Are Clinically Successful Amalgam and ART Restorations in Primary Molars Microgap Free?
SourceJournal of Adhesive Dentistry, 20, 1, (2018), pp. 25-32
Article / Letter to editor
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Journal of Adhesive Dentistry
SubjectRadboudumc 0: Other Research RIHS: Radboud Institute for Health Sciences; Radboudumc 10: Reconstructive and regenerative medicine RIHS: Radboud Institute for Health Sciences
PURPOSE: To determine whether the frequency of microleakage at the margin of the tooth-restoration interface in primary molars restored with high-viscosity glass-ionomer cement (HVGIC) differs from that of primary molars restored with amalgam. MATERIALS AND METHODS: The HVGIC restorations were performed according to the ART method. A total of 19 naturally exfoliated primary molars (10 amalgam and 9 ART/HVGIC) with clinically assessed intact restorations fulfilled the inclusion criteria. SEM analyses using replicas were performed to assess the microgap presence and size of the tooth-restoration interface The depth of a microgap was measured from histological sections after infiltration of 50% (w/v) AgNO3 solution. Independent variables were restorative material, age of restoration, and number of tooth surfaces. Data analyses included Fisher's Exact version of the chi-squared test, independent t-test and one-way ANOVA. RESULTS: More ART/HVGIC than amalgam-restored teeth were gap free (p = 0.14). The mean gap size for teeth with a gap between amalgam (322.0 microm) and ART/HVGIC (201.0 microm) restorations did not differ statistically significantly. AgNO3 infiltration was not influenced by restorative material or age of restoration. Infiltration in multiple-surface was higher than in single-surface restorations (p = 0.02). CONCLUSION: The occurrence of marginal microleakage in primary molars restored by ART/HVGIC is no different from that observed in primary molars restored with amalgam. Microleakage was deeper in multiple-surface than in single-surface restorations. Despite the presence of microleakage, restoration functionality up to exfoliation is secured, reinforcing the importance of biofilm removal and behavioral education of patients.
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