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https://read.qxmd.com/read/30786030/multicenter-randomized-crossover-trial-evaluating-the-provox-luna-in-laryngectomized-subjects
#1
Chathura B B Ratnayake, Renske Fles, I Bing Tan, Laura W J Baijens, Walmari Pilz, Cees A Meeuwis, Pauline H E Janssen-van Det, Rob van Son, Michiel W M Van den Brekel
OBJECTIVES: The aim of this study was to compare the relative compliance and the dermatological and pulmonary outcomes when the Provox Luna system (Atos Medical, Malmö, Sweden) is added during the night to the usual tracheastoma care of laryngectomized subjects. METHODS: This was a multicenter randomized crossover trial conducted in the Netherlands Cancer Institute, Erasmus Medical Center, and Maastricht University Medical Center in The Netherlands. The study included 46 laryngectomized subjects with prior heat and moisture exchanger (HME) and adhesive experience...
February 20, 2019: Laryngoscope
https://read.qxmd.com/read/30780299/universal-scaling-of-polygonal-desiccation-crack-patterns
#2
Xiaolei Ma, Janna Lowensohn, Justin C Burton
Polygonal desiccation crack patterns are commonly observed in natural systems. Despite their quotidian nature, it is unclear whether similar crack patterns which span orders of magnitude in length scales share the same underlying physics. In thin films, the characteristic length of polygonal cracks is known to monotonically increase with the film thickness; however, existing theories that consider the mechanical, thermodynamic, hydrodynamic, and statistical properties of cracking often lead to contradictory predictions...
January 2019: Physical Review. E
https://read.qxmd.com/read/30777208/separation-between-the-chest-wall-and-subpleural-lung-lesions-a-two-step-method-to-preoperatively-exclude-invasion-or-focal-pleural-adhesion-by-multidetector-computed-tomography
#3
Mitsuko Tsubamoto, Takahiro Nishida, Naozumi Higaki, Seiji Taniguchi, Tatsuhito Takeshima, Yuichi Sasaki, Takumi Kataoka, Kenji Nishibayashi, Toshiyuki Ikeda
PURPOSE: To develop and assess a non-invasive two-step method for evaluating the relationship between the parietal pleura and peripheral pulmonary lesions to preoperatively exclude invasion or focal pleural adhesion by multidetector computed tomography (CT). METHODS: Twenty-six patients with pulmonary peripheral lesions who underwent surgical lung resection between May and December 2017 were enrolled in this study. Routine CT was performed in the inspiratory phase in the supine position...
March 2019: European Journal of Radiology
https://read.qxmd.com/read/30776991/efficacy-of-dextran-and-peptide-everolimus-bi-directional-stent
#4
So Youn Lee, Eun Jae Jang, In-Ho Bae, Dae Sung Park, Doo Sun Sim, MyungHo Jeong
Everolimus inhibits stent restenosis and the WKYMV (fluorescein isothiocyanate) peptide promotes endothelial homing. Dextran is a natural polymer that is widely used as a pharmaceutical agent. The purpose of this study was to develop a double-drug-coated stent using a bidirectional coating system and to examine the surface shape with in vitro experiments. Stent length was 16 mm and strut thickness was 70 µm (Chonnam National University Hospital Tiger stent). Optical and scanning electron microscopy showed good coating without cracks or bubbles...
February 18, 2019: Journal of Biomaterials Applications
https://read.qxmd.com/read/30775705/the-effects-of-different-desensitizer-agents-on-shear-bond-strength-of-orthodontic-brackets-after-home-bleaching-an-in-vitro-study
#5
Nisa Gül Amuk, Aslı Baysal, Yakup Üstün, Gökmen Kurt
Purpose: The aim of this study was to test the null hypothesis that no difference exists between shear bond strength values of control and bleaching plus desensitizer applied groups. Materials and methods: A hundred freshly extracted human premolar teeth were randomly divided into five groups. Group I served as the control group with no bleaching application, while only bleaching was achieved in Group II. Desensitizer containing potassium nitrate-fluoride and casein phosphopeptide amorphous calcium phosphate were applied in Groups III and IV, after bleaching respectively...
May 2018: European oral research
https://read.qxmd.com/read/30770334/effect-of-different-surface-treatment-on-the-shear-bond-strength-of-metal-brackets-to-bleached-and-desensitized-enamel
#6
Hooman Zarif Najafi, Rafaat Bagheri, Hamid Reza Pakshir, Mohammad Amin Tavakkoli, Sepideh Torkan
INTRODUCTION: The aim of this study was to determine the effect of bleaching and desensitizing on shear bond strength (SBS) of metal brackets to enamel. METHODS: One hundred extracted human premolar were randomly assigned to 5 groups of 20. In the first group (control), no bleaching or desensitizing agent was used. Groups 2 to 5 were bleached with 37.5% hydrogen peroxide and desensitized with 6.0% potassium nitrate. Surface treatment comprised of etching for 15seconds in groups 1, 2 and 3, Er:yag laser irradiation and etching in group 4 and sandblasting and etching in group 5...
February 12, 2019: International Orthodontics
https://read.qxmd.com/read/30769251/development-and-characterization-of-biological-bovine-dentin-posts
#7
Alice Gonçalves Penelas, Eduardo Moreira da Silva, Laiza Tatiana Poskus, Amanda Cypriano Alves, Isis Ingrid Nogueira Simões, Viviane Hass, José Guilherme Antunes Guimarães
This study aimed at evaluating the use of biological dentin post (BDP), achieved by milling bovine root, through the analyses of mechanical and optical properties. BDPs were compared to a glass fiber post (GFP) in the following tests (n = 10): a) elastic modulus (E) and flexural resistance (σ) by three point bending test; b) fracture resistance (FR) by compressive load at 45° and failure pattern; c) light transmitting (LT) ability and their influence on the resin cement's degree of conversion (DC%); d) bond strength (BS) by push-out test and failure pattern...
January 30, 2019: Journal of the Mechanical Behavior of Biomedical Materials
https://read.qxmd.com/read/30765264/laparoscopic-versus-open-adhesiolysis-for-adhesive-small-bowel-obstruction-lasso-an-international-multicentre-randomised-open-label-trial
#8
Ville Sallinen, Salomone Di Saverio, Eija Haukijärvi, Risto Juusela, Heidi Wikström, Vesa Koivukangas, Fausto Catena, Berndt Enholm, Arianna Birindelli, Ari Leppäniemi, Panu Mentula
BACKGROUND: Although laparoscopic adhesiolysis for adhesive small bowel obstruction is being done more frequently, it is not widely accepted due to the lack of supporting evidence of its superiority over an open approach and concerns regarding its benefits. We aimed to investigate whether laparoscopic adhesiolysis was a superior treatment for adhesive small bowel obstruction compared with an open approach in terms of length of postoperative hospital stay and morbidity. METHODS: In this international, multicentre, parallel, open-label trial, we randomly assigned patients (1:1) aged 18-95 years who had adhesive small bowel obstruction that had not resolved with conservative management to have either open or laparoscopic adhesiolysis...
February 11, 2019: Lancet. Gastroenterology & Hepatology
https://read.qxmd.com/read/30762196/influence-of-er-yag-laser-pulse-duration-on-the-long-term-stability-of-organic-matrix-and-resin-dentin-interface
#9
Livia Tosi Trevelin, Beatriz Togoro Ferreira da Silva, Patrícia Moreira de Freitas, Adriana Bona Matos
The purpose of this study was to explore the influence of Er:YAG laser irradiation with different pulse durations on the organic matrix, micromorphology of the hybrid layer (HL), and bond strength over time. Sixty caries-free human molars were cut to obtain flat dentin surfaces which were randomly divided into 4 groups: control (not irradiated-G1) and laser groups (80 mJ/2 Hz) with pulse duration ranging between 50 (G2), 300 (G3), and 600 μs (G4). A self-etch adhesive system (Universal 3M ESPE) was applied on pre-treated dentin surfaces and cylinders of resin composite were built up and stressed in a universal testing machine (μSBS) at 24 h and after12 months (n = 12)...
February 14, 2019: Lasers in Medical Science
https://read.qxmd.com/read/30758409/new-material-perspective-for-endocrown-restorations-effects-on-mechanical-performance-and-fracture-behavior
#10
José Augusto Sedrez-Porto, Eliseu Aldrighi Münchow, Lisia Lorea Valente, Maximiliano Sergio Cenci, Tatiana Pereira-Cenci
The aim of this study was to investigate the mechanical performance and the fracture behavior of endocrown restorations prepared using distinct restorative materials. A total of 42 sound molars with similar crown size and shape were cut at 2 mm above the cementoenamel junction and endodontically treated. They were categorized according to the restorative material used to fabricate endocrown restorations (n=7), namely, conventional composite (Filtek™ Z350 XT), bulk fill composite (Filtek™ Bulk Fill), conventional composite modeled using resin adhesives (SBMP: Scotchbond™ Multipurpose Adhesive; or SBU: Scotchbond™ Universal Adhesive), and IPS e...
February 11, 2019: Brazilian Oral Research
https://read.qxmd.com/read/30756181/different-surface-modifications-combined-with-universal-adhesives-the-impact-on-the-bonding-properties-of-zirconia-to-composite-resin-cement
#11
Nina Lümkemann, Marlis Eichberger, Bogna Stawarczyk
OBJECTIVE: The purpose of this study was to analyze the impact of plasma treatment and (universal adhesives) UAs on the bonding properties of zirconia. MATERIAL AND METHODS: Zirconia specimens (N = 744; n = 186/pretreatment) were prepared, highly polished, and pretreated: (i) plasma (oxygen plasma, 10s, 5 mm), (ii) airborne-particle abrasion (alumina, 50 μm, 0.05 MPa, 5 s, 10 mm), (iii) airborne-particle abrasion + plasma, and (iv) without pretreatment (highly polished surface)...
February 12, 2019: Clinical Oral Investigations
https://read.qxmd.com/read/30745751/an-in-vitro-comparison-of-the-effect-of-various-surface-treatments-on-the-tensile-bond-strength-of-three-different-luting-cement-to-zirconia-copings
#12
B L Bhavana, P L Rupesh, Bharat Kataraki
Aim: The aim of this study was to evaluate and compare the tensile bond strength of zirconia copings subjected to three different surface treatment methods and cemented with three different luting agents. Materials and Methods: Seventy-two extracted maxillary premolar teeth were prepared to receive zirconia copings milled using computer-aided design/computer-aided manufacturing technology, which were divided into 9 groups of 8 specimens each. Three surface treatment protocols such as hydrofluoric acid etch treatment, air abrasion with 110-μm aluminum oxide (Al2 O3 ), and tribochemical silica coating (Rocatec) treatment were carried out, and copings were cemented with three luting agents such as resin-modified glass ionomer cement (RelyX luting 2), 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) resin cement (Panavia F 2...
January 2019: Journal of Indian Prosthodontic Society
https://read.qxmd.com/read/30745748/efficacy-of-prostheses-bonding-using-silane-incorporated-to-universal-adhesives-or-applied-separately-a-systematic-review
#13
REVIEW
Laércio Almeida De Melo, Ilnara De Souza Moura, Erika Oliveira De Almeida, Amilcar Chagas Freitas Junior, Tasiana Guedes De Souza Dias, Fabíola Pessoa Pereira Leite
Currently, the long-term success of esthetic rehabilitation with ceramics is required. Hence, professional knowledge about the most indicated dental material for each clinical situation as well as its usage protocol is essential. The aim of this systematic review of clinical and laboratorial studies was to compare the bond strength of prostheses using silane incorporated to universal adhesives or applied separately. The literature search in databases "Cochrane Library," "MEDLINE," "Web of Science," "Scopus," "LILACS," "Scielo," and "Google Scholar" was based on the keywords "Silane;" "Silanes;" "Silane coupling agent;" "Universal adhesive;" and "Universal adhesives...
January 2019: Journal of Indian Prosthodontic Society
https://read.qxmd.com/read/30745331/interview-with-the-guest-editor-manuel-th%C3%A3-ry
#14
(no author information available yet)
Manuel Théry graduated from the Ecole Supérieure de Physique et Chimie de la ville de Paris (ESPCI-ParisTech) and the University Paris Diderot, France, with a master in physics and biology interfaces and subsequently obtained his PhD working with Michel Bornens on the control of cell polarity through adhesion at the Institut Curie, Paris. He joined the French Alternative Energies and Atomic Energy Commission (CEA) in Grenoble, France, where he set up the 'CytoMorphoLab' together with Laurent Blanchoin. Since 2014, Manuel has directed the Paris unit of this laboratory at the Hôpital Saint Louis, where he investigates the (self-)assembly of the cytoskeleton and how this orchestrates cell geometry and mechanical information in the cell...
February 11, 2019: Journal of Cell Science
https://read.qxmd.com/read/30738850/biological-mechanical-and-adhesive-properties-of-universal-adhesives-containing-zinc-and-copper-nanoparticles
#15
Mario F Gutiérrez, Luisa F Alegría-Acevedo, Luján Méndez-Bauer, Jorge Bermudez, Andrés Dávila-Sánchez, Sonja Buvinic, Nadia Hernández-Moya, Alessandra Reis, Alessandro D Loguercio, Paulo V Farago, Javier Martin, Eduardo Fernández
OBJECTIVES: To evaluate the effect of addition of zinc oxide and copper nanoparticles (ZnO/CuNp) into universal adhesives, on antimicrobial activity (AMA), cytotoxicity (CTX), water sorption (WS) and solubility (SO), microhardness (MH) and in vitro degree of conversion (DC), as well as resin-dentine microtensile bond strength (μTBS), nanoleakage (NL) and in situ DC. METHODS: ZnO/CuNp (0% [control]; 5/0.1 and 5/0.2 wt%) were added in Prime&Bond Active (PBA) and Ambar Universal (AMB)...
February 7, 2019: Journal of Dentistry
https://read.qxmd.com/read/30737914/gram-positive-type-iv-pili-and-competence
#16
Sandra Muschiol, Marie-Stephanie Aschtgen, Priyanka Nannapaneni, Birgitta Henriques-Normark
Type IV pili (T4P) are remarkable bacterial surface appendages that carry out a range of functions. Various types of T4P have been identified in bacteria and archaea, making them almost universal structures in prokaryotes. T4P are best characterized in Gram-negative bacteria, in which pilus biogenesis and T4P-mediated functions have been studied for decades. Recent advances in microbial whole-genome sequencing have provided ample evidence for the existence of T4P also in many Gram-positive species. However, comparatively little is known, and T4P in Gram-positive bacteria are just beginning to be dissected...
January 2019: Microbiology Spectrum
https://read.qxmd.com/read/30717140/flow-cytometry-analysis-of-antibacterial-effects-of-universal-dentin-bonding-agents-on-streptococcus-mutans
#17
Barbara Lapinska, Magdalena Konieczka, Beata Zarzycka, Krzysztof Sokolowski, Janina Grzegorczyk, Monika Lukomska-Szymanska
There is no consensus on the antibacterial activity of dentin bonding systems (DBS). Many study models have been used to evaluate the antimicrobial activity of dental materials. In this study, a novel detection method, flow cytometry, was introduced. It allows for evaluation of the antibacterial activity of DBS, based on assessment of the disruption of the bacterial physical membrane induced by DBS. The aim of the study was to evaluate the antibacterial properties of selected dentin bonding systems against Streptococcus mutans ...
February 1, 2019: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/30714054/adhesion-of-resin-cement-to-dentin-effects-of-adhesive-promoters-immediate-dentin-sealing-strategies-and-surface-conditioning
#18
Carline Rg van den Breemer, Mutlu Özcan, Margot Re Pols, Anique R Postema, Marco S Cune, Marco Mm Gresnigt
PURPOSE: This study evaluated the shear bond strength (SBS) of resin cement to dentin after applying two adhesive (A) systems with a combination of four different immediate dentin sealing (IDS) strategies, and two surface conditioning (SC) methods. MATERIAL AND METHODS: Human third molars (n = 140) were collected and randomly split (n = 70 each) between the two A systems (Clearfil SE Bond; Kuraray [AC] and Optibond FL; Kerr [AO]). The A groups were further divided into four IDS strategies (2 x one adhesive layer (IDS-1L); 2 x two adhesive layers (IDS-2L); 2 x one adhesive layer and one flowable layer (IDS-F); 2 x no adhesive layer (delayed dentin sealing [DDS])...
2019: International Journal of Esthetic Dentistry
https://read.qxmd.com/read/30713171/cement-ah-plus-adhesiveness-assessment-associated-with-mineral-trioxide-aggregate-in-different-proportions-push-out-test
#19
Carlos Am Falcão, Elayne Mo de Lima, José D de M Júnior, Sérgio Ap Freitas, Eduardo S de L Veras, Luana Kb Moura, Lucas F Falcão
AIM: The aim of the study is to evaluate the adhesiveness of the AH Plus plug cement, plus the mineral trioxide aggregate (MTA) in different proportions, through the push-out test. MATERIALS AND METHODS: The authors utilized fifty premolars with a single conduit, which were divided into five groups with 10 teeth. In group 1, the authors performed an obturation with AH Plus cement, group 2 was filled with AH Plus cement with 10% of MTA, group 3 was filled with AH Plus cement plus 20% MTA, group 4 was filled with AH Plus with 30% of MTA and group 5 filling was performed with the MTA Fillapex endodontic cement...
December 1, 2018: Journal of Contemporary Dental Practice
https://read.qxmd.com/read/30711270/effectiveness-of-pre-silanization-in-improving-bond-performance-of-universal-adhesives-or-self-adhesive-resin-cements-to-silica-based-ceramics-chemical-and-in-vitro-evidences
#20
Bingzhuo Chen, Zhicen Lu, Hongliang Meng, Ying Chen, Lu Yang, Huaiqin Zhang, Haifeng Xie, Chen Chen
OBJECTIVES: To examine effectiveness of pre-silanization in improving bond performance of multipurpose products such as universal adhesives or self-adhesive resin cements to silica-based ceramics. METHODS: The present study investigated reactions between silanol groups of γ-methacryloxypropyltrimethoxysilane (γ-MPS) and silica, dehydration self-condensation of γ-MPS, and condensation polymerization between γ-MPS and 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) by using thermodynamic calculations...
January 30, 2019: Dental Materials: Official Publication of the Academy of Dental Materials
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