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. 2019 May 1;7(2):46. doi: 10.3390/dj7020046

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Proportion of articles with examinations on animals in the Journal of Periodontology (JP) (a) and the Journal of Clinical Periodontology (JCP) (b) in 1982/83, and in JP (c) and JCP (d) in 2012/13. Some articles were classified in more than one category, leading to discrepancies between the number of articles published, as is shown in the diagrams.