Determination of root dentin and cementum micro hardness

Authors

  • Fabiano Ribeiro Cirano Department of Stomatology, Periodontics division University of São Paulo
  • Giuseppe Alexandre Romito Department of Stomatology, Periodontics division University of São Paulo
  • José Hildebrando Todescan Department of Stomatology, Periodontics division University of São Paulo

DOI:

https://doi.org/10.20396/bjos.v3i8.8641738

Keywords:

Micro hardness. Root dentin. Cementum

Abstract

Vickers micro hardness was assessed on root dentin and cementum in 30 canines obtained from the Periodontics Discipline tooth bank. Crown and cervical portion of the root were discarded by a transverse section situated 3mm, apically, from the cemento-enamel junction on the buccal surface, thus obtaining the root specimen. On root dentin, mean micro hardness values were obtained for 3 regions: (DR1) from 0.05 to 0.1 mm of the cemento dentin junction – 30.64 VHN; (DR2) from 0.3 to 0.5 mm of the cemento dentin junction – 56.92 VHN and (DR3) from 0.8 to 1.0 mm of the cemento dentin junction – 32.70 VHN. After statistical analysis (Variance Analysis test, p < 0,05), we conclude that micro hardness at the DR2 region was statistically greater than that at the DR3 region which was, in turn, greater than that at the DR1 region. The mean micro hardness of cementum was 19.70 VHN.

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Author Biographies

Fabiano Ribeiro Cirano, Department of Stomatology, Periodontics division University of São Paulo

graduate at Odontologia from Universidade de São Paulo (1996), master's at Periodontology from Universidade de São Paulo (2002) and ph.d. at Periodontology from Universidade de São Paulo (2007). Has experience in Odontology, focusing on Clinical Odontology, acting on the following subjects: periodontia, dentina - microdureza, esmalte dentário - microdureza, titanium and osseointegration.

Giuseppe Alexandre Romito, Department of Stomatology, Periodontics division University of São Paulo

Graduate at Dentistry from Universidade de São Paulo (1992), master's at Periodontology from Universidade de São Paulo (1996) and ph.d. at Periodontology from Universidade de São Paulo (2000). Has experience in Odontology, focusing on Periodontology, acting on the following subjects: periodontiacs - periodontal disease, periodontal medicine and implants. Chairman of Peiodontic Division at Dental School of University of São Paulo. President of the IADR Brazilian Division (2011-2012). President of the Brazilian Society of Periodontology (2008-2010).

José Hildebrando Todescan, Department of Stomatology, Periodontics division University of São Paulo

Graduado em Odontologia pela Universidade de São Paulo (1954), fez Doutorado em Odontologia (Periodontia) pela Universidade de São Paulo (1971), com Especialização em Prótese Dental pelo Conselho Regional de Odontologia (1974), Especialização em Periodontia pelo Conselho Regional de Odontologia (1975), Livre Docente pela Universidade de São Paulo (1983), Professor Adjunto pela Universidade de São Paulo ( 1986 por concurso), Professor Associado pela Universidade de São Paulo (1990), Professor Titular de Periodontia no Departamento de Estomatologia, da Universidade de São Paulo, (1992). 

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Published

2015-11-13

How to Cite

1.
Cirano FR, Romito GA, Todescan JH. Determination of root dentin and cementum micro hardness. Braz. J. Oral Sci. [Internet]. 2015 Nov. 13 [cited 2022 Oct. 6];3(8):420-4. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641738

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