Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial
Abstract Objective To compare the effects on facial soft tissues produced by maxillary expansion generated by rapid maxillary expansion (RME) versus slow maxillary expansion (SME). Materials and methods Patients in the mixed dentition were included with a transverse discrepancy between the two arche...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-01-01
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| Series: | Progress in Orthodontics |
| Online Access: | https://doi.org/10.1186/s40510-023-00498-9 |
| _version_ | 1827388076450643968 |
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| author | Matilde Marino Merlo Bernardo Quiroga Souki Michele Nieri Agnese Bonanno Veronica Giuntini James A. McNamara Jr. Lorenzo Franchi |
| author_facet | Matilde Marino Merlo Bernardo Quiroga Souki Michele Nieri Agnese Bonanno Veronica Giuntini James A. McNamara Jr. Lorenzo Franchi |
| author_sort | Matilde Marino Merlo |
| collection | DOAJ |
| description | Abstract Objective To compare the effects on facial soft tissues produced by maxillary expansion generated by rapid maxillary expansion (RME) versus slow maxillary expansion (SME). Materials and methods Patients in the mixed dentition were included with a transverse discrepancy between the two arches of at least 3 mm. A conventional RME screw was compared to a new expansion screw (Leaf expander) designed to produce SME. Both screws were incorporated in a fixed expander. The primary outcome was the difference of the facial tissue changes in the nasal area measured on facial 3D images captured immediately before application of the expander (T0) and after one year of retention, immediately after the expander removal (T1). Secondary outcomes were soft tissue changes of other facial regions (mouth, lips, and chin). Analysis of covariance was used for statistical analysis. Results Fourteen patients were allocated to the RME group, and 14 patients were allocated to the SME group. There were no dropouts. Nasal width change showed a difference between the two groups (1.3 mm greater in the RME group, 95% CI from 0.4 to 2.2, P = 0.005). Also, intercanthal width showed a difference between treatments (0.7 mm greater in the RME group, 95% CI from 0.0 to 1.3, P = 0.044). Nasal columella width, mouth width, nasal tip angle, upper lip angle, and lower lip angle did not show any statistically significant differences. The Y-axis (anterior–posterior) components of the nasal landmark showed a statistically significant difference between the two groups (0.5 mm of forward displacement greater in the RME group, 95% CI from 0.0 to 1.2, P = 0.040). Also, Z-axis (superior-inferior) components of the lower lip landmark was statistically significant (0.9 mm of downward displacement in favor of the RME group, 95% CI from 0.1 to 1.7, P = 0.027). All the other comparisons of the three-dimensional assessments were not statistically significant. Conclusions RME produced significant facial soft tissue changes when compared to SME. RME induced greater increases in both nasal and intercanthal widths (1.3 mm and 0.7 mm, respectively). These findings, though statistically significant, probably are not clinically relevant. Trial registration ISRCTN, ISRCTN18263886. Registered 8 November 2016, https://www.isrctn.com/ISRCTN18263886?q=Franchi&filters=&sort=&offset=2&totalResults=2&page=1&pageSize=10 |
| first_indexed | 2024-03-08T16:12:12Z |
| format | Article |
| id | doaj.art-46de6b28e047447e88049c635e159a6e |
| institution | Directory Open Access Journal |
| issn | 2196-1042 |
| language | English |
| last_indexed | 2024-03-08T16:12:12Z |
| publishDate | 2024-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Progress in Orthodontics |
| spelling | doaj.art-46de6b28e047447e88049c635e159a6e2024-01-07T12:49:19ZengSpringerOpenProgress in Orthodontics2196-10422024-01-012511910.1186/s40510-023-00498-9Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trialMatilde Marino Merlo0Bernardo Quiroga Souki1Michele Nieri2Agnese Bonanno3Veronica Giuntini4James A. McNamara Jr.5Lorenzo Franchi6Graduate Orthodontic Program, Department of Experimental and Clinical Medicine, The University of FlorenceGraduate Orthodontic Program, Pontifical Catholic University of Minas GeraisDepartment of Experimental and Clinical Medicine, Orthodontics, The University of FlorenceGraduate Orthodontic Program, Department of Experimental and Clinical Medicine, The University of FlorenceGraduate Orthodontic Program, Department of Experimental and Clinical Medicine, The University of FlorenceThomas M. and Doris Graber Endowed Professor of Dentistry Emeritus, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, The University of MichiganGraduate Orthodontic Program, Department of Experimental and Clinical Medicine, The University of FlorenceAbstract Objective To compare the effects on facial soft tissues produced by maxillary expansion generated by rapid maxillary expansion (RME) versus slow maxillary expansion (SME). Materials and methods Patients in the mixed dentition were included with a transverse discrepancy between the two arches of at least 3 mm. A conventional RME screw was compared to a new expansion screw (Leaf expander) designed to produce SME. Both screws were incorporated in a fixed expander. The primary outcome was the difference of the facial tissue changes in the nasal area measured on facial 3D images captured immediately before application of the expander (T0) and after one year of retention, immediately after the expander removal (T1). Secondary outcomes were soft tissue changes of other facial regions (mouth, lips, and chin). Analysis of covariance was used for statistical analysis. Results Fourteen patients were allocated to the RME group, and 14 patients were allocated to the SME group. There were no dropouts. Nasal width change showed a difference between the two groups (1.3 mm greater in the RME group, 95% CI from 0.4 to 2.2, P = 0.005). Also, intercanthal width showed a difference between treatments (0.7 mm greater in the RME group, 95% CI from 0.0 to 1.3, P = 0.044). Nasal columella width, mouth width, nasal tip angle, upper lip angle, and lower lip angle did not show any statistically significant differences. The Y-axis (anterior–posterior) components of the nasal landmark showed a statistically significant difference between the two groups (0.5 mm of forward displacement greater in the RME group, 95% CI from 0.0 to 1.2, P = 0.040). Also, Z-axis (superior-inferior) components of the lower lip landmark was statistically significant (0.9 mm of downward displacement in favor of the RME group, 95% CI from 0.1 to 1.7, P = 0.027). All the other comparisons of the three-dimensional assessments were not statistically significant. Conclusions RME produced significant facial soft tissue changes when compared to SME. RME induced greater increases in both nasal and intercanthal widths (1.3 mm and 0.7 mm, respectively). These findings, though statistically significant, probably are not clinically relevant. Trial registration ISRCTN, ISRCTN18263886. Registered 8 November 2016, https://www.isrctn.com/ISRCTN18263886?q=Franchi&filters=&sort=&offset=2&totalResults=2&page=1&pageSize=10https://doi.org/10.1186/s40510-023-00498-9 |
| spellingShingle | Matilde Marino Merlo Bernardo Quiroga Souki Michele Nieri Agnese Bonanno Veronica Giuntini James A. McNamara Jr. Lorenzo Franchi Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial Progress in Orthodontics |
| title | Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial |
| title_full | Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial |
| title_fullStr | Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial |
| title_full_unstemmed | Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial |
| title_short | Comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry: a randomized clinical trial |
| title_sort | comparison of the effects on facial soft tissues produced by rapid and slow maxillary expansion using stereophotogrammetry a randomized clinical trial |
| url | https://doi.org/10.1186/s40510-023-00498-9 |
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