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- W93853013 abstract "Introduction: Controversy exists in literature regarding facial esthetics with extraction and non-extraction treatment. Purpose: The purpose of this study is to provide an evidence-based answer to the question: whether or not the extraction of premolars during orthodontic treatment will improve or harm the esthetics of the resulting soft tissue facial profile. This longitudinal study investigates changes in the soft tissue profile after treatment and again 25+ years later. Methods: Cephalometric films were traced on a sample of 57 untreated individuals and a sample of 47 individuals treated with extractions. The mean ages of the untreated sample were 16 years 0 months and 56 years and 8 months respectively and were matched to the mean ages of an extraction treated sample, 15 years 11 months and 39 years and 4 months respectively. Descriptive statistics were collected and individual t-tests were performed for the purpose of comparison and contrast. Results: The results show that without treatment, the soft tissue profile generally changes in a downward and forward manner. With extraction treatment, the downward change which would otherwise happen due to growth is less and the soft tissue change is mainly forward. This study also shows that the soft tissue profiles 25+ years post treatment for both the untreated and extraction treated samples are similar and considered esthetically acceptable. Conclusions: 1) There is no substantive esthetic difference between the untreated and extraction treated samples. 2) There are important different directional changes for the soft tissue profiles of untreated and extraction treated individuals. 3) The changes for the untreated sample are greatest for the lips and chin and change in a downward and forward direction. 4) The changes for" @default.
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- W93853013 date "2012-01-01" @default.
- W93853013 modified "2023-09-26" @default.
- W93853013 title "A longitudinal cephalometric study evaluating the soft tissue profiles of patients treated with extraction mechanics 25 years post-treatment" @default.
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