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Sulyanto RM, Kang M, Srirangapatanam S, Berger M, Candamo F, Wang Y, Dickson JR, Ng MW, Ho SP. Biomineralization of Dental Tissues Treated with Silver Diamine Fluoride. J Dent Res 2021; 100:1099-1108. [PMID: 34323107 DOI: 10.1177/00220345211026838] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Silver diamine fluoride (SDF) is a dental biomaterial used to arrest dental caries. To better understand SDF's mechanism of action, we examined the localization of silver within the tissues of SDF-treated teeth. Carious primary teeth fixed within 2 min of SDF application (SDF-minutes, n = 3), at 3 wk after SDF application in vivo (SDF-weeks, n = 4), and at 2 y after multiple SDF applications in vivo (SDF-multiple, n = 1) were investigated in this study. Carious primary teeth without SDF application (no-SDF, n = 3) served as controls. Mineral density and structural analyses were performed via micro-X-ray computed tomography and scanning electron microscopy. Elemental analyses were performed through X-ray fluorescence microprobe and energy-dispersive X-ray spectroscopic techniques. SDF-treated teeth revealed higher X-ray-attenuated surface and subsurface regions within carious lesions, and similar regions were not present in no-SDF teeth. Regions of higher mineral density correlated with regions of silver abundance in SDF-treated teeth. The SDF penetration depth was approximated to 0.5 ± 0.02 mm and 0.6 ± 0.05 mm (mean ± SD) for SDF-minutes and SDF-weeks specimens, respectively. A higher percentage of dentin tubular occlusion by silver or calcium phosphate particles was observed in primary teeth treated with SDF-weeks as compared with SDF-minutes. Elemental analysis also revealed zinc abundance in carious lesions and around the pulp chamber. SDF-weeks teeth had significantly increased tertiary dentin than SDF-minutes and no-SDF teeth. These results suggest that SDF treatment on primary teeth affected by caries promotes pathologic biomineralization by altering their physicochemical properties, occluding dentin tubules, and increasing tertiary dentin volume. These seemingly serendipitous effects collectively contribute to the cariostatic activity of SDF.
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Affiliation(s)
- R M Sulyanto
- Department of Dentistry, Boston Children's Hospital, Boston, MA, USA.,Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA
| | - M Kang
- Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California San Francisco, San Francisco, CA, USA
| | - S Srirangapatanam
- Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California San Francisco, San Francisco, CA, USA.,Department of Urology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - M Berger
- Department of Dentistry, Boston Children's Hospital, Boston, MA, USA.,Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA
| | - F Candamo
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA
| | - Y Wang
- Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California San Francisco, San Francisco, CA, USA
| | - J R Dickson
- Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - M W Ng
- Department of Dentistry, Boston Children's Hospital, Boston, MA, USA.,Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA
| | - S P Ho
- Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California San Francisco, San Francisco, CA, USA.,Department of Urology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
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Dickson JR, Brinkman DW, Blackburn GR. Evaluation of the dermal carcinogenic potential of re-refined base stocks using the modified Ames assay, PAC analysis and the 32P-postlabeling assay for DNA adduct induction. J Appl Toxicol 1997; 17:113-7. [PMID: 9183054 DOI: 10.1002/(sici)1099-1263(199703)17:2<113::aid-jat412>3.0.co;2-#] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The standard method for assessing the carcinogenicity of lubricating oil base stocks is the mouse skin-painting bioassay. This assay has the advantage of directly measuring the endpoint of interest, dermal carcinogenicity, but has the drawback of being time-consuming and expensive. For this reason, a variety of biological and chemical assays have been developed as predictive alternatives to the in vivo assay. This publication describes the application of three such methods to the assessment of carcinogenic potential of hydrotreated, re-refined oils: the modified Ames test, the analytical determination of 3-7-ring polycyclic aromatic compound content and the 32P-postlabeling assay for DNA adduct induction.
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Affiliation(s)
- J R Dickson
- Safety-Kleen Canada Inc., St.-Constant, Québec, Canada
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Mader R, Narendran A, Lewtas J, Bykerk V, Goodman RC, Dickson JR, Keystone EC. Systemic vasculitis following influenza vaccination--report of 3 cases and literature review. J Rheumatol 1993; 20:1429-31. [PMID: 8230034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Influenza vaccination is a widely accepted practice particularly among the elderly and high risk individuals. Minor and transitory side effects following the vaccination are common while systemic complications are infrequently reported. We describe 3 patients who developed systemic vasculitis following influenza vaccination. With increasing use of influenza vaccination, attention should be drawn to the possible expression of systemic adverse effects such as vasculitis.
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Affiliation(s)
- R Mader
- University of Toronto Rheumatic Disease Unit, Wellesley Hospital, Ontario, Canada
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