid-tolerant bacteria triggers acid-induced deterioration of the bonding interface and/or bulk material and mineral loss around the restorations. In addition, resin-based materials undergo biodegradation in the oral cavity. As a result, the past decades have seen exponential growth in developing restorative dental materials for antimicrobial applications addressing secondary caries prevention and progression. Currently, the main challenge of bioactive resin development is the identification of efficient and safe anticaries agents that are detrimental free to final material properties and show satisfactory long-term performance and favorable clinical translation. This review centers on the continuous efforts to formulate novel bioactive resins employing 1 or multiple agents to enhance the antibiofilm efficacy or achieve multiple functionalities, such as remineralization and antimicrobial activity antidegradation. We present a comprehensive synthesis of the constraints and challenges encountered in the formulation process, the clinical performance-related prerequisites, the materials' intended applicability, and the current advancements in clinical implementation. Moreover, we identify crucial vulnerabilities that arise during the development of dental materials, including particle aggregation, alterations in color, susceptibility to hydrolysis, and loss of physicomechanical core properties of the targeted materials.
Topics: Humans; Dental Restoration, Permanent; Dental Materials; Composite Resins; Dental Caries; Dentistry; Anti-Infective Agents
PubMed: 37555431
DOI: 10.1177/00220345231182357 -
British Dental Journal May 2022With the phasing down of dental amalgam use in response to the Minamata Convention, it is likely that resin-based composite restoratives will be the dental material of... (Review)
Review
With the phasing down of dental amalgam use in response to the Minamata Convention, it is likely that resin-based composite restoratives will be the dental material of choice for the direct restoration of compromised dentition in the UK, at least for the foreseeable future. The current materials have a finite lifespan, with failures predominately due to either secondary caries or fracture. Consequently, there is considerable in vitro research reported each year with the intention of producing improved materials. This review describes the recent research in materials designed to have low polymerisation shrinkage and increased mechanical properties. Also described is research into materials that are either antimicrobial or are designed to release ions into the surrounding oral environment, with the aim of stimulating remineralisation of the surrounding dental tissues. It is hoped that by describing this recent research, clinicians will be able to gain some understanding of the current research that will potentially lead to new products that they can use to improve patient treatment in the future.
Topics: Composite Resins; Dental Amalgam; Dental Caries; Dental Materials; Dental Restoration, Permanent; Humans
PubMed: 35562465
DOI: 10.1038/s41415-022-4240-8 -
British Dental Journal May 2022Dental materials can cause reactions to the oral mucosa and present to the general dental practitioner. These are often referred to as 'allergies' but are frequently...
Dental materials can cause reactions to the oral mucosa and present to the general dental practitioner. These are often referred to as 'allergies' but are frequently lichenoid reactions. Most of these are related to dental amalgam restorations and can be remedied by replacing the restoration with another suitable material. Other metals, including gold, palladium, nickel and chrome, have also been reported to trigger mucosal changes. Less commonly, issues arise from other restorative materials, including denture acrylics, composites and glass polyalkenoates. Reactions are also reported due to endodontic and sealing materials. It is unclear what role skin 'patch' testing has in managing dental material allergies. This article aims to give the practitioner a clearer picture of dental material allergy issues and how they should be approached in primary dental practice.
Topics: Dental Amalgam; Dental Materials; Dental Restoration, Permanent; Dentists; Humans; Hypersensitivity; Patch Tests; Professional Role
PubMed: 35562454
DOI: 10.1038/s41415-022-4195-9 -
Journal of Esthetic and Restorative... Jan 2023The background and clinical understanding of the properties of currently available indirect restorative systems and fabrication methods is, along with manufacturer and... (Review)
Review
OBJECTIVE
The background and clinical understanding of the properties of currently available indirect restorative systems and fabrication methods is, along with manufacturer and evidence-based literature, an important starting point to guide the clinical selection of materials for tooth and/or implant supported reconstructions. Therefore, this review explores most indirect restorative systems available in the market, especially all-ceramic, along with aspects of manufacturing process, clinical survival rates, and esthetic outcomes.
OVERVIEW
Progressive incorporation of new technologies in the dental field and advancements in materials science have enabled the development/improvement of indirect restorative systems and treatment concepts in oral rehabilitation, resulting in reliable and predictable workflows and successful esthetic and functional outcomes. Indirect restorative systems have evolved from metal ceramics and polymers to glass ceramics, polycrystalline ceramics, and resin-matrix ceramics, aiming to improve not only biological and mechanical properties, but especially the optical properties and esthetic quality of the reconstructions, in attempt to mimic natural teeth.
CONCLUSIONS
Based on several clinical research, materials, and patient-related parameters, a decision tree for the selection of indirect restorative materials was suggested to guide clinicians in the rehabilitation process.
CLINICAL SIGNIFICANCE
The pace of materials development is faster than that of clinical research aimed to support their use. Since no single material provides an ideal solution to every case, professionals must continuously seek information from well designed, long-term clinical trials in order to incorporate or not new materials and technological advancements.
Topics: Humans; Dental Prosthesis Design; Ceramics; Dental Materials; Dental Porcelain
PubMed: 36688803
DOI: 10.1111/jerd.13016 -
The Journal of Prosthetic Dentistry May 2022More translucent dental zirconias have been developed by incorporating the cubic phase and reducing the tetragonal phase content that undergoes transformation...
STATEMENT OF PROBLEM
More translucent dental zirconias have been developed by incorporating the cubic phase and reducing the tetragonal phase content that undergoes transformation toughening, leading to reduced mechanical properties. Whether the clinically relevant mechanical property of the edge chipping toughness of the material is also reduced is unclear.
PURPOSE
The purpose of this in vitro study was to evaluate the edge chipping toughness and translucency of translucent zirconia, 3mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP), and lithium disilicate.
MATERIAL AND METHODS
Two translucent zirconia products, Katana and Lava Esthetic; one 3Y-TZP, Lava Plus; and one lithium disilicate, IPS e.max Press were prepared and tested for phase composition via X-ray diffraction (XRD) (n=3), translucency via a spectrophotometer (n=20), and edge chipping via a universal testing machine with a custom-machined specimen holder and diamond indenter (n=20). The 3Y-TZP and lithium disilicate served as the optimal control materials for edge chipping and translucency, respectively. Translucency was compared with 1-way ANOVA and edge toughness with ANCOVA (α=.05).
RESULTS
The XRD showed the 3Y-TZP to be almost completely tetragonal phase compared with the 2 translucent zirconia products that were predominantly cubic. Katana UTML and IPS e.max Press had a statistically similar (P>.05) translucency that was significantly (P<.05) greater than that of Lava Esthetic and Lava Plus. The edge toughness of Katana UTML was 304 N/mm, IPS e.max Press was 354 N/mm, Lava Esthetic was 394 N/mm, and Lava Plus was 717 N/mm, with significance rankings of Katana UTM
CONCLUSIONS
Some translucent zirconias had translucency similar to that of lithium disilicate; however, as translucency increased with increased cubic content, edge toughness decreased.
Topics: Ceramics; Dental Materials; Esthetics, Dental; Materials Testing; Surface Properties; Zirconium
PubMed: 33581865
DOI: 10.1016/j.prosdent.2020.12.009 -
Compendium of Continuing Education in... Oct 2021Today's adhesive dentistry facilitates tooth structure preservation and the use of highly esthetic materials, meeting the ever-increasing demand for minimally invasive...
Today's adhesive dentistry facilitates tooth structure preservation and the use of highly esthetic materials, meeting the ever-increasing demand for minimally invasive treatment. With proper protocols, adhesive resin bonding not only attaches direct and indirect materials, such as composite resins, ceramics, and others, to tooth structures but also reinforces the tooth and restorative material. Strong evidence shows that long-term clinical success rates of adhesive dentistry are well within the range of conventional non-adhesive, retention-based protocols. For optimal bond strengths and long-lasting clinical success, each material and tooth substrate requires specific pretreatments, bonding agents, and protocols, as this article will discuss.
Topics: Ceramics; Composite Resins; Dental Bonding; Dental Cements; Dental Materials; Esthetics, Dental; Materials Testing; Resin Cements
PubMed: 34555916
DOI: No ID Found