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Microleakage

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https://www.readbyqxmd.com/read/29236177/effect-of-er-yag-laser-enamel-conditioning-and-moisture-on-the-microleakage-of-a-hydrophilic-sealant
#1
Zeynep Aslı Güçlü, Andrew Paul Hurt, Nazmiye Dönmez, Nichola Jayne Coleman
For a given sealant, successful pit and fissure sealing is principally governed by the enamel conditioning technique and the presence of moisture contamination. A new generation of hydrophilic resin sealants is reported to tolerate moisture. This study investigates the impact of Er:YAG laser pre-conditioning and moisture contamination on the microleakage of a recent hydrophilic sealant. Occlusal surfaces of extracted human molars were either acid etched (n = 30), or successively lased and acid etched (n = 30)...
December 13, 2017: Odontology
https://www.readbyqxmd.com/read/29225648/evaluating-the-accuracy-of-two-microleakage-assessment-methods-for-mineral-trioxide-aggregate-and-calcium-enriched-mixture-cement
#2
Fatemeh Ayatollahi, Milad Hazeri Baqdad Abad, Seyed Hossein Razavi, Mahdi Tabrizizadeh, Reza Ayatollahi, Fatemeh Zarebidoki
Introduction: Multiple methods for evaluating microleakage have been introduced over the years, but there has been no agreement as to which technique will give more accurate results. The aim of this study was to compare the accuracy and results of fluid filtration and marginal adaptation methods for mineral trioxide aggregate (MTA) and calcium-enriched mixture (CEM) cement apical plugs. Methods and Materials: A total of 250 single-rooted human teeth were collected...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29211287/comparative-study-between-laser-and-conventional-techniques-for-class-v-cavity-preparation-in-gamma-irradiated-teeth-in-vitro-study
#3
Amr H M Rasmy, Tarek A Harhash, Rami M S Ghali, Eman M F El Maghraby, Dalia H El Rouby
OBJECTIVE: The purpose of this study was to compare laser with conventional techniques in class V cavity preparation in gamma-irradiated teeth. METHODS: Forty extracted human teeth with no carious lesions were used for this study and were divided into two main groups: Group I (n = 20) was not subjected to gamma radiation (control) and Group II (n=20) was subjected to gamma radiation of 60 Gray. Standard class V preparation was performed in buccal and lingual sides of each tooth in both groups...
November 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29194924/microleakage-around-zirconia-crown-margins-after-ultrasonic-scaling-with-self-adhesive-resin-or-resin-modified-glass-ionomer-cement
#4
Bright Chang, Ronald Goldstein, Chee Paul Lin, Sudha Byreddy, Nathaniel C Lawson
OBJECTIVES: To measure microleakage around zirconia crown margins cemented with self-adhesive resin or resin modified glass ionomer (RMGI) cement after ultrasonic scaling. METHODS: 16 molars were prepared for crowns (margin 0.5 mm coronal of cementum-enamel junction). Preparations were digitally scanned and zirconia crowns milled. Specimens were divided into two groups (n = 8): self-adhesive resin (RelyX Unicem 2) or resin modified glass ionomer (RMGI) (RelyX Luting Plus) cements...
December 1, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29184833/comparison-of-coronal-leakage-in-tooth-preparation-with-two-single-file-systems-and-three-obturation-techniques
#5
Eshaghali Saberi, Shahram Shahraki Zahedani, Sediqe Ebrahimipour, Neda Valian
Aims and Objectives: Root canal preparation and obturation are of great importance in endodontics. Its purpose is to eliminate pulpal and periradicular disease. The aim of this study was to compare coronal bacterial microleakage in prepared root canals using Neoniti A1 and Reciproc files that obturated with lateral compaction, single cone gutta-percha, and hybrid (tapered cone/lateral compaction) methods. Materials and Methods: In this ex vivo study, a total of 110 single-rooted mandibular first premolars were choose and randomly divided into two study groups A and B (each 45) that one group was prepared with Reciproc and another with Neoniti A1 and negative and positive control groups (each 10)...
October 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29178733/the-role-of-adhesive-materials-and-oral-biofilm-in-the-failure-of-adhesive-resin-restorations
#6
REVIEW
Roberto Pinna, Paolo Usai, Enrica Filigheddu, Franklin Garcia-Godoy, Egle Milia
PURPOSE: To critically discuss adhesive materials and oral cariogenic biofilm in terms of their potential relevance to the failures of adhesive restorations in the oral environment. METHODS: The literature regarding adhesive restoration failures was reviewed with particular emphasis on the chemistry of adhesive resins, weakness in dentin bonding, water fluids, cariogenic oral biofilm and the relations that influence failures. Particular attention was paid to evidence derived from clinical studies...
October 2017: American Journal of Dentistry
https://www.readbyqxmd.com/read/29167706/the-effect-of-oxalate-based-desensitizers-on-the-microleakage-and-shear-bond-strength-of-resin-modified-glass-ionomer
#7
Maryam Firouzmandi, Fereshteh Valipour, Maryam Roshanzamir, Tayebeh Mobaleghi
Background: The first line of intervention to alleviate tooth sensitivity is to use dentin desensitizers such as oxalate-based desensitizers. When the dentin sensitivity continues even after application of desensitizers the next intervention would be restoration of the lesion. The aim of this in vitro study was to investigate the effect of prior application of oxalate-based desensitizer on the marginal microleakage and shear bond strength of resin modified glass ionomer (RMGI) restorations...
October 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29167683/microleakage-of-two-bulk-fill-and-one-conventional-composite-in-class-ii-restorations-of-primary-posterior-teeth
#8
Shahram Mosharrafian, Alireza Heidari, Pegah Rahbar
Objectives: This study aimed to assess and compare the microleakage of two bulk fill and one conventional composite in class II restorations of primary posterior teeth. Materials and Methods: This in vitro, experimental study was conducted on 60 primary mandibular second molars, which were randomly divided into three groups. Standard class II cavities were prepared in teeth and restored with 3M bulk fill composite in group 1, SonicFill bulk fill composite in group 2 and Z250 conventional composite in group 3...
May 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29150135/effect-of-different-resin-luting-cements-on-the-marginal-fit-of-lithium-disilicate-pressed-crowns
#9
Radek Mounajjed, Thomas J Salinas, Tomas Ingr, Basel Azar
STATEMENT OF PROBLEM: The vertical marginal discrepancy of restorations can increase upon cementation, and poor marginal fit can lead to cement dissolution, marginal discoloration, microleakage, and secondary caries. The amount of increase is related to the type of luting cement used, but how lithium disilicate pressed crowns are affected by different resin cements is unclear. PURPOSE: The purpose of this in vitro study was to compare the effect of using different resin luting cements on the vertical marginal discrepancy of lithium disilicate pressed crowns...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29136013/monomer-conversion-dimensional-stability-strength-modulus-surface-apatite-precipitation-and-wear-of-novel-reactive-calcium-phosphate-and-polylysine-containing-dental-composites
#10
Kanokrat Kangwankai, Sarah Sani, Piyaphong Panpisut, Wendy Xia, Paul Ashley, Haralampos Petridis, Anne Margaret Young
PURPOSE: The aim was to assess monomer conversion, dimensional stability, flexural strength / modulus, surface apatite precipitation and wear of mono / tri calcium phosphate (CaP) and polylysine (PLS)-containing dental composites. These were formulated using a new, high molecular weight, fluid monomer phase that requires no polymerisation activator. MATERIALS AND METHODS: Urethane and Polypropylene Glycol Dimethacrylates were combined with low levels of an adhesion promoting monomer and a light activated initiator...
2017: PloS One
https://www.readbyqxmd.com/read/29133967/comparison-of-marginal-microleakage-of-flowable-composite-restorations-in-primary-canine-teeth-prepared-with-high-speed-diamond-bur-er-yag-laser-and-er-cr-ysgg-laser
#11
Beheshteh Malekafzali, Mohammad Asnaashari, Fateme Javadi
Background and Objectives: Adhesive restorations have become highly popular in pediatric dentistry, and novel methods of cavity preparation with minimal patient discomfort including Er:YAG and Er,Cr:YSGG laser preparations have greatly advanced. This study aimed to compare the microleakage of composite restorations of class V cavities prepared in primary canine teeth with high-speed bur and Er:YAG and Er,Cr:YSGG lasers. Materials and Methods: This in vitro study was conducted on 30 class V cavities prepared on the buccal surfaces of primary canine teeth in three groups (n = 10) of bur preparation, Er:YAG laser and Er,Cr:YSGG laser...
September 30, 2017: Laser Therapy
https://www.readbyqxmd.com/read/29109750/microbial-microleakage-assessment-of-class-v-cavities-restored-with-different-materials-and-techniques-a-laboratory-study
#12
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/29098237/-comparative-evaluation-of-marginal-microleakage-of-three-different-resins-in-class-v-composite-restorations
#13
Zheng Zhu, Ya-Qin Zhu
PURPOSE: To compare and evaluate microleakage at the occlusal wall and cervical wall in Class V cavities restored with Ivoclar Tetric N Ceram Bulk Fill composite, Tetric N Flow composite and N Ceram nanocomposite. METHODS: Sixty-six extracted human maxillary premolars, which were intact and healthy, were randomly assigned into 3 groups (n=22). Standardized Class V cavities were prepared on the buccal surface of maxillary premolars. The occlusal walls of the cavities were located on the enamel and the cervical walls were located on dentin and cementum...
June 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
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
#14
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/29053052/effect-of-laser-etching-on-glass-fiber-posts-cemented-with-different-adhesive-systems
#15
Ozge Parlar Oz, Asli Secilmis, Cemal Aydin
BACKGROUND: Glass fiber-reinforced posts have been preferred frequently because of some physical properties similar to the dentin, chemically bonding to dentin, biocompatibility, and esthetics. OBJECTIVE: This study aimed to evaluate the microleakage and bond strength of glass fiber posts cemented with various adhesive systems on laser-etched root canal walls. METHODS: Roots of 120 human mandibular premolars were divided into two groups for push-out bond strength test and the microleakage test (n = 60)...
October 19, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29042725/the-effect-of-polymerization-and-preparation-techniques-on-the-microleakage-of-composite-laminate-veneers
#16
Neslihan Celik, Merve Iscan Yapar, Numan Taşpınar, Nilgun Seven
BACKGROUND: Marginal leakage is the important factor influencing the maintenance of dental esthetic. AIM: The purpose of this study was to evaluate the relationship between the preparation techniques and type of polymerization techniques on microleakage of composite laminate veneers. MATERIALS AND METHODS: Ninety-one same sized, caries-free human maxillary central incisors were randomly assigned to 13 groups (n = 7) and were designed with four different preparation techniques (window type, feather type, bevel type, and incisal overlap type)...
July 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28989130/evaluation-of-the-sealing-capability-of-the-internal-conical-connections-of-implants-with-titanium-and-zirconia-abutments
#17
Damian L Black, Ilser Turkyilmaz, Wen Lien, Chol H Chong
AIM: The purpose of this in vitro investigation was to evaluate the sealing capability of the conical implant-abutment interfaces under different abutment screw torque values using titanium and zirconia abutments with Morse taper designs. MATERIALS AND METHODS: A total of 42 dental implants (n = 21 for titanium abutments and n = 21 for zirconia abutments) were inoculated internally with three bacteria. These assemblies were divided into four test groups (n = 10) based on screw fixation torques of 35 or 20 Ncm and placed in sterile broth; the remaining abutments were used as positive controls and torqued to 10 Ncm...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28989122/comparison-of-microleakage-of-class-v-cavities-restored-with-the-embrace-wetbond-class-v-composite-resin-and-conventional-opallis-composite-resin
#18
Maryam Tavangar, Zahra Zohri, Hosein Sheikhnezhad, Shahrzad Shahbeig
PURPOSE: This study was undertaken to compare the micro-leakage of class V cavities restored with the newly introduced Embrace WetBond class V (EWC) composite resin and conventional Opallis composite resin. MATERIALS AND METHODS: In this in vitro study, class V cavities were prepared on 30 extracted bovine incisors, with the gingival floor and the coronal margin of the cavities 1 mm apical and coronal to the cementoenamel junction (CEJ) respectively. The cavities measured 3 mm in length, 2 mm in width, and 1...
October 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28969288/storage-medium-affects-the-surface-porosity-of-dental-cements
#19
M Ali Saghiri, Asal Shabani, Armen Asatourian, Nader Sheibani
INTRODUCTION: Calcium silicate-based cements physical properties is influenced by environmental changes. AIM: Here, we intended to evaluate the effect of storage medium on surface porosity of root Mineral Trioxide Aggregate (MTA) and Biodentine cement. MATERIALS AND METHODS: A total of 40 polyethylene tubes were selected and divided into two groups: Group A (MTA) and Group B (Biodentine). Each group was subdivided into two subgroups (n=10)...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28957407/semiconductor-laser-irradiation-improves-root-canal-sealing-during-routine-root-canal-therapy
#20
Dandan Su, Xingxue Hu, Dashan Wang, Ting Cui, Ruyong Yao, Huibin Sun
OBJECTIVE: To evaluate the effect of semiconductor laser irradiation on root canal sealing after routine root canal therapy (RCT). METHODS: Sixty freshly extracted single-rooted human teeth were randomly divided into six groups (n = 10). The anatomic crowns were sectioned at the cementoenamel junction and the remaining roots were prepared endodontically with conventional RCT methods. Groups A and B were irradiated with semiconductor laser at 1W for 20 seconds; Groups C and D were ultrasonically rinsed for 60 seconds as positive control groups; Groups E and F without treatment of root canal prior to RCT as negative control groups...
2017: PloS One
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