1,593 results match your criteria lithium disilicate


Optical behaviors, surface treatment, adhesion, and clinical indications of zirconia-reinforced lithium silicate (ZLS): A narrative review.

J Dent 2021 Jun 9:103722. Epub 2021 Jun 9.

Department of Neurosciences, Reproductive and Odontostomatological Sciences, Division of Prosthodontics and Digital Dentistry, University "Federico II" of Naples, Via Pansini 5, 80131 Naples, Italy. Electronic address:

Objectives: The present narrative review was focused on the optical properties, surface treatment, adhesion, and clinical indications of zirconia-reinforced lithium silicate ceramics (ZLS) for Computer-aided design / Computer-aided manufacturing (CAD/CAM) technologies.

Data/sources: A literature search was performed by 3 calibrated independent researchers on PubMed, Scopus, Embase, Google Scholar, Dynamed, and Open Grey. The criteria for inclusion were: 1) papers addressing at least one of the following variables about ZLS: optical properties, surface treatment, adhesion, and clinical indications; 2) in vitro, in silico, or in vivo studies; 3) case reports; 4) systematic reviews. Read More

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Effects of shade and thickness on the translucency parameter of anatomic-contour zirconia, transmitted light intensity, and degree of conversion of the resin cement.

J Prosthet Dent 2021 Jun 8. Epub 2021 Jun 8.

Professor, Department of Biomedical Sciences and Comprehensive Care, Indiana University School of Dentistry, Indianapolis, Ind. Electronic address:

Statement Of Problem: Anatomic-contour zirconia prostheses are usually cemented with resin cement. However, information regarding the effects of the zirconia shade and thicknesses on the translucency of the prosthesis, the intensity of the transmitted light beneath the prosthesis, and the subsequent degree of conversion in the resin cement is sparse.

Purpose: The purpose of this in vitro study was to investigate the translucency parameter in 3 anatomic-contour zirconia specimens of 2 shades at 5 different thicknesses and to investigate the transmitted light intensity and degree of conversion of the resin cement beneath the ceramic specimens by using a traditional zirconia and a lithium disilicate glass ceramic as controls. Read More

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[Clinical performance of chairside monolithic lithium disilicate glass-ceramic CAD-CAM crowns].

Shanghai Kou Qiang Yi Xue 2021 Apr;30(2):191-195

Stomatological Center, Peking University Shenzhen Hospital. Shenzhen 518036, Guangdong Province, China.

Purpose: To investigate the clinical performance of chairside monolithic lithium disilicate glass-ceramics computer-aided design(CAD)-computer aided manufacturing(CAM) crowns, and to analyze the influencing factors of cumulative survival rate.

Methods: Two hundred and fourteen patients who had chairside posterior lithium disilicate glass-ceramic CAD-CAM crowns in Peking University Shenzhen Hospital from March 2015 to March 2017 were enrolled. The crown preparations were milled using Cerec Omnicam system. Read More

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Fatigue failure and success rate of lithium disilicate table-tops as a function of cement thickness.

J Prosthodont Res 2021 Jun 10. Epub 2021 Jun 10.

Section of Prosthodontics, Department of Biomedical and Neuromotor Science, Alma Mater Studiorum University of Bologna.

Purpose: Under thin, partial coverage restoration the proper cement thickness to be clinically employed still remains an issue. The aim of this study was to determine the failure and success rates of simplified lithium disilicate occlusal veneers as a function of cement thickness. The null hypothesis was that cement thickness has no effect on the fatigue resistance. Read More

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Fracture resistance of maxillary premolars restored with different endocrown designs and materials after artificial ageing.

J Prosthodont Res 2021 Jun 10. Epub 2021 Jun 10.

Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel.

Purpose: To evaluate the effect of three different designs and two monolithic ceramic materials on the durability and fracture resistance of endocrowns on maxillary first premolars, in comparison to post-and-core crowns.

Methods: Fifty-six maxillary premolars were endodontically treated and shortened to a level of 2 mm from the cervical line, and randomly categorized into six endocrown groups and post-and-core crown control group (n=8); E1; endocrowns with flat occlusal table (without ferrule), E2; endocrowns with 1.5 mm circumferential ferrule, E3; endocrowns with 1. Read More

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Effect of different surface treatments on optical, colorimetric, and surface characteristics of a lithium disilicate glass-ceramic.

J Esthet Restor Dent 2021 Jun 9. Epub 2021 Jun 9.

MSciD and PhD Post-Graduate Program in Oral Science (Prosthodontic Unit), Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Brazil.

Objective: To evaluate the effect of surface treatments on optical, colorimetric, and surface characteristics of lithium disilicate glass-ceramic.

Materials And Methods: Specimens (n = 5, IPS e.max CAD) were randomly allocated to the following treatments: mirror-polished: SiC papers; as-cut: mimicking CAD-CAM milling; ground: 90-120 μm-grit diamond bur; ground polished: ground, finished (46-30 μm-grit diamond bur), polished (diamond cups, brush and diamond paste); ground glazed: ground, glazed; ground polished glazed: association of methods. Read More

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In-lab simulation of CAD/CAM milling of lithium disilicate glass-ceramic specimens: Effect on the fatigue behavior of the bonded ceramic.

J Mech Behav Biomed Mater 2021 May 21;121:104604. Epub 2021 May 21.

MSciD and PhD Graduate Programs in Oral Science - Prosthodontic Units, Faculty of Odontology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil. Electronic address:

The aim of this study was to evaluate the effect of in-lab simulation procedures performed on a lithium disilicate ceramic luted to a dentin-analogue material regarding the fatigue performance and topographic changes. Lithium disilicate ceramic (IPS e.max CAD) discs (Ø = 13. Read More

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Clinical Performance of CAD/CAM All-Ceramic Tooth-Supported Fixed Dental Prostheses: A Systematic Review and Meta-Analysis.

Materials (Basel) 2021 May 20;14(10). Epub 2021 May 20.

Medical Center-University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, Hugstetter Street 55, 79106 Freiburg, Germany.

Although CAD/CAM ceramics present a promising alternative to metal-ceramic fixed dental prostheses, little is known about their mid- and long-term clinical performance. This systematic review aims to estimate the survival and success rates and describes the underlying complication characteristics for CAD/CAM tooth-supported zirconia- and lithium disilicate-based fixed dental prostheses (FDPs). We systematically searched MEDLINE and Web of Science to find relevant prospective studies with a follow-up of at least one year. Read More

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Shear Bond Strength of Composite Cement to Lithium-Disilicate Glass-coated Zirconia Versus Alumina Air-abraded Zirconia.

J Adhes Dent 2021 Jun;23(3):267-275

Purpose: To compare the shear bond strength of composite cement to lithium-disilicate glass-ceramic coated zirconia vs to alumina air-abraded zirconia and to analyze the residual stresses on both of lithium-disilicate glass-ceramic coated zirconia vs alumina air-abraded zirconia specimens.

Materials And Methods: One hundred eighty zirconia disks (diameters 10 mm and 5 mm, 4.5 mm thick) were divided into two groups: lithium-disilicate glass-ceramic coating followed by hydrofluoric acid etching and Monobond N Primer (LiDi) or alumina air-abrasion (AA). Read More

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Wear of monolithic zirconia against different CAD-CAM and indirect restorative materials.

J Prosthet Dent 2021 May 28. Epub 2021 May 28.

Associate Professor, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Associate Professor, Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Adjunct Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University, Columbus, Ohio.

Statement Of Problem: The wear of monolithic zirconia against enamel has been widely studied, but how zirconia affects different opposing restorative materials is not clear.

Purpose: The purpose of this in vitro study was to investigate the depth of wear and volumetric loss of different restorative materials opposed by monolithic zirconia.

Material And Methods: Sixty-six Ø10×3-mm specimens (n=11) were fabricated from monolithic zirconia, zirconia reinforced ceramic, lithium disilicate ceramic, feldspathic ceramic, ORMOCER, and ceramic optimized polymer. Read More

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The influence of the resin-based cement layer on ceramic-dentin bond strength.

Eur J Oral Sci 2021 May 31:e12791. Epub 2021 May 31.

Institute of Clinical Dentistry, University of Oslo, Oslo, Norway.

The purpose of the study was to measure the cement thickness obtained when ceramic rods were luted to dentin and to analyze the relation between cement thickness and the previously published tensile bond strength of similar test specimens. In addition, the ISO standard 4049:2019 method was used to determine the film thickness of the used cements. Zirconia (n = 100) and lithium disilicate (n = 50) rods were cemented to bovine dentin using one of five different resin-based cements. Read More

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Layering of discolored substrates with high-value opaque composites for CAD-CAM monolithic ceramics.

J Prosthet Dent 2021 May 26. Epub 2021 May 26.

Professor, MSciD Post-Graduate Program in Dentistry, School of Dentistry, Meridional Faculty, IMED, Passo Fundo, Rio Grande do Sul State, Brazil. Electronic address:

Statement Of Problem: Severely discolored substrates have been shown to limit the use of computer-aided design and computer-aided manufacturing (CAD-CAM) ceramic blocks because they provide insufficient color masking.

Purpose: The purpose of the in vitro study was to evaluate the effect of a layer of high-value opaque composite resin over discolored substrates to determine its masking ability with CAD-CAM ceramics.

Material And Methods: Six ceramic groups (n=10) were tested. Read More

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Fatigue behavior of endodontically treated maxillary premolars with MOD defects under different minimally invasive restorations.

Clin Oral Investig 2021 May 24. Epub 2021 May 24.

Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China.

Objectives: To analyze the stress distribution and subsequent fracture resistance of human maxillary premolars with mesial-occlusal-distal (MOD) defects restored with different minimally invasive restorations.

Materials And Methods: Seventy non-carious human maxillary premolars were selected and divided into seven groups (n = 10). Ten teeth without further preparation served as control. Read More

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Lithium di silicate ceramic surface treated with Er,Cr:YSGG and other conditioning regimes bonded to orthodontic bracket.

Authors:
Ali Alqerban

Saudi Dent J 2021 May 4;33(4):188-193. Epub 2019 Dec 4.

Department of Preventive Dental Sciences College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia.

Aim: To assess bond integrity and modes of failure of metallic brackets to lithium disilicate ceramics (LDC) conditioned with Er,Cr:YSGG laser (ECL).

Material And Methods: Sixty LDC were arbitrarily allocated into six groups (n = 15) according to the type of ceramic surface conditioning treatment. Group 1 surface treated with silane (S) only, group 2 surface etched with hydrofluoric acid (HF)+ S, group 3 surface conditioned with HF+ ultrasonic bath (UB)+ S, group 4 sand blasting (SB) of glass ceramic surface with 50 µm AlO, group 5 surface conditioned with self-etch ceramic primer (SECP) and in group 6 surface treated with ECL + S. Read More

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The efficiency of laser application for debonding laminate restorations manufactured of current CAD-CAM materials with different thicknesses.

Niger J Clin Pract 2021 May;24(5):705-711

Department of Restorative Dentistry, Faculty of Dentistry, Ankara University, Ankara, Turkey.

Background: Using lasers for adhesive restoration removal can be practical and atraumatic.

Aims: The purpose of this study was to investigate Er: YAG laser exposure on debonding the adhesive cementation between enamel and feldspar ceramic, lithium disilicate-reinforced and resin nano ceramic composite laminate restorations.

Materials And Methods: Vita Cerec Blocs, IPS e. Read More

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Effect of material types on the fracture resistance of maxillary central incisors restored with CAD/CAM post and cores.

Int J Comput Dent 2021 Feb;24(1):41-51

Aim: To evaluate the fracture resistance and failure pattern of endodontically treated teeth with post and cores made of different CAD/CAM materials in comparison with cast post and cores.

Materials And Methods: A total of 40 maxillary central incisors were divided into four groups. Post and cores were fabricated using the following materials: fiber-reinforced composite, high-density polymer, polymer-infiltrated ceramic network, and nonprecious metal alloy as a control group. Read More

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February 2021

Patient with Poor Esthetic Anterior Tooth Position Treated with Lithium Disilicate Mesial Cantilever Single-retainer Fixed Partial Denture: A Case Report.

Bull Tokyo Dent Coll 2021 Jun 14;62(2):119-125. Epub 2021 May 14.

Department of Fixed Prosthodontics, Tokyo Dental College.

We report a case of fixed prosthetic treatment for poor esthetics due to the position of the maxillary left lateral incisor in a 43-year-old woman. Initial examination revealed no carious lesions, but the tooth axis of the maxillary right canine showed mesial inclination of approximately 15°. Orthodontic treatment was first proposed but was declined by the patient as they did not wish to undergo a prolonged period of therapy. Read More

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Fabrication of an implant-retained overdenture with ceramic crowns cemented on a polyetherketoneketone framework: A clinical report.

J Prosthet Dent 2021 May 13. Epub 2021 May 13.

Professor and Chair, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Senior Lecturer, Division of Gerodontology and Removable Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.

This clinical report describes the treatment of a complex intraoral situation by fabricating a maxillary implant-retained overdenture with a high-performance polymer (polyetherketoneketone) framework and lithium disilicate crowns and mandibular tooth- and implant-supported ceramic restorations. No complications were noted in 2 years, and the patient was satisfied with function and esthetics. Read More

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Investigating inlay designs of class II cavity with deep margin elevation using finite element method.

BMC Oral Health 2021 May 16;21(1):264. Epub 2021 May 16.

Department of Mechanical Engineering, National Cheng Kung University, Tainan, Taiwan, Republic of China.

Background: This study evaluates the mechanical performance of deep margin elevation technique for carious cavities by considering the shape designs and material selections of inlay using a computational approach combined with the design of experiments method. The goal is to understand the effects of the design parameters on the deep margin elevation technique and provide design guidelines from the biomechanics perspective.

Methods: Seven geometric design parameters for defining an inlay's shape of a premolar were specified, and the influence of cavity shape and material selection on the overall stress distribution was investigated via automated modelling. Read More

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Comparison of posterior indirect adhesive restorations (PIAR) with different preparation designs according to the adhesthetics classification. Part 1: Effects on the fracture resistance.

Int J Esthet Dent 2021 May;16(2):144-167

Aim: To investigate whether: 1) in the adhesive era, a full-crown restoration in a molar tooth is more resistant compared with an overlay-type restoration; b) a posterior indirect adhesive restoration (PIAR) is similar to a sound tooth from a mechanical point of view.

Materials And Methods: Seventy extracted molars were divided into five groups (1. Butt Joint; 2. Read More

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Resin Bonding of a Lithium-Disilicate Crown Using a Ligated Rubber Dam: A 2-Year Case Report.

Compend Contin Educ Dent 2021 Apr;42(4):188-191

Professor, Department of Restorative Sciences, Dental College of Georgia, Augusta University, Augusta, Georgia.

Enduring glass-ceramic restorations greatly depend on the quality of adhesion of the crown to enamel and dentin. Proper isolation is vital to the success of bonded ceramic restorations. The rubber dam has long been considered the primary method of preventing contamination of the operating field, a crucial requisite for adhesion. Read More

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Impact of resin composite cement on color of computer-aided design/computer-aided manufacturing ceramics.

J Esthet Restor Dent 2021 May 5. Epub 2021 May 5.

Department of Prosthetic Dentistry, LMU Munich, Munich, Germany.

Objective: To analyze the impact of the color of a resin composite cement (RCC) on the optical properties of different computer-aided design and computer-aided manufacturing (CAD/CAM) ceramics.

Materials And Methods: Specimens (N = 220, thickness: 0.9 ± 0. Read More

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Biaxial flexural strength of various CAD-CAM glass-ceramic materials.

Am J Dent 2021 Apr;34(2):91-96

Advanced Education in Esthetic and Operative Dentistry Program, Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, Massachusetts, USA,

Purpose: To evaluate and compare the flexural strength of three CAD-CAM glass-ceramic materials and to investigate the effect of various surface treatments on their flexural strength.

Methods: 120 rectangular specimens were fabricated from three different types of CAD-CAM ceramic blocks and were divided into three groups: zirconia-reinforced lithium silicate (Celtra Duo, Group 1), leucite-reinforced glass-ceramic (IPS Empress CAD, Group 2), and lithium disilicate ceramic (IPS e.max CAD, Group 3). Read More

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In vitro evaluation of material dependent force damping behavior of implant-supported restorations using different CAD-CAM materials and luting conditions.

J Prosthet Dent 2021 Apr 28. Epub 2021 Apr 28.

Associate Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt; Head of Fixed prosthodontics department, Faculty of Dentistry, British University, Cairo, Egypt.

Statement Of Problem: Although force-damping behavior that matches natural teeth may be unobtainable, an optimal combination of crown material and luting agent might have a beneficial effect on the force absorption capacity of implant-supported restorations. However, the force-absorbing behavior of various restorative materials has not yet been satisfactorily investigated.

Purpose: The purpose of this in vitro study was to evaluate the material dependent force-damping behavior of implant-supported crowns fabricated from different computer-aided design and computer-aided manufacturing (CAD-CAM) materials luted to implant abutments under different conditions. Read More

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Randomized clinical trial of zirconia and polyetheretherketone implant abutments for single-tooth implant restorations: A 5-year evaluation.

J Prosthet Dent 2021 Apr 28. Epub 2021 Apr 28.

Assistant Professor, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia.

Statement Of Problem: Titanium-supported polyetheretherketone (PEEK) abutments provide an economic alternative to zirconia abutments in esthetically important areas. Research comparing the performance regarding esthetics, longevity, and biologic parameters of PEEK abutments is lacking.

Purpose: The purpose of this clinical study was to determine whether PEEK implant abutments provide similar esthetic and biologic parameters and survival rates as zirconia implant abutments. Read More

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Mechanical Behavior of Different Restorative Materials and Onlay Preparation Designs in Endodontically Treated Molars.

Materials (Basel) 2021 Apr 12;14(8). Epub 2021 Apr 12.

Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos 12245-000, Brazil.

This study evaluated the effect of the combination of three different onlay preparation designs and two restorative materials on the stress distribution, using 3D-finite element analysis. Six models of first lower molars were created according to three preparation designs: non-retentive (nRET), traditional with occlusal isthmus reduction (IST), and traditional without occlusal isthmus reduction (wIST); and according to two restorative materials: lithium-disilicate (LD) and nanoceramic resin (NR). A 600 N axial load was applied at the central fossa. Read More

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Modulation of Lithium Disilicate Translucency through Heat Treatment.

Materials (Basel) 2021 Apr 21;14(9). Epub 2021 Apr 21.

Department of Prosthodontics, Korea University Guro Hospital, Seoul 08308, Korea.

The aim of this study was to present a control method for modulating the translucency of lithium disilicate ceramics through thermal refinement. Identical lithium disilicate blocks were thermally refined using four different heat treatment schedules, and the microstructure, translucency, and flexural strength of the ceramics were investigated in detail by SEM, spectroscopy, and a piston-on-three-ball test. The results showed that ceramics treated under higher heat had larger grains, with an average size between 240 and 1080 nm. Read More

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Immediate implant with provisionalization and soft tissue grafting after 4-year follow-up.

Clin Adv Periodontics 2021 Apr 29. Epub 2021 Apr 29.

Faculty of Dental Medicine at the Universidade Católica Portuguesa, Viseu, Portugal.

Introduction: This paper presents a case report of immediate implant placement (IIP) with a provisionalization technique to restore function and esthetics with follow-up after 4 years.

Case Presentation: Minimally traumatic extraction was performed with IIP, soft-tissue grafting, and immediate provisional crown. Six months after optimal healing, the patient was submitted to an esthetic restorative work through veneers in lithium disilicate. Read More

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Fracture Resistance of Zirconia, Polyetheretherketone, and Polyetherketoneketone Implant Abutments After Aging.

Int J Oral Maxillofac Implants 2021 Mar-Apr;36(2):332-340

Purpose: This study aimed to assess the fracture resistance of zirconia (Zr), reinforced polyetheretherketone (PEEK), and polyetherketoneketone (PEKK) implant abutments restored with glass-ceramic crowns after thermomechanical aging.

Materials And Methods: Zr, reinforced PEEK, and PEKK titanium base abutments were divided into three groups (n = 10). CAD/CAM maxillary central incisor crowns were fabricated using monolithic lithium disilicate and luted to the abutments using resin cement. Read More

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Mechanical Stability of Restorations Supported by Titanium Base, Zirconia, and Polyetherketoneketone Abutments on One- and Two-Piece Zirconia Implants.

Int J Oral Maxillofac Implants 2021 Mar-Apr;36(2):313-321

Purpose: To evaluate survival, complication rates, and bending moments of one- and two-piece zirconia implants restored with different abutment materials and lithium disilicate crowns after aging, compared to titanium implants restored with titanium base-supported lithium disilicate crowns.

Materials And Methods: Sixty anterior crowns were either screwretained on two-piece titanium implants (C) and two-piece zirconia implants (T1, T2, T3) or cemented on one-piece zirconia implants (T4), resulting in 5 groups with 12 specimens each. For the screw-retained crowns, different abutment materials and implant connections were tested: titanium base with internal conical connection and horizontal joint component (C and T2), zirconia with internal hexagonal connection and horizontal joint component (T1), and polyetherketoneketone with internal hexagonal connection and horizontal joint component (T3). Read More

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