A D Loguercio1, M Rezende2, M F Gutierrez3, T F Costa4, A Armas-Vega5, A Reis6. 1. Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil; School of Dentistry, Federal University of Parana, Curitiba, Brazil. Electronic address: aloguercio@hotmail.com. 2. Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil; Paulo Picanco School of Dentistry, Fortaleza, Ceara, Brazil. 3. Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil; Institute for Research in Dental Science, Faculty of Dentistry, University of Chile, Chile. 4. School of Dentistry, Federal University of Parana, Curitiba, Brazil. 5. Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito, Equador. 6. Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil.
Abstract
OBJECTIVE: The aim of this double blind, randomized controlled trial was to evaluate the 36-month clinical performance of the layering technique (incremental [IF] vs. bulk-fill [BF]) in posterior composite resin restorations bonded with self-etch (SE) and etch-and-rinse (ER) strategies. METHODS: Posterior dental cavities of 72 participants (n = 236), with a cavity depth of at least 3 mm, were randomly divided into four groups. The restorations were bonded using either the Tetric N-Bond ER or Tetric N-Bond SE. The composite resin Tetric N-Ceram Bulk-Fill was placed either IF or using BF. Two experienced and calibrated examiners evaluated the restorations using FDI criteria in the baseline and after 12, 24 and 36-month. The statistical analyses were performed using the Wilcoxon Signed rank test (α = 0.05) RESULTS: After 36-month, 14, 21 and 33 restorations showed minor fractures, marginal desadaptation and color mismatch, respectively (p > 0.05). Thirty-three restorations showed some marginal discoloration after 36-month with significant difference between ER (3 for ER-IF; 3 for ER-BF) and SE (14 for SE-IF; 12 for SE-BF; p < 0.05). CONCLUSION: The BF technique showed excellent clinical performance, which was comparable during the 36-month of clinical evaluation with the 2-mm IF and it was not affected by the adhesive strategy. However, using the ER strategy reduces the risk of some marginal discoloration, irrespectively of the filling technique. CLINICAL RELEVANCE: The bulk-fill material showed excellent clinical behavior when compared to its use in an incremental filling technique, mainly when associated to etch-and-rinse adhesive material after 3 years of clinical evaluation.
RCT Entities:
OBJECTIVE: The aim of this double blind, randomized controlled trial was to evaluate the 36-month clinical performance of the layering technique (incremental [IF] vs. bulk-fill [BF]) in posterior composite resin restorations bonded with self-etch (SE) and etch-and-rinse (ER) strategies. METHODS: Posterior dental cavities of 72 participants (n = 236), with a cavity depth of at least 3 mm, were randomly divided into four groups. The restorations were bonded using either the Tetric N-Bond ER or Tetric N-Bond SE. The composite resin TetricN-Ceram Bulk-Fill was placed either IF or using BF. Two experienced and calibrated examiners evaluated the restorations using FDI criteria in the baseline and after 12, 24 and 36-month. The statistical analyses were performed using the Wilcoxon Signed rank test (α = 0.05) RESULTS: After 36-month, 14, 21 and 33 restorations showed minor fractures, marginal desadaptation and color mismatch, respectively (p > 0.05). Thirty-three restorations showed some marginal discoloration after 36-month with significant difference between ER (3 for ER-IF; 3 for ER-BF) and SE (14 for SE-IF; 12 for SE-BF; p < 0.05). CONCLUSION: The BF technique showed excellent clinical performance, which was comparable during the 36-month of clinical evaluation with the 2-mm IF and it was not affected by the adhesive strategy. However, using the ER strategy reduces the risk of some marginal discoloration, irrespectively of the filling technique. CLINICAL RELEVANCE: The bulk-fill material showed excellent clinical behavior when compared to its use in an incremental filling technique, mainly when associated to etch-and-rinse adhesive material after 3 years of clinical evaluation.
Authors: Britta Hahn; Imme Haubitz; Ralf Krug; Gabriel Krastl; Sebastian Soliman Journal: Int J Environ Res Public Health Date: 2022-04-19 Impact factor: 4.614