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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
#1
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/28929203/effects-of-toothpastes-on-white-spot-lesions-around-orthodontic-brackets-using-quantitative-light-induced-fluorescence-qlf-an-in-vitro-study
#2
Gokcenur Gokce, Selcuk Savas, Ebru Kucukyilmaz, Ilknur Veli
AIM: The aim of this study was to investigate the effects of toothpastes with different contents on the remineralization of white spot lesions around orthodontic brackets by quantitative light-induced fluorescence (QLF). MATERIALS AND METHODS: A total of 45 freshly extracted human mandibular first molars were selected. Artificial caries lesions were created on enamel surfaces using an acidified gel system for 7 days. Initial relative fluorescence loss was calculated as the pretreatment (baseline) fluorescence value by QLF device...
September 19, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28927922/retrospective-clinical-evaluation-of-ceramic-onlays-placed-by-dental-students
#3
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/28927920/the-combination-prosthesis-a-digitally-designed-retrievable-cement-and-screw-retained-implant-supported-prosthesis
#4
Periklis Proussaefs, Abdulaziz AlHelal
The technique described offers a digital workflow for designing and fabricating a combination cement- and screw-retained implant-supported prosthesis. After making the definitive impression and definitive stone cast, the definitive combination prosthesis is digitally designed. Custom-milled titanium abutments and cementable superstructure prosthesis are designed and milled by having occlusal access channels of the prosthesis correspond to the occlusal access channels of the custom abutments. After intraorally confirming the esthetics, occlusion, and fit, the prosthesis is cemented intraorally and removed as a screw-retained prosthesis...
September 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28923548/survival-of-extensively-damaged-endodontically-treated-incisors-restored-with-different-types-of-posts-and-core-foundation-restoration-material
#5
Priscilla Cardoso Lazari, Marco Aurélio de Carvalho, Altair A Del Bel Cury, Pascal Magne
STATEMENT OF PROBLEM: Which post-and-core combination will best improve the performance of extensively damaged endodontically treated incisors without a ferrule is still unclear. PURPOSE: The purpose of this in vitro study was to investigate the restoration of extensively damaged endodontically treated incisors without a ferrule using glass-ceramic crowns bonded to various composite resin foundation restorations and 2 types of posts. MATERIAL AND METHODS: Sixty decoronated endodontically treated bovine incisors without a ferrule were divided into 4 groups and restored with various post-and-core foundation restorations...
September 16, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28917087/evaluation-of-four-different-restorative-materials-for-restoration-of-the-periodontal-condition-of-wedge-shaped-defect-a-comparative-study
#6
Jian-Yong Ruan, Zheng-Lin Gong, Rui-Zhi Zhang, Zhe Zhang, Ran Xu, Da-Xu Li, Le Ren, Hong Tao
BACKGROUND This study aimed to conduct a clinical evaluation of four restorative materials for restoration of dental wedge-shaped defect (WSD) and their impacts on periodontal tissues. MATERIAL AND METHODS A total of 280 maxillary premolars with dental WSD were selected from 106 patients; the patient cases were divided into eight groups according to different combinations of restorative materials (flowable resin composites, Dyract compomers, glass ionomer cement (GIC), light-curing composite resin), and WSD positions (approaching gingival and subgingival positions)...
September 16, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28916464/adhesion-procedure-for-cad-cam-resin-crown-bonding-reduction-of-bond-strengths-due-to-artificial-saliva-contamination
#7
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/28913890/interfacial-fracture-toughness-of-adhesive-resin-cement-lithium-disilicate-resin-composite-blocks
#8
Samer Mesmar, N Dorin Ruse
PURPOSE: Resin composite blocks (RCB) are advocated as alternative to ceramic blocks (CB). Prior to use, adherence to these materials should characterized. This study aimed to test the null hypothesis (H0 ) that material and surface treatment combinations do not influence interfacial fracture toughness (KIC ) of a self-cured adhesive resin cement [RelyX Ultimate (RXU)] to RCB or CB, under nonaged and aged conditions. MATERIALS AND METHODS: Two RCB, Lava Ultimate (LU) and Enamic (EN), and one CB, IPS e...
September 15, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28902242/polymerization-shrinkage-stress-of-composite-resins-and-resin-cements-what-do-we-need-to-know
#9
Carlos José Soares, André Luis Faria-E-Silva, Monise de Paula Rodrigues, Andomar Bruno Fernandes Vilela, Carmem Silvia Pfeifer, Daranee Tantbirojn, Antheunis Versluis
Polymerization shrinkage stress of resin-based materials have been related to several unwanted clinical consequences, such as enamel crack propagation, cusp deflection, marginal and internal gaps, and decreased bond strength. Despite the absence of strong evidence relating polymerization shrinkage to secondary caries or fracture of posterior teeth, shrinkage stress has been associated with post-operative sensitivity and marginal stain. The latter is often erroneously used as a criterion for replacement of composite restorations...
August 28, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28891534/effect-of-irradiation-on-the-shear-bond-strength-of-self-adhesive-luting-cement-in-different-preparation-depths
#10
O Sahin, D Ö Dede, A Köroğlu, Y Özgüven, D Ö Doğan
OBJECTIVE: The purpose of this study was to evaluate the effects of pre- and post-irradiation application on the shear bond strength of self-adhesive luting cements to dentin and enamel. MATERIALS AND METHODS: Thirty-two extracted human maxillary incisor teeth were used in this study. Teeth were divided into two main groups according to preparation depth (0.5 mm and 1 mm) as Group E and Group D and were divided into four subgroups according to treatment protocol (n = 12)...
August 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28886951/strength-comparison-of-anterior-teeth-restored-with-ceramic-endocrowns-vs-custom-made-post-and-cores
#11
Beata Dejak, Andrzej Młotkowski
PURPOSE: The aim of the study was to compare strength of the anterior teeth restored with ceramic endocrowns versus custom-made post and core. METHODS: The investigation used the finite element analysis. Three 3-D models of maxillary central incisor were created: model A-tooth restored with metal post and core with ceramic crown; model B-tooth with leucite ceramic endocrown; model C-tooth with lithium disilicate ceramic endocrown. Each model was subjected to a 100N force applied at a distance of 5mm from the incisal edge, at the angle of 130° to the long axis of the tooth...
September 5, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28886770/dental-cements-for-luting-and-bonding-restorations-self-adhesive-resin-cements
#12
REVIEW
Adriana P Manso, Ricardo M Carvalho
Self-adhesive resin cements combine easy application of conventional luting materials with improved mechanical properties and bonding capability of resin cements. The presence of functional acidic monomers, dual cure setting mechanism, and fillers capable of neutralizing the initial low pH of the cement are essential elements of the material and should be understood when selecting the ideal luting material for each clinical situation. This article addresses the most relevant aspects of self-adhesive resin cements and their potential impact on clinical performance...
October 2017: Dental Clinics of North America
https://www.readbyqxmd.com/read/28876966/the-effect-of-resin-bonding-on-long-term-success-of-high-strength-ceramics
#13
M B Blatz, M Vonderheide, J Conejo
Digital manufacturing, all-ceramics, and adhesive dentistry are currently the trendiest topics in clinical restorative dentistry. Tooth- and implant-supported fixed restorations from computer-aided design (CAD)/computer-aided manufacturing (CAM)-fabricated high-strength ceramics-namely, alumina and zirconia-are widely accepted as reliable alternatives to traditional metal-ceramic restorations. Most recent developments have focused on high-translucent monolithic full-contour zirconia restorations, which have become extremely popular in a short period of time, due to physical strength, CAD/CAM fabrication, and low cost...
September 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28874990/in-vitro-study-of-the-fracture-resistance-of-monolithic-lithium-disilicate-monolithic-zirconia-and-lithium-disilicate-pressed-on-zirconia-for-three-unit-fixed-dental-prostheses
#14
Jae-Won Choi, So-Yeun Kim, Ji-Hyeon Bae, Eun-Bin Bae, Jung-Bo Huh
PURPOSE: The purpose of this study was to determine fracture resistance and failure modes of three-unit fixed dental prostheses (FDPs) made of lithium disilicate pressed on zirconia (LZ), monolithic lithium disilicate (ML), and monolithic zirconia (MZ). MATERIALS AND METHODS: Co-Cr alloy three-unit metal FDPs model with maxillary first premolar and first molar abutments was fabricated. Three different FDPs groups, LZ, ML, and MZ, were prepared (n = 5 per group)...
August 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28872994/comparison-of-cytotoxicity-of-new-nanohybrid-composite-giomer-glass-ionomer-and-silver-reinforced-glass-ionomer-using-human-gingival-fibroblast-cell-line
#15
Fatemeh Koohpeima, Mohammad Javad Mokhtari, Maryam Doozandeh, Zahra Jowkar, Fatemeh Yazdanshenas
AIM: The objective of this study was to investigate the cytotoxic effects of new nanohybrid composite, giomer, conventional and resin modified and silver reinforced glass ionomer cements and compare the biocompatibility of these dental materials in cell culture. STUDY DESIGN: Five cylindrical specimens were made of each material, using a mold (2mm. thick and 5 mm in diameter). For HGF, cells were cultured in RPMI-1640 medium. After attaining 80% confluence, cells were treated with different doses of five tested materials for 24h...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28872726/bond-strength-of-resin-cement-and-glass-ionomer-to-nd-yag-laser-treated-zirconia-ceramics
#16
Nafiseh Asadzadeh, Foojan Ghorbanian, Farzaneh Ahrary, Hamidreza Rajati Haghi, Reza Karamad, Amir Yari, Abdollah Javan
PURPOSE: To investigate the effect of neodymium-doped yttrium aluminum garnet (Nd:YAG) laser irradiation on the surface properties and bond strength of zirconia ceramics. MATERIALS AND METHODS: Forty-eight zirconia ceramic pieces (4 × 4 × 1 mm(3) ) were divided into four groups according to surface treatment as follows: two control groups (no treatment) for resin bonding (CRC) and glass ionomer (GI) bonding (CGC); two laser treatment groups (Nd:YAG irradiation, 3 W, 200 MJ, 10 Hz, 180 μs) for resin bonding (LRC) and GI bonding (LGC)...
September 5, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28869365/influence-of-different-ceramic-systems-on-marginal-misfit
#17
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/28863911/quantitative-analysis-of-enamel-on-debonded-orthodontic-brackets
#18
Nathan J Cochrane, Thomas W G Lo, Geoffrey G Adams, Paul M Schneider
INTRODUCTION: Iatrogenic damage to the tooth surface in the form of enamel tearouts can occur during removal of fixed orthodontic appliances. The aim of this study was to assess debonded metal and ceramic brackets attached with a variety of bonding materials to determine how frequently this type of damage occurs. METHODS: Eighty-one patients close to finishing fixed orthodontic treatment were recruited. They had metal brackets bonded with composite resin and a 2-step etch-and-bond technique or ceramic brackets bonded with composite resin and a 2-step etch-and- bond technique, and composite resin with a self-etching primer or resin-modified glass ionomer cement...
September 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28862597/influence-of-custom-adaptation-on-the-characteristics-of-fiber-posts
#19
Ana Regina Cervantes Dias, Marcos Oliveira Barceleiro, Katia Regina Hostílio Cervantes Dias, Mauro Sayão de Miranda
In this in vitro study, 3 experiments were conducted to evaluate the influence of customizing the apical portion on the characteristics of fiber posts. In the first experiment, 4 fiber posts were submitted to different custom adaptations (no customization, industrial shaping tool, diamond bur, or paper disc) and were observed with a scanning electron microscope to evaluate the micromorphologic changes. In the second experiment, 60 posts of different sizes were divided into 6 groups (n = 10): 0 (No. 0.5), 1 (No...
September 2017: General Dentistry
https://www.readbyqxmd.com/read/28862589/review-of-techniques-for-the-intact-removal-of-a-permanently-cemented-restoration
#20
Salwa Omar Bajunaid
The safest and least traumatic means of removing a cemented restoration is to cut a slot and pry the crown or retainer loose, sacrificing the restoration. However, various techniques and instruments for intact removal of permanently cemented cast restorations have been described in the literature. This literature review explores conservative and semiconservative techniques that are useful for preserving permanently cemented restorations during removal. Richwil resin, ultrasonic energy, and crown tractors can be considered preferred methods for removal of temporarily cemented restorations...
September 2017: General Dentistry
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