Dentin abrasivity of various desensitizing toothpastes
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RESEARCH
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Dentin abrasivity of various desensitizing toothpastes W. H. Arnold1*, Ch. Gröger1, M. Bizhang2 and E. A. Naumova1
Abstract Background: The aim of this study was to compare the abrasivity of various commercially available toothpastes that claim to reduce dentin hypersensitivity. Methods: Dentin discs were prepared from 70 human extracted molars. The discs were etched with lemon juice for 5 min, and one half of the discs were covered with aluminum tape. Following this, they were brushed with 6 different toothpastes, simulating a total brushing time of 6 months. As a negative control, discs were brushed with tap water only. The toothpastes contained pro-arginine and calcium carbonate, strontium acetate, stannous fluoride, zinc carbonate and hydroxyapatite, new silica, or tetrapotassium pyrophosphate and hydroxyapatite. After brushing, the height differences between the control halves and the brushed halves were determined with a profilometer and statistically compared using a Mann–Whitney U test for independent variables. Results: A significant difference (p < 0.001) in height difference between the controls and the toothpaste-treated samples was found in all cases, except for the stannous fluoride-containing toothpaste (p = 0.583). The highest abrasion was found in the toothpaste containing zinc carbonate and hydroxyapatite, and the lowest was found in the toothpaste containing pro-arginine and calcium carbonate. Conclusions: Desensitizing toothpastes with different desensitizing ingredients have different levels of abrasivity, which may have a negative effect on their desensitizing abilities over a long period of time. Keywords: Toothpaste, Dentin, Dentin tubules, Root dentin, Hypersensitivity
Background The prevalence of dentin hypersensitivity has been increasing over the past decades [1], and there is a need for adequate treatment of this condition. The causes of dentin hypersensitivity include open dentin tubules due to gingival recession and subsequent cervical dentin erosion [2]. Dentin erosion occurs for a variety of reasons. Amongst them are erosive foods and beverages, as well as esophageal reflux or eating disorders [3]. Another reason for dentin erosion may be the use of toothpastes and toothbrushes [4]. Various strategies have been developed to handle this problem. They range from home-use dental products, such as desensitizing toothpastes [5–10], to inoffice treatments, such as sealing dentin tubules either with a varnish [11–13] or with a dentin adhesive [14, 15]. The * Correspondence: [email protected] 1 Department of Biological and Material Sciences in Dentistry, School of Dentistry, Witten/Herdecke University, Witten, Germany Full list of author information is available at the end of the article
first choice treatment of dentin hypersensitivity is homeuse dental products, mainly desensitizing toothpastes. Desensitizing toothpastes are divided into two groups with different mechanisms of action. The first group comprises toothpastes that block pulp nerve responses,
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