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The Effect of Class II Elastic Forces on Craniofacial Growth in Rats

Department of Orthodontics, St. Louis University, 3556 Caroline Street, St. Louis, Missouri 63104

L.E. Johnston, Jr

Department of Orthodontics, St. Louis University, 3556 Caroline Street, St. Louis, Missouri 63104

Full-time Class II elastic forces were applied to eight rats in order to evaluate their effects on the growth of the snout and the mandible. Eight animals served as controls. Lateral cephalograms were taken at the start of the experiment and again at the end, 23 days later. The pre- and post-treatment tracings were superimposed on the cranial base to measure alterations in snout growth, and on metallic implants to measure differences in mandibular growth.

As judged by t tests, Class II elastic forces caused a significant antero-posterior growth inhibition both in the snout and in the mandible.

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Journal of Dental Research, Vol. 64, No. 1, 44-47 (1985)
DOI: 10.1177/00220345850640010801


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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Bakker, V.M. Articles by Johnston, L.E. Search for Related Content PubMed PubMed Citation Articles by Bakker, V.M. Articles by Johnston, L.E., Jr Social Bookmarking                         What's this?