Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness
OBJECTIVE: This study aimed to measure insertion torque, tip mechanical resistance to fracture and transmucosal neck of mini-implants (MI) (Conexão Sistemas de PróteseT), as well as to analyze surface morphology. METHODS: Mechanical tests were carried out to measure the insertion torque of MIs in di...
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| Format: | Article |
| Language: | English |
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Dental Press Editora
2014-06-01
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| Series: | Dental Press Journal of Orthodontics |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512014000300090&lng=en&tlng=en |
| _version_ | 1818056413774086144 |
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| author | Renata de Faria Santos Antonio Carlos de Oliveira Ruellas Daniel Jogaib Fernandes Carlos Nelson Elias |
| author_facet | Renata de Faria Santos Antonio Carlos de Oliveira Ruellas Daniel Jogaib Fernandes Carlos Nelson Elias |
| author_sort | Renata de Faria Santos |
| collection | DOAJ |
| description | OBJECTIVE: This study aimed to measure insertion torque, tip mechanical resistance to fracture and transmucosal neck of mini-implants (MI) (Conexão Sistemas de PróteseT), as well as to analyze surface morphology. METHODS: Mechanical tests were carried out to measure the insertion torque of MIs in different cortical thicknesses, and tip mechanical resistance to fracture as well as transmucosal neck of MIs. Surface morphology was assessed by scanning electron microscopy (SEM) before and after the mechanical tests. RESULTS: Values of mechanical resistance to fracture (22.14 N.cm and 54.95 N.cm) were higher and statistically different (P < 0.05) from values of insertion torque for 1-mm (7.60 N.cm) and 2-mm (13.27 N.cm) cortical thicknesses. Insertion torque was statistically similar (P > 0.05) to torsional fracture in the tip of MI (22.14 N.cm) when 3 mm cortical thickness (16.11 N.cm) and dense bone (23.95 N.cm) were used. Torsional fracture of the transmucosal neck (54.95 N.cm) was higher and statistically different (P < 0.05) from insertion torsional strength in all tested situations. SEM analysis showed that the MIs had the same smooth surface when received from the manufacturer and after the mechanical tests were performed. Additionally, no significant marks resulting from the manufacturing process were observed. CONCLUSION: All mini-implants tested presented adequate surface morphology. The resistance of mini-implants to fracture safely allows placement in 1 and 2-mm cortical thickness. However, in 3-mm cortical thickness and dense bones, pre-drilling with a bur is recommended before insertion. |
| first_indexed | 2024-12-10T12:28:27Z |
| format | Article |
| id | doaj.art-46c16940c7904ea9ab6db131c1da48d5 |
| institution | Directory Open Access Journal |
| issn | 2177-6709 |
| language | English |
| last_indexed | 2024-12-10T12:28:27Z |
| publishDate | 2014-06-01 |
| publisher | Dental Press Editora |
| record_format | Article |
| series | Dental Press Journal of Orthodontics |
| spelling | doaj.art-46c16940c7904ea9ab6db131c1da48d52022-12-22T01:48:53ZengDental Press EditoraDental Press Journal of Orthodontics2177-67092014-06-01193909410.1590/2176-9451.19.3.090-094.oarS2176-94512014000300090Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thicknessRenata de Faria SantosAntonio Carlos de Oliveira RuellasDaniel Jogaib FernandesCarlos Nelson EliasOBJECTIVE: This study aimed to measure insertion torque, tip mechanical resistance to fracture and transmucosal neck of mini-implants (MI) (Conexão Sistemas de PróteseT), as well as to analyze surface morphology. METHODS: Mechanical tests were carried out to measure the insertion torque of MIs in different cortical thicknesses, and tip mechanical resistance to fracture as well as transmucosal neck of MIs. Surface morphology was assessed by scanning electron microscopy (SEM) before and after the mechanical tests. RESULTS: Values of mechanical resistance to fracture (22.14 N.cm and 54.95 N.cm) were higher and statistically different (P < 0.05) from values of insertion torque for 1-mm (7.60 N.cm) and 2-mm (13.27 N.cm) cortical thicknesses. Insertion torque was statistically similar (P > 0.05) to torsional fracture in the tip of MI (22.14 N.cm) when 3 mm cortical thickness (16.11 N.cm) and dense bone (23.95 N.cm) were used. Torsional fracture of the transmucosal neck (54.95 N.cm) was higher and statistically different (P < 0.05) from insertion torsional strength in all tested situations. SEM analysis showed that the MIs had the same smooth surface when received from the manufacturer and after the mechanical tests were performed. Additionally, no significant marks resulting from the manufacturing process were observed. CONCLUSION: All mini-implants tested presented adequate surface morphology. The resistance of mini-implants to fracture safely allows placement in 1 and 2-mm cortical thickness. However, in 3-mm cortical thickness and dense bones, pre-drilling with a bur is recommended before insertion.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512014000300090&lng=en&tlng=enTorqueProcedimentos de ancoragem ortodônticaMateriais biomédicos e odontológicos |
| spellingShingle | Renata de Faria Santos Antonio Carlos de Oliveira Ruellas Daniel Jogaib Fernandes Carlos Nelson Elias Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness Dental Press Journal of Orthodontics Torque Procedimentos de ancoragem ortodôntica Materiais biomédicos e odontológicos |
| title | Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness |
| title_full | Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness |
| title_fullStr | Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness |
| title_full_unstemmed | Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness |
| title_short | Insertion torque versus mechanical resistance of mini- implants inserted in different cortical thickness |
| title_sort | insertion torque versus mechanical resistance of mini implants inserted in different cortical thickness |
| topic | Torque Procedimentos de ancoragem ortodôntica Materiais biomédicos e odontológicos |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2176-94512014000300090&lng=en&tlng=en |
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