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Physics and clinical orthodontics: 100 years ago and today.
Am J Orthod Dentofacial Orthop
March 2015
Farmington, Conn.
Axes of resistance for tooth movement: does the center of resistance exist in 3-dimensional space?
Am J Orthod Dentofacial Orthop
February 2013
Biomechanics and μCT Laboratories, Department of Orthodontics, College of Dentistry, New York University, New York, NY 10010, USA.
Introduction: The center of resistance is considered the most important reference point for tooth movement. It is often stated that forces through this point will result in tooth translation. The purpose of this article is to report the results of numeric experiments testing the hypothesis that centers of resistance do not exist in space as 3-dimensional points, primarily because of the geometric asymmetry of the periodontal ligament.
View Article and Find Full Text PDFPolyphenylene polymers as esthetic orthodontic archwires.
Am J Orthod Dentofacial Orthop
April 2011
Division of Orthodontics, School of Dental Medicine, University of Connecticut Health Center, Farmington, CT06030, USA.
Introduction: There is continuing interest in an esthetic, effective labial archwire. In this study, we evaluated the potential of new, high-strength polyphenylene polymers to fill this need.
Methods: Polyphenylene (Primospire, Solvay Advanced Polymers, Alpharetta, Ga) polymer was extruded into wires with clinically relevant round and rectangular cross sections.
Viscoelastic properties of an aesthetic translucent orthodontic wire.
Eur J Orthod
December 2011
Center for Biomaterials, School of Dental Medicine, University of Connecticut Health Center, Farmington, CT, USA.
The objective of this study was to evaluate the time-dependent viscoelastic properties of an aesthetic orthodontic archwire. The wire is based on a recently developed translucent polyphenylene thermoplastic, whose rigid molecular structure provides high strength. While the wire has good instantaneous mechanical properties, over time all polymers may relax so it is important to understand the potential impact of the relaxation on orthodontic force systems.
View Article and Find Full Text PDFMiniscrews in orthodontic treatment: review and analysis of published clinical trials.
Am J Orthod Dentofacial Orthop
January 2010
Department of Orthodontics, School of Dentistry, Medical University of Vienna, Vienna, Austria.
Introduction: A systematic review of effects related to patient, screw, surgery, and loading on the stability of miniscrews was conducted.
Methods: Reports of clinical trials published before September 2007 with at least 30 miniscrews were reviewed. Parameters examined were patient sex and age, location and method of screw placement, screw length and diameter, time, and amount of loading.
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