2014
DOI: 10.1590/2176-9451.19.4.038-049.oar
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Influence of initial occlusal severity on time and efficiency of Class I malocclusion treatment carried out with and without premolar extractions

Abstract: IntroductionThe aim of this retrospective study was to compare the occlusal outcomes, duration and efficiency of Class I malocclusion treatment carried out with and without premolar extractions in patients with different degrees of initial malocclusion severity.MethodsComplete records of 111 patients were obtained and divided into two groups: Group 1 consisted of 65 patients at an initial mean age of 13.82 years old treated with four premolar extractions; whereas Group 2 consisted of 46 patients at an initial … Show more

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Cited by 8 publications
(9 citation statements)
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“…7 Increased treatment time was also reported among previous investigations following premolar extractions. 1,[9][10][11][12][13][14] However, evidence is still controversial about the significance of this association. 1,15,16 This correlation between premolar extraction and the orthodontic treatment time has been proposed because such procedures are usually performed for more complex cases, in addition to the need to perform a further surgical step to achieve adequate space closure.…”
Section: Discussionmentioning
confidence: 99%
“…7 Increased treatment time was also reported among previous investigations following premolar extractions. 1,[9][10][11][12][13][14] However, evidence is still controversial about the significance of this association. 1,15,16 This correlation between premolar extraction and the orthodontic treatment time has been proposed because such procedures are usually performed for more complex cases, in addition to the need to perform a further surgical step to achieve adequate space closure.…”
Section: Discussionmentioning
confidence: 99%
“…Despite controversy, 13-15 premolar extractions tend to increase treatment time. 4 , 5 , 8 , 12 , 14 , 16 , 17 Such an increase can be explained by an association between extractions and more complex cases, as well as the need of an additional treatment step aimed at space closure. 4 …”
Section: Types Of Malocclusion and Treatment Optionsmentioning
confidence: 99%
“…Most studies reveal Class II treatment associated with extractions lasts longer. 5 , 8 , 18 Class II treatment protocol encompassing extractions of two maxillary teeth not only results in better occlusal outcomes than the four-extraction protocol, but also shortens treatment time. 5 , 7 Class II treatment associated with four extractions requires more complex mechanics as well as more patient compliance.…”
Section: Types Of Malocclusion and Treatment Optionsmentioning
confidence: 99%
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“…For instance, the treatment will be longer if an extraction protocol is necessary 36 . Likewise, extraoral forces can be used in more complex situations such as significantly increased overjet, or when it is necessary to retract all the teeth in the arch, to limit mesial tooth displacement caused by premature extraction of temporary teeth, to redirect the growth pattern or to correct intermaxillary relationships 31 .…”
Section: Clinical Conditionsmentioning
confidence: 99%