Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up
Abstract Background Occlusal stability is one of the goals of orthodontic treatment, and keeping teeth aligned in the long term is a challenge for the orthodontist. This study aimed to compare the long-term incisors irregularity and dental arches dimensions changes in subjects treated with 4 premola...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-03-01
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| Series: | Progress in Orthodontics |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40510-023-00461-8 |
| _version_ | 1827982578368380928 |
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| author | Caroline Martins Gambardela-Tkacz Gabriela Alcaraz Paula Cotrin Karina Maria Salvatore de Freitas Willana Moura Guilherme Janson Daniela Garib Marcos Roberto de Freitas |
| author_facet | Caroline Martins Gambardela-Tkacz Gabriela Alcaraz Paula Cotrin Karina Maria Salvatore de Freitas Willana Moura Guilherme Janson Daniela Garib Marcos Roberto de Freitas |
| author_sort | Caroline Martins Gambardela-Tkacz |
| collection | DOAJ |
| description | Abstract Background Occlusal stability is one of the goals of orthodontic treatment, and keeping teeth aligned in the long term is a challenge for the orthodontist. This study aimed to compare the long-term incisors irregularity and dental arches dimensions changes in subjects treated with 4 premolar extractions with different pretreatment Little's irregularity index (LII). The knowledge of long-term outcomes is evidence-based information for the prognosis of future treatments. Methods In total, 41 treated subjects were divided into two groups according to mandibular Little irregularity value at pretreatment (mild or severe). The maxillary and mandibular LII, transversal, and longitudinal widths were assessed at pretreatment, posttreatment, and 37-year posttreatment. Chi-square and independent t tests were used for intergroup comparison. Results The groups presented similar behavior for all stages of maxillary and mandibular arch dimensions changes. Maxillary irregularity was corrected in both groups after treatment, and the alignment was acceptable in the long term. In the mild group, the mandibular incisor irregularity returned to pretreatment values in the long term. The mandibular LII increased in the severe group but did not return to pretreatment values in the long term. Conclusions The mild crowding group presented proportionally more relapse of mandibular incisor irregularity than the severe crowding group in the long term. Even so, the correction of mild and severe crowding with the extraction of 4 premolars showed satisfactory results in the long term, even with the presence of maturational changes and relapse. |
| first_indexed | 2024-04-09T22:35:08Z |
| format | Article |
| id | doaj.art-8ac611574e13406a85f62cdfa8319001 |
| institution | Directory Open Access Journal |
| issn | 2196-1042 |
| language | English |
| last_indexed | 2024-04-09T22:35:08Z |
| publishDate | 2023-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Progress in Orthodontics |
| spelling | doaj.art-8ac611574e13406a85f62cdfa83190012023-03-22T12:31:34ZengSpringerOpenProgress in Orthodontics2196-10422023-03-0124111010.1186/s40510-023-00461-8Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-upCaroline Martins Gambardela-Tkacz0Gabriela Alcaraz1Paula Cotrin2Karina Maria Salvatore de Freitas3Willana Moura4Guilherme Janson5Daniela Garib6Marcos Roberto de Freitas7Department of Orthodontics, Bauru Dental School, University of São PauloDepartment of Orthodontics, Bauru Dental School, University of São PauloDepartment of Orthodontics, Bauru Dental School, University of São PauloDepartment of Orthodontics, UNINGA University CenterDepartment of Orthodontics, Bauru Dental School, University of São PauloDepartment of Orthodontics, Bauru Dental School, University of São PauloDepartment of Orthodontics, Bauru Dental School, University of São PauloDepartment of Orthodontics, Bauru Dental School, University of São PauloAbstract Background Occlusal stability is one of the goals of orthodontic treatment, and keeping teeth aligned in the long term is a challenge for the orthodontist. This study aimed to compare the long-term incisors irregularity and dental arches dimensions changes in subjects treated with 4 premolar extractions with different pretreatment Little's irregularity index (LII). The knowledge of long-term outcomes is evidence-based information for the prognosis of future treatments. Methods In total, 41 treated subjects were divided into two groups according to mandibular Little irregularity value at pretreatment (mild or severe). The maxillary and mandibular LII, transversal, and longitudinal widths were assessed at pretreatment, posttreatment, and 37-year posttreatment. Chi-square and independent t tests were used for intergroup comparison. Results The groups presented similar behavior for all stages of maxillary and mandibular arch dimensions changes. Maxillary irregularity was corrected in both groups after treatment, and the alignment was acceptable in the long term. In the mild group, the mandibular incisor irregularity returned to pretreatment values in the long term. The mandibular LII increased in the severe group but did not return to pretreatment values in the long term. Conclusions The mild crowding group presented proportionally more relapse of mandibular incisor irregularity than the severe crowding group in the long term. Even so, the correction of mild and severe crowding with the extraction of 4 premolars showed satisfactory results in the long term, even with the presence of maturational changes and relapse.https://doi.org/10.1186/s40510-023-00461-8MalocclusionTooth extractionRecurrenceSecondary preventionLongitudinal studies |
| spellingShingle | Caroline Martins Gambardela-Tkacz Gabriela Alcaraz Paula Cotrin Karina Maria Salvatore de Freitas Willana Moura Guilherme Janson Daniela Garib Marcos Roberto de Freitas Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up Progress in Orthodontics Malocclusion Tooth extraction Recurrence Secondary prevention Longitudinal studies |
| title | Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up |
| title_full | Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up |
| title_fullStr | Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up |
| title_full_unstemmed | Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up |
| title_short | Incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding: a 37-year follow-up |
| title_sort | incisor irregularity and dental arch dimensions changes in subjects with different severity of anterior crowding a 37 year follow up |
| topic | Malocclusion Tooth extraction Recurrence Secondary prevention Longitudinal studies |
| url | https://doi.org/10.1186/s40510-023-00461-8 |
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