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Lithium disilicate

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https://www.readbyqxmd.com/read/29682833/fracture-resistance-of-pressed-and-milled-lithium-disilicate-anterior-complete-coverage-restorations-following-endodontic-access-preparation
#1
Petrina Gerogianni, Wen Lien, Despoina Bompolaki, Ronald Verrett, Stephan Haney, Patrick Mattie, Russell Johnson
PURPOSE: This in vitro study evaluated the fracture resistance and clinical prognosis of anterior lithium disilicate crowns (e.max Press and e.max CAD), following endodontic access and repair. The research design simulates intraoral loading conditions to produce clinically applicable results. MATERIALS AND METHODS: Monolithic anterior crowns, based on #8 anatomy, were fabricated from e.max Press ingots and e.max CAD blocks and adhesively bonded on identical dies milled out of a dentin analog material (NEMA G10)...
April 22, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29675516/biomechanical-effect-of-ferrule-on-incisors-restored-with-a-fiberglass-post-and-lithium-disilicate-ceramic-crown-after-thermal-cycling-and-fatigue-loading
#2
Andréa Dolores Correia Miranda Valdivia, Monise de Paula Rodrigues, Aline Aredes Bicalho, Bart Van Meerbeek, Jos Vander Sloten, Roberto Sales E Pessoa, Carlos José Soares
PURPOSE: To evaluate the biomechanics of endodontically treated incisors restored with a fiberglass post and a CAD/CAM lithium-disilicate ceramic crown with/without a ferrule after thermal and mechanical aging. MATERIALS AND METHODS: Twenty bovine incisors were divided into two groups (n = 10): 1. Fe, with a ferrule of 2 mm, and 2. NFe, without a ferrule. After endodontic treatment, the teeth were restored using a fiberglass post (Exacto 3, Angelus) and composite core (Tetric Ceram, Ivoclar Vivadent)...
April 19, 2018: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29675515/ceramic-surface-treatment-with-a-single-component-primer-resin-adhesion-to-glass-ceramics
#3
Mayara Prado, Catina Prochnow, Ana Maria Estivalete Marchionatti, Paolo Baldissara, Luiz Felipe Valandro, Vinicius Felipe Wandscher
PURPOSE: To evaluate the microshear bond strength (μSBS) of composite cement bonded to two machined glass ceramics and its durability, comparing conventional surface conditioning (hydrofluoric acid + silane) to a one-step primer (Monobond Etch & Prime). MATERIALS AND METHODS: Machined slices of lithium disilicate ceramic (LDC) (IPS e.max CAD) and feldspathic ceramic (FC) (VITA Mark II) glass ceramics were divided into two groups (n = 10) according to two factors: 1...
April 19, 2018: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29670735/microleakage-of-porcelain-laminate-veneers-cemented-with-different-bonding-techniques
#4
Satheesh B Haralur
Background: Porcelain laminate veneers (PLV) are continued to be popular in modern dental practice due to its high aesthetic outcome and conservative tooth preparation. The composite resins are commonly used as luting agents for cementation of PLV. Polymerisation shrinkage induced marginal gap and interfacial leakage is the persistent limitation with the resin luting cements. The objective of the study was to assess the effect of various dentin bonding techniques on the microleakage after accelerated ageing in porcelain laminate veneres...
February 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29663086/marginal-adaptation-of-lithium-disilicate-ceramic-crowns-cemented-with-three-different-resin-cements
#5
Ingrid Peroz, Triantafyllos Mitsas, Kurt Erdelt, Niko Kopsahilis
OBJECTIVES: The cementation process and cementation materials have an influence on the marginal adaptation of restorations. The gap could be affected by thermal and mechanical loading (TCML). The computerized x-ray microtomography (μCT) method offers the possibility of measuring the marginal gap without destruction of the restoration. The aim of this study was to evaluate the marginal gap (MG) and the absolute marginal discrepancy (AMD) before and after TCML. MATERIALS AND METHODS: Thirty-nine human premolars were prepared for full ceramic crowns made of lithium disilicate...
April 17, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29655413/the-science-and-application-of-ips-e-max-dental-ceramic
#6
REVIEW
Alec Willard, Tien-Min Gabriel Chu
The aim of this paper is to report the state of current literature and recommendations for the lithium disilicate glass-ceramic IPS e.Max. The materials science, mechanical and optical properties were reviewed. Additionally an assessment was conducted of current implementation recommendations and clinical outcomes. This paper provides a brief historical overview, summary of the findings the findings of current literature, and clinical recommendation for the use of IPS e.Max CAD in dental applications.
April 2018: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/29643874/effect-of-erbium-yttrium-scandium-gallium-and-garnet-er-ysgg-laser-on-the-bond-strength-of-lithium-disilicate-ceramics
#7
Mohammed Qasim Al Rifaiy
Objectives: To assess the bond strength of LD ceramics with resin composite material and surface conditioning using Er: YSGG laser and HF acid. Methods: Thirty LD ceramic (Emax, Ivoclar vivadent) discs were prepared using hot pressing technique and treated with hydroflouric acid (Group-1-HF acid) (9%) (n=10) and Er- yttrium, scandium, gallium and garnet laser (Group-2-ER-YSGG laser) (Waterlase iPlus, 10 Hz and power of 0.5 W, pulse duration of 230 μs) (n=10). Ten specimens were left untreated to be included as controls (Group-3-Control)...
January 2018: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29627213/macro-and-microtopographical-examination-and-quantification-of-cad-cam-composite-resin-2-and-3-body-wear
#8
Carolin Stöckl, Rüdiger Hampe, Bogna Stawarczyk, Miriam Haerst, Malgorzata Roos
STATEMENT OF PROBLEM: The selection of an appropriate restorative material based on wear behavior is important for the long-term success of a dental restoration. For computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins, information about their wear resistance and wear mechanism is scarce. PURPOSE: The purpose of this in vitro study was to compare the 2- and 3-body wear of CAD-CAM composite resins with that of lithium disilicate ceramic and to develop analysis software...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29607851/evaluation-of-the-fracture-resistance-of-computer-aided-design-computer-aided-manufacturing-monolithic-crowns-prepared-in-different-cement-thicknesses
#9
N Polat Sagsoz, N Yanıkoglu
Introduction: The purpose of this study was to evaluate the fracture resistance of monolithic computer-aided design/computer-aided manufacturing (CAD/CAM) crowns that are prepared with different cement thickness. Materials and Methods: For this investigation, a human maxillary premolar tooth was selected. Master model preparation was performed with a demand bur under water spray. Master die was taken to fabricate 105 epoxy resin replicas. The crowns were milled using a CEREC 4 CAD/CAM system (Software Version, 4...
April 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29605190/fracture-strength-testing-of-crowns-made-of-cad-cam-composite-resins
#10
Ryota Okada, Masaki Asakura, Akihiro Ando, Hirokazu Kumano, Seiji Ban, Tatsushi Kawai, Jun Takebe
PURPOSE: The purpose of this study was to ascertain whether computer aided design/computer aided manufacturing (CAD/CAM) composite resin crowns have sufficient strength to withstand the bite force of the molar teeth. The null hypothesis was that the fracture strength of CAD/CAM composite resin crowns is lower than the average maximum bite force of the molar tooth. METHODS: The crowns, which shape is the right maxillary first molar, were fabricated using four CAD/CAM blanks made of composite resins (Block HC: HC, KZR-CAD HR: HR, KZR-CAD HR2: HR2, Avencia Block: AVE) and one CAD/CAM blank made of lithium disilicate glass-ceramic (IPS e...
March 28, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29603709/comparative-evaluation-of-flexural-strength-of-nano-zirconia-integrated-pressable-feldspathic-and-lithium-disilicate-ceramics
#11
Chengalvarayan Sasikala, N Gopi Chander
AIM: The purpose of the study was to evaluate and compare the flexural strength of nano-reinforced zirconia feldspathic porcelain, lithium disilicate ceramics, and zirconia. MATERIALS AND METHODS: Ten bar-shaped specimens of computer-aided design (CAD)/computer-aided manufacturing (CAM) zirconia, reinforced feldspathic porcelain, and reinforced lithium disilicate were fabricated in accordance to International Organization for Standardization (ISO 6872; n = 10). Feldspathic porcelain and lithium disilicate ceramic specimens were reinforced with 5, 10, 15, and 20% of zirconia nanoparticles through a customized technique...
March 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29590666/effect-of-premolar-axial-wall-height-on-computer-aided-design-computer-assisted-manufacture-crown-retention
#12
Curt Martin, Ashley Harris, Nicholas DuVall, Michael Wajdowicz, Howard Wayne Roberts
PURPOSE: To evaluate the effect of premolar axial wall height on the retention of adhesive, full-coverage, computer-aided design/computer-assisted manufacture (CAD/CAM) restorations. MATERIALS AND METHODS: A total of 48 premolar teeth randomized into four groups (n = 12 per group) received all-ceramic CAD/CAM restorations with axial wall heights (AWH) of 3, 2, 1, and 0 mm and 16-degree total occlusal convergence (TOC). Specimens were restored with lithium disilicate material and cemented with self-adhesive resin cement...
March 28, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29570027/high-bond-durability-of-universal-adhesives-on-glass-ceramics-facilitated-by-silane-pretreatment
#13
C Yao, H Yang, J Yu, L Zhang, Y Zhu, C Huang
OBJECTIVE: This study aimed to investigate the long-term effectiveness of ceramic-resin bonding with universal adhesives in non-silane-pretreated and silane-pretreated modes after 10,000 cycles of thermal aging. METHODS AND MATERIALS: All Bond Universal, Adhese Universal, Clearfil Universal Bond, and Single Bond Universal were selected. Etched lithium disilicate glass ceramics were prepared, randomly assigned to groups, and pretreated with or without ceramic primer containing silane coupling agent prior to the application of universal adhesive (ie, silane-pretreated or non-silane-pretreated mode)...
March 23, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29551381/evaluation-of-the-ceramic-liner-bonding-effect-between-zirconia-and-lithium-disilicate
#14
Sung-Hoon Kim, Chan-Jin Park, Lee-Ra Cho, Yoon-Hyuk Huh
STATEMENT OF PROBLEM: Little information is available for the strength of bonding between zirconia and lithium disilicate as affected by surface pretreatment methods. PURPOSE: The purpose of this in vitro study was to investigate the shear bond strength (SBS) between zirconia core and lithium disilicate (LS2 ) veneered ceramic after surface pretreatments. MATERIAL AND METHODS: Fully sintered yttrium oxide partially stabilized tetragonal zirconia (Y-TZP) disk specimens were fabricated from zirconia ceramic materials...
March 15, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29551378/effect-of-surface-treatments-and-coffee-thermocycling-on-the-color-and-translucency-of-cad-cam-monolithic-glass-ceramic
#15
Gulce Alp, Meryem Gulce Subasi, William M Johnston, Burak Yilmaz
STATEMENT OF PROBLEM: The effects of surface treatments and coffee thermocycling on the color and relative translucency of a recently introduced computer-aided design and computer-aided manufacturing (CAD-CAM) monolithic glass-ceramic are unknown. PURPOSE: The purpose of this in vitro study was to evaluate the effect of coffee thermocycling on the color and relative translucency parameter (RTP) of CAD-CAM monolithic glass-ceramics after different surface treatments...
March 15, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29533499/fracture-resistance-of-cad-cam-fabricated-lithium-disilicate-mod-inlays-and-onlays-with-various-cavity-preparation-designs
#16
Hyung-In Yoon, Paul J Sohn, Sharon Jin, Elani Hawazin, Sang J Lee
PURPOSE: To examine the fracture resistance of premolars restored with CAD/CAM lithium disilicate mesio-occlusal-distal (MOD) inlays and onlays of different cavity designs. MATERIALS AND METHODS: Two widths of occlusal isthmus (75%, 100% of intercuspal distance) and three designs of cuspal coverage (none, palatal, complete) were used for the preparation of MOD inlays and onlays in the extracted maxillary premolars. Sixty lithium disilicate restorations were milled and bonded into the cavities...
March 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29525667/effect-of-fatigue-protocols-on-flexural-strength-of-lithium-disilicate-bars-with-clamped-ends
#17
Aline Serrado de Pinho Barcellos, Caroline Cotes Marinho, Jean Soares Miranda, Marina Amaral, Marcos Yutaka Shiino, Estevão Tomomitsu Kimpara
The aim of this study was compare the effect of two in vitro ageing protocols to intraoral aging on the flexural strength of a lithium disilicate (LD) ceramic bars with clamped ends. After polishing and crystallization, the both ends of the bars were cemented to a metallic device and subjected to mechanical cycling, thermomechanical cycling, or intraoral ageing. Ten volunteers used an intraoral device - similar to an occlusal splint with a balanced contact condition on the occlusal surface of the ceramic bar - during 8 h night time / 30 days...
February 10, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29519990/-in-vitro-fracture-strength-and-hardness-of-different-computer-aided-design-computer-aided-manufacturing-inlays
#18
O Sagsoz, M Yildiz, A S L Hojjat Ghahramanzadeh, A Alsaran
Objective: The purpose of this study was to examine the fracture strength and surface microhardness of computer-aided design/computer-aided manufacturing (CAD/CAM) materials in vitro. Materials and Methods: Mesial-occlusal-distal inlays were made from five different CAD/CAM materials (feldspathic ceramic, CEREC blocs; leucite-reinforced ceramic, IPS Empress CAD; resin nano ceramic, 3M ESPE Lava Ultimate; hybrid ceramic, VITA Enamic; and lithium disilicate ceramic, IPS e...
March 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29513770/marginal-adaptation-and-fracture-resistance-of-lithium-disilicate-laminate-veneers-on-teeth-with-different-preparation-depths
#19
Erhan Tuğcu, Burçin Vanlıoğlu, Yasemin Kulak Özkan, Yilmat Umut Aslan
The purpose of this study was to evaluate the marginal adaptation and fracture load of ceramic laminate veneers on teeth with different preparation depths. A total of 75 extracted intact human maxillary central incisors were prepared with three different preparation depths (P) and assigned to the following five groups (n = 15): P1 (0.3-mm depth of preparation; preparation entirely in enamel); P2 (0.5-mm depth of preparation; preparation in enamel and dentin complex); P3 (1-mm depth of preparation; preparation entirely in dentin); P4 (no preparation, only surface roughening); and P5 (unrestored, intact teeth as control)...
March 7, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29513637/self-etching-primers-vs-acid-conditioning-impact-on-bond-strength-between-ceramics-and-resin-cement
#20
Jpm Tribst, L C Anami, M Özcan, M A Bottino, R M Melo, Gsfa Saavedra
This study tested whether a self-etching surface agent and the conventional hydrofluoric acid (HF) would provide the same bonding capacity between resin cement and feldspathic (Fd) and lithium disilicate (Ld) ceramics. Ceramic blocks were cut with a low-speed diamond saw with water cooling (Isomet 1000, Buehler, Lake Bluff, IL, USA) into 20 blocks of 5 × 7 × 4 mm, which were ground flat in a polishing machine (EcoMet/AutoMet 250, Buehler) under water cooling. The blocks were randomly divided into eight groups (n=5), according to ceramic type (Ld or Fd), surface conditioning (HF + Monobond Plus or Etch and Prime), and aging by thermocycling (TC or absence-baseline)...
March 7, 2018: Operative Dentistry
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