Transfer accuracy of two indirect bonding techniques-an in vitro study with 3D scanned models

European Journal of Orthodontics
Johanna SchmidAdriano G Crismani

Abstract

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. 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. 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 ...Continue Reading

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Citations

Sep 12, 2019·Dental press journal of orthodontics·Natalice Sousa de OliveiraHenrique Pretti
Aug 15, 2019·The Angle Orthodontist·Maria Eduarda Assad DuarteJosé Augusto Mendes Miguel
Jul 22, 2021·The Angle Orthodontist·Yasemin Nur Korkmaz, Semiha Arslan

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