Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation
Objective: This study investigated torque expression in maxillary incisors using two passive self-ligating bracket types (Damon Q and Pitts 21) placed at different heights using the Finite element method. Materials and methods: Two passive self-ligating brackets, Damon Q (Ormco, USA) and Pitts 21 (O...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Journal of Oral Biology and Craniofacial Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212426824000034 |
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| author | R.P Bernisha Gyanda Mishra G. Pradeep Raj Prasad Chitra |
| author_facet | R.P Bernisha Gyanda Mishra G. Pradeep Raj Prasad Chitra |
| author_sort | R.P Bernisha |
| collection | DOAJ |
| description | Objective: This study investigated torque expression in maxillary incisors using two passive self-ligating bracket types (Damon Q and Pitts 21) placed at different heights using the Finite element method. Materials and methods: Two passive self-ligating brackets, Damon Q (Ormco, USA) and Pitts 21 (OC Orthodontics, USA) were 3D modeled using micro-computed tomography. Damon Q (0.022ˮ x 0.028″ slot size) and Pitts 21 (0.021ˮ x 0.021″ slot size) brackets were placed on a maxillary central incisor at predetermined vertical heights. Arch wires of size 0.019ˮ x 0.025″ stainless steel (Damon Q) and 0.020ˮ x 0.020” Titanium Molybdenum (Pitts 21) were placed in the bracket slots. Results: Pitts 21 brackets showed higher torquing moments at all bonding heights as compared to Damon Q brackets. The minimum torquing moment was 9.03Nmm at 5 mm for Damon Q and the maximum torquing moment was 14.92Nmm for Pitts 21 at a bracket bonding height of 8 mm. Total deformation for Pitts 21 at a height of 5 mm from the incisal edge was 0.61 × 10−6mm as compared to that of Damon Q which was 0.41 × 10−6mm. Lowest Von Mises stress values were at 27.07 MPa in Damon Q brackets at a bracket height of 5 mm from the incisal edge. Highest Von Mises stress values were 36.80 MPa for Pitts 21 brackets at a bracket height of 8 mm from the incisal edge. Conclusion: Pitts 21 brackets exhibited superior torquing characteristics compared to Damon Q. Total deformation in Pitts 21 was higher than Damon Q at all tested bracket bonding heights. |
| format | Article |
| id | doaj-art-1658d35e309844f4b3052a4345c63aa7 |
| institution | Kabale University |
| issn | 2212-4268 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Oral Biology and Craniofacial Research |
| spelling | doaj-art-1658d35e309844f4b3052a4345c63aa72024-11-23T06:30:36ZengElsevierJournal of Oral Biology and Craniofacial Research2212-42682024-01-0114198106Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigationR.P Bernisha0Gyanda Mishra1G. Pradeep Raj2Prasad Chitra3Department of Orthodontics and Dentofacial Orthopaedics, Army College of Dental Sciences, Secunderabad, Telangana, 500087, IndiaDepartment of Orthodontics and Dentofacial Orthopaedics, Army College of Dental Sciences, Secunderabad, Telangana, 500087, IndiaDepartment of Orthodontics and Dentofacial Orthopaedics, Army College of Dental Sciences, Secunderabad, Telangana, 500087, IndiaCorresponding author.; Department of Orthodontics and Dentofacial Orthopaedics, Army College of Dental Sciences, Secunderabad, Telangana, 500087, IndiaObjective: This study investigated torque expression in maxillary incisors using two passive self-ligating bracket types (Damon Q and Pitts 21) placed at different heights using the Finite element method. Materials and methods: Two passive self-ligating brackets, Damon Q (Ormco, USA) and Pitts 21 (OC Orthodontics, USA) were 3D modeled using micro-computed tomography. Damon Q (0.022ˮ x 0.028″ slot size) and Pitts 21 (0.021ˮ x 0.021″ slot size) brackets were placed on a maxillary central incisor at predetermined vertical heights. Arch wires of size 0.019ˮ x 0.025″ stainless steel (Damon Q) and 0.020ˮ x 0.020” Titanium Molybdenum (Pitts 21) were placed in the bracket slots. Results: Pitts 21 brackets showed higher torquing moments at all bonding heights as compared to Damon Q brackets. The minimum torquing moment was 9.03Nmm at 5 mm for Damon Q and the maximum torquing moment was 14.92Nmm for Pitts 21 at a bracket bonding height of 8 mm. Total deformation for Pitts 21 at a height of 5 mm from the incisal edge was 0.61 × 10−6mm as compared to that of Damon Q which was 0.41 × 10−6mm. Lowest Von Mises stress values were at 27.07 MPa in Damon Q brackets at a bracket height of 5 mm from the incisal edge. Highest Von Mises stress values were 36.80 MPa for Pitts 21 brackets at a bracket height of 8 mm from the incisal edge. Conclusion: Pitts 21 brackets exhibited superior torquing characteristics compared to Damon Q. Total deformation in Pitts 21 was higher than Damon Q at all tested bracket bonding heights.http://www.sciencedirect.com/science/article/pii/S2212426824000034TorquePassive self-ligationOrthodontic bracketsIncisorBracket height |
| spellingShingle | R.P Bernisha Gyanda Mishra G. Pradeep Raj Prasad Chitra Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation Journal of Oral Biology and Craniofacial Research Torque Passive self-ligation Orthodontic brackets Incisor Bracket height |
| title | Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation |
| title_full | Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation |
| title_fullStr | Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation |
| title_full_unstemmed | Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation |
| title_short | Incisor torque expression characteristics in two passive self-ligating brackets placed at different heights. A finite element investigation |
| title_sort | incisor torque expression characteristics in two passive self ligating brackets placed at different heights a finite element investigation |
| topic | Torque Passive self-ligation Orthodontic brackets Incisor Bracket height |
| url | http://www.sciencedirect.com/science/article/pii/S2212426824000034 |
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