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A new perspective for optimization of treatment efficiency based on
biomechanical principles
Abstract
There are a variety of questions raised in various clinical situations. In
sliding mechanics, power arms are often attached onto an archwire in order
to apply torque to the anterior teeth, and consequently to prevent the bowing
effect during space closure. However, is it true that the combined use of
power arm allows effective torque control of anterior teeth ? In loop
mechanics, gable bends are incorporated into loops to produce anti-tipping
moment in addition to retraction force. Then another question is raised. Can
loop with gable bends generate sufficient amount of moment-to-force ratio for
achieving bodily movement or root movement ?
In order to obtain an ideally planned treatment goal and to improve
therapeutic efficiency, basic principles of biomechanics should be applied to
daily orthodontic practice. Advantages and disadvantages of sliding
mechanics and loop mechanics and their optimal utilization will be discussed
based on biomechanical considerations. Lastly, new mechanics for space
closure will be introduced.
Noriaki Yoshida, DDS, PhD
Professor and Chair, Department of Orthodontics and Dentofacial Orthopedics,
Nagasaki University Graduate School of Biomedical Sciences
1980-1986
DDS from Nagasaki University School of Dentistry, Japan
1990-2000
Instructor, Department of Orthodontics, Nagasaki University School of
Dentistry
1992-1994 Research fellow, Department of Orthodontics and Dentofacial Orthopedics,
Free University Berlin, Germany
1994
Research fellow, Humboldt University, Germany
2000-2001
Assistant Professor, Department of Orthodontics, Nagasaki University
School of Dentistry
2001-present Professor and Chair, Department of Orthodontics, Nagasaki University
School of Dentistry
2005
Visiting Professor, Orthodontics, Division of Craniofacial Sciences and
Therapeutics, University of Southern California, USA
2009-2013 Vice Dean, Nagasaki University School of Dentistry