Background: Recent literature has suggested that indirect bonding results in more accurate bracket placement. However, this more ideal positioning is of no use to the orthodontist unless the indirect bracket set-up is transferred accurately to the patient's dentition. This study aims to investigate the positional integrity of the indirect bonding transfer method of two commercially available tray types. Materials and Methods: Eighteen patients were randomly assigned to either a transparent tray light-cure or an opaque tray chemical-cure indirect bonding system. A total of 129 teeth were analyzed for the transparent tray group and 99 teeth for the opaque tray group. An intraoral scanner was used to generate three-dimension .stl models of each indirect set-up ("pre-transfer"� model) and each corresponding in-vivo bracketed patient arch ("post-transfer"� model). A comparison software was used to superimpose these models based on a surface best-fit algorithm. Bracket position differences were measured in three translational and three rotational planes of space to the nearest 1 �m. Statistical analysis was performed to compare the pre- and post-transfer bracket position, to detect any directional patterns of error, and to compare the transparent and opaque tray systems. Results: The indirect bonding transfer was found to be accurate for the data as a whole and for each tray type individually (p<0.0001). Final bracket position tended to be slightly more buccal and more occlusal for both groups compared to the set-up. This error was clinically insignificant but was more pronounced for the opaque tray group. Conclusions: Both indirect bonding methods transfer bracket position accurately in actual clinical use.
University of Minnesota M.S. thesis. July 2015. Major: Dentistry. Advisor: Brent Larson. 1 computer file (PDF); vi, 43 pages.
Accuracy of Two Indirect Bonding Transfer Methods: A Three-Dimensional, In-vivo analysis.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.