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K Tolidis, C Boutsiouki, P Gerasimou
AIM: Carbomer cement represents a novel glass-ionomer which gradually mineralises into fluoroapatite. Purpose of this study was to evaluate microleakage around restorations in deciduous teeth made with composite resin, conventional glass-ionomer cement, resin-modified glass-ionomer cement and carbomer/fluoroapatite-enhanced glass-ionomer cement. MATERIALS AND METHODS: A group of 40 primary upper canines, primary upper and lower molars was divided into 4 groups (n=10)...
September 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
Elen Guerra, Cristiane Pereira, Renata Faria, Antonio Olavo Jorge, Marco Antonio Bottino, Renata Marques de Melo
This study evaluated the in vitro bacterial microleakage at the implant-abutment interface of three prosthetic connections: external (EH) and internal hexagon (IH) and taper connection (TC: solid [ST], taper with internal hexagon [IT], and short taper [OT]). Escherichia coli (E coli) and Streptococcus sanguinis (S sanguinus) were inoculated in the apical portion of the abutment screw, which was immersed in sterile brain-heart infusion broth for 14 days. There were no differences between the percentages of bacterial infiltration for IH (9...
November 2016: International Journal of Periodontics & Restorative Dentistry
Fereshteh Shafiei, Nazanin Berahman, Elmira Niazi
BACKGROUND: Repair is a conservative treatment of defective composite restoration. Sealing the repair interface is a critical factor to achieve successful repaired restorations. OBJECTIVE: The aim of this study was to evaluatethe effect of three finishing times on the microleakage at the composite-repair interface. METHOD: Eighty composite specimens (Z250) were made and aged for eight weeks in water. They were randomly divided into four groups...
2016: Open Dentistry Journal
Abad-Coronel Cristian, Li Jeanette, Martínez-Rus Francisco, Pradíes Guillermo
Objectives. To evaluate microleakage and absolute marginal discrepancy (AMD) and to assess correlation between AMD and microleakage with four resin luting cements. Material and Methods. 20 extracted human third molars were prepared for full-coverage crowns. 20 zirconia copings were made (LAVA, 3M ESPE) and cemented. Specimens were randomly allocated for each used type of cement into 4 groups, RelyX® (Rx), Multilink® (Mk), PANAVIA 2.1® (P), and Maxcem® (Mx) and immersed in 10% safranin for 72 hours. 20x magnification lenses were used to observe microleakage areas (μm(2)) and images software was used to measure AMD areas (μm)...
2016: International Journal of Dentistry
V F Wandscher, C D Bergoli, I F Limberger, T P Cenci, P Baldissara, L F Valandro
OBJECTIVE: This article aims to present a fractographic analysis of an anterior tooth restored with a glass fiber post with parallel fiber arrangement, taking into account force vectors, finite element analysis, and scanning electron microscopy (SEM). METHODS: A patient presented at the Faculty of Dentistry (Federal University of Santa Maria, Brazil) with an endodontically treated tooth (ETT), a lateral incisor that had a restorable fracture. The treatment was performed, and the fractured piece was analyzed using stereomicroscopy, SEM, and finite element analysis...
September 2016: Operative Dentistry
M Metz, M Durski, J Chou, G Crim, B Harris, W-S Lin
OBJECTIVE: For some esthetic clinical situations, it is necessary to finish crown margins on direct restorative materials to preserve tissue integrity, bonding integrity, and biological width. The purpose of this research was to investigate microleakage at the interface between bonded lithium disilicate crowns and various direct restorative materials in a class III and class V position. METHODS AND MATERIALS: Class III or class V restorations were prepared on one side of extracted incisors with either Tetric EvoCeram, Tetric Evoceram Bulk, Fuji II LC, or Tetric Evoflow...
September 2016: Operative Dentistry
Vesna Miletic, Dejan Peric, Milos Milosevic, Dragica Manojlovic, Nenad Mitrovic
OBJECTIVE: To compare strain and displacement of sculptable bulk-fill, low-shrinkage and conventional composites as well as dye penetration along the dentin-restoration interface. METHODS: Modified Class II cavities (N=5/group) were filled with sculptable bulk-fill (Filtek Bulk Fill Posterior, 3M ESPE; Tetric EvoCeram Bulk Fill, Ivoclar Vivadent; fiber-reinforced EverX Posterior, GC; giomer Beautifil Bulk, Schofu), low-shrinkage (Kalore, GC), nanohybrid (Tetric EvoCeram, Ivoclar Vivadent) or microhybrid (Filtek Z250, 3M ESPE) composites...
September 26, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Babita Niranjan, Nandihalli Devendrappa Shashikiran, Shilpy Singla, Ruchi Thakur, Aashutosh Dubey, Satish Maran
INTRODUCTION: A major objective in restorative dentistry is the control of marginal leakage, which may occur because of dimensional changes or lack of adaptation of restorative material to the cavity preparation. Numerous techniques have been advocated to overcome polymerization shrinkage in composite restorations. AIM AND OBJECTIVES: This study investigated microleakage of three different bases under composite resin in sandwich technique using dye penetration and dentin surface interface using scanning electron microscope (SEM)...
October 2016: Journal of the Indian Society of Pedodontics and Preventive Dentistry
Shu-Fen Chuang, Pin-Sheng Huang, Terry Yuan-Fang Chen, Lo-Hao Huang, Ko-Chih Su, Chi-Han Chang
OBJECTIVES: To investigate the effects of light curing protocols on the shrinkage behaviors, contraction stress, and microleakage in composite restorations by an experimental-numerical hybrid analysis. METHODS: Three groups of human molars were collected to receive different light-curing protocols: vertical or oblique curing at regular intensity, and vertical curing at reduced intensity. For each tooth, the composite fillings were consecutively placed under unbonded and bonded states, and their shrinkage behaviors were examined with a digital image correlation (DIC) technique...
September 23, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Noor-Ul-Ain Jawaed, Syed Yawar Ali Abidi, Fazal-Ur-Rehman Qazi, Shahbaz Ahmed
OBJECTIVE: To evaluate the coronal microleakage of packable composite using conventional incremental and posterior bulk fill flowable composite using Smart Dentine Replacement Single Step technique in the cervical margins of class II cavities in dentine using the dye penetration method. STUDY DESIGN: In-vitroInterventional study. PLACE AND DURATION OF STUDY: Department of Operative Dentistry, Dr. Ishrat-ul-Ebad Khan Institute of Oral Health Sciences (DIKIOHS), Karachi, from November 2012 to April 2013...
September 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
Prashant Babaji, Shivali Vaid, S Deep, Samvit Mishra, Madhulika Srivastava, Thomas Manjooran
AIM AND OBJECTIVES: Fissure caries is most common in children due to deep pit and fissures. Pit and fissure areas on the occlusal surface of the teeth make them susceptible to dental caries, which need to be prevented or restored. Fissures sealant reduces the risk of occlusal caries. The present study was done to evaluate microleakage and shear bond strength of various fissure sealants. MATERIALS AND METHODS: Thirty-six extracted molars were randomly allocated equally (n = 12) into three groups with three different sealants to evaluate shear bond strength and microleakage at sealant space...
August 2016: Journal of International Society of Preventive & Community Dentistry
Lovejeet Ahuja, Purshottam Jasuja, Kanika Gupta Verma, Suruchi Juneja, Aditi Mathur, Rashmeet Walia, Ashish Kakkar, Metashi Singla
INTRODUCTION: Root canal obturation is the most important step in the root canal treatment that aims to obtain a complete hermetic seal and to prevent the re-growth of microorganisms in the root canal system. To accomplish this, many endodontic obturation materials and sealers are being used. AIM: To evaluate and compare the apical microleakage of a resin based sealer; Adseal with Mineral Trioxide Aggregate (MTA) based sealers; Pro root MTA and MTA Fillapex. MATERIALS AND METHODS: Total 75 extracted human single rooted teeth were taken and decoronated at cemento-enamel junction...
July 2016: Journal of Clinical and Diagnostic Research: JCDR
Allwyn Samuel, Sharath Asokan, P R Geetha Priya, Seby Thomas
OBJECTIVE: The aim of this study was to compare the sealing ability of mineral trioxide aggregate (MTA) and Biodentine™ when used to repair the furcal perforations in primary molars using scanning electron microscope (SEM). STUDY DESIGN: The study sample comprised forty recently extracted primary molars. These teeth were placed in a 5.25% sodium hypochlorite solution for 24 h and washed with tap water. Access cavities were made using a round bur in high-speed handpiece...
July 2016: Contemporary Clinical Dentistry
S Gupta, A Paliwal, S Patel, M Bhati, Fyi Asiri, A H Shah
Aim: Comparative analysis of the coronal microleakage of a self-etching priming dentin adhesive with the use of antioxidant (Sodium Ascorbate (SA) and herbal quercetin) after Sodium hypochloride (NaOCl) and hydrogen-peroxide (H 2O2) irrigation. Materials and Methods: Seventy single root canals were enlarged and seven different treatment protocols were applied throughout the root canal treatment. The groups 1, 2 and 3 were irrigated with NaOCl. Group 1 was used as the negative control with only NaOCl irrigation whereas in group 2, Sodium ascorbate was applied as an additional irrigation agent following NaOCl...
October 15, 2015: West Indian Medical Journal
Ronald E Goldstein, Suruchi Lamba, Nathaniel C Lawson, Preston Beck, Robert A Oster, John O Burgess
OBJECTIVES: To measure microleakage around class V composite restorations after piezoelectric ultrasonic scaling and sonic toothbrushing. METHODS: 3 mm × 2 mm × 1.5 mm boxes were prepared on buccal and lingual surfaces of extracted molars centered on the cementum-enamel junction. Half the preparations were beveled (0.5 mm). Preparations were restored with composite and polished. Restorations on one side of the teeth were either traced with an ultrasonic scaler (60 seconds, n = 16) or brushed in a sonic toothbrushing machine (2 hours, n = 16)...
September 9, 2016: Journal of Esthetic and Restorative Dentistry
Prajakta Patil, Vishnu P S Rathore, Chetan Hotkar, Snehal S Savgave, K Raghavendra, Priya Ingale
AIMS: The present study aimed to compare apical sealing ability between GuttaFlow and AH Plus. MATERIALS AND METHOD: Eighty extracted human maxillary anterior teeth with fully formed apex and straight root were collected for this study. The root canals were cleaned and shaped using a standard step back preparation to size 60# master apical file at the established working length and divided into four groups: Group 1, GuttaFlow sealer with gutta-percha; Group 2, AH Plus sealer with gutta-percha; Group 3, positive control group (Teeth were instrumented and left without obturation); Group 4, negative control group (Teeth were totally coated with nail varnish) Dye leakage was carried out...
July 2016: Journal of International Society of Preventive & Community Dentistry
Meraj Sultana, Mohammad A Musani, Iffat M Ahmed
AIMS AND OBJECTIVES: Endodontic treatment is directed to eliminate microbial challenges from the root canal system and to create a complete seal. The aim of this study was to assess the apical sealing ability of resin-based Epiphany-Resilon root canal filling system and to compare it with the sealing abilities of different combinations of AH Plus, gutta-percha, Epiphany, and Resilon. MATERIALS AND METHODS: One hundred extracted human maxillary incisor roots were treated endodontically...
July 2016: Journal of International Society of Preventive & Community Dentistry
Shahriar Shahi, Soniya Jeddi Khajeh, Saeed Rahimi, Hamid R Yavari, Farnaz Jafari, Mohammad Samiei, Negin Ghasemi, Amin S Milani
BACKGROUND: Calcium-enriched mixture (CEM) cement is used in the field of endodontics. It is similar to mineral trioxide aggregate in its main ingredients. The present study investigated the effect of different mixing methods on the bacterial microleakage of CEM cement. METHODS: A total of 55 human single-rooted human permanent teeth were decoronated so that 14-mm-long samples were obtained and obturated with AH26 sealer and gutta-percha using lateral condensation technique...
October 2016: Minerva Stomatologica
Zeynep A Güçlü, Nazmiye Dönmez, Andrew P Hurt, Nichola J Coleman
OBJECTIVES: The aim of this study was to characterise the new hydrophilic fissure sealant, UltraSeal XT® hydro™ (Ultradent Products, USA), and to investigate its in vitro resistance to microleakage after placement on conventionally acid etched and sequentially lased and acid etched molars. MATERIAL AND METHODS: The sealant was characterised by Fourier transform infra-red spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and Vickers indentation test...
July 2016: Journal of Applied Oral Science: Revista FOB
Maíra Prado, Marilia Santana de Oliveira Menezes, Brenda Paula Figueiredo de Almeida Gomes, Carlos Augusto de Melo Barbosa, Leonardo Athias, Renata Antoun Simão
This study was designed to evaluate the effects of Oxygen and Argon plasma on gutta-percha surfaces. A total of 185 flat smooth gutta-percha surfaces were used. Samples were divided into groups: control: no plasma treatment; Oxygen: treatment with Oxygen plasma for 1min; Argon: treatment with Argon plasma for 1min. Samples were evaluated topographically by scanning electron microscopy and atomic force microscopy; and chemically by Fourier Transform-infrared Spectroscopy. A goniometer was used to determine the surface free energy and the wettability of the endodontic sealers...
November 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
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