Long-term fluoride release from a composite restorative |
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| Authors: | S C Temin Z Csuros |
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| Affiliation: | 1. MacroChem Corporation, Woburn, Massachusetts, 21X Olympia Avenue, Woburn, 01801, USA;2. Kendall Company, Lexington Laboratory, Lexington, Massachusetts, USA;1. Department of Dentistry, Fundação Hermínio Ometto, FHO - Uniararas, Araras, SP, Brazil;2. Department of Restorative Dentistry - Dental Materials Division, Piracicaba Dental School, Areião, Piracicaba, SP, Brazil;3. Department of Orthodontics, School of Dentistry of Araras, Uniararas, SP, Brazil;1. United States Air Force, 1615 Truemper St., Joint Base San Antonio-Lackland, TX 78236, USA;2. United States Air Force, 3650 Chambers Pass, Ft. Sam Houston, TX 78023, USA;3. United States Air Force, 2200 Bergquist Dr., Joint Base San Antonio-Lackland, TX 78233, USA;4. United States Air Force, 301 Fisher St., Keesler AFB, MS 39534, USA;1. Medical Materials Laboratory, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India;2. Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, 600036, India;3. NUS Centre for Nanofibers and Nanotechnology, Department of Mechanical Engineering, National University of Singapore, 2 Engineering Drive 3, 117581, Singapore |
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| Abstract: | Discs prepared from a new composite restorative and initially containing 11.2 mg/g of fluoride ion were immersed in water and the fluoride released was measured over a period in excess of 4 years. There was a short burst effect, followed by a decreasing rate of release, which reached a steady rate of about 0.2 μg/cm2 fluoride per day, equivalent to zero order release, after approximately 8 months. After 1591 days of water immersion, the discs retained over 72% of their original fluoride content. There was no change in Barcol hardness of the specimens after leaching. It was also demonstrated that the fluoride release rate is only moderately reduced by coating the discs with a non-fluoride bonding agent. |
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