Daniela Hesse1, Clarissa Calil Bonifácio2, Marcelo Bönecker3, Camila de Almeida Brandão Guglielmi4, Carolina da Franca5, Willem Evert van Amerongen2, Viviane Colares5, Daniela Prócida Raggio3. 1. Department of Conservative Dentistry, Academic Centre for Dentistry Amsterdam, Amsterdam, The Netherlands. d.hesse@acta.nl. 2. Department of Conservative Dentistry, Academic Centre for Dentistry Amsterdam, Amsterdam, The Netherlands. 3. Department of Orthodontics and Pediatric Dentistry, Dental School, University of São Paulo, São Paulo, São Paulo, Brazil. 4. Private practice in São Paulo, São Paulo, Brazil. 5. Department of Social Dentistry, Dental School, University of Pernambuco; in Recife, Pernambuco, Brazil.
Abstract
PURPOSE: The high-viscosity consistency of glass ionomer cement (GIC) contributes to its inappropriate adaptation, while the material's premature exposure to humidity decreases its mechanical properties. This study's purposes were to: (1) investigate approximal atraumatic restorative treatment (ART) restorations' survival in primary molars using two different insertion techniques and two surface protection materials; and (2) compare the results of cities where treatments were performed. METHODS:A total of 389 six- to seven-year-olds were selected from two cities in Brazil and randomly assigned into four groups: (1) ART restorations plus petroleum jelly (PJ); (2) bilayer-ART restorations plus PJ; (3) ART restorations plus nanofilled coating for GIC (NC); (4) bilayer-ART restorations plus NC. Restorations were evaluated after one, six, 12, 18, and 24 months. Kaplan-Meier survival analysis, log-rank test, and Cox regression analysis were performed. RESULTS:Restorations' cumulative survival was 46.4 percent. There was a higher survival of bilayer-ART restorations (P=0.03). No difference was observed between surface protection materials (P=0.57). Restorations made in Barueri were almost 2.5-fold more likely to survive than those from Recife (P<0.001). CONCLUSIONS: The bilayer technique improves approximal ART restorations' survival in primary molars. The nanofilled coating does not influence restorations' survival rate, and the city where treatments were performed influences restoration survival.
RCT Entities:
PURPOSE: The high-viscosity consistency of glass ionomer cement (GIC) contributes to its inappropriate adaptation, while the material's premature exposure to humidity decreases its mechanical properties. This study's purposes were to: (1) investigate approximal atraumatic restorative treatment (ART) restorations' survival in primary molars using two different insertion techniques and two surface protection materials; and (2) compare the results of cities where treatments were performed. METHODS: A total of 389 six- to seven-year-olds were selected from two cities in Brazil and randomly assigned into four groups: (1) ART restorations plus petroleum jelly (PJ); (2) bilayer-ART restorations plus PJ; (3) ART restorations plus nanofilled coating for GIC (NC); (4) bilayer-ART restorations plus NC. Restorations were evaluated after one, six, 12, 18, and 24 months. Kaplan-Meier survival analysis, log-rank test, and Cox regression analysis were performed. RESULTS: Restorations' cumulative survival was 46.4 percent. There was a higher survival of bilayer-ART restorations (P=0.03). No difference was observed between surface protection materials (P=0.57). Restorations made in Barueri were almost 2.5-fold more likely to survive than those from Recife (P<0.001). CONCLUSIONS: The bilayer technique improves approximal ART restorations' survival in primary molars. The nanofilled coating does not influence restorations' survival rate, and the city where treatments were performed influences restoration survival.