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https://www.readbyqxmd.com/read/30446126/hydrophobization-of-chitosan-films-by-surface-grafting-with-fluorinated-polymer-brushes
#1
Bénédicte Lepoittevin, Tamara Elzein, Diana Dragoe, Alice Bejjani, Frédéric Lemée, Jocelyne Levillain, Philippe Bazin, Philippe Roger, Isabelle Dez
Chitosan with its surface-properties and biodegradability is a promising biomaterial for green packaging applications. Till now, this application is still limited due to chitosan high sensitivity to water. Some existing studies deal with the incorporation of hydrophobic additives to enhance water-proof performances of chitosan films. As these additives may impair the film properties, our study focuses on chitosan efficient hydrophobization by means of simple and successful surface grafting reactions. Chitosan films prepared by solvent casting were modified by means of surface-initiated activators regenerated by electron transfer atom radical polymerization (SI-ARGET-ATRP) of 2-hydroxyethyl methacrylate (HEMA) followed by esterification reaction with fluorinated acyl compound...
February 1, 2019: Carbohydrate Polymers
https://www.readbyqxmd.com/read/30295168/total-contact-casting-versus-traditional-dressing-in-diabetic-foot-ulcers
#2
Biswajit Sahu, Alok Prusty, Barsha Tudu
This study compared the treatment of total contact casting (TCC) with traditional dressing treatment (TD) in the management of neuropathic diabetic plantar ulcers. Thirty-one patients with plantar ulcers without any gross infection, osteomyelitis or gangrene were randomly assigned to the TCC group (n = 15) or TD group (n = 16). In the experimental group, TCC was applied on the initial visit and subjects were instructed to limit ambulation to one-third of their usual activity. Subjects in the control group (TD) were prescribed dressing changes and were advised against bearing weight on the involved extremity...
May 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/30129304/-new-progress-in-the-treatment-of-chronic-wound-of-diabetic-foot
#3
Jiangning Wang, Lei Gao
Diabetic foot is one of the serious complications of diabetic patients. It is caused by diabetes combined with different degrees of lower extremity vascular lesions and neuropathy, and the wound can not heal for a long time. The serious results can cause bone marrow infection, bone destruction, and have high disability and death rate. At present, there are various treatment methods for diabetic foot chronic wound. On the basis of internal medicine controlling blood sugar, anti infection, lowering blood lipid, improving microcirculation and nourishment nerve, the surgical method is adopted, including the debridement of the necrosis in a short time to prevent the infection from spreading; maggot biological debridement and ozone chemical debridement will promote the growth of granulation tissue while controlling infection...
July 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29982022/bifunctional-supported-ionic-liquid-based-smart-films-for-dyes-adsorption-and-photodegradation
#4
Meng Dang, Qi-Liang Deng, Guo-Zhen Fang, Dong-Dong Zhang, Hai-Jie Li, Jing-Min Liu, Shuo Wang
Herein, novel bifunctional smart films containing poly(styrene-butyl acrylate-ionic liquids) (P(S-BA-ILs)) and TiO2 were first prepared by a simple cast method and then used to demonstrate a superior bifunction of adsorption/desorption for dyes due to the property of reversible wettability switching and photodegradation under ultraviolet (UV) irradiation due to the addition of TiO2 . The glass transition temperature (Tg) of P(S-BA-ILs) latex was characterized using a differential scanning calorimeter (DSC)...
November 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29959016/physical-antibacterial-and-antioxidant-properties-of-chitosan-films-containing-hardleaf-oatchestnut-starch-and-litsea-cubeba-oil
#5
Kewang Zheng, Wei Li, Boqiao Fu, Meifang Fu, Qiaolin Ren, Fan Yang, Caiqin Qin
More and more attention was attached to food safety, it is necessary to endow food packaging films with good antibacterial and antioxidant properties Edible films based on chitosan (CH), hardleaf oatchestnut starch (HOS) and Litsea cubeba oil (LEO) were prepared by solution casting. The properties and structures of the blend film with different proportion (xCH/yHOS) were evaluated. The CH-HOS films were firstly prepared by blending CH solution with HOS paste. The tensile strength (TS) and DPPH radical scavenging ability of CH-HOS films increased from 27...
October 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29957314/comparative-assessment-of-treatment-efficacy-and-adverse-effects-during-nonextraction-orthodontic-treatment-of-class-i-malocclusion-patients-with-direct-and-indirect-bonding-a-parallel-randomized-clinical-trial
#6
RANDOMIZED CONTROLLED TRIAL
Kübra Yıldırım, Banu Saglam-Aydinatay
INTRODUCTION: The objective of this 2-arm parallel trial was to compare the effects of direct and indirect bonding techniques on the orthodontic treatment process and outcomes. METHODS: Thirty patients were randomly assigned to undergo bonding of brackets indirectly (group A, n = 15) or directly (group B, n = 15). Eligibility criteria included permanent dentition with bilateral Angle Class I molar and canine relationships, no previous orthodontic treatment, no skeletal discrepancy, and mild or moderate crowding...
July 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29951266/new-trends-in-the-orthopaedic-management-of-diabetic-foot
#7
Önder I Kılıçoğlu, Mehmet Demirel, Şamil Aktaş
Although there are various types of therapeutic footwear currently used to treat diabetic foot ulcers (DFUs), recent literature has enforced the concept that total-contact casts are the benchmark.Besides conventional clinical tests and imaging modalities, advanced MRI techniques and high-sensitivity nuclear medicine modalities present several advantages for the investigation of diabetic foot problems.The currently accepted principles of DFU care are rigorous debridement followed by modern wound dressings to provide a moist wound environment...
May 2018: EFORT open reviews
https://www.readbyqxmd.com/read/29890399/effect-of-different-casting-design-characteristics-on-offloading-the-diabetic-foot
#8
Manon Westra, Jaap J van Netten, Hendrik A Manning, Jeff G van Baal, Sicco A Bus
BACKGROUND: Non-removable knee-high devices, such as a total contact cast (TCC), are recommended for offloading diabetic plantar forefoot ulcers. However, it is insufficiently known how each of the different design characteristics of these devices contribute to offloading the diabetic foot. RESEARCH QUESTION: What is the offloading effect of the different design characteristics that make up a non-removable knee-high cast for people with diabetes and active or previous plantar forefoot ulcers? METHODS: Sixteen persons with diabetes, peripheral neuropathy and a healed or active plantar forefoot ulcer had their plantar pressures measured during walking in a non-removable knee-high device (TCC), in that device made removable (BTCC), in that device made below-ankle (cast shoe), in that cast shoe worn with a different walking sole and in a newly made cast shoe without a custom-moulded foot-device interface...
July 2018: Gait & Posture
https://www.readbyqxmd.com/read/29752120/effects-of-printing-induced-interfaces-on-localized-strain-within-3d-printed-hydrogel-structures
#9
Kyle Christensen, Brian Davis, Yifei Jin, Yong Huang
Additive manufacturing, or 3D printing, is a promising approach for the fabrication of biological structures for regenerative medicine applications using tissue-like materials such as hydrogels. Herein, inkjet printing is implemented as a model droplet-based 3D printing technology for which interfaces have been shown to form between printed lines within printed layers of hydrogel structures. Experimental samples with interfaces in two orientations are fabricated by inkjet printing and control samples with and without interfaces are fabricated by extrusion printing and casting, respectively...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29714326/compensating-additional-optical-power-in-the-central-zone-of-a-multifocal-contact-lens-forminimization-of-the-shrinkage-error-of-the-shell-mold-in-the-injection-molding-process
#10
Lien T Vu, Chao-Chang A Chen, Chia-Cheng Lee, Chia-Wei Yu
This study aims to develop a compensating method to minimize the shrinkage error of the shell mold (SM) in the injection molding (IM) process to obtain uniform optical power in the central optical zone of soft axial symmetric multifocal contact lenses (CL). The Z-shrinkage error along the Z axis or axial axis of the anterior SM corresponding to the anterior surface of a dry contact lens in the IM process can be minimized by optimizing IM process parameters and then by compensating for additional (Add) powers in the central zone of the original lens design...
April 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29669951/accuracy-of-digital-models-generated-by-conventional-impression-plaster-model-methods-and-intraoral-scanning
#11
Yuki Tomita, Jun Uechi, Masahiro Konno, Saera Sasamoto, Masahiro Iijima, Itaru Mizoguchi
We compared the accuracy of digital models generated by desktop-scanning of conventional impression/plaster models versus intraoral scanning. Eight ceramic spheres were attached to the buccal molar regions of dental epoxy models, and reference linear-distance measurement were determined using a contact-type coordinate measuring instrument. Alginate (AI group) and silicone (SI group) impressions were taken and converted into cast models using dental stone; the models were scanned using desktop scanner. As an alternative, intraoral scans were taken using an intraoral scanner, and digital models were generated from these scans (IOS group)...
July 29, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29624627/influence-of-iatrogenic-gaps-cement-type-and-time-on-microleakage-of-cast-posts-using-spectrophotometer-and-glucose-filtration-measurements
#12
Ebtissam M Al-Madi, Samar A Al-Saleh, Reem I Al-Khudairy, Taibah W Aba-Hussein
PURPOSE: To determine the influence of iatrogenic gaps, type of cement, and time on microleakage of cast posts using spectrophotometer and glucose filtration measurements. MATERIALS AND METHODS: Forty-eight single-rooted teeth were divided into eight groups of six teeth each. Teeth were instrumented and obturated, and a cast post was fabricated. In addition to two control groups (positive and negative), a total of six groups were prepared: In four groups, an artificial 2- to 3-mm gap was created between post and residual gutta percha (GP), and two groups were prepared with intimate contact between post and residual GP...
November 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29526300/defining-centric-relation
#13
Jonathan P Wiens, Gary R Goldstein, Mark Andrawis, Mijin Choi, Jennifer W Priebe
STATEMENT OF PROBLEM: Multiple definitions of centric relation (CR) have evolved over time that may have created confusion or impeded understanding. A recent attempt to achieve a singular definition by surveying the members of the Academy of Prosthodontics (AP) did not achieve majority consensus. PURPOSE: The purpose of this study was to identify those aspects or attributes within the existing definitions of CR in which there was agreement or disagreement among the members of the AP...
July 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29481330/total-contact-cast-use-in-patients-with-peripheral-arterial-disease-a-case-series-and-systematic-review
#14
Anthony Tickner, Cheri Klinghard, Jonathan F Arnold, Valerie Marmolejo
INTRODUCTION: As the majority of diabetic foot ulcerations (DFUs) occur on the plantar foot, excessive pressure is a major contributing factor to delayed healing. The gold standard for offloading is the total contact cast (TCC); yet, TCC use is contraindicated in patients with ischemia. Lower extremity ischemia typically presents in the more severe end stages of peripheral arterial disease (PAD). As PAD exists on a severity spectrum from mild to severe, designation of a clear cutoff where TCC use is an absolute contraindication would assist those who treat DFUs on a daily basis...
February 2018: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/29284952/an-evaluation-of-the-effect-of-various-gloves-on-polymerization-inhibition-of-elastomeric-impression-materials-an-in-vitro-study
#15
Vinuta Hiremath, G Vinayakumar, Mallikarjuna Ragher, Sounyala Rayannavar, Mahantesh Bembalagi, B L Ashwini
Background: Latex protective barriers such as gloves and rubber dam material have been used widely in restorative procedures for crown and bridge. However, the chemical used during latex glove fabrication is thought to inhibit the polymerization of elastomeric impression materials used for impression making which has a detrimental effect on the dimensional accuracy and surface definition of resultant casts used for restorative procedures. The objectives of the study were to examine the surface of different elastomeric impressions on contact with various gloves...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29261853/metal-free-materials-for-fixed-prosthodontic-restorations
#16
REVIEW
Carlo E Poggio, Carlo Ercoli, Lorena Rispoli, Carlo Maiorana, Marco Esposito
BACKGROUND: Fixed prosthodontic treatment (crowns, fixed dental prostheses (FDPs), complete arch prostheses) involves the use of several different materials to replace missing tooth structure. Traditionally full metal or metal frameworks veneered with ceramic (metal-ceramic (MC)) have been used. In recent years several different metal-free systems have become available to clinicians and patients. In general, metal-free restorations should allow practitioners to better reproduce natural tooth colour, avoiding shortcomings of MC restorations...
December 20, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29184753/tissue-augmentation-with-allograft-adipose-matrix-for-the-diabetic-foot-in-remission
#17
Tala B Shahin, Kairavi V Vaishnav, Marcy Watchman, Vignesh Subbian, Ethan Larson, Evangelia Chnari, David G Armstrong
Background: Repetitive stress on the neuropathic plantar foot is the primary cause of diabetic foot ulcers. After healing, recurrence is common. Modulating plantar pressure has been associated with extension of ulcer free days. Therefore, the goal of this study was to determine the effects of an injectable allograft adipose matrix in providing a protective padding and reducing the pressure in the plantar foot. Methods: After healing his recurrent ulcer using total contact casting, a 71-year-old man with a 9-year history of recurrent diabetic foot ulcers was treated with injection of allograft adipose matrix, procured from donated human tissue...
October 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29067267/diabetic-osteoarthropathy-care-in-sweden-need-for-improvement-a-national-inventory
#18
Linda Wennberg, Paul Lundgren, Rimma Axelsson, Peter Aspelin, Kurt Gerok-Andersson, Börje Åkerlund
AIMS: Osteoarthropathy, a rare foot complication in patients with diabetes mellitus, calls for immediate and optimal management to prevent irreversible bone/joint destruction and risk of amputation. Awareness of the condition and adequate guidelines would minimize the consequences and the costs, both for the patient and for the society. We investigated the diabetic osteoarthropathy care in Swedish orthopedic clinics. METHODS: A questionnaire was distributed to 63 Swedish hospitals with emergency department for orthopedic patients...
September 2017: Journal of Clinical & Translational Endocrinology
https://www.readbyqxmd.com/read/29027851/treatment-of-diabetic-foot-ulcers-with-dehydrated-amniotic-membrane-allograft-a-prospective-case-series
#19
R J Abdo
OBJECTIVE: A diabetic foot ulcer (DFU) is one of the many potential complications associated with diabetes. If not effectively and rapidly treated, DFUs can result in lower extremity amputations. This prospective case series aimed to assess the effectiveness of a dehydrated amniotic-derived tissue allograft (DAMA), with regards to time to wound closure and total number of applications. METHOD: Patients were recruited with a neuropathic non-healing DFU(s) despite standard care for at least 4 weeks before the study...
July 1, 2016: Journal of Wound Care
https://www.readbyqxmd.com/read/28989556/fibreglass-total-contact-casting-removable-cast-walkers-and-irremovable-cast-walkers-to-treat-diabetic-neuropathic-foot-ulcers-a-health-technology-assessment
#20
(no author information available yet)
BACKGROUND: Diabetic neuropathic foot ulcers are a risk factor for lower leg amputation. Many experts recommend offloading with fibreglass total contact casting, removable cast walkers, and irremovable cast walkers as a way to treat these ulcers. METHODS: We completed a health technology assessment, which included an evaluation of clinical benefits and harms, value for money, and patient preferences for offloading devices. We performed a systematic literature search on August 17, 2016, to identify randomized controlled trials that compared fibreglass total contact casting, removable cast walkers, and irremovable cast walkers with other treatments (offloading or non-offloading) in patients with diabetic neuropathic foot ulcers...
2017: Ontario Health Technology Assessment Series
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