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The Effects of Methyl Methacrylate on Nasal Cavity, Lung, and Antioxidant System (An Experimental Inhalation Study)
Ozlem Aydin
Department of Pathology, Mersin University Medical School, Mersin-Icel, Turkey, ozlemaydin66{at}hotmail.com
Gulen Attila
Department of Biochemistry, Cukurova University Medical School, Adana, Turkey
Arife Dogan
Department of Prosthetic Dentistry, Gazi University School of Dentistry, Ankara, Turkey
Mehmet Volkan Aydin
Department of Neurosurgery, Baskent University Medical School, Adana, Turkey
Necmiye Canacankatan
Department of Biochemistry, Cukurova University Medical School, Adana, Turkey
Arzu Kanik
Department of Biostatistics, Mersin University Medical School, Mersin-Icel, Turkey
Methyl methacrylate (MMA) is a monomer, commonly used in neurosurgery, orthopedic surgery, and in dental clinics. The adverse effects of this monomer are well described in the literature. This study was designed to evaluate the effects of MMA on nasal cavity, lung, and antioxidant status. For this purpose, two experimental groups of rats were exposed to MMA (at 1000 ppm, 6 h/day, 5 days/week for 4 weeks) by inhalation under poor (group A, n = 12) and normal ventilation (group B, n = 11) conditions. A control group (group C, n = 10) received normal air. Degeneration of olfactory epithelium, bronchopneumonia , interstitial pneumonia, hemorrhage, atelectasis, edema, emphysema, and bronchial epithelial hyperplasia were observed in groups A and B. Emphysema was the most common lesion. Bronchopneumoni a with abscesses was only observed in group A. Glutathione levels were signifi cantly decreased and malondialdehyde levels were signifi cantly increased in group A. No signifi cant difference was observed in superoxide dismutase levels between the groups. The data presented indicate that before using MMA, adequate protection systems should be in place to prevent occupationally related MMA respiratory-tract injuries.
Key Words: Antioxidant system inhalation lungs methyl methacrylate nasal cavity rats.
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Toxicologic Pathology, Vol. 30, No. 3,
350-356 (2002)
DOI: 10.1080/01926230252929927

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