Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach
ABSTRACT Objective: The aim of the present study was to clarify the biomechanics of en-masse retraction of the upper anterior teeth and attempt to quantify the different forces and moments generated using mini-implants and to calculate the amount of applied force optimal for en-masse intrusion and...
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| Format: | Article |
| Language: | English |
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Dental Press Editora
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| Series: | Dental Press Journal of Orthodontics |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000500047&lng=en&tlng=en |
| _version_ | 1818484564774879232 |
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| author | A. Sumathi Felicita |
| author_facet | A. Sumathi Felicita |
| author_sort | A. Sumathi Felicita |
| collection | DOAJ |
| description | ABSTRACT Objective: The aim of the present study was to clarify the biomechanics of en-masse retraction of the upper anterior teeth and attempt to quantify the different forces and moments generated using mini-implants and to calculate the amount of applied force optimal for en-masse intrusion and retraction using mini-implants. Methods: The optimum force required for en-masse intrusion and retraction can be calculated by using simple mathematical formulae. Depending on the position of the mini-implant and the relationship of the attachment to the center of resistance of the anterior segment, different clinical outcomes are encountered. Using certain mathematical formulae, accurate measurements of the magnitude of force and moment generated on the teeth can be calculated for each clinical outcome. Results: Optimum force for en-masse intrusion and retraction of maxillary anterior teeth is 212 grams per side. Force applied at an angle of 5o to 16o from the occlusal plane produce intrusive and retraction force components that are within the physiologic limit. Conclusion: Different clinical outcomes are encountered depending on the position of the mini-implant and the length of the attachment. It is possible to calculate the forces and moments generated for any given magnitude of applied force. The orthodontist can apply the basic biomechanical principles mentioned in this study to calculate the forces and moments for different hypothetical clinical scenarios. |
| first_indexed | 2024-12-10T15:56:51Z |
| format | Article |
| id | doaj.art-1333c9a547db4463843d8689cc89847f |
| institution | Directory Open Access Journal |
| issn | 2177-6709 |
| language | English |
| last_indexed | 2024-12-10T15:56:51Z |
| publisher | Dental Press Editora |
| record_format | Article |
| series | Dental Press Journal of Orthodontics |
| spelling | doaj.art-1333c9a547db4463843d8689cc89847f2022-12-22T01:42:37ZengDental Press EditoraDental Press Journal of Orthodontics2177-6709225475510.1590/2177-6709.22.5.047-055.oarS2176-94512017000500047Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approachA. Sumathi FelicitaABSTRACT Objective: The aim of the present study was to clarify the biomechanics of en-masse retraction of the upper anterior teeth and attempt to quantify the different forces and moments generated using mini-implants and to calculate the amount of applied force optimal for en-masse intrusion and retraction using mini-implants. Methods: The optimum force required for en-masse intrusion and retraction can be calculated by using simple mathematical formulae. Depending on the position of the mini-implant and the relationship of the attachment to the center of resistance of the anterior segment, different clinical outcomes are encountered. Using certain mathematical formulae, accurate measurements of the magnitude of force and moment generated on the teeth can be calculated for each clinical outcome. Results: Optimum force for en-masse intrusion and retraction of maxillary anterior teeth is 212 grams per side. Force applied at an angle of 5o to 16o from the occlusal plane produce intrusive and retraction force components that are within the physiologic limit. Conclusion: Different clinical outcomes are encountered depending on the position of the mini-implant and the length of the attachment. It is possible to calculate the forces and moments generated for any given magnitude of applied force. The orthodontist can apply the basic biomechanical principles mentioned in this study to calculate the forces and moments for different hypothetical clinical scenarios.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000500047&lng=en&tlng=enOrtodontiaFechamento de espaço ortodônticoProcedimentos de ancoragem ortodôntica |
| spellingShingle | A. Sumathi Felicita Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach Dental Press Journal of Orthodontics Ortodontia Fechamento de espaço ortodôntico Procedimentos de ancoragem ortodôntica |
| title | Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach |
| title_full | Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach |
| title_fullStr | Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach |
| title_full_unstemmed | Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach |
| title_short | Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach |
| title_sort | quantification of intrusive retraction force and moment generated during en masse retraction of maxillary anterior teeth using mini implants a conceptual approach |
| topic | Ortodontia Fechamento de espaço ortodôntico Procedimentos de ancoragem ortodôntica |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512017000500047&lng=en&tlng=en |
| work_keys_str_mv | AT asumathifelicita quantificationofintrusiveretractionforceandmomentgeneratedduringenmasseretractionofmaxillaryanteriorteethusingminiimplantsaconceptualapproach |