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Long-term fluoride release from glass ionomer-lined amalgam restorations.
Am J Dent. 1991 Oct; 4(5):223-5.AJ

Abstract

This in vitro study evaluated the amount of fluoride released from glass ionomer-lined amalgam restorations over a period of 1 year. Class V cavities (2 x 2 x 7 mm) were prepared on the facial and lingual surfaces of 50 extracted human molars randomly distributed into 5 groups: Group 1: No restorations; Group 2: Dispersalloy amalgam alone; Group 3: same as Group 2 except 1 mm of Ketac-Silver was placed on the axial wall before amalgam insertion; Group 4: GC Lining/amalgam; and Group 5: Miracle Mix/amalgam. After restoration, each tooth was thermocycled (100x) at 5 degrees C and 55 degrees C with a dwell time of 30 seconds for baseline fluoride release levels. The teeth were placed in a polyethylene vial containing 4 ml of deionized water. At weekly intervals, each tooth was transferred to a fresh vial. Fluoride release was measured with a fluoride ion specific electrode for 10 consecutive weeks and then again at the end of 1 year. Calibration curves for low level measurements were prepared so the readings could be expressed in micrograms/ml F. At 1 year, fluoride released in micrograms/ml was: Group 1: less than 0.08; Group 2: less than 0.08; Group 3: 0.28; Group 4: 0.68; Group 5: 1.12. An ANOVA was used to evaluate the statistical difference between the groups. At the end of 1 year, measurable amounts of fluoride were recorded for all glass ionomer-lined groups with Miracle Mix and GC Lining releasing significantly more fluoride than Ketac-Silver (P less than 0.002).

Authors+Show Affiliations

Department of Pediatric Dentistry, University of Texas Health Science Center at San Antonio 78284-7888.No affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

1810331

Citation

Garcia-Godoy, F, and D C. Chan. "Long-term Fluoride Release From Glass Ionomer-lined Amalgam Restorations." American Journal of Dentistry, vol. 4, no. 5, 1991, pp. 223-5.
Garcia-Godoy F, Chan DC. Long-term fluoride release from glass ionomer-lined amalgam restorations. Am J Dent. 1991;4(5):223-5.
Garcia-Godoy, F., & Chan, D. C. (1991). Long-term fluoride release from glass ionomer-lined amalgam restorations. American Journal of Dentistry, 4(5), 223-5.
Garcia-Godoy F, Chan DC. Long-term Fluoride Release From Glass Ionomer-lined Amalgam Restorations. Am J Dent. 1991;4(5):223-5. PubMed PMID: 1810331.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-term fluoride release from glass ionomer-lined amalgam restorations. AU - Garcia-Godoy,F, AU - Chan,D C, PY - 1991/10/1/pubmed PY - 1991/10/1/medline PY - 1991/10/1/entrez SP - 223 EP - 5 JF - American journal of dentistry JO - Am J Dent VL - 4 IS - 5 N2 - This in vitro study evaluated the amount of fluoride released from glass ionomer-lined amalgam restorations over a period of 1 year. Class V cavities (2 x 2 x 7 mm) were prepared on the facial and lingual surfaces of 50 extracted human molars randomly distributed into 5 groups: Group 1: No restorations; Group 2: Dispersalloy amalgam alone; Group 3: same as Group 2 except 1 mm of Ketac-Silver was placed on the axial wall before amalgam insertion; Group 4: GC Lining/amalgam; and Group 5: Miracle Mix/amalgam. After restoration, each tooth was thermocycled (100x) at 5 degrees C and 55 degrees C with a dwell time of 30 seconds for baseline fluoride release levels. The teeth were placed in a polyethylene vial containing 4 ml of deionized water. At weekly intervals, each tooth was transferred to a fresh vial. Fluoride release was measured with a fluoride ion specific electrode for 10 consecutive weeks and then again at the end of 1 year. Calibration curves for low level measurements were prepared so the readings could be expressed in micrograms/ml F. At 1 year, fluoride released in micrograms/ml was: Group 1: less than 0.08; Group 2: less than 0.08; Group 3: 0.28; Group 4: 0.68; Group 5: 1.12. An ANOVA was used to evaluate the statistical difference between the groups. At the end of 1 year, measurable amounts of fluoride were recorded for all glass ionomer-lined groups with Miracle Mix and GC Lining releasing significantly more fluoride than Ketac-Silver (P less than 0.002). SN - 0894-8275 UR - https://www.unboundmedicine.com/medline/citation/1810331/Long_term_fluoride_release_from_glass_ionomer_lined_amalgam_restorations_ DB - PRIME DP - Unbound Medicine ER -