Treatment stability in patients with Class II malocclusion treated with 2 maxillary premolar extractions or without extractions

American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics
Guilherme JansonArnaldo Pinzan

Abstract

The purpose of this study was to compare the occlusal stability of Class II malocclusion treatment with and without extraction of 2 maxillary premolars. A sample of 59 records from patients with complete Class II malocclusion was used. This sample was divided into 2 groups with the following characteristics: group 1, comprising 29 patients treated without extractions, and group 2, comprising 30 patients treated with extraction of 2 maxillary premolars. Dental cast measurements were obtained before and after treatment and at a minimum of 2.4 years after treatment. The pretreatment, posttreatment, and postretention occlusal statuses were evaluated with the peer assesment rating index. The occlusal indexes at the postretention stage and the posttreatment changes and percentages of posttreatment changes were compared with t tests. The nonextraction and the 2 maxillary premolar extraction treatment protocols of complete Class II malocclusions had no statistically significant differences in occlusal stability. Finishing Class II malocclusion treatment with the molars in a Class II relationship has similar occlusal stability as finishing with the molars in a Class I relationship.

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Citations

Dec 2, 2015·European Journal of Orthodontics·Guilherme JansonDaniela Gamba Garib
Aug 14, 2012·Journal of Oral Rehabilitation·M Wang, N Mehta
Dec 31, 2014·Progress in Orthodontics·Guilherme JansonLeonardo T Camardella
Oct 30, 2016·The Angle Orthodontist·Sabrina Maniewicz Maniewicz WinsStavros Kiliaridis
Nov 2, 2016·The Angle Orthodontist·Paloma González-Gil de BernabéCarlos Bellot-Arcís
Nov 23, 2013·Dental press journal of orthodontics·Marisana Piano SebenAristeu Correa Bittencourt Neto
Mar 2, 2011·Brazilian Oral Research·Leandro Silva MarquesAna Maria Bolognese
Jul 27, 2017·Dental press journal of orthodontics·David Normando, Guilherme Janson
Jun 14, 2015·European Journal of Orthodontics·Guilherme JansonDaniela Gamba Garib
Jun 13, 2021·British Dental Journal·Declan Millett

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