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methacryl nose

Shijiao Han, Jiang Cheng, Huidong Fan, Junsheng Yu, Lu Li
High-response organic field-effect transistor (OFET)-based NO₂ sensors were fabricated using the synergistic effect the synergistic effect of zinc oxide/poly(methyl methacrylate) (ZnO/PMMA) hybrid dielectric and CuPc/Pentacene heterojunction. Compared with the OFET sensors without synergistic effect, the fabricated OFET sensors showed a remarkable shift of saturation current, field-effect mobility and threshold voltage when exposed to various concentrations of NO₂ analyte. Moreover, after being stored in atmosphere for 30 days, the variation of saturation current increased more than 10 folds at 0...
October 21, 2016: Sensors
Francisco N Fonseca, Andresa H Betti, Flávia C Carvalho, Maria P D Gremião, Frantiescoli A Dimer, Sílvia S Guterres, Marli L Tebaldi, Stela M K Rates, Adriana R Pohlmann
Nose-to-brain drug delivery has been proposed to overcome the low absorption of drugs in central nervous system due to the absence of brain-blood barrier in the olfactory nerve pathway. However, the presence of a mucus layer and quick clearance limit the use of this route. Herein, amphiphilic methacrylic copolymer-functionalized poly(ε-caprolactone) nanocapsules were proposed as a mucoadhesive system to deliver olanzapine after intranasal administration. In vitro evaluations showed that these nanocapsules were able to interact with mucin (up to 17% of increment in particle size and 30% of reduction of particle concentration) and nasal mucosa (2-fold higher force for detaching), as well as to increase the retention of olanzapine (about 40%) on the nasal mucosa after continuous wash...
August 2015: Journal of Biomedical Nanotechnology
A Muttray, J Gosepath, J Brieger, A Faldum, C Zagar, O Mayer-Popken, D Jung, B Roßbach, W Mann, S Letzel
PURPOSE: The German MAK value of methyl methacrylate has been fixed at 50 ppm. The aim of this study was to evaluate possible acute effects of an exposure to 50 ppm methyl methacrylate on the upper airways of human subjects. METHODS: Twenty healthy subjects were exposed to 50 ppm methyl methacrylate and to air (sham) in an exposure chamber for 4 h according to a crossover design. Symptoms were assessed by the SPES questionnaire. Olfactory thresholds for n-butanol and mucociliary transport time were measured before and after exposure...
November 2015: International Archives of Occupational and Environmental Health
Liang Chen, Shi-Rong Li, Pan Yu, Zhen-Xiang Wang
PURPOSE: Dermal fillers have been proven to be safe in soft tissue augmentation; however, their efficacy in modeling the noses of Asian patients has not been demonstrated. METHODS: In this study, 378 patients were included and underwent augmentation rhinoplasty (Artecoll, n=126; Restylane, n=126 and silicone implants, n=126). The subjective and objective outcomes were evaluated on day 1, and months 1, 3, 6, and 12 after injection rhinoplasty. RESULTS: All patients achieved significant improvement in nasal shape and contour immediately after surgery...
August 1, 2014: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
Laura M Thoma, Blaise R Boles, Kenichi Kuroda
The in vitro and in vivo antimicrobial activity of primary ammonium ethyl methacrylate homopolymers (AEMPs) was investigated. AEMPs with different degrees of polymerization (DP = 7.7-12) were prepared by reversible addition-fragmentation chain-transfer (RAFT) polymerization. The AEMPs showed higher inhibitory effects against Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA), than Gram-negative bacteria. The AEMPs also showed potent anti-S. aureus activity in the presence of fetal bovine serum, whereas the activity of the antibiotic mupirocin was reduced under the same conditions...
August 11, 2014: Biomacromolecules
Sung-Ae Park, Sugyeong Gwak, Sangjun Choi
OBJECTIVES: This study aimed to evaluate occupational symptoms and chemical exposures of nail salon technicians. METHODS: Work-related symptoms of nail salon technicians in Daegu City were surveyed using a researcher-administered questionnaire, and responses were compared to those of non-exposed office workers as controls. Personal exposure level of airborne volatile organic compounds was also monitored using passive samplers. RESULTS: A total of 159 subjects in 120 salons were interviewed...
May 2014: Journal of Preventive Medicine and Public Health, Yebang Ŭihakhoe Chi
Santiago Costa-Palau, Josep Torrents-Nicolas, Magi Brufau-de Barberà, Josep Cabratosa-Termes
To treat a patient who needed a replacement for a maxillary obturator prosthesis, a new obturator prosthesis was fabricated from polyetheretherketone (PEEK), a material often used in medicine but seldom in dentistry. This material provided the patient with a better-adjusted, more functional, and lighter prosthesis.
September 2014: Journal of Prosthetic Dentistry
Alexander Rivkin
BACKGROUND: Nonsurgical rhinoplasty involves the use of injectable fillers to improve the contours of the nose. It has become a widely practiced procedure since this author first popularized it in 2003. The use of permanent fillers in nonsurgical rhinoplasty has not been well documented, especially in this country. OBJECTIVES: To demonstrate the safety and effectiveness of a polymethylmethacrylate (PMMA)-based filler for nonsurgical rhinoplasty. METHODS AND MATERIALS: Eligible subjects underwent up to three injection sessions with a commercially available PMMA product and were followed for 1 year...
March 2014: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
M Kezban Gurbuz, Tolgahan Çatli, Cemal Cingi, Aytekin Yaz, Cengiz Bal
Occupational diseases are primarily considered to be important health problems for individuals with occupations in heavy industry fields. Although dentists work in very clean and elegant offices, they are frequently exposed to various chemicals and high-intensity, sound-producing instruments, such as compressors and aerators. In our study, we aimed to investigate the risk for occupational hearing loss of dental personnel, by performing pure-tone audiometry in 40 dentists and comparing the results with those of healthy individuals...
November 2013: Journal of Craniofacial Surgery
Hiroyoshi Ninomiya, Emi Imamura, Tomo Inomata
OBJECTIVE: To examine the blood supply to the eyes of bottlenose dolphin (Tursiops truncatus), spotted seal (Phoca largha), and California sea lion (Zalophus californianus). Emphasis is placed on exploring the anatomic function in the context of aquatic life. PROCEDURE: Methyl methacrylate casts were prepared and studied using a scanning electron microscope. Infrared images of the eye were recorded using a thermocamera. RESULTS: In all three marine species, blood is supplied to the ophthalmic rete...
March 2014: Veterinary Ophthalmology
Thu Quach, Julia Varshavsky, Julie Von Behren, Erika Garcia, My Tong, Tuan Nguyen, Alisha Tran, Robert Gunier, Peggy Reynolds
BACKGROUND: Nail salons represent a rapidly growing industry with mainly Vietnamese immigrant workers. Workers routinely handle nail products containing hazardous compounds, yet have limited accessible information to minimize workplace exposures. METHODS: We conducted a culturally appropriate pilot intervention on workplace chemical exposure reduction strategies. We trained eight Vietnamese owners, who then trained Vietnamese workers in their salons. We conducted pre-, mid-, and post-intervention assessments with workers, including an in-person survey and personal air monitoring of volatile compounds...
July 2013: American Journal of Industrial Medicine
Sanjiv K Bhimrao, Susan J Wilson, Peter H Howarth
OBJECTIVE: The purpose of this study was to understand and assess the inflammatory response within the upper and lower airways in patients suffering from both asthma and allergic rhinitis. Study Design. Cross-sectional study. Setting. A laboratory-based study of patients with allergic rhinitis and asthma. SUBJECTS AND METHODS: Glycol methacrylate resin-embedded specimens from 10 patients with allergic rhinitis and asthma taken from the nose and bronchi were assessed by immunohistochemistry...
September 2011: Otolaryngology—Head and Neck Surgery
Jonathan Borak, Cheryl Fields, Larry S Andrews, Mark A Pemberton
Methyl methacrylate (MMA) is a respiratory irritant and dermal sensitizer that has been associated with occupational asthma in a small number of case reports. Those reports have raised concern that it might be a respiratory sensitizer. To better understand that possibility, we reviewed the in silico, in chemico, in vitro, and in vivo toxicology literature, and also epidemiologic and occupational medicine reports related to the respiratory effects of MMA. Numerous in silico and in chemico studies indicate that MMA is unlikely to be a respiratory sensitizer...
March 2011: Critical Reviews in Toxicology
V R Thirumurthy, Y A Bindhoo, Sunil Joseph Jacob, Anjana Kurien, K S Limson
Repairs of the cleft nose, lip, and palatal deformity remain challenging endeavors for reconstructive surgeons. Postsurgical nasomaxillary hypoplasia is a common finding in patients with extensive clefts. This complex deformity has a pronounced impact on the social behavior and self image of the subject. Esthetic and functional rehabilitation of this postsurgical defect is scarcely reported in the literature. Support in the form of prostheses or stents to prevent tissue collapse is usually required in these patients following surgery...
April 2011: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
M C Swan, D G Bucknall, T E E Goodacre, J T Czernuszka
The advent of self-inflating hydrogel tissue expanders heralded a significant advance in the reconstructive techniques available for the surgical restoration of a wide variety of soft tissue defects. However, their use in specific applications such as cleft palate surgery is limited on account of their isotropic expansion. An anisotropic self-inflating hydrogel tissue expander has been developed which markedly increases the potential indications for which this restorative tool may be employed. These include complex pediatric soft tissue reconstructions of the palate, nose, ear and digits...
March 2011: Acta Biomaterialia
John M Hilinski, Steven R Cohen
ArteFill is a novel, third-generation polymethylmethacrylate (PMMA) injectable filler with unique properties. When compared with predecessor materials, ArteFill demonstrates improved biocompatibility as a result of more uniform PMMA microsphere size and shape. This translates into less adverse events after placement. ArteFill can provide a permanent volume enhancement by stimulation of fibroblasts that encapsulate nonabsorbable microspheres with collagen deposition. Currently, ArteFill is FDA approved for permanent augmentation of moderately deep nasolabial folds...
May 2009: Facial Plastic Surgery: FPS
Jason César Abrantes de Figueiredo, Renato Rodrigues Naufal, Antonio Gustavo Zampar, José Marcos Mélega
Despite the benefits from the minimally invasive technique, complications may occur, raising doubts about the safety of polymethylmethacrylate as an injectable filler material. The authors report their treatment of a patient from another institution with necrosis involving full-thickness nasal skin and upper lip after injection of polymethylmethacrylate in the nasolabial folds and nose for augmentation. An expanded median forehead flap was used to reconstruct the nose, and an Abbé flap was used for the upper lip...
June 2010: Aesthetic Plastic Surgery
No abstract text is available yet for this article.
March 1949: Transactions—American Academy of Ophthalmology and Otolaryngology
M S Jaakkola, T Leino, L Tammilehto, P Ylöstalo, E Kuosma, K Alanko
BACKGROUND: Case reports of occupational asthma in dental personnel have been published, but there is little data on the risk of respiratory disorders related to occupational exposure to methacrylates in dental assistants. The objective of this study was to investigate the relation of exposure to methacrylates to occurrence of respiratory symptoms and diseases among dental assistants. METHODS: A cross-sectional study of female dental assistants from the membership register of the Finnish Association of Dental Hygienists and Assistants was conducted in the Helsinki metropolitan area...
June 2007: Allergy
Yu-Tung Dai, Cheng-Ping Chang, Liang-Jei Tu, Der-Jen Hsu
This study reports a method for constructing a head model with a continuous airway passage beginning from the nostrils and continuing through the second generation of bronchi, using computerized tomographic (CT) images of facial features and airway passages from a healthy Taiwanese male adult. When combined with a manikin torso and connected to a cyclic breathing machine, the Taiwanese head model can simulate human breathing movement. This model enables investigation of important parameters of deposition efficiency without the inter- and intrasubject variability that often occurs in human studies...
May 2007: Inhalation Toxicology
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