Influence of premolar extractions on the facial profile evaluated by the Holdaway Analysis

Authors

  • Susiane Allgayer Pontifícia Universidade Católica do Rio Grande do Sul
  • Eduardo Martinelli Santayana de Lima Pontifícia Universidade Católica do Rio Grande do Sul
  • Maurício Barbieri Mezomo UNIFRA

Keywords:

Dental extraction, premolar tooth, corrective orthodontics

Abstract

Purpose: This retrospective study aimed at assessing patients treated with extraction of premolars through cephalometry in lateral teleradiography, comparing the effect of different tooth extraction protocols on the facial profile. Methods: For this study, 87 patients (31 boys and 56 girls) were selected from the private practices of three dentists certified by the Brazilian Board of Orthodontics and Facial Orthopedics. These patients were treated with fixed edgewise appliance and divided into three groups, according to the sequence in which premolars were extracted "Group 40" comprised 22 patients treated with extractions of the first two superior premolars, adopted as the control group; "Group 44" comprised 43 patients treated with extractions of the four first premolars; and "Group 45" comprised 22 patients treated with extractions of first superior premolars and second inferior premolars. The Holdaway analysis was used to quantify and compare the group profiles before and after treatment. Results: Student’s t-tests showed a profile improvement in all groups. When groups were compared, ANOVA showed that only the Inferior sulcus to the H line showed differences in incremental changes resulting from the treatment. Group 44 showed a significantly higher difference than Group 40. Conclusion: We conclude that the protocols produce similar facial appearances.

Author Biographies

Susiane Allgayer, Pontifícia Universidade Católica do Rio Grande do Sul

DDS, MSD. Department of Orthodontics, Pontifícia Universidade Católica do Rio Grande do Sul,Porto Alegre, RS, Brazil.

Eduardo Martinelli Santayana de Lima, Pontifícia Universidade Católica do Rio Grande do Sul

DDS, MSD, PhD. Professor, Department of Orthodontics, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil.

Maurício Barbieri Mezomo, UNIFRA

DDS., MS., Professor, Department of Orthodontics, UNIFRA, Santa Maria, Rio Grande do Sul, Brazil.

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Published

2010-11-04

Issue

Vol. 26 No. 1 (2011)

Section

Original Article

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