Mechanical evaluation of space closure loops in Orthodontics
This study evaluated the mechanical performance of teardrop-shaped loops and teardrop-shaped loops with helix used in orthodontic space closure. Sixty retraction loops made with 0.019" x 0.025" stainless steel (SS) and beta-titanium (BT) wires were used. They were attached to a testing mac...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Pesquisa Odontológica
2011-02-01
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| Series: | Brazilian Oral Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000100011 |
| _version_ | 1828739476115947520 |
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| author | Eduardo Uggeri Rodrigues Hiroshi Maruo Odilon Guariza Filho Orlando Tanaka Elisa Souza Camargo |
| author_facet | Eduardo Uggeri Rodrigues Hiroshi Maruo Odilon Guariza Filho Orlando Tanaka Elisa Souza Camargo |
| author_sort | Eduardo Uggeri Rodrigues |
| collection | DOAJ |
| description | This study evaluated the mechanical performance of teardrop-shaped loops and teardrop-shaped loops with helix used in orthodontic space closure. Sixty retraction loops made with 0.019" x 0.025" stainless steel (SS) and beta-titanium (BT) wires were used. They were attached to a testing machine to measure the magnitudes of the sagittal force and the load-deflection ratio necessary for 1 mm, 2 mm and 3 mm activation. The results demonstrated that the BT alloy presented significantly smaller mean values (p < 0.01) of sagittal force and load-deflection than the SS alloy. The loop with the highest mean value of sagittal force and load-deflection was the teardrop-shaped loop (p < 0.01). Differences were observed in the mean values of sagittal force and load-deflection among activations, and the highest mean value was found in the activation of 3 mm, while the smallest mean value was evident in the activation of 1 mm (p < 0.01). It could be concluded that the metallic alloy used and the presence of a helix in configuration of the loops may have a strong influence on the sagittal force produced and on the load-deflection ratio; the teardrop-shaped loops and teardrop-shaped loops with helix in BT presented the release of lighter forces; the teardrop-shaped loop in SS generated a high load-deflection ratio, providing high magnitudes of horizontal force during its deactivation. |
| first_indexed | 2024-04-13T00:23:05Z |
| format | Article |
| id | doaj.art-10a1fd5273f34beaa5780b49a676a181 |
| institution | Directory Open Access Journal |
| issn | 1806-8324 |
| language | English |
| last_indexed | 2024-04-13T00:23:05Z |
| publishDate | 2011-02-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj.art-10a1fd5273f34beaa5780b49a676a1812022-12-22T03:10:42ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1806-83242011-02-012516368Mechanical evaluation of space closure loops in OrthodonticsEduardo Uggeri RodriguesHiroshi MaruoOdilon Guariza FilhoOrlando TanakaElisa Souza CamargoThis study evaluated the mechanical performance of teardrop-shaped loops and teardrop-shaped loops with helix used in orthodontic space closure. Sixty retraction loops made with 0.019" x 0.025" stainless steel (SS) and beta-titanium (BT) wires were used. They were attached to a testing machine to measure the magnitudes of the sagittal force and the load-deflection ratio necessary for 1 mm, 2 mm and 3 mm activation. The results demonstrated that the BT alloy presented significantly smaller mean values (p < 0.01) of sagittal force and load-deflection than the SS alloy. The loop with the highest mean value of sagittal force and load-deflection was the teardrop-shaped loop (p < 0.01). Differences were observed in the mean values of sagittal force and load-deflection among activations, and the highest mean value was found in the activation of 3 mm, while the smallest mean value was evident in the activation of 1 mm (p < 0.01). It could be concluded that the metallic alloy used and the presence of a helix in configuration of the loops may have a strong influence on the sagittal force produced and on the load-deflection ratio; the teardrop-shaped loops and teardrop-shaped loops with helix in BT presented the release of lighter forces; the teardrop-shaped loop in SS generated a high load-deflection ratio, providing high magnitudes of horizontal force during its deactivation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000100011BiomechanicsOrthodontic Space ClosureStainless Steel |
| spellingShingle | Eduardo Uggeri Rodrigues Hiroshi Maruo Odilon Guariza Filho Orlando Tanaka Elisa Souza Camargo Mechanical evaluation of space closure loops in Orthodontics Brazilian Oral Research Biomechanics Orthodontic Space Closure Stainless Steel |
| title | Mechanical evaluation of space closure loops in Orthodontics |
| title_full | Mechanical evaluation of space closure loops in Orthodontics |
| title_fullStr | Mechanical evaluation of space closure loops in Orthodontics |
| title_full_unstemmed | Mechanical evaluation of space closure loops in Orthodontics |
| title_short | Mechanical evaluation of space closure loops in Orthodontics |
| title_sort | mechanical evaluation of space closure loops in orthodontics |
| topic | Biomechanics Orthodontic Space Closure Stainless Steel |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000100011 |
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