Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients
Abstract Background The interceptive treatment of Class II malocclusion using clear aligners is still debatable. This retrospective study analyzes the short-term occlusal and cephalometric effects in 40 growing patients with Class II malocclusion. Methods The sample was divided into 2 groups: Follow...
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BMC
2025-04-01
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| Series: | BMC Oral Health |
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| Online Access: | https://doi.org/10.1186/s12903-025-05893-8 |
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| author | Simonetta Meuli Davide Gentile Daniele Garcovich Luca Giuliante Edoardo Staderini Massimo Cordaro |
| author_facet | Simonetta Meuli Davide Gentile Daniele Garcovich Luca Giuliante Edoardo Staderini Massimo Cordaro |
| author_sort | Simonetta Meuli |
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| description | Abstract Background The interceptive treatment of Class II malocclusion using clear aligners is still debatable. This retrospective study analyzes the short-term occlusal and cephalometric effects in 40 growing patients with Class II malocclusion. Methods The sample was divided into 2 groups: Following the dentoalveolar expansion protocol, the first group was treated with clear aligners (GI). The second group was untreated (GN). Dental arches were scanned before and 1 year after the therapy. Similarly, linear measurements on digital casts and cephalometric ones on lateral X-rays were compared. Maxillary (Lmax), mandibular intermolar length (Lmand), and posterior transverse intermolar discrepancy (DIT) were evaluated. The distance between the mesiobuccal cusp of the upper first molar and the buccal groove of the first lower molar was considered at both sides (Cdx and Csx). The statistical descriptive analysis of T0 and T1 values was performed using a paired t-test, setting a p value < 0.05. Results A greater improvement in molar and skeletal Class II parameters in the GI group compared to the GN group was detected. Specifically, in GI, Lmax improved by 3.3 mm, Lmand by 1.1 mm, and DIT improved from − 2.1 mm to 0.1 mm, while Cdx and Csx decreased by 1.28 mm and 1.13 mm, respectively. In contrast, the GN group showed smaller improvements, with Lmax increasing by 1 mm, Lmand by 0.8 mm, DIT improving from − 2 mm to -1.8 mm, and both Cdx and Csx exhibiting slight increases of 0.04 mm and 0.09 mm, respectively. No statistically significant differences were observed regarding divergence or the correlation between skeletal and dental measurements. Conclusions Dentoalveolar expansion using Invisalign First appears effective and predictable with better outcomes than the control group. An improvement of skeletal Class II is detected in the treated group with dental improvements on maxillary arch. |
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| institution | OA Journals |
| issn | 1472-6831 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | BMC |
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| series | BMC Oral Health |
| spelling | doaj-art-d857a3df2f094d7c8ecabf3de48e9ec12025-08-20T02:10:53ZengBMCBMC Oral Health1472-68312025-04-012511910.1186/s12903-025-05893-8Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patientsSimonetta Meuli0Davide Gentile1Daniele Garcovich2Luca Giuliante3Edoardo Staderini4Massimo Cordaro5Postgraduate School of Orthodontics, Catholic University of the Sacred HeartPostgraduate School of Orthodontics, Catholic University of the Sacred HeartDepartment of Dentistry, Universidad Europea de ValenciaPostgraduate School of Orthodontics, Catholic University of the Sacred HeartPostgraduate School of Orthodontics, Catholic University of the Sacred HeartPostgraduate School of Orthodontics, Catholic University of the Sacred HeartAbstract Background The interceptive treatment of Class II malocclusion using clear aligners is still debatable. This retrospective study analyzes the short-term occlusal and cephalometric effects in 40 growing patients with Class II malocclusion. Methods The sample was divided into 2 groups: Following the dentoalveolar expansion protocol, the first group was treated with clear aligners (GI). The second group was untreated (GN). Dental arches were scanned before and 1 year after the therapy. Similarly, linear measurements on digital casts and cephalometric ones on lateral X-rays were compared. Maxillary (Lmax), mandibular intermolar length (Lmand), and posterior transverse intermolar discrepancy (DIT) were evaluated. The distance between the mesiobuccal cusp of the upper first molar and the buccal groove of the first lower molar was considered at both sides (Cdx and Csx). The statistical descriptive analysis of T0 and T1 values was performed using a paired t-test, setting a p value < 0.05. Results A greater improvement in molar and skeletal Class II parameters in the GI group compared to the GN group was detected. Specifically, in GI, Lmax improved by 3.3 mm, Lmand by 1.1 mm, and DIT improved from − 2.1 mm to 0.1 mm, while Cdx and Csx decreased by 1.28 mm and 1.13 mm, respectively. In contrast, the GN group showed smaller improvements, with Lmax increasing by 1 mm, Lmand by 0.8 mm, DIT improving from − 2 mm to -1.8 mm, and both Cdx and Csx exhibiting slight increases of 0.04 mm and 0.09 mm, respectively. No statistically significant differences were observed regarding divergence or the correlation between skeletal and dental measurements. Conclusions Dentoalveolar expansion using Invisalign First appears effective and predictable with better outcomes than the control group. An improvement of skeletal Class II is detected in the treated group with dental improvements on maxillary arch.https://doi.org/10.1186/s12903-025-05893-8Clear alignersGrowing patientsDigital orthodonticsInterceptive therapy |
| spellingShingle | Simonetta Meuli Davide Gentile Daniele Garcovich Luca Giuliante Edoardo Staderini Massimo Cordaro Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients BMC Oral Health Clear aligners Growing patients Digital orthodontics Interceptive therapy |
| title | Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients |
| title_full | Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients |
| title_fullStr | Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients |
| title_full_unstemmed | Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients |
| title_short | Correlation between transverse and sagittal dimensions in early stage: a retrospective study between patients treated with clear aligners and untreated patients |
| title_sort | correlation between transverse and sagittal dimensions in early stage a retrospective study between patients treated with clear aligners and untreated patients |
| topic | Clear aligners Growing patients Digital orthodontics Interceptive therapy |
| url | https://doi.org/10.1186/s12903-025-05893-8 |
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