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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
#1
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/29128128/cad-fe-modeling-and-analysis-of-class-ii-restorations-incorporating-resin-composite-glass-ionomer-and-glass-ceramic-materials
#2
Pietro Ausiello, Stefano Ciaramella, Massimo Martorelli, Antonio Lanzotti, Antonio Gloria, David C Watts
OBJECTIVES: To investigate the influence of specific resin-composite, glass ceramic and glass ionomer cement (GIC) material combinations in a "multi-layer" technique to replace enamel and dentin in class II mesio-occlusal-distal (MOD) dental restorations using 3D-Finite Element Analysis (FEA). METHODS: Four 3D-FE models (A-D) of teeth, adhesively restored with different filling materials, were created and analyzed in comparison with a 3D model (E) of a sound lower molar...
November 8, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29122072/inhibition-of-residual-cariogenic-bacteria-in-atraumatic-restorative-treatment-by-chlorhexidine-disinfection-or-incorporation
#3
Jooie S Joshi, Noor M Roshan, Basha Sakeenabi, P Poornima, N B Nagaveni, V V Subbareddy
PURPOSE: The purpose of this study was to compare the efficacy of chlorhexidine (CHX) cavity disinfection and of CHX containing glass ionomer cement (GIC) in inhibiting residual cariogenic bacteria. METHODS: Ninety, five- to nine-year-olds were randomly allocated to three groups: Group 1-CHX containing GIC; Group 2-CHX cavity disinfection; and Group 3-conventional GIC. Total viable count (TVC), Streptococcus mutans (SM), and Lactobacillus (LB) were analyzed pre-, post-, and three months after atraumatic restorative treatment (ART)...
July 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/29111130/effect-of-sandblasting-and-enamel-deproteinization-on-shear-bond-strength-of-resin-modified-glass-ionomer
#4
Nadine Hamdane, Roland Kmeid, Elie Khoury, Joseph Ghoubril
INTRODUCTION: The purpose of this study was to compare, in vitro, the shear bond strength of resin-modified glass ionomer (RMGI) bonded to an enamel surface prepared by either sandblasting with 50μm of aluminium oxide particles, deproteinization with 5.25% NaOCl, or by combining both techniques. MATERIAL AND METHODS: One hundred and fifty human premolars were cleaned and randomly divided into five groups. In group 1, the teeth were etched using 37% phosphoric acid and bonded with Transbond XT...
October 27, 2017: International Orthodontics
https://www.readbyqxmd.com/read/29110340/effect-of-topical-fluoride-application-on-enamel-after-in-office-bleaching-as-evaluated-using-a-novel-hardness-tester-and-a-transverse-microradiography-method
#5
Mai Fukuyama, Chiharu Kawamoto, Pipop Saikaew, Yasuhiro Matsuda, Ricardo M Carvalho, Denis Selimovic, Hidehiko Sano
This study evaluated the effect of topical fluoride application on enamel hardness after in-office bleaching. Twelve human incisors were cut along the long axis, resulting in 24 halves used in four treatment groups (n = 6 in each group): (i) untreated group (C); (ii) in-office bleaching material (B); (iii) treatment with surface reaction-type prereacted glass-ionomer varnish after in-office bleaching (B+PRG); and (iv) treatment with acidulated phosphate fluoride solution after bleaching (B+F). All specimens were subjected to pH-cycling for 4 wk...
November 7, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29109750/microbial-microleakage-assessment-of-class-v-cavities-restored-with-different-materials-and-techniques-a-laboratory-study
#6
Hossein Nematollahi, Ali Bagherian, Kiarash Ghazvini, Habibollah Esmaily, Mina Azadegan Mehr
Background: The aim of this study was to compare microbial microleakage of class V cavities restored with different materials and techniques using a microbial leakage assessment method. Materials and Methods: One hundred extracted, caries-free, human maxillary premolars were randomly divided into five groups. Group 1: Resin-modified glass ionomer (RMGI), Group 2: Closed sandwich with flowable composite + nanohybrid composite, Group 3: Nanohybrid composite, Group 4: Closed sandwich with RMGI + nanohybrid composite, and Group 5: Flowable composite + nanohybrid composite that were co-cured together ("snow-plow" technique)...
September 2017: Dental Research Journal
https://www.readbyqxmd.com/read/29109749/push-out-bond-strength-of-different-intracanal-posts-in-the-anterior-primary-teeth-according-to-root-canal-filling-materials
#7
Nilgoon Pasdar, Bahman Seraj, Mostafa Fatemi, Shirin Taravati
Background: This study was carried out to evaluate the effect of root canal filling on the bond strength of three intracanal posts in the primary incisors. Materials and Methods: Sixty primary incisors were prepared and then divided into two groups (n = 30). The first group canals obturated with zinc oxide eugenol (ZOE) and Group 2 canals obturated with Metapex. Further, the two group categories were divided into three subgroups (n = 10): (1) short composite post (SCP), (2) glass fiber posts (GFPs) cemented with flowable composite, and (3) GFP with glass ionomer cement (GFP + GIC)...
September 2017: Dental Research Journal
https://www.readbyqxmd.com/read/29109747/effect-of-finishing-polishing-techniques-and-time-on-surface-roughness-of-esthetic-restorative-materials
#8
Prashanthi Sampath Madhyastha, Shreya Hegde, N Srikant, Ravindra Kotian, Srividhya Sriraman Iyer
Background: Surface roughness associated with improper finishing/polishing of restorations can result in plaque accumulation, gingival irritation, surface staining, and poor esthetic of restored teeth. The study aimed to evaluate the efficiency of various finishing and polishing systems and time using various procedures on surface roughness of some esthetic restorative materials. Materials and Methods: In this in vitro study, samples of two composite materials, compomer and glass ionomer cement (GIC) materials, were fabricated...
September 2017: Dental Research Journal
https://www.readbyqxmd.com/read/29109319/histological-evaluation-of-the-effect-of-platelet-rich-plasma-on-pulp-regeneration-in-nonvital-open-apex-teeth-an-animal-study
#9
Jamileh Ghoddusi, Amir Maghsudlu, Hamid Jafarzadeh, Amirhossein Jafarian, Maryam Forghani
AIM: Platelet-rich plasma (PRP), which is a concentration of growth factors found in platelets, may be a suitable material for pulp regeneration. The aim of this animal study was a histological evaluation of PRP on pulp regeneration in nonvital teeth with immature apices. MATERIALS AND METHODS: A total of 40 premolar dogs' teeth were chosen for this study. After general anesthesia, the teeth were exposed, and subsequently, pulps were removed and the cavities were opened to the oral cavity...
November 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29106299/comparison-of-two-early-treatment-protocols-for-anterior-dental-crossbite-in-the-mixed-dentition-a-randomized-trial
#10
Cristina B Miamoto, Leandro S Marques, Lucas G Abreu, Saul M Paiva
OBJECTIVE: To evaluate and compare two treatment protocols to correct anterior dental crossbite in the mixed dentition. MATERIALS AND METHODS: Thirty children, 8-10 years of age, participated. Individuals were divided into two groups. Group 1 consisted of 15 children treated with an upper removable appliance with finger springs; group 2, 15 children treated by bonding resin-reinforced glass ionomer cement bite pads on the lower first molars. The 30 participants were evaluated before treatment (T1) and 12 months after treatment began (T2)...
November 6, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29104387/evaluation-of-antimicrobial-efficacy-of-various-intracanal-medicaments-in-primary-teeth-an-in-vivo-study
#11
Brahmananda Dutta, Kanika S Dhull, Debasmita Das, P V Samir, Rajnish K Verma, Nipa Singh
Introduction: Bacteria and their products play a primary etiological role in the initiation and perpetuation of pulpoperiapical pathosis. Intracanal medication is important for endodontic success as it eliminates microorganisms that persist after chemomechanical preparation. Aim: To compare antimicrobial efficacy of calcium hydroxide powder, triple antibiotic paste, calcium hydroxide with 2% chlorhexidine solution, and triple antibiotic paste with 2% chlorhexidine solution...
July 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29102159/effect-of-ionizing-radiation-on-properties-of-restorative-materials
#12
Suzane Boa Nova Brandeburski, Alvaro Della Bona
OBJECTIVE: To evaluate the effect of ionizing radiation from high energy X-ray on properties of restorative materials. METHODS: Study materials (3M-ESPE) were: Z250-microhybrid resin-based composite (Filtek Z-250); Z350-nanofilled resin-based composite (Filtek Z-350XT); VIT-resin-modified glass ionomer cement (Vitremer); and KME-conventional glass ionomer cement (Ketac Molar Easymix). Sixty bar-shaped and cylinder-shaped specimens were fabricated from each material...
October 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29091110/evaluation-in-vivo-of-biocompatibility-of-differents-resin-modified-cements-for-bonding-orthodontic-bands
#13
Janaina A Mesquita, Rogério Lacerda-Santos, Gêisa A M Sampaio, Gustavo P Godoy, Cassiano F W Nonaka, Pollianna M Alves
The focus of this study was to test the hypothesis that there would be no difference between the biocompatibility of resin-modified glass ionomer cements. Sixty male Wistar rats were selected and divided into four groups: Control Group; Crosslink Group; RMO Group and Transbond Group. The materials were inserted into rat subcutaneous tissue. After time intervals of 7, 15 and 30 days morphological analyses were performed. The histological parameters assessed were: inflammatory infiltrate intensity; reaction of multinucleated giant cells; edema; necrosis; granulation reaction; young fibroblasts and collagenization...
October 26, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29090511/fracture-behavior-marginal-gap-width-and-marginal-quality-of-vented-or-pre-cemented-cad-cam-all-ceramic-crowns-luted-on-y-tzp-implants
#14
Lucia K Zaugg, Simon Meyer, Nadja Rohr, Isabella Zehnder, Nicola U Zitzmann
OBJECTIVES: To investigate the fracture behavior and marginal gap region of CAD/CAM fabricated lithium disilicate (L) and zirconium dioxide (Z) crowns using palatal venting (PV), pre-cementation with custom analogs (CA), or conventional cementation technique (SP) with adhesive cement (A) or resin-modified glass ionomer cement (B). MATERIAL AND METHODS: Twelve groups (n = 6) were set according to material (L, Z), cement (A, B), and technique (PV, CA, SP). Specimens were thermo-mechanical aged (TML), loaded until fracture (LF) and fracture patterns recorded...
October 31, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29084299/effects-of-cement-abutment-surface-pretreatment-and-artificial-aging-on-the-force-required-to-detach-cantilever-fixed-dental-prostheses-from-dental-implants
#15
Stefanie Kappel, Taras Chepura, Marc Schmitter, Peter Rammelsberg, Stefan Rues
PURPOSE: To examine the in vitro effects of different cements, abutment surface preconditioning, and artificial aging on the maximum tensile force needed to detach cantilever fixed dental prostheses (FDPs) from dental implants with titanium abutments. MATERIALS AND METHODS: A total of 32 tissue-level implants were combined with standardized titanium abutments. For each test group, eight cantilever FDPs were fabricated using selective laser melting (cobalt-chromium [CoCr] alloy)...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29076713/comparative-evaluation-of-micro-leakage-of-two-newer-glass-ionomer-cements-in-primary-molars-immersed-in-three-beverages-in-vitro-study
#16
P Balgi, F Katge, D Pradhan, S Shetty, B Rusawat, S Pol
Introduction: The dietary habits of children expose the oral cavity to challenging environments. A durable interface between the restorative material and tooth surface is essential to ensure marginal integrity thereby contributing to the longevity of restoration. Objectives: The objective of this study was to compare the micro-leakage of two newer glass ionomer cements (SDI Riva Self Cure GIC and GC Fuji IX GP EXTRA) in primary molars immersed in sugarcane juice, chocolate milk and mango drink...
September 30, 2017: Ceylon Medical Journal
https://www.readbyqxmd.com/read/29075408/evaluation-of-the-effect-of-home-bleaching-agents-on-surface-microhardness-of-different-glass-ionomer-cements-containing-hydroxyapatite
#17
Farahnaz Sharafeddin, Mahsa Kowkabi, Soodabe Shoale
BACKGROUND: Home bleaching agents may exert some negative effects on surface hardness of restorative materials such as glass-ionomer cements (GICs). Since some studies have shown that some components such as hydroxyapatite (HA), as a bioactive glass, can improve the mechanical properties of dental materials, the effect of bleaching agents on surface hardness of GICs containing hydroxyapatite is questionable. This study was designed to evaluate the effect of home bleaching agents on the surface hardness of two different commercially available GICs containing hydroxyapatite...
September 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29071026/in-vitro-effect-of-bleaching-with-810-nm-and-980-nm-diode-laser-on-microhardness-of-self-cure-and-light-cure-glass-ionomer-cements
#18
Ladan Ranjbar Omrani, Sara Khoshamad, Elham Tabatabaei Ghomshe, Nasim Chiniforush, Sedighe Sadat Hashemi Kamangar
Introduction: This study sought to assess the effect of bleaching combined with irradiation of 810 nm and 980 nm diode laser on microhardness of 2 commonly used self-cure and light-cure glass ionomer cements (GICs) in comparison with conventional bleaching (without laser). Methods: In this in vitro, experimental study, 60 samples were fabricated of A2 shade of Fuji IX and Fuji II LC GICs (n=30) and each group was divided into 3 subgroups (n=10). The first subgroups were subjected to bleaching with Opalescence Xtra Boost plus 980 nm diode laser irradiation...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29070158/partial-pulpotomy-in-immature-permanent-molars-after-carious-exposures-using-different-hemorrhage-control-and-capping-materials
#19
Beste Özgür, Serdar Uysal, H Cem Güngör
PURPOSE: This study compared the outcome of partial pulpotomies with mineral trioxide aggregate (MTA) or calcium hydroxide (CH) following hemorrhage control with 2.5 percent sodium hypochlorite (SH) or 0.9 percent sterile saline (SS) solutions in cariously exposed immature permanent molars. METHODS: Following removal of two to three mm of the pulp at the exposure site, 80 Class I cavities were randomly allocated to four groups according to the hemorrhage control agent and pulp-capping material used: (1) group one-SH plus MTA; (2) group two-SS plus MTA; (3) group three-SH plus CH; (4) group four-SS plus CH...
September 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/29069152/in-vitro-and-in-vivo-evaluations-of-glass-ionomer-cement-containing-chlorhexidine-for-atraumatic-restorative-treatment
#20
Cristiane Duque, Kelly Limi Aida, Jesse Augusto Pereira, Gláucia Schuindt Teixeira, Angela Scarparo Caldo-Teixeira, Luciana Rodrigues Perrone, Karina Sampaio Caiaffa, Thais de Cássia Negrini, Aline Rogéria Freire de Castilho, Carlos Alberto de Souza Costa
OBJECTIVES: Addition of chlorhexidine has enhanced the antimicrobial effect of glass ionomer cement (GIC) indicated to Atraumatic Restorative Treatment (ART); however, the impact of this mixture on the properties of these materials and on the longevity of restorations must be investigated. The aim of this study was to evaluate the effects of incorporating chlorhexidine (CHX) in the in vitro biological and chemical-mechanical properties of GIC and in vivo clinical/ microbiological follow-up of the ART with GIC containing or not CHX...
September 2017: Journal of Applied Oral Science: Revista FOB
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