2016
DOI: 10.1590/2177-6709.21.4.050-059.oar
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Abstract: Objective: To compare soft tissue changes in Class I borderline cases treated with extraction and nonextraction modalities. Methods: A parent sample of 150 patients with Class I dental and skeletal malocclusion (89 patients treated with premolar extraction and 61 patients without extraction) was randomly selected and subjected to discriminant analysis which identified the borderline sample of 44 patients (22 extraction and 22 nonextraction patients). Pretreatment and post-treatment cephalograms of the borderli… Show more

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Cited by 15 publications
(8 citation statements)
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“…In the present study, both upper and lower lip thicknesses significantly increased in both extraction groups compared to the nonextraction group, and might be related to the loss of tension in the upper and lower lips following the retraction of anterior teeth. According to the results of the present study, the nasolabial angle did not show a significant change in extraction groups, similar to the study by Kirschneck et al 4 , contrary to the results of other studies 20,28,32 that showed a significant increase in this angle. The differences in soft tissue changes, due to extraction or non-extraction treatment between different studies, may depend on the characteristics of the patients studied, sample size, the prescription used, anchorage considerations, and treatment mechanics.…”
Section: Discussionsupporting
confidence: 76%
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“…In the present study, both upper and lower lip thicknesses significantly increased in both extraction groups compared to the nonextraction group, and might be related to the loss of tension in the upper and lower lips following the retraction of anterior teeth. According to the results of the present study, the nasolabial angle did not show a significant change in extraction groups, similar to the study by Kirschneck et al 4 , contrary to the results of other studies 20,28,32 that showed a significant increase in this angle. The differences in soft tissue changes, due to extraction or non-extraction treatment between different studies, may depend on the characteristics of the patients studied, sample size, the prescription used, anchorage considerations, and treatment mechanics.…”
Section: Discussionsupporting
confidence: 76%
“…Similarly, the distance from the lower lip to the aesthetic line significantly increased more in the extraction group due to incisor retraction compared to the non-extraction group in the study by Kirschneck et al 4 Yashwant et al 28 compared soft tissue changes in Class I borderline patients treated with either extraction or non-extraction modalities. According to their results, upper and lower lips were more retracted, and the thickness of the upper lip increased more in borderline extraction cases.…”
Section: Discussionmentioning
confidence: 94%
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“…The adverse effects hypothesized with extraction treatment plan are dished in profile, increased width of the buccal corridor, narrow dental arches, etc while non-extraction was hypothesized with poor stability and protrusive profile in borderline cases [4].…”
Section: Introductionmentioning
confidence: 99%
“…Pre-surgical planning focuses on the initial stability of the facial tissues, so the static condition is one of the parameters included, whereas the dynamic position of facial tissues can bring about changes in the results of facial proportion and normality. To this end, the use of new tools that can analyze facial soft tissues in static and dynamic phases is critical (Yashwant et al, 2016).…”
Section: Introductionmentioning
confidence: 99%