Influence of preparation height and luting agent type on crown retention in molars

Authors

  • Marcelo Marchiori Uningá
  • Cezar Augusto Garbin Uningá
  • Lilian Rigo University of Pernambuco; Uningá
  • Daniel Becker Nunes Uningá
  • Genaro Marcial Mamani Gilapa Federal Technological University of Paraná

DOI:

https://doi.org/10.20396/bjos.v9i2.8641856

Keywords:

Crown retention, Luting agents, Preparation design

Abstract

Aim: Mechanical characteristics of the preparation along with luting agent are significant elements on the maintenance of fixed prostheses. This study aimed at assessing the retention of metal complete crowns luted with two different luting agents under different preparation height. Methods: Forty human third molars were selected and prepared to receive total crowns, and were randomly divided in 4 groups: (1) 5-mm preparation height (PH) and RelyX U100 self-adhesive resin cement (SA); (2) 5-mm PH and zinc phosphate (ZP); (3) 3-mm PH and SA; and (4) 3-mm PH and ZP. Crowns were cast in nickel-chromium alloy. The tensile strength was tested in a universal testing machine. Results: Mean tensile strength values to crown displacement (kgf) and standard deviation were 39.6 (13.0) for group 1; 16.9 (8.1) for group 2; 32.2 (7.9) for group 3; and 10.6 (3.2) for group 4. Overall, the crowns cemented with SA presented significantly higher mean tensile strength values than ZP, and the 5-mm PH presented significantly higher mean tensile strength values than 3-mm PH. Conclusions: The self-adhesive resin cement and higher preparation height improved crown retention.

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Author Biographies

Marcelo Marchiori, Uningá

Specialist in Dental Prosthesis, Postgraduate Program, Dental school, Uningá

Cezar Augusto Garbin, Uningá

PhD, Dental School, University of Pernambuco; Coordinator of the Postgraduate Program, Dental School, Uningá

Lilian Rigo, University of Pernambuco; Uningá

PhD, Dental School, University of Pernambuco; Professor of Scientific Methodology, Postgraduate Program, Dental school, Uningá

Daniel Becker Nunes, Uningá

Specialist in Dental Prosthesis, Postgraduate Program, Dental school, Uningá

Genaro Marcial Mamani Gilapa, Federal Technological University of Paraná

PhD, Professor, Electromechanical Production Engineering Course, Federal Technological University of Paraná

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Published

2015-11-25

How to Cite

1.
Marchiori M, Garbin CA, Rigo L, Nunes DB, Gilapa GMM. Influence of preparation height and luting agent type on crown retention in molars. Braz. J. Oral Sci. [Internet]. 2015 Nov. 25 [cited 2022 Nov. 30];9(2):89-93. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641856

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