Acidic Monetite Complex Paste with Bleaching Property for In-depth Occlusion of Dentinal Tubules
Authors Li B, Liu C, Fang ZH, Cao Y, Zhou Z, Lu H
Received 18 October 2020
Accepted for publication 5 December 2020
Published 6 January 2021 Volume 2021:16 Pages 31—45
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 4
Editor who approved publication: Professor Israel (Rudi) Rubinstein
Bolin Li,1 Chunyan Liu,2,3 Ze-hui Fang,4 Ying Cao,4 Zheng Zhou,3 Haiyan Lu2
1Hebei Key Laboratory of Stomatology, Hebei Clinical Research Center for Oral Diseases, School & Hospital of Stomatology, Hebei Medical University, Shijiazhuang 050017, People’s Republic of China; 2Department of Orthodontics, Hebei Key Laboratory of Stomatology, Hebei Clinical Research Center for Oral Diseases, School & Hospital of Stomatology, Hebei Medical University, Shijiazhuang 050017, People’s Republic of China; 3School of Dentistry, University of Detroit Mercy, Detroit, Michigan 48208, USA; 4School & Hospital of Stomatology, Anhui Medical University, Hefei 230032, People’s Republic of China
Correspondence: Zheng Zhou
School of Dentistry, University of Detroit Mercy, 2700 Martin Luther King Jr. Blvd, Detroit, Michigan 48208, USA
Department of Orthodontics, Hebei Key Laboratory of Stomatology, Hebei Clinical Research Center for Oral Diseases, School & Hospital of Stomatology, Hebei Medical University, 383 Zhongshan East Road, Shijiazhuang, Hebei 050017, People’s Republic of China
Tel/Fax +86 311-86265748
Background: Dentin hypersensitivity (DH) is a common dental clinical condition presented with a short and sharp pain in response to physical and chemical stimuli. Currently no treatment regimen demonstrates long-lasting efficacy in treating DH, and unesthetic yellow tooth color is a concern to many patients with DH.
Aim: To develop a bi-functional material which can occlude dentinal tubules in-depth and remineralize dentin for long-lasting protection of the dentin–pulp complex from stimuli and bleach the tooth at the same time.
Methods: A mixture containing CaO, H3PO4, polyethylene glycol and H2O2 at a specific ratio was mechanically ground using a planetary ball. The mineralizing complex paste was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Dentin was exposed to the synthesized paste for 8 h and 24 h in vitro. The mineralizing property was evaluated using SEM and microhardness tests. Red tea-stained tooth slices were exposed to the synthesized paste for 8 h and 24 h in vitro. The bleaching effect was characterized by a spectrophotometer.
Results: The complex paste had very a fine texture, was injectable, and had a gel-like property with 2.6 (mass/volume) % H2O2 concentration. The X-ray diffraction pattern showed that the inorganic phase was mainly monetite (CaHPO4). The mineralizing complex paste induced the growth of inorganic crystals on the dentin surface and in-depth occlusion of dentin tubules by up to 80 μm. The regenerated crystals were integrated into the dentin tissue on the dentin surface and the wall of dentinal tubules with a microhardness of up to 126 MPa (versus 137 Mpa for dentin). The paste also bleached the stained dental slices.
Conclusion: The mineralizing complex paste is a promising innovative material for efficient DH management by remineralizing dentin and in-depth occlusion of dentin tubules, as well as tooth bleaching.
Keywords: dentin hypersensitivity, remineralization, tooth whitening, planetary ball mill
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