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Cement film thickness

Jason R Garner, Michael N Wajdowicz, Nicholas B DuVall, Howard W Roberts
STATEMENT OF PROBLEM: Two resin-modified glass-ionomer (RMGI)-based luting agents have been recently marketed without independent reports of their physical properties. PURPOSE: The purpose of this in vitro study was to evaluate selected physical properties of 2 newly marketed RMGI luting agents and compare the findings with traditional materials. MATERIAL AND METHODS: Specimens (N=12) of Nexus RMGI, UltraCem, GC Fuji Cem 2, and RelyX Luting Plus were fabricated using standardized molds for flexural strength and fracture toughness according to manufacturer recommendations and stored in physiologic phosphate-buffered saline solution at 37°C until testing...
September 22, 2016: Journal of Prosthetic Dentistry
Niélli Caetano de Souza, Maurem Leitão Marcondes, Ricardo Vaz Breda, João Batista Blessmann Weber, Eduardo Gonçalves Mota, Ana Maria Spohr
The aim of this study was to evaluate the thickness of resin cements in the root thirds when using conventional fiberglass posts (CP) and relined fiberglass posts (RP) in weakened roots and to evaluate the morphological characteristics of the dentin-resin interface. Forty human maxillary anterior teeth had the crown sectioned below the cemento-enamel junction. The canals were endodontically treated and weakened with diamond burs. Teeth were divided into four groups (n = 10): Group 1 - CP + RelyX ARC; Group 2 - CP + RelyX U200; Group 3 - RP + RelyX ARC; and Group 4 - RP + RelyX U200...
2016: Brazilian Oral Research
Daiana Kelly Lopes Hernandes, Cesar Augusto Galvão Arrais, Erick de Lima, Paulo Francisco Cesar, José Augusto Rodrigues
OBJECTIVE: This in vitro study evaluated the effect of two different shades of resin cement (RC- A1 and A3) layer on color change, translucency parameter (TP), and chroma of low (LT) and high (HT) translucent reinforced lithium disilicate ceramic laminates. MATERIAL AND METHODS: One dual-cured RC (Variolink II, A1- and A3-shade, Ivoclar Vivadent) was applied to 1-mm thick ceramic discs to create thin RC films (100 µm thick) under the ceramics. The RC was exposed to light from a LED curing unit...
July 2016: Journal of Applied Oral Science: Revista FOB
S Gunsoy, M Ulusoy
BACKGROUND AND PURPOSE: The purpose of this study was to evaluate the internal and marginal fit of chrome cobalt (Co-Cr) crowns were fabricated with laser sintering, computer-aided design (CAD) and computer-aided manufacturing, and conventional methods. MATERIALS AND METHODS: Polyamide master and working models were designed and fabricated. The models were initially designed with a software application for three-dimensional (3D) CAD (Maya, Autodesk Inc.). All models were fabricated models were produced by a 3D printer (EOSINT P380 SLS, EOS)...
September 2016: Nigerian Journal of Clinical Practice
Issam Khalil, Alfred Naaman, Josette Camilleri
INTRODUCTION: Sealers based on tricalcium silicate cement aim at an interaction of the sealer with the root canal wall, alkalinity with potential antimicrobial activity, and the ability to set in a wet field. The aim of this study was to characterize and investigate the properties of a new tricalcium silicate-based sealer and verify its compliance to ISO 6876 (2012). METHODS: A new tricalcium silicate-based sealer (Bio MM; St Joseph University, Beirut, Lebanon), BioRoot RCS (Septodont, St Maure de Fosses, France), and AH Plus (Dentsply, DeTrey, Konstanz, Germany) were investigated...
October 2016: Journal of Endodontics
Ataís Bacchi, Carmem S Pfeifer
OBJECTIVES: Thio-urethane oligomers have been shown to reduce stress and increase toughness in highly filled composite materials. This study evaluated the influence of thio-urethane backbone structure on rheological and mechanical properties of resin cements modified with a fixed concentration of the oligomers. METHODS: Thio-urethane oligomers (TU) were synthesized by combining thiols - pentaerythritol tetra-3-mercaptopropionate (PETMP) or trimethylol-tris-3-mercaptopropionate (TMP) - with isocyanates - 1,6-hexanediol-diissocyante (HDDI) (aliphatic) or 1,3-bis(1-isocyanato-1-methylethyl)benzene (BDI) (aromatic) or dicyclohexylmethane 4,4'-diisocyanate (HMDI) (cyclic), at 1:2 isocyanate:thiol, leaving pendant thiols...
August 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Natália Araújo Silva Prado, Reinaldo de Souza Ferreira, Marcos Henrique de Pinho Maurício, Sidnei Paciornik, Mauro Sayão de Miranda
The present study evaluated the influence of the cement film thickness on the push-out bond strength of glass fiber posts in the cervical, medium, and apical thirds of root canal spaces. Thirty roots were randomly divided into three groups, according to the fiber post system's drills: (G1) #2; (G2) #3; (G3) #4. The posts were cemented using a self-adhesive cement, and a small amount of powdered Rhodamine B was used as a stain. Images of both sides of each slice were obtained before and after the push-out test...
2016: International Journal of Dentistry
Masanao Inokoshi, Pong Pongprueksa, Jan De Munck, Fei Zhang, Kim Vanmeensel, Shunsuke Minakuchi, Jozef Vleugels, Ignace Naert, Bart Van Meerbeek
PURPOSE: To assess the light irradiance (LI) delivered by two light-curing units and to measure the degree of conversion (DC) of three composite cements and one flowable composite when cured through zirconia or ceramic-veneered zirconia plates with different thicknesses. MATERIALS AND METHODS: Three dual-curing composite cements (Clearfil Esthetic Cement, Panavia F2.0, G-CEM LinkAce) and one light-curing flowable composite (G-aenial Universal Flo) were investigated...
2016: Journal of Adhesive Dentistry
Neimar Sartori, Lais Dalmagro Peruchi, Jin-Ho Phark, Sillas Duarte
OBJECTIVES: To determine the effects of intrinsic wetness on the formation of dentin bonding interfaces of four resin cement systems bonded to dentin under different pulpal pressures. METHODS: Thirty-six freshly extracted third molars were selected and processed for dentin μTBS. The teeth were randomly assigned into 12 experimental groups, according to the adhesive luting system [Adper Single Bond Plus (3M ESPE) combined with two luting agents RelyX ARC (3M ESPE) and heated Filtek Z250 Universal Restorative (3M ESPE), Clearfil CD Bond (Kuraray) combined with Clearfil Esthetic Cement (Kuraray), and RelyX Unicem 2 Automix (3M ESPE)] and pulpal pressure (0, 5, and 20 cm of simulated pulpal pressure)...
May 2016: Journal of Dentistry
C Adán, J Marugán, R van Grieken, K Chien, L Pershin, T Coyle, J Mostaghimi
Titanium dioxide coatings were deposited on the surface of titanium foils by Thermal Plasma Spray (TPS) process. Three different TiO2 coatings were prepared using the commercial TiO2-P25 nanopowder and titanium isopropoxide precursor solution as feed-stocks. Structure and morphology of the TiO2-P25 powder and the plasma sprayed coatings were analyzed by X-ray diffraction (XRD), Raman spectroscopy, N2 adsorption-desorption isotherms, UV-visible spectroscopy and Scanning Electron Microscopy (SEM). XRD and Raman results indicate that the TiO2 coatings were composed of an anatase/rutile mixture that is conditioned by the suspension composition used to be sprayed...
September 2015: Journal of Nanoscience and Nanotechnology
Izabela Cristina Maurício Moris, Juliana Elias de Oliveira, Adriana Cláudia Lapria Faria, Ricardo Faria Ribeiro, Renata Cristina Silveira Rodrigues
This study aimed to verify marginal fit and the effect of cement film thickness standardization on retention of provisional crowns made with prefabricated acrylic cylinders on abutments, using two temporary luting agents subjected or not to mechanical cycling. Provisional crowns were made from bis-acryl (Luxatemp Fluorescence) or methyl methacrylate (Duralay) resins on acrylic cylinders and marginal fit and cement film thickness were evaluated. For retention evaluation, crowns were cemented with two temporary luting agents: non-eugenol zinc oxide (Tempbond NE) or calcium hydroxide-based (Hydcal) cements and subjected to tensile strength in a universal testing machine...
October 2015: Brazilian Dental Journal
Rodrigo Alves Tubelo, Vicente Leitune Castelo Branco, Alessandra Dahmer, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
OBJECTIVE: The study aimed to evaluate the influence of virtual learning object (VLO) in the theoretical knowledge and skill practice of undergraduate dentistry students as it relates to zinc phosphate cement (ZPC). METHODS: Only students enrolled in the dentistry course the course were included in the trial. Forty-six students received a live class regarding ZPC and were randomized by electronic sorting into the following 4 groups: VLO Immediate (GIVLOn=9), VLO longitudinal (GLVLOn=15) and two control groups without VLO (GICn=9 and GLCn=13)...
January 2016: International Journal of Medical Informatics
Shahriar Shahi, Negin Ghasemi, Saeed Rahimi, Hamidreza Yavari, Maryam Janani, Hadi Mokhtari, Mahmood Bahari, Parastu Rabbani
INTRODUCTION: The aim of the present study was to evaluate the effect of different mixing techniques (conventional, amalgamator and ultrasonic mixing) on the physical properties the working time (WT), setting time (ST), dimensional changes (DC) and film thickness (FT)] of calcium-enriched mixture (CEM) cement and mineral trioxide aggregate (MTA). METHODS AND MATERIALS: The mentioned physical properties were determined using the ISO 6786:2001 specification. Six samples of each material were prepared for three mixing techniques (totally 36 samples)...
2015: Iranian Endodontic Journal
Thitithorn Rojpaibool, Chalermpol Leevailoj
PURPOSE: To investigate the influence of cement film thickness, cement type, and substrate (enamel or dentin) on ceramic fracture resistance. MATERIALS AND METHODS: One hundred extracted human third molars were polished to obtain 50 enamel and 50 dentin specimens. The specimens were cemented to 1-mm-thick lithium disilicate ceramic plates with different cement film thicknesses (100 and 300 μm) using metal strips as spacers. The cements used were etch-and-rinse (RelyX Ultimate) and self-adhesive (RelyX U200) resin cements...
October 27, 2015: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Alice Gonçalves Penelas, Valery Martins Piedade, Ana Carolina Oliveira da Silva Borges, Laiza Tatiana Poskus, Eduardo Moreira da Silva, José Guilherme Antunes Guimarães
OBJECTIVES: This study compared the influence of cement film thickness (CFT) on bond strength (BS) and fracture resistance (FR) of fiber-reinforced composite (FRC) posts to root canal. MATERIALS AND METHODS: One hundred bovine incisors were used for BS and FR analysis (n = 10) and distributed into five experimental groups according to FRC post diameters (WhitePost DC no. 0.5, no. 1, no. 2, no. 3, no. 4), leading to five different CFTs. The canals were prepared using drill no...
May 2016: Clinical Oral Investigations
Taiseer A Sulaiman, Aous A Abdulmajeed, Terrence E Donovan, André V Ritter, Lippo V Lassila, Pekka K Vallittu, Timo O Närhi
STATEMENT OF PROBLEM: Monolithic zirconia restorations are increasingly common. Dual-polymerizing cements have been advocated for cementation. The opacious nature of zirconia restoration can attenuate light, compromising optimal resin polymerization and eventually restoration debonding. PURPOSE: The purpose of this in vitro study was to evaluate the influence of material thickness on light irradiance, radiant exposure, and the degree of monomer conversion (DC) of 2 dual-polymerizing resin cements light-polymerized through different brands of monolithic zirconia...
July 2015: Journal of Prosthetic Dentistry
A Sahafi, A R Benetti, S Flury, A Peutzfeldt
The aim of this study was to investigate the effect of the cement film thickness of a zinc phosphate or a resin cement on retention of untreated and pretreated root canal posts. Prefabricated zirconia posts (CosmoPost: 1.4 mm) and two types of luting cements (a zinc phosphate cement [DeTrey Zinc] and a self-etch adhesive resin cement [Panavia F2.0]) were used. After removal of the crowns of 360 extracted premolars, canines, or incisors, the root canals were prepared with a parallel-sided drill system to three different final diameters...
July 2015: Operative Dentistry
Chang-sheng Li
OBJECTIVE: To analyze the surgical failure of lumbar spondylolisthesis and investigate the clinical effect of three vertebral reduction and fixation in revision of lumbar spondylolisthesis. METHODS: The clinical data of 19 patients underwent revision to lumbar spondylolisthesis was retrospectively analyzed between January 2009 and December 2012. There were 12 males and 7 females, aged from 36 to 68 years old with an average of 51.5 years. Reduction loss of olisthy segment had in 6 cases, internal fixation loosening or breakage had in 5 cases, slippage aggravating had in 8 cases...
September 2014: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Djordje Antonijević, Dragan Ilić, Vesna Medić, Slobodan Dodić, Kosovka Obradović-Djuriĉić, Zoran Rakoĉević
BACKGROUND/AIM: The radiopacity of an endodontic material can considerably vary as measured on film and a digital sensor. Digital radiography offers numerous advantages over conventional film-based radiography in dental clinical practice regarding both diagnostic capabilities and postintervention procedures. The aim of this study was to investigate the capacity of conventional and charge-conpled device (CCD) based digital radiography to detect material on radiograph depending on the radio-pacifying agent present in the mate- rial...
November 2014: Vojnosanitetski Pregled. Military-medical and Pharmaceutical Review
Andrew R Kious, Michael L Myers, William W Brackett, Van B Haywood
STATEMENT OF PROBLEM: Regardless of the type of indirect restoration being fabricated, optimizing fit at cementation is a challenge. Several disclosing agents have been recommended to identify intaglio surface contacts that may result in incomplete seating and poorly adapted margins. The International Organization for Standardization has established a standard of 25 μm for the maximum film thickness for water-based cements. To accurately predict the clinical behavior of a luting cement, the disclosing agents themselves should have a film thickness no greater than 25 μm...
November 2014: Journal of Prosthetic Dentistry
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