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Year : 2013  |  Volume : 2  |  Issue : 2  |  Page : 119-123

A cytological analysis of the oral mucosa adjacent to orthodontic devices

1 Graduate Dentistry Program, Orthodontics, Centro Universitário da Grande Dourados, Dourados, Brazil
2 Depatment for Stomatology, Universidade Federal do Paraná, Curitiba, Brazil
3 Pontifícia Universidade Católica do Paraná, Curitiba, School of Health and Biosciences, Dentistry Graduate Program - Orthodontics, Brazil

Correspondence Address:
Elisa Souza Camargo
Graduate Dentistry Program, Orthodontics, Pontifícia Universidade Católica do Paraná, Curitiba, Rua Imaculada Conceição, 1155
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2278-9626.112308

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Objectives: The objective of this study, was to evaluate the cytometry and cytomorphology of oral mucosa epithelial cells adjacent to orthodontic accessories using liquid-based exfoliative cytology. Materials and Methods: We placed metallic brackets on the upper pre-molars with stainless steel wires and metal or elastic ties on 20 people of both sexes, with an average age of 22.7 years. We evaluated nucleus area (NA), cytoplasm area (CA), and NA/CA ratio before installation (T0, baseline), 30 days after installation (T1), and 30 days after the accessories were removed (T2). Results: We verified a reduction in NA and an increase in CA with both types of ties at T1 ( P<0.05 vs. T0), with a tendency to return to baseline values at T2 ( P<0.05 vs. T0). At T1 and T2 we observed a predominance of surface cells over subsurface cells. Conclusions: The orthodontic appliance causes adaptive cell changes characterized by an increased level of keratinization of the oral mucosa, with a tendency to return to the normal state after removal of the mechanical stimulus of the orthodontic devices.

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