About Bioline  All Journals  Testimonials  Membership  News  Donations

Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN: 1677-3225
Vol. 3, No. 9, 2004, pp. 454-457
Bioline Code: os04014
Full paper language: English
Document type: Research Article
Document available free of charge

Brazilian Journal of Oral Sciences, Vol. 3, No. 9, 2004, pp. 454-457

 en Methods of evaluation of mandible posterior segment
Haroldo Amorin De Almeida; Maria Helena Castro De Almeida; João Sarmento Pereira-Neto; Maria Beatriz Borges De Araújo; Stenyo Wanderley Tavares & Fábio Lourenço Romano


The aim of this research was to compare three methods to evaluate the availability of existent space in the mandible posterior segment; the methods are the Merrifield's (1986), Ricketts' (1976) and Richardson's (1992). Sixty 60 teleradiographs in lateral pattern, from head, belonging to 60 Brazilian leucoderm subjects were evaluated. The age range from 9 to 19 years, all having a mal-occlusion of Class II, division 1, equally separated as for the gender (being 30 of male gender and 30 of female gender). It was concluded: Evidence of growing in the mandible arch posterior segment in the age range studied, with mean values of 10,21 mm for the Merrifield, 11,21 mm for the Richardson and 17,84 mm for the Ricketts methods. We have concluded that irrespective of the evaluated method, it was verified that the female gender has a more precocious growing (12,17 mm) as compared to the male gender (8,81 mm), in the ages 9 to 12. In the correlation between the employed methods, there was no a statistical difference among themselves by the t test, in the level of 1% (p £ 0,01).

orthodontics, cephalometric, diagnostic

© Copyright 2004 - Piracicaba Dental School - UNICAMP São Paulo - Brazil
Alternative site location:

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2018, Site last up-dated on 24-Sep-2018.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil