Force behaviour of elastic chains during a simulated gap closure in extraction therapy cases

Objective Tooth movement with elastic chains requires defined force magnitudes. This study assessed the force behaviour of different elastic chains at different configurations of gap width. Methods Self‐ligating brackets of teeth 5 & 6 and 2 & 3 were bonded to two movable aluminium plates. T...

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Published in:Orthodontics & craniofacial research 2023-08, Vol.26 (3), p.433-441
Main Authors: Sabbagh, Hisham, Bamidis, Elias P., Keller, Alexander, Stocker, Thomas, Baumert, Uwe, Hoffmann, Lea, Wichelhaus, Andrea
Format: Article
Language:English
Subjects:
Aluminum
chain configuration
Cuspid
extraction therapy
gap closure
Orthodontic Brackets
orthodontic chains
Orthodontic Wires
Orthodontics
sliding mechanics
Tooth Movement Techniques - methods
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Summary:Objective Tooth movement with elastic chains requires defined force magnitudes. This study assessed the force behaviour of different elastic chains at different configurations of gap width. Methods Self‐ligating brackets of teeth 5 & 6 and 2 & 3 were bonded to two movable aluminium plates. The plates were positioned on a joint basis with varying distances of 0.5, 2.0, 4.0, 6.0, and 8.0 mm. Reset forces of open and closed chains from four different manufacturers were investigated in four different configurations. Configurations differed in either having an additional intermediate ring within the gap (#1, #3) and/or having intermediate rings between teeth adjacent to the gap (#1, #2), or by no intermediate rings (#4). Forces were measured with a universal testing machine. The results were statistically analysed using U‐test, H‐test and (if applicable) post‐hoc tests with a significance level of .05. Results Configurations #1 and #3, and #2 and #4 formed homogenous subgroups (P 
ISSN:1601-6335
1601-6343
DOI:10.1111/ocr.12626