Force system generated by an adjustable molar root movement mechanism

Rodrigo F. Viecilli, Jie Chen, Thomas Katona, W. Eugene Roberts

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Introduction: Tooth movement simulation is important for planning the optimal force system and appliance design to correct a specific malocclusion. Experimental verification of a 3-dimensional force system is described for a unique molar root movement strategy that can be adapted to many clinical scenarios. Methods: The force system was measured for molar root movement springs that had adjustable alpha (anterior) and beta (posterior) moments. A 3-dimensional transducer assessed moments and forces in 3 planes during deactivation and simulated molar rotation. Two experimental situations were compared by using 10 springs in each group: spring reactivation was performed to compensate for changes in the force system caused by molar movement, or there was no reactivation. Results: Without reactivation, the force system becomes unfavorable after approximately 5° of molar movement (rotation). With reactivations, a favorable force system through 20° of molar movement is maintained. Conclusions: Present root-movement appliances require periodic adjustment to achieve optimal tooth movement. Additional studies are needed to design orthodontic appliances for delivering optimal force systems for the entire range of tooth movement.

Original languageEnglish (US)
Pages (from-to)165-173
Number of pages9
JournalAmerican Journal of Orthodontics and Dentofacial Orthopedics
Volume135
Issue number2
DOIs
StatePublished - Feb 2009

Fingerprint

Tooth Movement Techniques
Orthodontic Appliance Design
Malocclusion
Transducers

ASJC Scopus subject areas

  • Orthodontics

Cite this

Force system generated by an adjustable molar root movement mechanism. / Viecilli, Rodrigo F.; Chen, Jie; Katona, Thomas; Roberts, W. Eugene.

In: American Journal of Orthodontics and Dentofacial Orthopedics, Vol. 135, No. 2, 02.2009, p. 165-173.

Research output: Contribution to journalArticle

Viecilli, Rodrigo F. ; Chen, Jie ; Katona, Thomas ; Roberts, W. Eugene. / Force system generated by an adjustable molar root movement mechanism. In: American Journal of Orthodontics and Dentofacial Orthopedics. 2009 ; Vol. 135, No. 2. pp. 165-173.
@article{c3b6017707604ec4b74eb2258d799331,
title = "Force system generated by an adjustable molar root movement mechanism",
abstract = "Introduction: Tooth movement simulation is important for planning the optimal force system and appliance design to correct a specific malocclusion. Experimental verification of a 3-dimensional force system is described for a unique molar root movement strategy that can be adapted to many clinical scenarios. Methods: The force system was measured for molar root movement springs that had adjustable alpha (anterior) and beta (posterior) moments. A 3-dimensional transducer assessed moments and forces in 3 planes during deactivation and simulated molar rotation. Two experimental situations were compared by using 10 springs in each group: spring reactivation was performed to compensate for changes in the force system caused by molar movement, or there was no reactivation. Results: Without reactivation, the force system becomes unfavorable after approximately 5° of molar movement (rotation). With reactivations, a favorable force system through 20° of molar movement is maintained. Conclusions: Present root-movement appliances require periodic adjustment to achieve optimal tooth movement. Additional studies are needed to design orthodontic appliances for delivering optimal force systems for the entire range of tooth movement.",
author = "Viecilli, {Rodrigo F.} and Jie Chen and Thomas Katona and Roberts, {W. Eugene}",
year = "2009",
month = "2",
doi = "10.1016/j.ajodo.2007.02.058",
language = "English (US)",
volume = "135",
pages = "165--173",
journal = "American Journal of Orthodontics and Dentofacial Orthopedics",
issn = "0889-5406",
publisher = "Mosby Inc.",
number = "2",

}

TY - JOUR

T1 - Force system generated by an adjustable molar root movement mechanism

AU - Viecilli, Rodrigo F.

AU - Chen, Jie

AU - Katona, Thomas

AU - Roberts, W. Eugene

PY - 2009/2

Y1 - 2009/2

N2 - Introduction: Tooth movement simulation is important for planning the optimal force system and appliance design to correct a specific malocclusion. Experimental verification of a 3-dimensional force system is described for a unique molar root movement strategy that can be adapted to many clinical scenarios. Methods: The force system was measured for molar root movement springs that had adjustable alpha (anterior) and beta (posterior) moments. A 3-dimensional transducer assessed moments and forces in 3 planes during deactivation and simulated molar rotation. Two experimental situations were compared by using 10 springs in each group: spring reactivation was performed to compensate for changes in the force system caused by molar movement, or there was no reactivation. Results: Without reactivation, the force system becomes unfavorable after approximately 5° of molar movement (rotation). With reactivations, a favorable force system through 20° of molar movement is maintained. Conclusions: Present root-movement appliances require periodic adjustment to achieve optimal tooth movement. Additional studies are needed to design orthodontic appliances for delivering optimal force systems for the entire range of tooth movement.

AB - Introduction: Tooth movement simulation is important for planning the optimal force system and appliance design to correct a specific malocclusion. Experimental verification of a 3-dimensional force system is described for a unique molar root movement strategy that can be adapted to many clinical scenarios. Methods: The force system was measured for molar root movement springs that had adjustable alpha (anterior) and beta (posterior) moments. A 3-dimensional transducer assessed moments and forces in 3 planes during deactivation and simulated molar rotation. Two experimental situations were compared by using 10 springs in each group: spring reactivation was performed to compensate for changes in the force system caused by molar movement, or there was no reactivation. Results: Without reactivation, the force system becomes unfavorable after approximately 5° of molar movement (rotation). With reactivations, a favorable force system through 20° of molar movement is maintained. Conclusions: Present root-movement appliances require periodic adjustment to achieve optimal tooth movement. Additional studies are needed to design orthodontic appliances for delivering optimal force systems for the entire range of tooth movement.

UR - http://www.scopus.com/inward/record.url?scp=59349090785&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=59349090785&partnerID=8YFLogxK

U2 - 10.1016/j.ajodo.2007.02.058

DO - 10.1016/j.ajodo.2007.02.058

M3 - Article

C2 - 19201322

AN - SCOPUS:59349090785

VL - 135

SP - 165

EP - 173

JO - American Journal of Orthodontics and Dentofacial Orthopedics

JF - American Journal of Orthodontics and Dentofacial Orthopedics

SN - 0889-5406

IS - 2

ER -