Read by QxMD icon Read

Lithium disilicate

Sai Kham Lyann, Tomohiro Takagaki, Toru Nikaido, Motohiro Uo, Masaomi Ikeda, Alireza Sadr, Junji Tagami
PURPOSE: To evaluate the influence of different surface treatments of lithium disilicate glass ceramics on the bonding efficacy of three luting composites. MATERIALS AND METHODS: A total of 450 blocks of e.max CAD (Ivoclar Vivadent) ground with 600-grit silicon carbide paper were prepared and divided into three groups (n = 150) according to the composite cements used: Variolink Esthetic DC (VE), Multilink Automix (MA), and SpeedCEM (SC). Each group was further divided into five subgroups (n = 10) according to the surface treatment performed: no treatment (control), Monobond Plus (MP), 37% phosphoric acid and Monobond Plus (PA), < 5% hydrofluoric acid and Monobond Plus (HF), and Monobond Etch & Prime (ME)...
June 14, 2018: Journal of Adhesive Dentistry
Fabio Antonio Piola Rizzante, Paula Minatel Locatelli, Thiago Soares Porto, Ana Flávia Sanches Borges, Rafael Francisco Lia Mondelli, Sérgio Kiyoshi Ishikiriama
The purpose of this in vitro study was to compare the micro hardness, color stability/ΔE, and degree of conversion/DC of a resin cement light cured through different ceramic spacers. Lithium-disilicate ceramic samples were obtained from IPS E-max CAD blocks (HT A1) and IPS in-Ceram (transparent neutral); and divided in 7 groups (n = 8 for each test): CTR/control group; 06 M/0.6 mm monolithic; 12 M/1.2 mm monolithic; 20 M/2.0 mm monolithic; 06B/0.4 + 0.2 mm bilayered; 12B/1.0 + 0.2 mm bilayered; 20B/1...
June 4, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Gabriela Nishioka, Catina Prochnow, Aline Firmino, Marina Amaral, Marco Antonio Bottino, Luiz Felipe Valandro, Melo Renata Marques de
This in vitro study evaluated the fatigue strength of different ceramic materials indicated for monolithic restorations. Disc-shaped specimens were made according to ISO 6872 from five different ceramic materials: feldspathic ceramic (FC), polymer-infiltrated ceramic network (PIC), lithium disilicate glass-ceramic (LD), zirconia-reinforced lithium silicate glass-ceramic (ZLS), and high translucent tetragonal zirconia polycrystals doped by yttrium (YZ-HT). After obtaining the mean of each material (n = 5) from monotonic load-to-failure tests, specimens (n = 20) were subjected to fatigue tests (staircase method) using a biaxial flexural setup (piston-on-three-balls), to determine the fatigue strength...
June 11, 2018: Brazilian Oral Research
Bruno Salles Sotto-Maior, Rafael Corrêa Carneiro, Carlos Eduardo Francischone, Neuza Maria Souza Picorelli Assis, Karina Lopes Devito, Plinio Mendes Senna
PURPOSE: To evaluate the fracture resistance after the thermal and mechanical fatigue of feldspathic, lithium disilicate, and resin-modified CAD/CAM monolithic crowns cemented onto a universal post abutment. MATERIALS AND METHODS: A right second mandibular molar was designed in CAD/CAM software, and 30 crowns were machined using three different materials (n = 10): feldspathic ceramic, finished only with a glaze cycle (G1); lithium disilicate, sintered and finished with a glaze cycle (G2); and resin, modified by nanoceramic and finished with rubber (G3)...
June 13, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Felipe V Martins, Wesley F Vasques, Edgard M Fonseca
PURPOSE: The purpose of this meta-analysis was to evaluate how the thickness variations in ceramic restorations of lithium disilicate and the use of different photopolymerizers influence the degree of conversion of the resin cements. METHODS: This study was performed according to the PRISMA checklist. The bibliographic research was performed to identify in vitro studies until December 2017 in the databases MEDLINE via PubMed, Web of Science, and Scopus. The selected studies were submitted to bias risk assessment...
June 7, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Farhad Vahidi
Pseudo class III malocclusion is reverse anterior occlusion or anterior cross-bite with first molars and canines in a class I relationship. It is very important to diagnose the pseudo class III from true skeletal class III. The combination of anterior displacement of the mandible, tooth wear, and loss of occlusal vertical dimension (OVD) in adults may result anterior cross-bite. The key factor in diagnosis of this malocclusion is an interdisciplinary approach with an orthodontist. Cephalometric images are essential for diagnosis of pseudo class III mal-occlusion...
June 7, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Carlos-Eduardo Datte, João-Paulo-Mendes Tribst, Amanda-Maria-de Oliveira Dal Piva, Renato-Sussumu Nishioka, Marco-Antonio Bottino, Alexandre-Duarte M Evangelhista, Fabrício M de M Monteiro, Alexandre-Luiz-Souto Borges
Background: To assist clinicians in deciding the most suitable restorative materials to be used in the crowns and abutment in implant rehabilitation. Material and Methods: For finite element analysis (FEA), a regular morse taper implant was created using a computer aided design software. The implant was inserted at the bone model with 3 mm of exposed threads. An anatomic prosthesis representing a first maxillary molar was modeled and cemented on the solid abutment...
May 2018: Journal of Clinical and Experimental Dentistry
Daniel Sundfeld, Alan Rodrigo Muniz Palialol, Ana Paula Piovesan Fugolin, Gláucia Maria Bovi Ambrosano, Lourenço Correr-Sobrinho, Luis Roberto Marcondes Martins, Carmem Silvia Pfeifer
To investigate how the hydrofluoric acid (HF) concentrations applied to a lithium disilicate glass-ceramic (EMX) affects the surface morphology and microtensile bond strength (μTBS) of ceramics to dentin, using light-cured resin cements with or without UDMA. Sixty-three EMX square ceramic blocks were etched for 20 seconds using different HF concentrations (1%, 5% and 10%) and luted to dentin using two types of resin cement combinations: BisGMA/TEGDMA and BisGMA/TEGDMA/UDMA (n = 10). Each bonded EMX-dentin block was sectioned to obtain 1 mm2 sticks for μTBS evaluation...
May 24, 2018: Brazilian Oral Research
Parissa Nassary Zadeh, Nina Lümkemann, Beatrice Sener, Marlis Eichberger, Bogna Stawarczyk
STATEMENT OF PROBLEM: The development of zirconia materials with optimized properties has been rapid, and studies comparing the mechanical and optical properties of recently introduced zirconia with lithium disilicate materials are limited. PURPOSE: The purpose of this in vitro study was to compare the mechanical and optical properties of cubic/tetragonal zirconia materials with those of a lithium disilicate ceramic. MATERIAL AND METHODS: Specimens were fabricated from 6 different noncolored zirconia materials: Ceramill Zolid FX (CZ), CopraSmile (CS), DD cubeX2 (DD), NOVAZIR MaxT (NZ), priti multidisc ZrO₂ (PD), and StarCeram Z-Smile (SC), and 1 lithium disilicate ceramic as a control, IPS e...
May 25, 2018: Journal of Prosthetic Dentistry
Peerapat Kaweewongprasert, Kamolphob Phasuk, John A Levon, George J Eckert, Sabrina Feitosa, Luiz F Valandro, Marco C Bottino, Dean Morton
PURPOSE: To evaluate the fatigue failure load of distinct lithium disilicate restoration designs cemented on a chairside titanium base for maxillary anterior implant-supported restorations. MATERIALS AND METHODS: A left-maxillary incisor restoration was virtually designed and sorted into 3 groups: (n = 10/group; CTD: lithium disilicate crowns cemented on custom-milled titanium abutments; VMLD: monolithic full-contour lithium disilicate crowns cemented on a chairside titanium-base; VCLD: lithium disilicate crowns bonded to lithium disilicate customized anatomic structures and then cemented onto a chairside titanium base)...
May 25, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Ahmed El Gamal, Etienne Medioni, Jean Paul Rocca, Carlo Fornaini, Nathalie Brulat-Bouchard
Background and aims: The purpose of this study is to determine the effect of CO2 laser irradiation in comparison with sandblasting (Sb), hydrofluoric acid (Hf) and silane coupling agent (Si) on shear bond strength (SBS) of resin cement to CAD/CAM ceramics bonded to dentin. Material and Methods: Forty-eight (CAD/CAM) ceramic discs were prepared and grouped by material, i.e. lithium disilicate (Emax CAD) and zirconia ceramic (Emax ZirCAD), distributed into four different groups: group A, lithium disilicate (Li) CO2 /HF/Si; group B, Li: HF/Si; group C, zirconia (Zr) CO2 /Sb/Si; group D, Zr: Sb/Si...
March 31, 2018: Laser Therapy
Maitê Munhoz Scherer, Catina Prochnow, Andressa Borin Venturini, Gabriel Kalil Rocha Pereira, Thiago Augusto de Lima Burgo, Marília Pivetta Rippe, Luiz Felipe Valandro
OBJECTIVES: To evaluate the effect of different glass-ceramic surface treatments and aging on the fatigue failure load of a lithium disilicate glass-ceramic adhesively cemented to a dentin analogue material. METHODS: One hundred and twenty (120) disc-shaped lithium disilicate specimens (Ø=10mm, thickness=1.5mm) were produced and randomly allocated (n=20) into 6 groups, considering 2 study factors: "surface treatment" in 3 levels (SIL-silane application only; HF5+SIL-5% hydrofluoric acid etching and silane application; ME&P-etching with an one-step ceramic primer), and "storage" in 2 levels (baseline-storage for 7 days; aging-storage for 90 days+12,000 thermal cycles)...
May 19, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Jose C Romanini-Junior, Rose Y Kumagai, Luiz F Ortega, Jose A Rodrigues, Alessandra Cassoni, Ronaldo Hirata, Andre F Reis
OBJECTIVE: To test the effects of different adhesive protocols and silane application on the adhesive durability to a Lithium Disilicate reinforced glass ceramic. METHODS: Forty disks of 13 mm diameter (E.max Press) were used. After etching with 9.5% HF for 20 seconds, disks were randomly assigned into 4 groups according to the adhesive/silane protocol: silane application only (SIL); silane application followed by adhesive (SILXP-XP Bond); silane-containing adhesive (SBU-ScotchBond Universal); silane application followed by silane-containing adhesive (SILSBU)...
May 15, 2018: Journal of Esthetic and Restorative Dentistry
Mohammad Esmaeel Ebrahimi Chaharom, Fatemeh Pournaghi Azar, Narmin Mohammadi, Rezvan Nasiri
Background. This study was undertaken to evaluate the repair bond strength of lithium disilicate glass ceramic to a silorane-based composite resin after surface preparation with Nd:YAG and Er,Cr:YSGG lasers. Methods. A total of 102 lithium disilicate glass ceramic samples (IPS e.max Press), measuring 5 mm in diameter and 4 mm in thickness, were randomly assigned to 6 groups (n=17): group 1, no surface preparation (control); group 2, acid etching with 9.5% hydrofluoric acid (HF); group 3, surface preparation with 4...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
Ebrahim Maghami, Ehsan Homaei, Khalil Farhangdoost, Edmond Ho Nang Pow, Jukka Pekka Matinlinna, James Kit-Hon Tsoi
PURPOSE: The aim of this study was to investigate and quantify the effect of preparation design parameters on a premolar restored with two different CAD/CAM ceramic crowns by three-dimensional finite element analysis (FEA). METHODS: A restored human first premolar was digitized by a micro-CT scanner and a 3D model was created by a medical image processing software (Mimics). Following segmentation, dentine and ceramic were extracted by a surface meshing software (3-matic)...
May 3, 2018: Journal of Prosthodontic Research
Moshabab A Asiry, Ibrahim AlShahrani, Samer M Alaqeel, Bangalore H Durgesh, Ravikumar Ramakrishnaiah
PURPOSE: The adhesion strength of orthodontic brackets bonded to dental glass ceramics was evaluated after ceramic surface was treated with two-step and one-step surface conditioning systems, and subjecting to thermo-cycling. MATERIALS AND METHOD: A total of forty specimens were fabricated from silica based glass ceramic (lithium disilicate) by duplicating the buccal surface of maxillary first premolar. The specimens were randomly assigned to two experimental groups (n = 20), group one specimens were treated with two-step surface conditioning system (IPS ceramic etching gel™ and Monobond plus™) and group two specimens were treated with one-step surface conditioning system (Monobond etch and prime™)...
April 26, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Ramtin Sadid-Zadeh, Adrian Farsaii, Athena Goodarzi, Elaine L Davis
STATEMENT OF PROBLEM: Different techniques are used to fabricate complete coverage restorations. Each fabrication technique requires a specific preparation design that may violate a principle of tooth preparation, that is, conservation of tooth structure. PURPOSE: The purpose of this in vitro study was to compare the volume of loss of mandibular first molar structure associated with a preparation for computer-aided design and computer-aided manufacturing (CAD-CAM) versus conventionally fabricated complete coverage restorations...
April 30, 2018: Journal of Prosthetic Dentistry
Ali Ramadhan, Geoffrey A Thompson, Georgios Maroulakos, David Berzins
STATEMENT OF PROBLEM: Research evaluating load-to-failure of pressed lithium disilicate glass-ceramic (LDGC) with a clinically validated test after adjustment and repair procedures is scarce. PURPOSE: The purpose of this in vitro study was to investigate the effect of the simulated chairside adjustment of the intaglio surface of monolithic pressed LDGC and procedures intended to repair damage. MATERIAL AND METHODS: A total of 423 IPS e.max Press (Ivoclar Vivadent AG) disks (15 mm diameter, 1 mm height) were used in the study...
April 30, 2018: Journal of Prosthetic Dentistry
Rabia Arif, Burak Yilmaz, Aras Mortazavi, Tuncer B Ozcelik, William M Johnston
STATEMENT OF PROBLEM: The effect of a recently introduced metal opaquer when used to mask the color of a titanium abutment under ceramic crown systems is unknown. PURPOSE: The purpose of this study was to compare the color coordinates of 3 ceramic crown types-characterized monolithic lithium disilicate (LDC) (IPS e.max; Ivoclar Vivadent AG), layered lithium disilicate (LDL) (IPS e.max; Ivoclar Vivadent AG), and layered zirconia (ZL) (H.C. Starck)-on 3 abutment configurations, nonopaqued titanium (Ti), resin opaqued titanium (Op), and zirconia (Zir)...
April 30, 2018: Journal of Prosthetic Dentistry
Nicola Mobilio, Alberto Fasiol, Santo Catapano
PURPOSE: To assess the clinical performance of lithium disilicate single restorations on natural teeth. MATERIALS AND METHODS: All patients who received lithium disilicate single restorations between 2009 and 2013 at the dental clinic of the University of Ferrara were recalled for clinical evaluation. A total of 43 partial and total restorations in 17 patients were evaluated from a minimum of 36 months follow-up to a maximum of 81 months follow-up, with a mean follow-up of 51 months...
May 2018: International Journal of Prosthodontics
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"