
doi: 10.1179/bjo.10.4.187
pmid: 6357274
Investigations using a Force Analyser were carried out to test the characteristics of retractor springs fitted to a removable appliance and designed for insertion into a tube-bracket, bonded to the buccal surface of a canine. The retractors were shown to produce a counter—rotation couple when activated on the typodont. This type of canine retraction was then used clinically, and was found to produce less distal tilting than is noted with the single-point contact of a cantilever spring. Some spontaneous reduction in overjet was found to occur in each case of a small series. Possible mechanisms to account for this effect are discussed.
Cuspid, Orthodontic Appliances, Tooth Movement Techniques, Dental Bonding, Humans, Equipment Design, Stress, Mechanical, Malocclusion, Angle Class II, Malocclusion
Cuspid, Orthodontic Appliances, Tooth Movement Techniques, Dental Bonding, Humans, Equipment Design, Stress, Mechanical, Malocclusion, Angle Class II, Malocclusion
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