title: Fifty years of Brazilian Dental Materials Group: scientific contributions of dental materials field evaluated by systematic review.
abstract: OBJECTIVE
  A systematic review was conducted to analyze Brazilian scientific and technological production related to the dental materials field over the past 50 years.
  
  
  METHODS
  This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (Prisma) statement. Searches were performed until December 2014 in six databases: MedLine (PubMed), Scopus, LILACS, IBECS, BBO, and the Cochrane Library. Additionally, the Brazilian patent database (INPI - Instituto Nacional de Propriedade Industrial) was screened in order to get an overview of Brazilian technological development in the dental materials field. Two reviewers independently analyzed the documents. Only studies and patents related to dental materials were included in this review. Data regarding the material category, dental specialty, number of documents and patents, filiation countries, and the number of citations were tabulated and analyzed in Microsoft Office Excel (Microsoft Corporation, Redmond, Washington, United States).
  
  
  RESULTS
  A total of 115,806 studies and 53 patents were related to dental materials and were included in this review. Brazil had 8% affiliation in studies related to dental materials, and the majority of the papers published were related to dental implants (1,137 papers), synthetic resins (681 papers), dental cements (440 papers), dental alloys (392 papers) and dental adhesives (361 papers). The Brazilian technological development with patented dental materials was smaller than the scientific production. The most patented type of material was dental alloys (11 patents), followed by dental implants (8 patents) and composite resins (7 patents).
  
  
  CONCLUSIONS
  Dental materials science has had a substantial number of records, demonstrating an important presence in scientific and technological development of dentistry. In addition, it is important to approximate the relationship between academia and industry to expand the technological development in countries such as Brazil.
authors.affiliation: - Universidade Federal de Pelotas (UFPel), Faculdade de Odontologia, Pelotas, RS, Brasil.
authors.forename: Wellington Luiz de Oliveira
authors.initials: WL
authors.lastname: Rosa
authors.affiliation: - Universidade Federal de Pelotas (UFPel), Faculdade de Odontologia, Pelotas, RS, Brasil.
authors.forename: Tiago Machado
authors.initials: TM
authors.lastname: Silva
authors.affiliation: - Universidade Federal de Pelotas (UFPel), Faculdade de Odontologia, Departamento de Odontologia Restauradora, Pelotas, RS, Brasil.
authors.forename: Giana da Silveira
authors.initials: Gda S
authors.lastname: Lima
authors.affiliation: - Universidade Federal de Pelotas (UFPel), Faculdade de Odontologia, Departamento de Odontologia Restauradora, Pelotas, RS, Brasil.
authors.forename: Adriana Fernandes
authors.initials: AF
authors.lastname: Silva
authors.affiliation: - Universidade Federal de Pelotas (UFPel), Faculdade de Odontologia, Departamento de Odontologia Restauradora, Pelotas, RS, Brasil.
authors.forename: Evandro
authors.initials: E
authors.lastname: Piva
mesh_terms: D015706:Bibliometrics; D035843:Biomedical Research / Q000706:statistics & numerical data; D001938:Brazil; D003764:Dental Materials; D062069:Inventions / Q000706:statistics & numerical data; D007598:Journalism, Dental; D010506:Periodicals as Topic / Q000706:statistics & numerical data; D012958:Societies, Scientific / Q000706:statistics & numerical data*; D013674:Technology, Dental / Q000706:statistics & numerical data; D013997:Time Factors
chemical_list: D003764:Dental Materials