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https://www.readbyqxmd.com/read/29383829/failure-load-effect-of-molar-axial-wall-height-with-cad-cam-ceramic-crowns-with-moderate-occlusal-convergence
#1
Wyeth Hoopes, Sara Cushen, Nicholas DuVall, Michael Wajdowicz, John Brewster, Howard Roberts
OBJECTIVES: To evaluate the significance of axial wall height (AWH) in molar fracture resistance involving CAD/CAM adhesively bonded, all-ceramic full coverage restorations on preparations with moderate total occlusal convergence (TOC) (16°). MATERIALS AND METHODS: 60 newly extracted maxillary third molars were divided into 5 groups (n = 12). Specimens were prepared for full-coverage, all ceramic restorations with occlusal cervical AWHs of 4, 3, 2, 1 as well as a flat preparation (0 mm AWH) with all preparations with AWH containing a moderate 16° TOC...
January 31, 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29379905/preheated-composite-resin-used-as-a-luting-agent-for-indirect-restorations-effects-on-bond-strength-and-resin-dentin-interfaces
#2
Marcelo Goulart, Barbara Borges Veleda, Deisi Damin, Glaucia Maria Bovi Ambrosano, Fabio Herrmann Coelho de Souza, Maria Carolina Guilherme Erhardt
PURPOSE: The aim of this study was to evaluate the effect of preheating composite resins used as luting agents for indirect restorations on microtensile bond strength (µTBS) and adhesive interfaces. MATERIAL AND METHODS: Fifty sound extracted third molars were used. Ten experimental groups were formed with three different luting agents: one resin cement (RelyX ARC) and two composite resins (Venus and Z250 XT). The composite resins were tested both at room temperature and when preheated to 64°C...
2018: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/29358152/how-proteolytic-inhibitors-interact-with-dentin-on-glass-fiber-post-luting-over-6-months
#3
Larissa Pinceli Chaves, Thales Lippi Ciantelli, Diana F G Araújo, Marina Ciccone Giacomini, Leo Tjäderhane, Polliana Mendes Candia Scaffa, Heitor Marques Honório, Linda Wang
OBJECTIVES: Enzyme inhibitors minimize the degradation of unprotected collagen of dentin promoted by matrix metalloproteinases (MMPs) and cysteine cathepsins (CCs). As the evidence of their effect on the root canal is limited, this study aimed to evaluate the role of EDTA, chlorhexidine and E-64 as antiproteolytic agents on the bond strength (BS) of glass-fiber posts in root canals. MATERIALS AND METHODS: Ninety-six bovine roots were distributed in groups for each time point (n = 8)...
January 11, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29326512/evaluating-the-effect-of-different-conditioning-agents-on-the-shear-bond-strength-of-resin-modified-glass-ionomers
#4
Namith Rai, Rajaram Naik, Ravi Gupta, Shobana Shetty, Amith Singh
Aim of the Study: This study aims to evaluate the effects three different conditioning agents on the shear bond strength of resin-modified glass ionomers to human dentin. Materials and Methods: One hundred and twenty recently extracted, caries-free premolars and molars will be cleaned of debris and disinfected in a 0.5% solution of sodium hypochlorite and sterile water for 30 min. The occlusal surface of each tooth will be reduced using conventional model trimmer with water to produce the dentin surface...
October 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29284956/effect-of-surface-modifications-on-the-retention-of-cement-retained-implant-crowns-under-fatigue-loads-an-in-vitro-study
#5
R Ajay, K Suma, Seyed Asharaf Ali, Jambai Sampath Kumar Sivakumar, V Rakshagan, V Devaki, K Divya
Background: Masticatory forces cause fatigue to the dental luting agents, adversely affecting the retention of these cement-retained crowns. Sandblasting (SB) and diamond abrading the abutment surface improves the bond strength of luting agents. However, the effect of acid etching (AE) on the implant abutment surface and the effect of other surface modifications under masticatory load are yet to be documented. Purpose: The aim of the study was to evaluate the effect of abutment surface modifications on the retention of cement-retained restorations subjected to cyclic fatigue loads...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29169661/light-irradiance-through-novel-cad-cam-block-materials-and-degree-of-conversion-of-composite-cements
#6
Diogo Pedrollo Lise, Annelies Van Ende, Jan De Munck, Kumiko Yoshihara, Noriyuki Nagaoka, Luiz Clovis Cardoso Vieira, Bart Van Meerbeek
OBJECTIVE: To assess light irradiance (LI) delivered by two light-curing units (LCU's) and to measure the degree of conversion (DC) of three composite cements, when cured through different thicknesses of two novel CAD-CAM block materials. METHODS: 100-μm-thick films of a dual-curable composite cement (G-CEM LinkAce, GC), a light-curable flowable resin-based composite (RBC) (G-ænial Universal Flo, GC) and a micro-hybrid RBC (G-ænial Posterior, GC) were investigated as luting agents...
November 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29143388/in-vitro-assessment-of-retention-and-resistance-failure-loads-of-teeth-restored-with-a-complete-coverage-restoration-and-different-core-materials
#7
Vasileia Tsiagali, Yvoni Kirmanidou, Argirios Pissiotis, Konstantinos Michalakis
PURPOSE: To investigate in vitro the retention and the resistance form, as well as the failure modes of maxillary premolars restored with cast metal crowns and different core materials. MATERIALS AND METHODS: Sixty human extracted maxillary premolars were selected according to their size and were embedded in PMMA resin blocks. After removing a part of their clinical crowns, the teeth were randomly divided into 3 groups of 20 teeth and were either left unrestored, or they were restored with amalgam or composite resin...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29079354/effect-of-luting-agent-on-the-load-to-failure-and-accelerated-fatigue-resistance-of-lithium-disilicate-laminate-veneers
#8
Marco M M Gresnigt, Mutlu Özcan, Marco Carvalho, Priscilla Lazari, Marco S Cune, Peywand Razavi, Pascal Magne
OBJECTIVE: The aim of this study was to investigate the influence of the luting agent on the application of laminate veneers (LVs) in an accelerated fatigue and load-to-failure test after thermo-cyclic aging. METHODS: Sound maxillary central incisors (N=40) were randomly divided into four groups to receive LVs (Li2Si2O5) that were adhesively bonded: Group CEMF: Adhesive cement (Variolink Esthetic LC), fatigue test; Group CEMLF: Adhesive cement, load-to-failure test; Group COMF: Resin composite (Enamel HFO), fatigue test; Group COMLF: Resin composite, load-to-failure test...
December 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29042724/evaluation-of-bond-strength-between-grooved-titanium-alloy-implant-abutments-and-provisional-veneering-materials-after-surface-treatment-of-the-abutments-an-in-vitro-study
#9
Gowtham Venkat, Murugesan Krishnan, Suganya Srinivasan, Muthukumar Balasubramanian
INTRODUCTION: Titanium has become the material of choice with greater applications in dental implants. The success of the dental implant does not only depend on the integration of the implant to the bone but also on the function and longevity of the superstructure. The clinical condition that demands long-term interim prosthesis is challenging owing to the decreased bond between the abutment and the veneering material. Hence, various surface treatments are done on the abutments to increase the bond strength...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28989131/comparison-of-hypersensitivity-in-metal-ceramic-crowns-cemented-with-zinc-phosphate-and-self-adhesive-resin-a-prospective-study
#10
Thatapudi Shankar, Mirna Garhnayak, Lokanath Garhnayak, Angurbala Dhal, Aswini K Kar
BACKGROUND: Luting agents used to fix artificial prostheses, such as fixed partial denture (FPD) to tooth are basically viscous in nature and show chemical reaction for fixation. Postcementation hypersensitivity is a frequent complaint of patients. The present study was conducted to compare postcementation hypersensitivity with zinc phosphate and self-adhesive resin in complete coverage crown. MATERIALS AND METHODS: This study included 30 patients in which 60 porcelein fused to metal crowns was placed...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28989124/comparison-of-shear-bond-strengths-of-conventional-resin-cement-and-self-adhesive-resin-cement-bonded-to-lithium-disilicate-an-in-vitro-study
#11
Anip K Roy, Dennis Mohan, M Sunith, Rashmi B Mandokar, S Suprasidh, Soumya Rajan
AIM: The aim of this study is to compare the shear bond strengths of conventional resin cement and self-adhesive resin cement bonded to lithium disilicate. MATERIALS AND METHODS: A total of 40 extracted human molar teeth were mounted in self-cure acrylic resin. Teeth were prepared to obtain flat occlusal surface. About 40 lithium disilicate specimens of dimension-10 mm in diameter and thickness of 2 mm-were fabricated using lost wax technique. The samples were divided into four groups: Groups I, II, III, and IV (n = 10)...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28985446/preparation-ferrule-design-effect-on-endocrown-failure-resistance
#12
Michael Einhorn, Nicholas DuVall, Michael Wajdowicz, John Brewster, Howard Roberts
PURPOSE: To evaluate the effect of preparation ferrule inclusion with fracture resistance of mandibular molar endocrowns. MATERIALS AND METHODS: Recently extracted mandibular third molars were randomly divided into 3 groups (n = 12) with the coronal tooth structure removed perpendicular to the root long axis approximately 2 mm above the cemento-enamel junction with a slow-speed diamond saw. The pulp chamber was exposed using a diamond bur in a high-speed handpiece with pulpal remnants removed and canals instrumented using endodontic hand instruments...
October 6, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28935192/effect-of-priming-agents-on-shear-bond-strengths-of-resin-based-luting-agents-to-a-translucent-zirconia-material
#13
Shogo Yagawa, Futoshi Komine, Ryosuke Fushiki, Kei Kubochi, Fumiaki Kimura, Hideo Matsumura
PURPOSE: The purpose of the present study was to evaluate the effect of priming agents and artificial aging with thermocycling on shear bond strengths of two resin-based luting agents to a translucent zirconia material. METHODS: A total of 308 pairs of translucent zirconia disk specimens were divided into seven treatment groups: Alloy Primer (ALP), Clearfil Ceramic Primer Plus (CCP), Meta Fast Bonding Liner (MFB), MR. bond (MRB), Super-Bond PZ Primer Liquid B (PZB), V-Primer (VPR), and an unprimed group (UP)...
September 18, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28932151/influence-of-irrigating-agents-on-fiber-postpush-out-bond-strength-to-radicular-dentin-sections-with-the-different-adhesive-system
#14
Satheesh B Haralur, Asim Nasser A Alasabi, Sultan A Abohathrah Al Qahtani, Saeed Musleh S Alqahtani
OBJECTIVE: The objective of this study is to evaluate the effect of irrigating agents on push-out bond strength of resin postcemented with various adhesive systems at different radicular dentin sections. MATERIALS AND METHODS: Sixty single-rooted premolar teeth were root canal treated, subsequently decorated at cementoenamel junction. The endodontic postspace was irrigated with 5.25% sodium hypochlorite (NaOCl) and 17% ethylenediaminetetraacetic acid (EDTA) for Group A (n = 30) and Group B (n = 30), respectively...
July 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28927922/retrospective-clinical-evaluation-of-ceramic-onlays-placed-by-dental-students
#15
Jennifer J Archibald, Gildo Coelho Santos, Maria Jacinta Moraes Coelho Santos
STATEMENT OF PROBLEM: Indirect restorations with partial or complete occlusal surface coverage have been recommended to restore teeth with weakened walls in order to prevent cusp fracture. The success of these restorations when performed by dental students is unknown. PURPOSE: The purpose of this retrospective study was to evaluate the clinical performance of adhesively bonded ceramic onlay restorations placed by third- and fourth-year dental students. MATERIAL AND METHODS: Sixty-five ceramic onlays were placed in patients between 2009 and 2015...
September 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28916464/adhesion-procedure-for-cad-cam-resin-crown-bonding-reduction-of-bond-strengths-due-to-artificial-saliva-contamination
#16
Asuka Kawaguchi-Uemura, Atsushi Mine, Mariko Matsumoto, Yuko Tajiri, Mami Higashi, Tomoshige Kabetani, Ryosuke Hagino, Dai Imai, Takuya Minamino, Jiro Miura, Hirofumi Yatani
PURPOSE: The present study aimed to elucidate how saliva contamination affects microtensile bond strength of resin cement to CAD/CAM resin blocks and identify a decontamination method that can restore original bond strength. METHODS: The KATANA AVENCIA block (Kuraray Noritake Dental) was sandblasted on the adherend surface (P-Co group). Then, the block was contaminated with artificial saliva (Saliveht Aerosol, Teijin). Air dry (N-Co), sandblasting (Sb) and phosphate acid cleaning (AT) groups were prepared...
September 12, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28890610/evaluation-of-novel-glass-fiber-reinforced-composite-technique-for-primary-anterior-teeth-with-deep-carious-lesions-a-12-month-clinical-study
#17
Ajinkya Sawant, Yusuf Chunawalla, Abdul Morawala, Nupur S Kanchan, Kapil Jain, Rohan Talathi
BACKGROUND: Early childhood caries discloses a distinct clinical pattern, and the teeth most often involved are the maxillary central incisors, lateral incisors, and the maxillary and man-dibular first molars. The maxillary incisors are most severely affected, with deep carious lesions usually involving the pulp. Teeth that have been endodontically treated often have little coronal tooth tissue remaining and as such require a post to retain the core and restoration .This study evaluated and compared the efficacy of EverStick glass fiber-reinforced composite post with ParaPost Taper Lux in primary maxillary anterior teeth...
April 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28869365/influence-of-different-ceramic-systems-on-marginal-misfit
#18
S P Vargas, A C C Neves, R Vitti, M Amaral, M N Henrique, L R Silva-Concílio
OBJECTIVE: the aim of this study was to evaluate the marginal misfit at the interface between a ceramic coping and its abutment. METHODS: Twenty-four specimens were made with solid abutments. The specimens were divided into 3 groups according to the ceramic system (n = 8): Lava (zirconia), IPS e.max Press (lithium disilicate), and IPS Empress Esthetic (leucite). All copings were cemented with resin luting agent (RelyX U200) and the marginal misfit were evaluated at 3 different times: initial, after cementation, and after mechanical cycling using a linear measuring microscope (Measuring Microscope STM-Olympus) at a magnification of 40x...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28816187/comparison-of-film-thickness-of-two-commercial-brands-of-glass-lonomer-cement-and-one-dual-cured-composite-an-in-vitro-study
#19
Rajat R Khajuria, Rishav Singh, Pranamee Barua, Nausheen Hajira, Naveen Gupta, Rohit R Thakkar
AIM: The present study is undertaken to examine the film thickness of three most commonly used luting cements and to determine their usage as a luting agent. MATERIALS AND METHODS: This study was carried out strictly according to the guidelines of American Dental Association (ADS) specification no. 8. Two glass slabs of 5 cm in length and 2 cm in width were used. One glass slab was kept over the other glass slab and the space between the two glass slabs was measured using metallurgical microscope at the power of 10*...
August 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28806426/comparative-evaluation-of-the-effect-of-laser-etching-on-the-shear-bond-strength-of-crowns-cemented-with-two-different-luting-agents-an-in-vitro-study
#20
Ankur Dahiya, Paresh Gandhi, Nadim Z Baba
PURPOSE: The aim of this study was to compare the shear bond strength of crowns cemented on natural teeth after surface treatment of the enamel with an erbium-doped yttrium aluminum garnet (Er:YAG) laser. MATERIALS AND METHODS: Crown preparation was done for 40 full-metal crowns, and wax patterns with loops were cast in a cobalt-chromium alloy. The Er:YAG laser was used for surface treatment of some teeth, and teeth without surface treatment acted as the control...
September 2017: International Journal of Prosthodontics
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