Eliseu Aldrighi Münchow1, Carine Tais Welter Meereis2, Wellington Luiz de Oliveira da Rosa2, Adriana Fernandes da Silva2, Evandro Piva3. 1. Department of Dentistry, Health Science Institute, Federal University of Juiz de Fora, Governador Valadares, Brazil. 2. Department of Restorative Dentistry and Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil. 3. Department of Restorative Dentistry and Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil. Electronic address: evpiva@pq.cnpq.br.
Abstract
PURPOSE: A systematic review was conducted to determine whether there were any alternative technique or additional step strategies available to reduce and control polymerization shrinkage stress development in dental resin-based restorative materials. DATA SOURCES: This report followed the PRISMA Statement. A total of 36 studies were included in this review. Two reviewers performed a literature search up to December 2016, without restriction of the year of publication, in seven databases: PubMed, Web of Science, Scopus, SciELO, LILACS, IBECS, and BBO. STUDY SELECTION: Only in vitro studies that evaluated polymerization shrinkage stress by direct testing were included. Pilot studies, reviews and in vitro studies that evaluated polymerization shrinkage stress by indirect methods (e.g., microleakage or cuspal deflection measurements), finite elemental analysis or mathematical models were excluded. Of the 6.113 eligible articles, 36 studies were included in the qualitative analysis, and the meta-analysis was performed with 25 studies. A global comparison was performed with random-effects models (α = 0.05). The strategies were subdivided as follows: the use of an alternative technique protocol of placing the material inside the tooth cavity; the modification of the irradiation intensity or total energy delivered to the material; the use of an alternative light-curing source; or the use of an alternative photo-activation mode. All alternative strategies showed statistically significant differences when compared with their respective controls (p < 0.05). CONCLUSION: The use of alternative light-curing sources contributed more to minimizing stress development than placing the material by means of an alternative technique protocol or by modifying the irradiant intensity or total energy delivered to the material during photo-activation. Moreover, the use of an alternative photo-activation mode (intermittent light, exponential, soft-start or pulse delay modes) was shown to be an effective strategy for reducing and controlling stress development in resin-based dental materials.
PURPOSE: A systematic review was conducted to determine whether there were any alternative technique or additional step strategies available to reduce and control polymerization shrinkage stress development in dental resin-based restorative materials. DATA SOURCES: This report followed the PRISMA Statement. A total of 36 studies were included in this review. Two reviewers performed a literature search up to December 2016, without restriction of the year of publication, in seven databases: PubMed, Web of Science, Scopus, SciELO, LILACS, IBECS, and BBO. STUDY SELECTION: Only in vitro studies that evaluated polymerization shrinkage stress by direct testing were included. Pilot studies, reviews and in vitro studies that evaluated polymerization shrinkage stress by indirect methods (e.g., microleakage or cuspal deflection measurements), finite elemental analysis or mathematical models were excluded. Of the 6.113 eligible articles, 36 studies were included in the qualitative analysis, and the meta-analysis was performed with 25 studies. A global comparison was performed with random-effects models (α = 0.05). The strategies were subdivided as follows: the use of an alternative technique protocol of placing the material inside the tooth cavity; the modification of the irradiation intensity or total energy delivered to the material; the use of an alternative light-curing source; or the use of an alternative photo-activation mode. All alternative strategies showed statistically significant differences when compared with their respective controls (p < 0.05). CONCLUSION: The use of alternative light-curing sources contributed more to minimizing stress development than placing the material by means of an alternative technique protocol or by modifying the irradiant intensity or total energy delivered to the material during photo-activation. Moreover, the use of an alternative photo-activation mode (intermittent light, exponential, soft-start or pulse delay modes) was shown to be an effective strategy for reducing and controlling stress development in resin-based dental materials.
Authors: Guilherme Dos Santos Sousa; Gabriel Felipe Guimarães; Edilmar Marcelino; José Eduardo Petit Rodokas; Arilson José de Oliveira Júnior; Ivana Cesarino; Alcides Lopes Leão; Carla Dos Santos Riccardi; Mohammad Arjmand; Rafael Plana Simões Journal: Polymers (Basel) Date: 2021-06-23 Impact factor: 4.329
Authors: Louis Hardan; Rim Bourgi; Carlos Enrique Cuevas-Suárez; Maciej Zarow; Naji Kharouf; Davide Mancino; Carlos Fernández Villares; Dariusz Skaba; Monika Lukomska-Szymanska Journal: Microorganisms Date: 2021-06-06