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https://www.readbyqxmd.com/read/28228539/three-dimensional-printing-spiders-back-and-forth-glue-application-yields-silk-anchorages-with-high-pull-off-resistance-under-varying-loading-situations
#1
Jonas O Wolff, Marie E Herberstein
The anchorage of structures is a crucial element of construction, both for humans and animals. Spiders use adhesive plaques to attach silk threads to substrates. Both biological and artificial adhesive structures usually have an optimal loading angle, and are prone to varying loading situations. Silk anchorages, however, must cope with loading in highly variable directions. Here we show that the detachment forces of thread anchorages of orb-web spiders are highly robust against pulling in different directions...
February 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28215114/arthroscopic-extended-rotator-interval-release-for-treating-refractory-adhesive-capsulitis
#2
Ming-Jr Tsai, Wei-Pin Ho, Chih-Hwa Chen, Tsai-Hsueh Leu, Tai-Yuan Chuang
PURPOSE: To present the clinical results of arthroscopic extended rotator interval release with a stretching program for treating refractory adhesive capsulitis. STUDY DESIGN: Case series; level of evidence, 4. METHODS: Arthroscopy-assisted extended rotator interval tissue release including anterior capsular was performed in 26 patients with refractory adhesive capsulitis. All rotator interval tissues, except the medial sling of the biceps, were excised and the excursion of the subscapularis tendon was restored and freely mobilized...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28214537/biomechanical-behavior-of-endodontically-treated-premolars-using-different-preparation-designs-and-cad-cam-materials
#3
Diogo Pedrollo Lise, Annelies Van Ende, Jan De Munck, Thaís Yumi Umeda Suzuki, Luiz Clovis Cardoso Vieira, Bart Van Meerbeek
OBJECTIVES: To evaluate the effect of restoration design ('2.5-mm deep endocrown', '5-mm deep endocrown' or '5-mm deep post&crown') and CAD/CAM material type (composite or lithium disilicate glass-ceramic) on the load-to-failure of endodontically treated premolars in absence of any ferrule. METHODS: The crowns of 48 single-rooted premolars were cut and the roots were endodontically treated. Teeth were randomly divided into six groups (n=8); teeth in each group were restored using one of the two tested materials with standardized CAD/CAM fabricated endocrowns (with either 2...
February 15, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28210433/effect-of-adhesive-layers-on-microshear-bond-strength-of-nanocomposite-resin-to-dentin
#4
Nayef H Felemban, Mohamed I Ebrahim
BACKGROUND: Bond strength of adhesive layer can absorb unwanted stresses of polymerization shrinkage in composite resin restorations; increased microshear bond strength can prevent failure of restoration materials, the purpose of this study was to evaluate the effect of adhesive layers on microshear bond strength of nanocomposite resin to dentin. MATERIAL AND METHODS: Two different types of adhesive systems: universal adhesive (ExciTE) and newly developed adhesive (Nano-Bond), and one type of light-cured resin restorative material (Nanocomposite resin) were used in this study...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28203013/-curing-mode-of-universal-adhesives-affects-the-bond-strength-of-resin-cements-to-dentin
#5
Z R Fu, F C Tian, L Zhang, B Han, X Y Wang
OBJECTIVE: To determine the effects of curing mode of one-step and two-step universal adhesives on the micro-tensile bond strength (μTBS) of different dual-cure resin cements to dentin. METHODS: One-step universal adhesive Single Bond Universal (SBU), and two-step universal adhesive OptiBond Versa (VSA) were chosen as the subjects, one-step self-etching adhesive OptiBond All in One (AIO) and two-step self-etching adhesive Clearfil SE Bond (SEB) were control groups, and two dual-cure resin cements RelyX Ultimate (RLX) and Nexus 3 Universal (NX3) were used in this study...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28197397/timing-considerations-on-the-shear-bond-strength-of-orthodontic-brackets-after-topical-fluoride-varnish-applications
#6
Gianguido Cossellu, Valentina Lanteri, Andrea Butera, Nicola Laffi, Alberto Merlini, Giampietro Farronato
OBJECTIVES: To assess the best temporal association between the application of a fluoride varnish on enamel and bonding procedures. MATERIALS AND METHODS: Eighty mandibular bovine incisors were used. Teeth were divided into 4 groups (20 per group); Groups 1-3 were treated with fluoride varnish (Fluor Protector, Ivoclar Vivadent, Schaan, Liechtenstein), and Group 4 served as control with no pretreatment. Tooth were stored in deionized water (37°C) and subjected to thermal cycling for 400 (Group 1), 800 (Group 2), and 2500 (Group 3) cycles corresponding, respectively, to 15, 30, and 90 days in order to simulate the three different timing of bracket bonding...
January 2017: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/28195274/role-of-etching-mode-on-bonding-longevity-of-a-universal-adhesive-to-eroded-dentin
#7
Tamires Vercelino Forgerini, Jéssica Fogliato Ribeiro, Rachel de Oliveira Rocha, Fabio Zovico Maxnuck Soares, Tathiane Larissa Lenzi
PURPOSE: To assess the immediate and six-month microshear bond strength (μSBS) of a universal adhesive applied using different etching strategies on sound and eroded dentin. MATERIALS AND METHODS: Eighty bovine incisors were polished to obtain flat buccal dentin. Forty teeth were submitted to a pH-cycling model to simulate artificial erosion (3x/day cola drink for 7 days). Teeth from both dentin conditions (sound and eroded) were randomly assigned to four groups according to the adhesive and etching approach: a universal adhesive in self-etch and etch-and-rinse modes (Scotchbond Universal Adhesive), and as controls a twostep etch-and-rinse adhesive (Adper Single Bond Plus), and a two-step self-etch adhesive (Clearfil SE Bond)...
February 10, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28194358/effect-of-adhesive-luting-on-the-fracture-resistance-of-zirconia-compared-to-that-of-composite-resin-and-lithium-disilicate-glass-ceramic
#8
Myung-Jin Lim, Kwang-Won Lee
OBJECTIVES: The purpose of this study was to evaluate the effect of adhesive luting on the fracture resistance of zirconia compared to that of a composite resin and a lithium disilicate glass ceramic. MATERIALS AND METHODS: The specimens (dimension: 2 mm × 2 mm × 25 mm) of the composite resin, lithium disilicate glass ceramic, and yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) were prepared. These were then divided into nine groups: three non-luting groups, three non-adhesive luting groups, and three adhesive luting groups, for each restorative material...
February 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28185696/mediterranean-diet-adherence-by-patients-with-primary-open-angle-glaucoma
#9
J A Abreu-Reyes, D Álvarez-Luis, V Arteaga-Hernández, M Sánchez-Mendez, R Abreu-González
OBJECTIVE: To study the adherence to the Mediterranean diet in patients affected by primary open angle glaucoma (POAG). MATERIALS AND METHODS: An observational study was conducted to assess the adherence to the Mediterranean diet in patients affected by POAG, and who attended the Ophthalmology Department of the Canary Islands University Hospital. The study included completing a 14-item questionnaire validated by the PREDIMED Study, in person or by telephone. RESULTS: A total of 100 questionnaires were completed successfully by 50 males and 50 females...
February 6, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28179197/laparoendoscopic-single-site-total-laparoscopic-hysterectomy-clinical-factors-that-affect-operative-times-and-techniques-to-overcome-difficulties
#10
In Cheul Jeung, Yong Seok Lee, Min Jong Song, Eun Kyung Park
STUDY OBJECTIVE: To compare surgical outcomes of patients who underwent laparoendoscopic single-site total laparoscopic hysterectomy (LESS-TLH) with operative times <150 minutes and ≥150 minutes to determine the clinical factors that influence operative times. We also describe techniques that help overcome difficulties involved in this procedure. DESIGN: Retrospective study. DESIGN: Classification: Canadian Task Force Classification II-2...
February 4, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28174007/comparative-analysis-of-the-mechanical-properties-of-fiber-and-stainless-steel-multistranded-wires-used-for-lingual-fixed-retention
#11
O Annousaki, S Zinelis, G Eliades, T Eliades
OBJECTIVE: To evaluate the effect of different resins used for the co-polymerization of EverStick fiber-reinforced fixed orthodontic retainer on its mechanical properties and to compare the mechanical properties of these configurations to commonly used multistrand wires. MATERIALS AND METHODS: Ten 0.0175-in. WildCat (WC175), ten 0.0215-in. WildCat (WC215) three-strand twisted wires and thirty EverStick fibers were tested in this study. The EverStcik fibers were equally shared in three groups (n=10)...
February 4, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28161895/comparative-study-of-dental-enamel-loss-after-debonding-braces-by-analytical-scanning-electron-microscopy-sem
#12
Jacqueline Adelina Rodríguez-Chávez, Jesús Arenas-Alatorre, Irma Araceli Belio-Reyes
Clinical procedures when shear forces are applied to brackets suggest adhesion forces between 2.8 and 10.0 MPa as appropriate. In this study dental enamel was evaluated by scanning electron microscopy (SEM) before and after removing the brackets. Thirty bicuspids (previous prophylaxis) with metallic brackets (Roth Inovation 0.022 GAC), Transbond Plus SEP 3M Unitek adhesive and Transbond XT 3M resin were used. The samples were preserved to 37°C during 24 hr and submited to tangential forces with the Instron Universal machine 1...
February 5, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28160521/urologic-injuries-during-gynecologic-surgery-a-10-year-review
#13
Sikarn Satitniramai, Jittima Manonai
AIMS: The study was conducted to evaluate the incidence of urologic injuries during gynecologic surgery, study the management and outcome of such injuries, and identify risk factors that may be associated with urologic injuries. METHODS: A case-control study was conducted in patients who underwent gynecologic surgery from 2005 to 2014 in the university hospital. The study cases referred to patients who had urologic injury during gynecologic surgery and the control cases referred to patients who had gynecologic surgery matching the same period, type of procedure, and etiological disease leading to surgery...
February 4, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28149471/bond-strength-of-adhesive-resin-cement-with-different-adhesive-systems
#14
Fabrizio Lorenzoni E Silva, Saulo Pamato, Milton-Carlos Kuga, Marcus-Vinicius-Reis Só, Jefferson-Ricardo Pereira
BACKGROUND: To assess the immediate bond strength of a dual-cure adhesive resin cement to the hybridized dentin with different bonding systems. MATERIAL AND METHODS: Fifty-six healthy human molars were randomly divided into 7 groups (n=8). After 3 longitudinal sections, the central cuts were included in PVC matrix and were submitted to dentin hybridization according to the groups: G1 - etch & rinse system with 3-step (Apder™ Scotchbond™ Multi-Purpose, 3M ESPE), G2 - etch & rinse system with 3-step (Optibond™ FL, Kerr), G3 - etch & rinse system with 3-step (All-Bond 3®, Bisco), G4 - etch & rinse simplified system (Adper™ Single Bond 2, 3M ESPE), G5 - self-etching system with one step (Bond Force, Tokuyama), G6 - universal system in moist dentin (Single Bond Universal, 3M ESPE), G7 - universal system in dry dentin (Single Bond Universal, 3M ESPE)...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28149468/effect-of-water-storage-on-ultimate-tensile-strength-and-mass-changes-of-universal-adhesives
#15
Nazanin Bahrololumi, Amirreza Beglou, Ahmad Najafi-Abrandabadi, Alireza Sadr, Seyedeh-Mahsa Sheikh-Al-Eslamian, Amir Ghasemi
BACKGROUND: The aim of the present study was to evaluate the influence of water storage on micro tensile strength (µTS) and mass changes (MC) of two universal adhesives. MATERIAL AND METHODS: 10 disk-shaped specimens were prepared for each adhesive; Scotchbond Universal (SCU) All-Bond Universal (ABU) and Adper Single Bond 2 (SB2). At the baseline and after 1 day and 28 days of water storage, their mass were measured and compared to estimate water sorption and solubility...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28149465/citotoxicity-evaluation-of-three-dental-adhesives-on-vero-cells-in-vitro
#16
Raisa-Queiroz Catunda, Jeymesson-Raphael-Cardoso Vieira, Erwelly-Barros de Oliveira, Eliete-Cavalcanti da Silva, Veruska-Lima-Moura Brasil, Danyel-Elias-da Cruz Perez
BACKGROUND: To evaluate, in vitro, the potential cytotoxicity of three different dental adhesives systems (Adper Single Bond 2 -SB, Silorane System Adhesive Bond -SSAB and Single Bond Universal -SBU) on cultivated Vero cells after different contact times. MATERIAL AND METHODS: The cells were cultured in a concentration of 2 x 105 cells/mL for 24h and grown to sub-confluent monolayers. VERO cells were exposed to 25µl of conditioned extracts obtained from 24h, 48h and 72h immersion of adhesive samples in culture medium (DMEM), immediately after polymerization...
January 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28128086/vesicular-contact-reaction-may-progress-into-erythema-multiforme
#17
Magdalena Czarnecka-Operacz, Dorota Jenerowicz, Joanna Szulczyńska-Gabor, Ewa Teresiak-Mikołajczak, Joanna Szyfter-Harris, Monika Bowszyc-Dmochowska
Dear Editor, Erythema multiforme is considered an acute skin condition, characterized by a self-limiting and sometimes recurrent course. It is regarded as a type IV hypersensitivity reaction associated with certain infections, medications, and other various triggers. Allergic contact dermatitis is in turn a delayed type of induced allergy as a result of cutaneous contact with a specific allergen to which the patient develops specific sensitivity. This type of cutaneous reaction is associated with inflammation manifesting with erythema, edema, and vesicles...
December 2016: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28127332/effect-of-addition-of-curcumin-nanoparticles-on-antimicrobial-property-and-shear-bond-strength-of-orthodontic-composite-to-bovine-enamel
#18
Ahmad Sodagar, Abbas Bahador, Maryam Pourhajibagher, Badreddin Ahmadi, Pedram Baghaeian
OBJECTIVES: This study sought to assess the effect of curcumin nanoparticles (curcNPs) on antimicrobial property and shear bond strength (SBS) of orthodontic composite to bovine enamel. MATERIALS AND METHODS: In this in vitro, experimental study, 1%, 5% and 10% curcNPs were added to Transbond XT composite. Stainless steel brackets were bonded to 48 sound bovine incisors in four groups (n=12) using composite containing 0% (control), 1%, 5% and 10% curcNPs. The bracket-tooth SBS was measured by a universal testing machine...
September 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28120710/the-role-of-universal-stress-proteins-in-bacterial-infections
#19
Andrew O Connor, Siobhán McClean
Universal stress proteins are ubiquitously expressed in bacteria, archaea and plants and other eukaryotes. A general property of USPs is their role in adaptation of bacteria to oxidative stress, high temperature, low pH and/or hypoxia. There is increasing evidence that these proteins facilitate the adaption of bacterial pathogens to the human host environment, thereby facilitating colonisation and pathogenicity. USPs in Mycobacterium tuberculosis are well studied and may play a role in latency of tuberculosis...
January 24, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28118539/bioinspired-universal-monolayer-coatings-by-combining-concepts-from-blood-protein-adsorption-and-mussel-adhesion
#20
Leixiao Yu, Chong Cheng, Qidi Ran, Christoph Schlaich, Paul-Ludwig Michael Noeske, Wenzhong Li, Qiang Wei, Rainer Haag
Despite the increasing need for universal polymer coating strategies, only a few approaches have been successfully developed and most of them are suffering from color, high thickness, or high roughness. In this paper, we present for the first time a universal monolayer coating that is only a few nanometers-thick and independent of the composition, size, shape, and structure of the substrate. The coating is based on a bioinspired synthetic amphiphilic block copolymer that combines two concepts from blood protein adsorption and mussel adhesion...
January 24, 2017: ACS Applied Materials & Interfaces
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