Dentin Surface Pretreatment with Dimethyl-Sulfoxide Primer | ||||
| Mansoura Journal of Dentistry | ||||
| Article 9, Volume 8, Issue 1, March 2021, Page 49-50 PDF (369.52 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjd.2021.199851 | ||||
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| Abstract | ||||
| Despite the evolution in adhesive dentistry over the past decades,1 degradation of tooth-bonded interfaces still contributes to the reduced long-term clinical success of adhesive restorations.2 Etch-and-rinse approach still relies on traditional wet-bonding technique to couple relatively hydrophilic adhesives to the hydrated dentin substrate in clinically relevant protocols. A partially wet dentin substrate has been consensually advocated to maintain the demineralized collagen matrix expanded for proper resin infiltration by relatively hydrophilic monomers.3Nevertheless, management of adequate moisture is not easily accomplished, and either excess or lack of dentin moisture may compromise resin–dentin bonding.4, 5 Recently, dimethyl sulfoxide (DMSO) has been introduced as a new potential solvent to be used in adhesive dentistry.6, 7DMSO [(CH3)2SO] is a polar aprotic solvent that dissolves both polar and non-polar compounds. It is a polyfunctional molecule, with a highly polar S=O group and two hydrophobic methyl groups , fully miscible in most solvents and monomers used in adhesive dentistry .8 DMSO is perhaps the best currently known penetration enhancer for medical purposes9 with the ability to dissociate the highly cross linked collagen into a sparser network of apparent fibrils.10 In addition, dissociation of water self-associative tendency by DMSO 11 improves wettability of demineralized dentin ,12 monomer diffusion into the collagen matrix 6and concomitantly re-expands collapsed collagen to a fairly modest level.13 | ||||
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