FARUK. E. R.; DEVECI, E.; KALKANLI, S. & DEVECI, B.The effects of nicotine on the incisive teeth and expression of vimentin in rats. Int. J. Morphol., 31(2):516-519, 2013. SUMMARY:Nicotine is an alkaloid toxic effects of oral cavity. In this study,14 adult Sprague-Dawley rats weighing 230-260 mg (±10 mg) were used as experimental animal. The rats of experimental group (n=6) were nicotinized systemically with nicotine sulphate, 2mg/kg subcutaneously, daily in period of 28 days. Pulp, alveolar bone tissue, periodontal membrane and gingival epithelial junction were investigated in these regions in incisive teeth longitudinal cross-section. Thinning of the collagen fibers in the pulp tissue, vascular congestion, and inflammatory cell infiltration were observed. Mesenchymal tissues that is stained positive for vimentin lay underneath the epithelium. A strong expression of vimentin can be observed in formed periodontal ligament.
ÖZETDentin aşırı hassasiyeti, açığa çıkmış dentinin termal, buharlaşma, dokunma, elektriksel, kimyasal veya osmotik uyaranlara karşı cevap olarak oluşturduğu kısa süreli, keskin ve şiddetli ağrı olarak tanımlanmaktadır. Ağrı mekanizması ile ilgili çeşitli teoriler ortaya atılmış ancak; dentin aşırı hassasiyetinin oluşturduğu ağrı mekanizması halen kesin olarak anlaşılamamıştır. Epidemiyolojik çalışmalar da çok farklı sonuçlar elde edilmiştir. Etyolojisi multifaktöri-yeldir. Görülme sıklığı gün geçtikçe artan dentin aşırı hassasiyeti diğer tüm patolojilerin elenmesi ile teşhis edilebildiği için teşhisi zor bir durumdur. Tedavisi amacıyla pek çok materyal ve yöntem denenmiştir ancak henüz altın standart olabilecek bir yöntem belirlenememiştir. Bu derlemede dentin aşırı hassasiyetinin tanımı, ağrı mekanizması ile ilgili teoriler, etiyoloji ve risk faktörleri, tanı ve teşhisi ile tedavide kullanılan materyal ve yöntemler tartışılacaktır.Anahtar Kelimeler: Ağrı Mekanizması, Dentin Aşırı Hassasiyeti, Etiyoloji, Tedavi GĠRĠġDentin aşırı hassasiyeti (DAH), açığa çıkmış dentinin, termal, buharlaşma, dokunma, elektriksel, osmotik veya kimyasal uyaranlara karşı oluşturduğu ve başka hiçbir dental patoloji, defekt ve hastalık olarak tanısı konulamayan, tipik, kısa süreli, şiddetli, keskin ağrı ile karakterize durumudur. Bu durumu açıklamak için kullanılmış terimler arasında; dentin hassasiyeti/ dentin aşırı hassasiyeti (hipersensitivitesi),dentinal aşırı hassasiyet, servikal hassasiyet/ servikal aşırı hassasiyet, kök hasassiyeti/ ABSTRACTDentin hypersensitivity has been defined as the short, sharp and severe pain arising from exposed dentin in response to thermal, evaporative, tactile, electrical, chemical or osmotic stimuli. Various theories about pain mechanism of dentin hypersensitivity have been reported but none of the pain mechanisms has not been proved yet. The epidemiological research reported various prevelances about dentin hypersensitivity and day after day it is increasing. The aetiology of dentin hypersensitivity is multifactorial. Diagnosis is difficult. Different materials and methods have been used for the treatment of dentin hypersensitivity but a gold standart for treatment has not been found yet. The definition, theories about pain mechanisms, aetiology and risk factors, diagnosis and treatment of dentin hypersensitivity will be discussed in this review.
SUMMARY: Dithiocarbamate propinebs are organometal fungicides that are widely used for the control of diseases in plants. In this study, pregnant female rats received 400 ppm propineb concentrations in 5 ml distilled water for 16 days of gestation, and then infant rats were obtained by cesarean section. In the histological analysis on the frontal sections, the use of propineb was found effective on odontoblast cell hyperplasia, cell infiltration in the dental papilla, and degeneration in the mesenchymal cells of the outer enamel. The expression of MMP-2 (Matrix Metalloproteinase-2) and VEGF (Endothelial cell growth factor) in the connective tissue was evaluated by immunohistochemistry. The drinking water given to the mothers in propineb tooth bud, enamel and dentin, resulted in morphological changes suggestive of a delay in formation, which cross the placental barrier and possibly affect the tooth development.
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