Three-dimensional orthodontic force measurements.

Full Abstract

INTRODUCTION: Until recently, much of the orthodontic biomechanics literature was restricted to 2-dimensional experimental studies and, more recently, to assumption-based 3-dimensional computer modeling. There is little evidence in the literature regarding 3-dimensional experimental measurements and analysis of orthodontic force systems. METHODS: The purpose of this study was the design, construction, and validation of a laboratory-based human mouth model capable of accurately measuring forces and moments applied by orthodontic fixed appliances on all teeth in 1 arch. A high canine malocclusion was simulated, and forces and moments acting on the canine, lateral incisor, and premolar were measured with passive and conventional ligation. RESULTS: We were successful in building this human mouth model. The error in force measurements of the 14 transducers was 1.54%. The force system resulting from passive ligation brackets was considerably different from that of conventional ligation. CONCLUSIONS: This method will allow us, for the first time in the history of our specialty, to determine with great accuracy the forces acting on orthodontically treated teeth. Future research will focus on simulating many types of orthodontic clinical applications of full-fixed or partial-fixed appliances.

Author information

Author/s: Badawi, Hisham M (HM); Toogood, Roger W (RW); Carey, Jason P R (JP); Heo, Giseon (G); Major, Paul W (PW);

Affiliation: Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada. hbadawi(-atsign-)ualberta.ca

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies

Journal: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics (Am J Orthod Dentofacial Orthop), published in United States. (Language: eng)

Reference: 2009-Oct; vol 136 (issue 4) : pp 518-28

Dates: Created 2009/10/09; Completed 2009/10/29;

PMID: 19815153, status: MEDLINE (last retrieval date: 10/29/2009, IMS Date: )

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