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https://www.readbyqxmd.com/read/28094232/comparative-evaluation-of-shear-bond-strength-of-metallic-brackets-bonded-with-two-different-bonding-agents-under-dry-conditions-and-with-saliva-contamination
#1
Mashallah Khanehmasjedi, Mohammad Ali Naseri, Samaneh Khanehmasjedi, Leila Basir
BACKGROUND: This study compared the shear bond strength of metallic brackets bonded with Single Bond and Assure bonding agents under dry and saliva-contamination conditions. METHODS: Sixty sound premolar teeth were selected, and stainless-steel brackets were bonded on enamel surfaces with Single Bond and Assure bonding agents under dry condition or with saliva contamination. Shear bond strength values of brackets were measured in a universal testing machine. The adhesive remnant index scores were determined after debonding of the brackets under a stereomicroscope...
January 13, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28088459/strain-development-in-bulk-filled-cavities-of-different-depths-characterized-using-a-non-destructive-acoustic-emission-approach
#2
Annelies Van Ende, Diogo Pedrollo Lise, Jan De Munck, Johan Vanhulst, Martine Wevers, Bart Van Meerbeek
OBJECTIVES: (1) To evaluate the effect of cavity depth and composite type on the interfacial debonding in bulk-filled cavities. (2) To correlate the theoretical shrinkage stress and the level of interfacial debonding determined by acoustic emission (AE). METHODS: 80 sound molars were divided in two groups to receive a Class-I cavity (3.5×3.5mm) with 2.5- or 4.0-mm depth. The cavities were restored with either a conventional paste-like (Filtek Z100, 3M ESPE), a conventional flowable (G-ænial Universal Flo, GC), a bulk-fill paste-like (Tetric EvoCeram Bulk Fill, Ivoclar Vivadent) or a bulk-fill flowable (SDR, Dentsply) composite (n=10)...
January 11, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28076292/445-nm-diode-laser-assisted-debonding-of-self-ligating-ceramic-brackets
#3
Steffen Stein, Alexander Kleye, Michael Schauseil, Andreas Hellak, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVES: This study determined the influence of irradiation on aesthetic ceramic brackets with a novel 445-nm diode laser prior to debonding on the bracket failure mode. MATERIALS AND METHODS: Thirty ceramic brackets (In-Ovation® C, GAC) were standard-bonded to the oral and buccal planed and polished enamel surfaces of 15 caries-free human 3rd molars. Prior to study-blinded debonding, the brackets in the laser group were irradiated with the diode laser (SIROLaser Blue®, Sirona), while the irradiation was simulated within the conventional group...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28068189/intrapulpal-temperature-increase-during-er-yag-laser-aided-debonding-of-ceramic-brackets
#4
Hilal Yilanci, Zeynep Beyza Yildirim, Sabri Ilhan Ramoglu
OBJECTIVE: The purpose of this study was to evaluate the temperature changes in the pulp chamber while using a newly introduced application of Er:YAG laser to debond ceramic brackets in a study model with a pulpal circulation with and without thermocycled samples. BACKGROUND DATA: An esthetic alternative to stainless steel brackets, ceramic brackets have been proposed. However, because of their low fracture resistance and high bond strengths, ceramic brackets can cause a problem when they are being removed using conventional techniques...
January 9, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28062127/flowable-composites-for-restoration-of-non-carious-cervical-lesions-three-year-results
#5
Sabine May, Fabian Cieplik, Karl-Anton Hiller, Wolfgang Buchalla, Marianne Federlin, Gottfried Schmalz
OBJECTIVES: To evaluate the clinical performance of two flowable composites for restoring Class-V non-carious cervical lesions (NCCLs), one with novel (ND; N'Durance(®) Dimer Flow, Septodont) and one with modified conventional matrix composition (FS; Filtek™ Supreme XTE Flow, 3M-ESPE). The null hypothesis was that both flowable composites perform equally regarding clinical quality and survival. METHODS: 50 patients received one ND and one FS restoration of NCCLs in premolars using Clearfil Protect Bond (Kuraray) as an adhesive...
January 3, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28050507/shear-bond-strength-of-ceramic-brackets-with-different-base-designs-comparative-in-vitro-study
#6
Mohd Younus Ansari, Deepak K Agarwal, Ankur Gupta, Preeti Bhattacharya, Juhi Ansar, Ravi Bhandari
INTRODUCTION: Knowledge about the Shear Bond Strength (SBS) of ceramic brackets with different base design is essential as it affects bond strength to enamel. AIM: The aim of the present study was to evaluate and compare the effect of base designs of different ceramic brackets on SBS, and to determine the fracture site after debonding. MATERIALS AND METHODS: Four groups of ceramic brackets and one group of metal brackets with different base designs were used...
November 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28040608/the-effect-of-phosphoric-and-phosphonic-acid-primers-on-bone-cement-bond-strength-to-total-hip-stem-alloys
#7
Eike Jakubowitz, Louisa Liehn, Alexander Jahnke, Bernd Wöstmann, Markus Rickert, Thomas Niem
Aseptic loosening at alloy-cement interfaces constitutes a main failure mechanism of cemented total hip replacements (THR). As a potential solution we investigated the effect of metal primers containing phosphoric and phosphonic acid on shear bond strength (SBS) of bone cement to THR alloys (CoCrMo, TiAlNb) and pure tin (Sn) substrates (20×8×3 mm). Metal surfaces were modified by polishing or Al2O3 blasting and primer application. Substrates without primer treatment served as references. Cylindrical cement pins (Ø 5mm) were polymerised onto substrate surfaces and aging (1, 5, 14 and 150 days) was simulated in aqueous NaCl solution (0...
December 21, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28040026/investigation-of-guided-wave-propagation-in-pipes-fully-and-partially-embedded-in-concrete
#8
Eli Leinov, Michael J S Lowe, Peter Cawley
The application of long-range guided-wave testing to pipes embedded in concrete results in unpredictable test-ranges. The influence of the circumferential extent of the embedding-concrete around a steel pipe on the guided wave propagation is investigated. An analytical model is used to study the axisymmetric fully embedded pipe case, while explicit finite-element and semi-analytical finite-element simulations are utilised to investigate a partially embedded pipe. Model predictions and simulations are compared with full-scale guided-wave tests...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28035838/efficacy-of-auxiliary-devices-for-removal-of-fluorescent-residue-after-bracket-debonding
#9
Rafael Santos Rocha, Fabio Martins Salomão, Lucas Silveira Machado, Renato Herman Sundfeld, Ticiane Cestari Fagundes
OBJECTIVE: To evaluate four protocols for removal of fluorescent materials after bracket debonding. MATERIALS AND METHODS: Resin removal from 40 bovine enamel surfaces was performed according to groups (n = 10): conventional (C), white LED (W), LED that evidenced fluorescence (F), and fluorescent lens (FL). The following analyses were performed: sample thickness, superficial area of resin residue, and areas of resin residue or worn enamel in depth. ANOVA and Tukey tests were used to analyze sample thickness (P ≤ ...
December 30, 2016: Angle Orthodontist
https://www.readbyqxmd.com/read/28024770/indirect-vs-direct-bonding-of-mandibular-fixed-retainers-in-orthodontic-patients-comparison-of-retainer-failures-and-posttreatment-stability-a-2-year-follow-up-of-a-single-center-randomized-controlled-trial
#10
Fabienne Egli, Efstathia Bovali, Stavros Kiliaridis, Marie A Cornelis
INTRODUCTION: The objectives of this 2-arm parallel trial were to compare the numbers of failures of mandibular fixed retainers bonded with indirect and direct methods and to investigate the posttreatment changes 2 years after placement. METHODS: Sixty-four consecutive patients from the postgraduate orthodontic clinic of the University of Geneva in Switzerland were randomly allocated to either an indirect or a traditional direct bonding procedure of a mandibular fixed retainer at the end of their orthodontic treatment (T0)...
January 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28024328/high-capacitance-mechanism-for-ti3c2tx-mxene-by-in-situ-electrochemical-raman-spectroscopy-investigation
#11
Minmin Hu, Zhaojin Li, Tao Hu, Shihao Zhu, Chao Zhang, Xiaohui Wang
MXenes represent an emerging family of conductive two-dimensional materials. Their representative, Ti3C2Tx, has been recognized as an outstanding member in the field of electrochemical energy storage. However, an in-depth understanding of fundamental processes responsible for the superior capacitance of Ti3C2Tx MXene in acidic electrolytes is lacking. Here, to understand the mechanism of capacitance in Ti3C2Tx MXene, we studied electrochemically the charge/discharge processes of Ti3C2Tx electrodes in sulfate ion-containing aqueous electrolytes with three different cations, coupled with in situ Raman spectroscopy...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/27941617/concrete-infill-monitoring-in-concrete-filled-frp-tubes-using-a-pzt-based-ultrasonic-time-of-flight-method
#12
Mingzhang Luo, Weijie Li, Chuang Hei, Gangbing Song
Concrete-filled fiber-reinforced polymer tubes (CFFTs) have attracted interest for their structural applications in corrosive environments. However, a weak interfacial strength between the fiber-reinforced polymer (FRP) tube and the concrete infill may develop due to concrete shrinkage and inadequate concrete compaction during concrete casting, which will destroy the confinement effect and thereby reduce the load bearing capacity of a CFFT. In this paper, the lead zirconate titanate (PZT)-based ultrasonic time-of-flight (TOF) method was adopted to assess the concrete infill condition of CFFTs...
December 7, 2016: Sensors
https://www.readbyqxmd.com/read/27939656/clinical-audit-of-posterior-three-unit-fixed-movable-resin-bonded-fixed-partial-dentures-a-retrospective-preliminary-clinical-investigation
#13
Michael G Botelho, John E Dyson, Thomas H F Mui, Walter Y H Lam
BACKGROUND: Two-unit cantilevered resin-bonded fixed partial dentures (RBFPDs) have higher retention rates over longer span fixed-fixed RBFPDs. It has been hypothesized that interabutment stresses associated with fixed-fixed designs cause prosthesis debonds therefore for the replacement of molar-sized and longer spans, non-rigid connectors have been used to allow independent movement between two abutment teeth. OBJECTIVES: This preliminary study evaluates the clinical longevity and subjects' satisfaction of three-unit fixed-movable (FM3) RBFPDs provided at a dental teaching hospital...
December 6, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27934152/combined-effect-of-chain-extension-and-supramolecular-interactions-on-rheological-and-adhesive-properties-of-acrylic-pressure-sensitive-adhesives
#14
Xavier Callies, Olivier Herscher, Cécile Fonteneau, Alexis Robert, Sandrine Pensec, Laurent Bouteiller, Guylaine Ducouret, Costantino Creton
A new approach for the elaboration of low molecular weight pressure-sensitive adhesives based on supramolecular chemistry is explored. The synthesis of model systems coupled with probe-tack tests and rheological experiments highlights the influence of the transient network formed by supramolecular bonds on the adhesion energy. The first step of our approach consists of synthesizing poly(butyl acrylate-co-glycidyl methacrylate) copolymers from a difunctional initiator able to self-associate by four hydrogen bonds between urea groups...
December 7, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27903250/effectiveness-of-bovine-derived-xenograft-versus-bioactive-glass-with-periodontally-accelerated-osteogenic-orthodontics-in-adults-a-randomized-controlled-clinical-trial
#15
Maha A Bahammam
BACKGROUND: Periodontally accelerated osteogenic orthodontics (PAOO) combines periodontal therapy with orthodontic therapy, which minimises treatment time. This study compared the effectiveness of a bovine-derived xenograft with that of bioactive glass when combined with PAOO for the treatment of adult patients with moderate crowding of the teeth. METHODS: In this prospective, single-masked clinical trial, 33 orthodontic patients (20 women, 13 men; mean age 21.2 ± 1...
November 30, 2016: BMC Oral Health
https://www.readbyqxmd.com/read/27896419/effects-of-enamel-sealing-on-shear-bond-strength-and-the-adhesive-remnant-index-study-of-three-fluoride-releasing-adhesives-in-combination-with-metal-and-ceramic-brackets
#16
Elisabeth Hofmann, Laura Elsner, Ursula Hirschfelder, Thomas Ebert, Sebastian Hanke
OBJECTIVES: Selected combinations of materials were used to create tooth-adhesive-bracket complexes to evaluate shear bond strength (SBS) and the adhesive remnant index (ARI) with regard to enamel sealing. METHODS: Four adhesive systems also appropriate for use as enamel sealants were combined with four bracket types, resulting in 16 adhesive-bracket combinations, each of which was tested on 15 permanent bovine incisors. Sealant-adhesives included two recently introduced fluoride-releasing systems (Riva bond LC(®) and go!(®)), one established primer (Opal(®) Seal™), and one commonly used adhesive as control (Transbond™ XT)...
November 28, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/27896210/comparison-of-the-bonding-strengths-of-second-and-third-generation-light-emitting-diode-light-curing-units
#17
Hee-Min Lee, Sang-Cheol Kim, Kyung-Hwa Kang, Na-Young Chang
OBJECTIVE: With the introduction of third-generation light-emitting diodes (LEDs) in dental practice, it is necessary to compare their bracket-bonding effects, safety, and efficacy with those of the second-generation units. METHODS: In this study, 80 extracted human premolars were randomly divided into eight groups of 10 samples each. Metal or polycrystalline ceramic brackets were bonded on the teeth using second- or third-generation LED light-curing units (LCUs), according to the manufacturers' instructions...
November 2016: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/27871710/microbiological-assessment-of-aerosol-generated-during-debond-of-fixed-orthodontic-appliances
#18
Michael Dawson, Valeria Soro, David Dymock, Robert Price, Helen Griffiths, Tom Dudding, Jonathan R Sandy, Anthony J Ireland
INTRODUCTION: The aims of this study were to describe bacterial load and diversity of the aerosol created during enamel cleanup after the removal of fixed orthodontic appliances and to assess the effect of a preprocedural mouth rinse. METHODS: The study involved the sampling of ambient air adjacent to the patient's mouth during adhesive removal using a slow-speed handpiece and a spiral fluted tungsten carbide bur without water irrigation. Sampling was carried out during enamel cleanup with or without a preprocedural mouth rinse of either sterile water or chlorhexidine...
November 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27871708/treatment-associated-changes-in-malocclusion-and-oral-health-related-quality-of-life-a-4-year-cohort-study
#19
David L Healey, Robin D C Gauld, W Murray Thomson
INTRODUCTION: The impact of orthodontic treatment on oral health-related quality of life (OHRQoL) in adolescents being treated in orthodontic practices has not yet been explored longitudinally. The aim of this cohort study was to describe the changes in both malocclusion and OHRQoL with orthodontic treatment. METHODS: One hundred seventy-four patients (ages, 10-17 years; 64.4% girls; 81.6% European) underwent 2-arch, fixed-appliance treatment in a 4-year prospective study conducted across 19 specialist orthodontic practices throughout New Zealand...
November 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27867069/statistical-study-on-bracket-debonding-rate-with-the-win-lingual-technique
#20
Laetitia Pau-Bruchet, Christelle Reynes, Robert Sabatier, Catherine Galletti
The aim of this study is to present the results of a statistical inquiry measuring the bracket debonding rate using the WIN lingual technique. This inquiry was performed in the Odontology Unit at the Rothschild Hospital in the framework of the Lingual Orthodontics University Diploma at Paris VII university. Results were gathered by 8 orthodontic practitioners during two years of training from all their patients treated with the WIN lingual technique. The sample study comprised 33 patients treated exclusively with the WIN lingual technique...
December 2016: International Orthodontics
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