Transfer accuracy of two indirect bonding techniques—an in vitro study with 3D scanned models
| Autor: | Wolfgang Recheis, Daniel Brenner, Adriano G. Crismani, Martin Brenner, Philipp Hofer-Picout, Johanna Schmid |
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| Rok vydání: | 2018 |
| Předmět: |
Intraoral scanner
Orthodontic Brackets 05 social sciences Bracket Dental Bonding Silicones Orthodontics 030206 dentistry Rotation Models Dental 03 medical and health sciences chemistry.chemical_compound Imaging Three-Dimensional 0302 clinical medicine Silicone chemistry Transfer (computing) 0502 economics and business Humans Torque In vitro study 050211 marketing In patient Biomedical engineering Mathematics |
| Zdroj: | European Journal of Orthodontics. 40:549-555 |
| ISSN: | 1460-2210 0141-5387 |
| Popis: | Background and objectives Indirect bonding (IDB) proved to be an effective method for appropriate bracket positioning in patients. Different methods and materials are available for fabricating transfer trays. This in vitro study was designed to measure and compare the transfer accuracy of two common IDB methods. Materials and methods Sixty stone models were fabricated and separated in two groups of 30 models each (15 working models, 15 patient models). After placing brackets on the working models, 30 IDB trays were made: 15 silicone (method I) and 15 double-vacuum forms (method II). With these trays, the brackets were transferred to the patient models. The bracket positions were scanned before and after the IDB procedure with an intraoral scanner. The linear and angular discrepancies were then determined digitally by measuring six different dimensions: occluso-cervical, mesio-distal, bucco-lingual, tip, rotation, and torque. Results The silicone trays showed fewer transfer discrepancies, on average, in all measured dimensions. There were significant differences between the methods in the occluso-cervical (P < 0.001), mesio-distal (P = 0.001), and torque (P = 0.044) dimensions. With both methods, 100 per cent of the horizontal and transversal measurements of both methods were within the clinically acceptable range of 0.25 mm. With method I, 98.5 per cent of the vertical and 95.9 per cent of the angular measurements were within the range of 0.25 mm and 1°, respectively. With method II, 94 per cent of the vertical and 84.8 per cent of the angular measurements were within the clinically acceptable range. Conclusions Although both transfer methods showed a high precision, silicone trays scored better in terms of accuracy than double-vacuum forms. |
| Databáze: | OpenAIRE |
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