Change in crown inclination accompanying initial tooth alignment with round archwires
ABSTRACT Objective: To evaluate, in-vitro, the change in crown inclination that occurs during orthodontic leveling and alignment using different archwire-bracket-ligation combinations. Materials and Methods: Four archwire types were tested: (1) 0.012-in stainless steel and (2) 0.0155-in stainless...
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| Format: | Article |
| Language: | English |
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Dental Press Editora
2022-07-01
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| Series: | Dental Press Journal of Orthodontics |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512022000300307&lng=en&tlng=en |
| _version_ | 1818523396658429952 |
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| author | Mona A. MONTASSER Ludger KEILIG Christoph BOURAUEL |
| author_facet | Mona A. MONTASSER Ludger KEILIG Christoph BOURAUEL |
| author_sort | Mona A. MONTASSER |
| collection | DOAJ |
| description | ABSTRACT Objective: To evaluate, in-vitro, the change in crown inclination that occurs during orthodontic leveling and alignment using different archwire-bracket-ligation combinations. Materials and Methods: Four archwire types were tested: (1) 0.012-in stainless steel and (2) 0.0155-in stainless steel multi-stranded, (3) 0.012-in nitinol Orthonol® and (4) 0.012-in nitinol Thermalloy®. Combinations with five types of 0.022-in slot orthodontic brackets were tested: SmartClipTM and Time3® self-ligating brackets, Mini-Taurus® and Victory SeriesTM conventional brackets, and Synergy® conventional-low friction bracket. Conventional brackets were ligated with both stainless steel and elastomeric ligatures. The simulated malocclusion comprised 2.0mm gingival and 2.0mm labial displacements of a maxillary right central incisor. Rotation around the Y-axis (representing labio-palatal inclination) was measured for the different archwire-bracket-ligation combinations. Results: The largest rotation was measured whith Orthonol® and Thermalloy® wires when combined with SmartClipTM brackets (8.07±0.24º and 8.06±0.26º, respectively) and with Synergy® brackets ligated with stainless steel ligatures (8.03±0.49º and 8.0±0.37º, respectively). The lower rotation was recorded when Thermalloy®, multi-stranded, and Orthonol® wires were ligated with elastomeric rings to Mini-Taurus® brackets (1.53±0.18º, 1.65± 0.23º and 1.70±0.28º, respectively) and to Victory SeriesTM brackets (1.68± 0.78º, 2.92± 1.40º and 1.74±0.46º, respectively). Conclusions: All archwire-bracket-ligation combinations produced lingual crown inclination; however, lower changes were observed when the conventional brackets were ligated with elastomeric rings. The multi-stranded archwire produced less rotation with nearly every bracket-ligation combination, compared to the other archwires. The effect of the archwire-bracket-ligation combination on tooth inclination during leveling and alignment should be considered during planning treatment mechanics. |
| first_indexed | 2024-12-11T05:44:26Z |
| format | Article |
| id | doaj.art-a4d7daa19b494b04a93593718090adb6 |
| institution | Directory Open Access Journal |
| issn | 2177-6709 |
| language | English |
| last_indexed | 2024-12-11T05:44:26Z |
| publishDate | 2022-07-01 |
| publisher | Dental Press Editora |
| record_format | Article |
| series | Dental Press Journal of Orthodontics |
| spelling | doaj.art-a4d7daa19b494b04a93593718090adb62022-12-22T01:19:02ZengDental Press EditoraDental Press Journal of Orthodontics2177-67092022-07-0127310.1590/2177-6709.27.3.e2220489.oarChange in crown inclination accompanying initial tooth alignment with round archwiresMona A. MONTASSERhttps://orcid.org/0000-0001-8101-5922Ludger KEILIGhttps://orcid.org/0000-0002-5950-9288Christoph BOURAUELhttps://orcid.org/0000-0002-2195-1011ABSTRACT Objective: To evaluate, in-vitro, the change in crown inclination that occurs during orthodontic leveling and alignment using different archwire-bracket-ligation combinations. Materials and Methods: Four archwire types were tested: (1) 0.012-in stainless steel and (2) 0.0155-in stainless steel multi-stranded, (3) 0.012-in nitinol Orthonol® and (4) 0.012-in nitinol Thermalloy®. Combinations with five types of 0.022-in slot orthodontic brackets were tested: SmartClipTM and Time3® self-ligating brackets, Mini-Taurus® and Victory SeriesTM conventional brackets, and Synergy® conventional-low friction bracket. Conventional brackets were ligated with both stainless steel and elastomeric ligatures. The simulated malocclusion comprised 2.0mm gingival and 2.0mm labial displacements of a maxillary right central incisor. Rotation around the Y-axis (representing labio-palatal inclination) was measured for the different archwire-bracket-ligation combinations. Results: The largest rotation was measured whith Orthonol® and Thermalloy® wires when combined with SmartClipTM brackets (8.07±0.24º and 8.06±0.26º, respectively) and with Synergy® brackets ligated with stainless steel ligatures (8.03±0.49º and 8.0±0.37º, respectively). The lower rotation was recorded when Thermalloy®, multi-stranded, and Orthonol® wires were ligated with elastomeric rings to Mini-Taurus® brackets (1.53±0.18º, 1.65± 0.23º and 1.70±0.28º, respectively) and to Victory SeriesTM brackets (1.68± 0.78º, 2.92± 1.40º and 1.74±0.46º, respectively). Conclusions: All archwire-bracket-ligation combinations produced lingual crown inclination; however, lower changes were observed when the conventional brackets were ligated with elastomeric rings. The multi-stranded archwire produced less rotation with nearly every bracket-ligation combination, compared to the other archwires. The effect of the archwire-bracket-ligation combination on tooth inclination during leveling and alignment should be considered during planning treatment mechanics.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512022000300307&lng=en&tlng=enInclinationTooth alignmentOrthodontic archwiresOrthodontic brackets |
| spellingShingle | Mona A. MONTASSER Ludger KEILIG Christoph BOURAUEL Change in crown inclination accompanying initial tooth alignment with round archwires Dental Press Journal of Orthodontics Inclination Tooth alignment Orthodontic archwires Orthodontic brackets |
| title | Change in crown inclination accompanying initial tooth alignment with round archwires |
| title_full | Change in crown inclination accompanying initial tooth alignment with round archwires |
| title_fullStr | Change in crown inclination accompanying initial tooth alignment with round archwires |
| title_full_unstemmed | Change in crown inclination accompanying initial tooth alignment with round archwires |
| title_short | Change in crown inclination accompanying initial tooth alignment with round archwires |
| title_sort | change in crown inclination accompanying initial tooth alignment with round archwires |
| topic | Inclination Tooth alignment Orthodontic archwires Orthodontic brackets |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512022000300307&lng=en&tlng=en |
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