Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study
Coronal torque is one of the key factors in orthodontic treatment. An adequate torque value has an impact on aesthetics and soft tissue profile. The aim of this quantitative, comparative and observational longitudinal cohort study was to analyze the efficacy of the maxillary central incisor coronal...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Dentistry Journal |
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| Online Access: | https://www.mdpi.com/2304-6767/11/8/186 |
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| author | Ana Catarina Oliveira Ana Sofia Rocha Rita Leitão Manuela Maia Teresa Pinho |
| author_facet | Ana Catarina Oliveira Ana Sofia Rocha Rita Leitão Manuela Maia Teresa Pinho |
| author_sort | Ana Catarina Oliveira |
| collection | DOAJ |
| description | Coronal torque is one of the key factors in orthodontic treatment. An adequate torque value has an impact on aesthetics and soft tissue profile. The aim of this quantitative, comparative and observational longitudinal cohort study was to analyze the efficacy of the maxillary central incisor coronal torque in the Invisalign<sup>®</sup> system and evaluate the relation between coronal torque movement and patient’s facial biotype. In total, 27 patients were selected. The planned movements (TP) were obtained from the Invisalign Doctor Site<sup>®</sup> using mathematical formulas that consider the T0 measurements. Pre-treatment (T0) and after full use of the first set of aligners (T1) scanners were evaluated using Geomagic<sup>®</sup> Control X <sup>TM</sup> by superimposing T0 and T1 models using a transverse plane and the long axis of the tooth crown. IBM<sup>®</sup> SPSS<sup>®</sup> software was used for statistical purposes. We found statistically significant differences between T0 and T1 in pro-inclination and retro-inclination, as well as between achieved and planned values in pro-inclination (<i>p</i> = 0.011). We verified that hyperdivergent clinical cases presented higher mean values of coronal torque, and hypodivergent cases presented lower values. In pro-inclination, the differences between the planned and achieved values were greater in hypodivergent cases and smaller in hyperdivergent cases. In retro-inclination, the differences between the planned and achieved values were greater in normodivergent cases and smaller in hypodivergent cases. This study highlights that inefficacy is more accentuated in pro-inclination. Aligners are an effective tool for producing coronal repercussions of torque movement, being more effective in retro-inclination. |
| first_indexed | 2024-03-11T00:00:41Z |
| format | Article |
| id | doaj.art-e52a4474fd084982a8131642692827c5 |
| institution | Directory Open Access Journal |
| issn | 2304-6767 |
| language | English |
| last_indexed | 2024-03-11T00:00:41Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Dentistry Journal |
| spelling | doaj.art-e52a4474fd084982a8131642692827c52023-11-19T00:47:09ZengMDPI AGDentistry Journal2304-67672023-08-0111818610.3390/dj11080186Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective StudyAna Catarina Oliveira0Ana Sofia Rocha1Rita Leitão2Manuela Maia3Teresa Pinho4UNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Science (IUCS), CESPU, 4585-116 Gandra, PortugalUNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Science (IUCS), CESPU, 4585-116 Gandra, PortugalUNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Science (IUCS), CESPU, 4585-116 Gandra, PortugalIPMAIA—Instituto Politécnico da Maia, Avenida Carlos de Oliveira Campos, Castêlo da Maia, 4475-690 Maia, PortugalUNIPRO—Oral Pathology and Rehabilitation Research Unit, University Institute of Health Science (IUCS), CESPU, 4585-116 Gandra, PortugalCoronal torque is one of the key factors in orthodontic treatment. An adequate torque value has an impact on aesthetics and soft tissue profile. The aim of this quantitative, comparative and observational longitudinal cohort study was to analyze the efficacy of the maxillary central incisor coronal torque in the Invisalign<sup>®</sup> system and evaluate the relation between coronal torque movement and patient’s facial biotype. In total, 27 patients were selected. The planned movements (TP) were obtained from the Invisalign Doctor Site<sup>®</sup> using mathematical formulas that consider the T0 measurements. Pre-treatment (T0) and after full use of the first set of aligners (T1) scanners were evaluated using Geomagic<sup>®</sup> Control X <sup>TM</sup> by superimposing T0 and T1 models using a transverse plane and the long axis of the tooth crown. IBM<sup>®</sup> SPSS<sup>®</sup> software was used for statistical purposes. We found statistically significant differences between T0 and T1 in pro-inclination and retro-inclination, as well as between achieved and planned values in pro-inclination (<i>p</i> = 0.011). We verified that hyperdivergent clinical cases presented higher mean values of coronal torque, and hypodivergent cases presented lower values. In pro-inclination, the differences between the planned and achieved values were greater in hypodivergent cases and smaller in hyperdivergent cases. In retro-inclination, the differences between the planned and achieved values were greater in normodivergent cases and smaller in hypodivergent cases. This study highlights that inefficacy is more accentuated in pro-inclination. Aligners are an effective tool for producing coronal repercussions of torque movement, being more effective in retro-inclination.https://www.mdpi.com/2304-6767/11/8/186incisortorquefacial biotypeclear alignerstooth movementInvisalign |
| spellingShingle | Ana Catarina Oliveira Ana Sofia Rocha Rita Leitão Manuela Maia Teresa Pinho Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study Dentistry Journal incisor torque facial biotype clear aligners tooth movement Invisalign |
| title | Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study |
| title_full | Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study |
| title_fullStr | Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study |
| title_full_unstemmed | Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study |
| title_short | Coronal Repercussions of the Maxillary Central Incisor Torque in the First Set of Aligners: A Retrospective Study |
| title_sort | coronal repercussions of the maxillary central incisor torque in the first set of aligners a retrospective study |
| topic | incisor torque facial biotype clear aligners tooth movement Invisalign |
| url | https://www.mdpi.com/2304-6767/11/8/186 |
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