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composite, microleakage

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https://www.readbyqxmd.com/read/30199889/impact-of-various-pressures-on-fracture-resistance-and-microleakage-of-amalgam-and-composite-restorations
#1
Elnaz Shafigh, Reza Fekrazad, Amir Reza Beglou
BACKGROUND: Pressure changes can influence dental restorations especially among divers. The aim of the current study was to evaluate the fracture resistance and microleakage of mesio-occluso-distal (MOD) amalgam and composite restorations undergoing pressure changes via diving and aviation simulation. METHODS: For the fracture resistance test, 60 sound maxillary premolar teeth were randomly allocated to two groups. Each group was then divided into three subgroups (n = 10) for simulating scuba-diving (pressure cycle to 203 kPa, 2 bar), flight (50...
September 30, 2018: Diving and Hyperbaric Medicine: the Journal of the South Pacific Underwater Medicine Society
https://www.readbyqxmd.com/read/30188252/comparison-of-er-cr-ysgg-laser-handpieces-for-class-ii-preparation-and-microleakage-of-silorane-or-methacrylate-based-composite-restorations
#2
Esra Ergin, Fatma Dilsad Oz, Sevil Gurgan
OBJECTIVE: The aim of this study was to evaluate the influence of cavity preparation with different Er,Cr:YSGG laser handpieces on microleakage of different posterior composite restorations. METHODS: Fifty-four extracted intact human premolars were randomly assigned to three groups according to cavity preparation method: Bur Group: high-speed diamond bur (Diatech), MD Group: Er,Cr:YSGG laser Waterlase MD handpiece (Biolase Millennium II), and Turbo Group: Er,Cr:YSGG laser Waterlase MD TURBO handpiece (Biolase Millennium II)...
September 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/30166827/evaluation-of-microleakage-under-orthodontic-brackets-bonded-with-nanocomposites
#3
Zohreh Hedayati, Amin Farjood
Background: The aim of this study was to evaluate the microleakage value under orthodontic brackets bonded with a nano-filled composite and to compare the results with a conventional adhesive using two different bonding systems. Materials and Methods: Forty human premolars were used in this cross-sectional study. The samples were randomly divided into four equal groups of ten: Group I: Acid etch plus Transbond XT primer and Transbond XT adhesive, Group II: Acid etch plus Transbond XT primer and nanocomposite (Filtek Z350), Group III: Scotchbond™ Universal primer plus Transbond XT, and Group IV: Scotchbond™ and nanocomposite...
July 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/30147401/micro-computed-tomography-evaluation-of-microleakage-of-class-ii-composite-restorations-an-in-vitro-study
#4
Angelo Zavattini, Manuele Mancini, James Higginson, Federico Foschi, Guido Pasquantonio, Francesco Mangani
Objective: The aim of this study is to investigate the microleakage attained with three resin-based material used to restore deep Class II cavities. A null hypothesis was chosen: there is no difference in microleakage among the tested materials. Materials and Methods: A total of 30 Class II cavities were prepared in freshly extracted molars with the proximal mesial and distal margins located, respectively, 1.5 mm apically and 1.5 mm coronally to the cementum-enamel junction...
July 2018: European Journal of Dentistry
https://www.readbyqxmd.com/read/30142038/influence-of-shrinkage-and-viscosity-of-flowable-composite-liners-on-cervical-microleakage-of-class-ii-restorations-a-micro-ct-analysis
#5
J Nie, A U Yap, X Y Wang
This study determined the influence of shrinkage and viscosity of flowable composite liners on the cervical microleakage of Class II restorations using micro-CT. Seven composites of varying viscosities were selected and included five giomers (Shofu Beautifil II [BF], Flow Plus F00 and F03 [F00 and F03], Flow F02 and F10 [F02 and F10]) and 2 nano-filled composites (3M-ESPE Filtek Z350 [Z350] and Filtek Z350 Flowable [Z350F]). Polymerization shrinkage (n=7) was assessed with the Acuvol volumetric shrinkage analyzer while complex viscosity was determined with the advanced rheometric expansion system at 25°C...
August 24, 2018: Operative Dentistry
https://www.readbyqxmd.com/read/30122814/evaluation-of-marginal-sealing-ability-of-self-adhesive-flowable-composite-resin-in-class-ii-composite-restoration-an-in-vitro-study
#6
Preeti Mishra, Shikha Jaiswal, Vineeta Nikhil, Sachin Gupta, Padmanabh Jha, Shalya Raj
Aim: The aim of this study is to evaluate the marginal sealing ability of self-adhesive flowable composite resin when used as a liner in Class II composite restoration with and without aging. Materials and Methods: A total of 120 standardized Class II tooth preparations with gingival margins 1 mm coronal and apical to cementenamel junction (CEJ) were prepared on 60 extracted permanent mandibular molars and were randomly divided into eight equal Groups: Group 1: cavities coronal to CEJ and restored with Dyad flow liner + Herculite ultra, Group 2: same as Group 1 but cavities margins apical to CEJ, Group 5: cavities coronal to CEJ and restored with only Herculite ultra, and Group 6: same as Group 5 but cavities apical to CEJ...
July 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/30106395/effect-of-different-cavity-lining-techniques-on-marginal-sealing-of-class-ii-resin-composite-restorations-in-vitro
#7
Parham Pedram, Tabassom Hooshmand, Soolmaz Heidari
This study investigated the effect of different cavity lining techniques on the marginal sealing of Class II composite restorations. A total of 36 human molar teeth, free of caries and fillings, were each prepared with two proximal Class II boxes mesially and distally. In mesial boxes, cavity liners were applied as follows: in group 1, separately cured flowable composite; in group 2, co-cured flowable composite; and in group 3, resin-modified glass ionomer (RMGI). The remaining cavities were filled incrementally with a universal restorative composite...
August 14, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/30077649/influence-of-er-cr-ysgg-laser-on-adhesive-strength-and-microleakage-of-dentin-bonded-to-resin-composite-in-vitro-study
#8
Fahim Vohra, Abdullah Alghamdi, Mohammed Aldakkan, Sultan Alharthi, Osama Alturaigi, Mohammed Alrabiah, Khulud Abdulrahman Al-Aali, Ali Alrahlah, Mustafa Naseem, Tariq Abduljabbar
BACKGROUND: The aim of this study was to evaluate the surface treatment of dentin with phototherapy (ER-CR-YSGG laser) in the presence of different bonding systems on their shear bond strength and microleakage. MATERIALS AND METHODS: Eighty intact human third molars were divided into two groups. Forty teeth were treated with conventional flat wheel diamond bur and the remaining forty were treated with Er Cr YSGG laser (phototherapy). The two groups i.e. treated with laser (l) and group treated with abrasive bur (NL) were further divided into two subgroups of twenty samples each...
August 2, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/30074007/microleakage-of-glass-ionomer-based-restorative-materials-in-primary-teeth-an-in-vitro-study
#9
B Ayna, S Celenk, O Atas, E C Tümen, E Uysal, I R Toptanci
Aim: Using AutoCAD, we examined the microleakage of dye at the edges of primary-teeth restorations using three glass ionomer-based restorative materials. Materials and Methods: A total of 30 extracted noncarious primary molars were used. Class V cavities were adjusted on the buccal surfaces. The teeth were randomly divided into three groups of 10 teeth each as follows: Group A (Ketac Molar), Group B (Photac Fil), and Group C (Dyract XP). All specimens were stored for 24 h at 37°C in distilled water...
August 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/30034008/evaluation-of-microleakage-in-zirconomer%C3%A2-a-zirconia-reinforced-glass-ionomer-cement
#10
Rawan Albeshti, Saroash Shahid
Objective: To evaluate the microleakage of four direct restorative materials. Materials and Methods: Sixteen sound bovine incisors were chosen and randomly divided into four groups; Group I-Zirconomer, Group II-KetacTM Silver, Group III-FiltekTM Z500 (composite) and Group IV-Dispersalloy ® (amalgam). Seven proximal (mesial & distal) cavities, for each material were prepared and restored. All restored samples were stored in 37o C distilled water for 24 hr and then subjected to thermo-cycling process at temperatures between 5-55o C...
June 2018: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/29964249/evaluation-of-marginal-leakage-after-mechanical-fatigue-cycling-of-composite-inlays-luted-with-different-cements
#11
Dario Melilli, Enzo Maria Cumbo, Paolo Baldissara, Vinicius Felipe Wandscher, Luiz Felipe Valandro, Giuseppe Gallina, Giuseppe Pizzo
This in vitro study evaluated the marginal microleakage of composite inlays luted with 3 different cement systems. The null hypothesis was that the luting materials would not influence dye penetration, showing the same degree of microleakage. Thirty-six sound molars were selected, mesio-occlusodistal cavities were prepared, and the teeth were randomly divided into 3 groups (n = 12). Composite resin inlay restorations were made and cemented using a dual-curing resin cement (Calibra), a light-curing flowable composite (Charisma Flow), or a self-adhesive resin cement (RelyX Unicem)...
July 2018: General Dentistry
https://www.readbyqxmd.com/read/29925731/effects-of-different-resin-adhesives-on-the-microleakage-in-a-new-model-with-simulated-subgingival-condition-and-pulpal-pressure
#12
Zhongjun Liu, Xinyuan Zhao, Xiongqun Zeng, Shuaimei Xu, Yu Lu, Dingming Huang
Resin adhesive restorations are susceptible to oral fluid contamination and greatly influenced by dentinal tubule fluid because of pulpal pressure, especially when the restorative cavities are near gingival tissues. This study designed a novel model to evaluate the microleakage of self-adhesive flowable composite and traditional resin adhesives under simulated subgingival cavity preparations and pulpal pressure. We applied three different adhesive systems, include Vertise Flow, Optibond all-in-one, and Optibond S, on premolars with V-shaped cavity...
June 20, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29922341/comparison-of-composite-resin-and-porcelain-inlays-for-restoration-of-noncarious-cervical-lesions-an-in-vitro-study
#13
Hui Theng Chee, Wan Zaripah Wan Bakar, Zuryati Ab Ghani, Bennett T Amaechi
Background: Composite resin (CR) currently is one of the most commonly used material in restoring noncarious cervical lesions (NCCL) due to its strength and esthetics color but has microleakage problem. The aim of this study is to compare in vitro the microleakage depth between CR and porcelain in restoring NCCL. Materials and Methods: This an in vitro study was done by preparing cavities on the buccocervical surface of 62 extracted premolar teeth which randomly assigned to two groups ( n = 31) where Group 1 was restored with nanocomposite and Group 2 was cemented with porcelain cervical inlays...
May 2018: Dental Research Journal
https://www.readbyqxmd.com/read/29906619/effect-of-antimicrobial-photodynamic-therapy-on-microleakage-of-class-v-cavities-restored-with-composite-resin
#14
Ladan Madani, Edwin Sarkisians, Nazanin Kiomarsi, Mohammad Javad Kharazi Fard, Nasim Chiniforush
OBJECTIVES: Disinfection of enamel and dentin following cavity preparation is a necessity. Considering the possible effect of antimicrobial agents on tooth structure and dental adhesives, this study aimed to assess the microleakage of composite restorations following disinfection of cavity walls with antimicrobial photodynamic therapy (aPDT). MATERIALS AND METHODS: Standard class V cavities were prepared in the buccal surfaces of 68 extracted human premolars. The teeth were then randomly divided into four groups (n = 17) for use of different adhesive systems (Adper Single Bond 2 or One-Step Plus) and disinfection with aPDT...
June 12, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29899641/effect-of-local-anesthesia-containing-vasoconstrictor-on-sealing-ability-of-dentin-with-two-adhesive-systems-dye-leakage-and-scanning-electron-microscopy-study
#15
Rakesh Singla, Sanjay Tewari, Jigyasa Duhan, Sudhir Kumar, Gurdeep Singh Gill, Namita Jain
Objectives: To evaluate the effect of 2% lignocaine containing 1:80,000 adrenaline on the microleakage and ultrastructure of resin tooth interface using an acetone based total etch adhesive (Prime and Bond NT) and an ethanol water based self etch adhesive system (Xeno III). Materials and method: Class V cavities were prepared on buccal surfaces of 72 maxillary first premolars scheduled for orthodontic extraction. In 36 premolars procedure was performed under local anaesthesia (LA) and in other 36 teeth without LA...
May 2018: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29881311/assessment-of-microleakage-of-class-v-restored-by-resin-composite-and-resin-modified-glass-ionomer-and-pit-and-fissure-resin-based-sealants-following-er-yag-laser-conditioning-and-acid-etching-in-vitro-study
#16
Emilie Luong, Amir Shayegan
Aim: The aim of this study was to make a comparison between microleakage of conventionally restored class V cavities using acid etchant and the ones conditioned by erbium-doped yttrium aluminum garnet (Er:YAG) laser, and also to assess and compare the effectiveness of enamel surface treatments of occlusal pits and fissures by acid etching and conditioned by Er:YAG laser-etch. Materials and methods: Seventy-two extracted third molars were used in this study. The samples were divided into two major groups: class V cavities and pit and fissure sealants...
2018: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/29857989/modification-of-the-restoration-protocol-for-resin-based-composite-rbc-restoratives-conventional-and-bulk-fill-on-cuspal-movement-and-microleakage-score-in-molar-teeth
#17
I Politi, L E J McHugh, R S Al-Fodeh, G J P Fleming
OBJECTIVE: To modify the resin-based composite (RBC) restoration protocol for standardised Class II cavities in third molar teeth restored using conventional RBCs or their bulk fill restorative counterparts. Employing cuspal deflection using a twin channel deflection measuring gauge (during) and microleakage to determine marginal integrity (following) RBC restoration, the modified restoration protocol results were compared with traditional (oblique) restoration of Class II cavities. METHODS: Thirty-two sound third molar teeth, standardised by size and morphology, were subjected to standardised Class II cavity preparations and randomly allocated to four groups...
September 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29813001/optical-evaluation-of-enamel-microleakage-with-one-step-self-etch-adhesives
#18
Alaa Turkistani, Maha Almutairi, Nouf Banakhar, Reem Rubehan, Sulafa Mugharbil, Ahmed Jamleh, Adnan Nasir, Turki Bakhsh
OBJECTIVE: In this in vitro study, cross-polarization optical coherence tomography (CP-OCT) was used to evaluate microleakage in dental composite restorations bonded to enamel with two types of one-step self-etching (SE) adhesives. BACKGROUND DATA: One-step SE adhesives were proposed to simplify bonding of composite restorations. However, bonding of these simplified adhesive to dental enamel is still questionable. OCT is a promising diagnostic tool that allows micron-scale imaging of biological tissues and structures...
May 29, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29721224/porosity-analysis-of-mta-and-biodentine-cements-for-use-in-endodontics-by-using-micro-computed-tomography
#19
Fabricio Guerrero, Esther Berástegui
Background: The purpose of this study is to compare the porosity of two repair cements, White ProRoot® MTA and Biodentine®. These samples were analyzed by using micro-computed microtomography. Material and Methods: Sixteen samples were used in the study that were divided according to the composition of the materials used. White ProRoot® MTA (n = 8) and Biodentine® (n = 8) were the samples prepared according to the manufacturer's instructions. They were placed in silicone molds of 5 ± 0...
March 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29714702/effect-of-fiber-inserts-on-gingival-margin-microleakage-of-class-ii-bulk-fill-composite-resin-restorations
#20
Fereshteh Shafiei, Maryam Doozandeh, Vahid Karimi
This study evaluated the effect of fiber inserts combined with composite resins on enamel and dentin margin microleakage. The fiber inserts were used with high- (x-tra fil) and low-viscosity (x-tra base) bulk-fill composite resins and as well as conventional composite resins (Grandio and Grandio Flow). In 96 sound, recently extracted molars, 2 standardized Class II cavities were prepared. The teeth were randomly divided into 8 groups of 12 teeth each, based on composite resin type and presence or absence of fiber inserts: groups 1 and 2, x-tra fil with and without fiber inserts, respectively; groups 3 and 4, x-tra base with and without fiber inserts; groups 5 and 6, Grandio with and without fiber inserts; and groups 7 and 8, Grandio Flow liner (gingival floor)/Grandio (remainder of cavity) with and without fiber inserts...
May 2018: General Dentistry
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