Changes in third molar position after Class II subdivision malocclusion treatment with asymmetric extractions

Introduction This study aimed to assess the changes in third molars angulation and their available space after Class II subdivision malocclusion treatment with asymmetric premolar extractions. Methods The sample consisted of 37 patients (17 male, 20 female and mean age 13.18 ± 1.99 years) in group 1...

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Veröffentlicht in:Orthodontics & craniofacial research 2022-05, Vol.25 (2), p.226-233
Hauptverfasser: Janson, Guilherme, F. Almeida, JÃcssica, Valerio, Marcelo Vinicius, Velásquez, Gonzalo, Aliaga‐Del Castillo, Aron, Gamba Garib, Daniela
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container_issue 2
container_start_page 226
container_title Orthodontics & craniofacial research
container_volume 25
creator Janson, Guilherme
F. Almeida, JÃcssica
Valerio, Marcelo Vinicius
Velásquez, Gonzalo
Aliaga‐Del Castillo, Aron
Gamba Garib, Daniela
description Introduction This study aimed to assess the changes in third molars angulation and their available space after Class II subdivision malocclusion treatment with asymmetric premolar extractions. Methods The sample consisted of 37 patients (17 male, 20 female and mean age 13.18 ± 1.99 years) in group 1 (Type 1 Class II subdivision) and 25 (10 male, 15 female, mean age 13.56 ± 2.46 years) in group 2 (Type 2 Class II subdivision). In group 1, extractions were performed in the two maxillary quadrants and in the Class I mandibular quadrant. In group 2, extraction was performed in the Class II maxillary quadrant. Panoramic radiographs were used to evaluate third molar angulations and their available space pre‐ and post‐treatment. Radiographic measurements were performed with Dolphin® Imaging 11.9. Paired t tests were used for intragroup comparison between stages and sides. Results In Type 1, there were similar improvements in third molar angulations and increases in the space available on the extraction quadrants in the maxillary arch. In the mandibular arch, there was significantly greater improvement in angulation and greater space availability in the extraction quadrant after treatment. In Type 2, there was significantly greater improvement in angulation and available space for the maxillary third molar on the extraction quadrant. In the mandibular arch, there was a similar improvement in the available space for the third molars. Conclusions After treatment, both groups presented better angulation and significantly greater space for third molar eruptions on the extraction quadrants, when compared to the homologous non‐extraction quadrants.
doi_str_mv 10.1111/ocr.12530
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Almeida, JÃcssica ; Valerio, Marcelo Vinicius ; Velásquez, Gonzalo ; Aliaga‐Del Castillo, Aron ; Gamba Garib, Daniela</creator><creatorcontrib>Janson, Guilherme ; F. Almeida, JÃcssica ; Valerio, Marcelo Vinicius ; Velásquez, Gonzalo ; Aliaga‐Del Castillo, Aron ; Gamba Garib, Daniela</creatorcontrib><description>Introduction This study aimed to assess the changes in third molars angulation and their available space after Class II subdivision malocclusion treatment with asymmetric premolar extractions. Methods The sample consisted of 37 patients (17 male, 20 female and mean age 13.18 ± 1.99 years) in group 1 (Type 1 Class II subdivision) and 25 (10 male, 15 female, mean age 13.56 ± 2.46 years) in group 2 (Type 2 Class II subdivision). In group 1, extractions were performed in the two maxillary quadrants and in the Class I mandibular quadrant. In group 2, extraction was performed in the Class II maxillary quadrant. Panoramic radiographs were used to evaluate third molar angulations and their available space pre‐ and post‐treatment. Radiographic measurements were performed with Dolphin® Imaging 11.9. Paired t tests were used for intragroup comparison between stages and sides. Results In Type 1, there were similar improvements in third molar angulations and increases in the space available on the extraction quadrants in the maxillary arch. In the mandibular arch, there was significantly greater improvement in angulation and greater space availability in the extraction quadrant after treatment. In Type 2, there was significantly greater improvement in angulation and available space for the maxillary third molar on the extraction quadrant. In the mandibular arch, there was a similar improvement in the available space for the third molars. Conclusions After treatment, both groups presented better angulation and significantly greater space for third molar eruptions on the extraction quadrants, when compared to the homologous non‐extraction quadrants.</description><identifier>ISSN: 1601-6335</identifier><identifier>EISSN: 1601-6343</identifier><identifier>DOI: 10.1111/ocr.12530</identifier><identifier>PMID: 34402185</identifier><language>eng</language><publisher>England: Wiley Subscription Services, Inc</publisher><subject>Bicuspid - diagnostic imaging ; Bicuspid - surgery ; Cephalometry - methods ; Dental occlusion ; Female ; Humans ; Male ; malocclusion ; Malocclusion, Angle Class II - diagnostic imaging ; Malocclusion, Angle Class II - therapy ; Mandible ; Mandible - diagnostic imaging ; Maxilla ; Molar ; Molar, Third - diagnostic imaging ; Molars ; Teeth ; third molar ; Tooth Extraction</subject><ispartof>Orthodontics &amp; craniofacial research, 2022-05, Vol.25 (2), p.226-233</ispartof><rights>2021 The Authors. published by John Wiley &amp; Sons Ltd.</rights><rights>2021 The Authors. 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In group 1, extractions were performed in the two maxillary quadrants and in the Class I mandibular quadrant. In group 2, extraction was performed in the Class II maxillary quadrant. Panoramic radiographs were used to evaluate third molar angulations and their available space pre‐ and post‐treatment. Radiographic measurements were performed with Dolphin® Imaging 11.9. Paired t tests were used for intragroup comparison between stages and sides. Results In Type 1, there were similar improvements in third molar angulations and increases in the space available on the extraction quadrants in the maxillary arch. In the mandibular arch, there was significantly greater improvement in angulation and greater space availability in the extraction quadrant after treatment. In Type 2, there was significantly greater improvement in angulation and available space for the maxillary third molar on the extraction quadrant. 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Almeida, JÃcssica</au><au>Valerio, Marcelo Vinicius</au><au>Velásquez, Gonzalo</au><au>Aliaga‐Del Castillo, Aron</au><au>Gamba Garib, Daniela</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Changes in third molar position after Class II subdivision malocclusion treatment with asymmetric extractions</atitle><jtitle>Orthodontics &amp; craniofacial research</jtitle><addtitle>Orthod Craniofac Res</addtitle><date>2022-05</date><risdate>2022</risdate><volume>25</volume><issue>2</issue><spage>226</spage><epage>233</epage><pages>226-233</pages><issn>1601-6335</issn><eissn>1601-6343</eissn><abstract>Introduction This study aimed to assess the changes in third molars angulation and their available space after Class II subdivision malocclusion treatment with asymmetric premolar extractions. Methods The sample consisted of 37 patients (17 male, 20 female and mean age 13.18 ± 1.99 years) in group 1 (Type 1 Class II subdivision) and 25 (10 male, 15 female, mean age 13.56 ± 2.46 years) in group 2 (Type 2 Class II subdivision). In group 1, extractions were performed in the two maxillary quadrants and in the Class I mandibular quadrant. In group 2, extraction was performed in the Class II maxillary quadrant. Panoramic radiographs were used to evaluate third molar angulations and their available space pre‐ and post‐treatment. Radiographic measurements were performed with Dolphin® Imaging 11.9. Paired t tests were used for intragroup comparison between stages and sides. Results In Type 1, there were similar improvements in third molar angulations and increases in the space available on the extraction quadrants in the maxillary arch. In the mandibular arch, there was significantly greater improvement in angulation and greater space availability in the extraction quadrant after treatment. In Type 2, there was significantly greater improvement in angulation and available space for the maxillary third molar on the extraction quadrant. In the mandibular arch, there was a similar improvement in the available space for the third molars. 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subjects Bicuspid - diagnostic imaging
Bicuspid - surgery
Cephalometry - methods
Dental occlusion
Female
Humans
Male
malocclusion
Malocclusion, Angle Class II - diagnostic imaging
Malocclusion, Angle Class II - therapy
Mandible
Mandible - diagnostic imaging
Maxilla
Molar
Molar, Third - diagnostic imaging
Molars
Teeth
third molar
Tooth Extraction
title Changes in third molar position after Class II subdivision malocclusion treatment with asymmetric extractions
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