Results 181 to 190 of about 5,418 (222)
Some of the next articles are maybe not open access.
Maxillary canine retraction, periodontal surgery, and relapse
American Journal of Orthodontics, 1980Extraction spaces closed during the course of orthodontic therapy tend to re-open, whereas orthodontically rotated teeth are prone to relapse. One of the major causes of spaces opening between teeth is the supra-alveolar soft tissues which do not always adapt to the new tooth positions.
A G, McCollum, C B, Preston
openaire +2 more sources
An Evaluation of Different Methods of Canine Retraction
British Journal of Orthodontics, 1977A Variety of different methods (17 in all) of retracting a canine tooth using fixed appliances with edgewise brackets are discussed in detail. The methods have been divided into two groups involving sliding the tooth along the archwire and moving the tooth with the archwire. The advantages and disadvantages of each method have been outlined.
openaire +2 more sources
A novel removable appliance for canine retraction: a case report
Journal of Orthodontics, 2022This case report outlines the use of a modified Leighton’s retractor as a method for canine retraction in a patient with severe hypodontia, a history of aggressive periodontitis with tooth loss and idiopathic root resorption affecting multiple teeth. Treatment involved an upper removable appliance in combination with a lower sectional fixed appliance ...
Kelly Smorthit, Rachel Little
openaire +2 more sources
Numerical simulation of canine retraction by sliding mechanics
American Journal of Orthodontics and Dentofacial Orthopedics, 2005Bone remodeling laws have been used to simulate the movement of a single tooth, but the calculations for simulating the movement of several teeth simultaneously are time-consuming. The purpose of this article is to discuss a method that allows the simulation of more complex tooth movements.A 3-dimensional finite element method was used to simulate the ...
Yukio, Kojima, Hisao, Fukui
openaire +2 more sources
An investigation into the characteristics of the PG canine retraction spring
American Journal of Orthodontics and Dentofacial Orthopedics, 1994The forces and couples produced by a model of the PG maxillary canine retraction spring (Danish loop) when activated have been derived by using the complementary (strain) energy method. The theoretical results of the analysis have been verified by experiments on enlarged planar models in a special jig that, by means of strain gauges, was capable of ...
J D, Eden, N E, Waters
openaire +2 more sources
A clinical study of maxillary canine retraction with a retraction spring and with sliding mechanics
American Journal of Orthodontics and Dentofacial Orthopedics, 1989The efficiency of maxillary canine retraction by means of sliding mechanics along an 0.018-inch labial arch and an AlastiK chain was compared with that using the canine retraction spring designed by Gjessing. The rate of canine retraction and degree of tipping, and rotation of the canines were studied in 21 subjects by one of these two methods on ...
P, Ziegler, B, Ingervall
openaire +2 more sources
Retraction of Canines Using Bonded Tube-brackets
British Journal of Orthodontics, 1983Investigations 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.
openaire +2 more sources
Changes over time in canine retraction: An implant study
American Journal of Orthodontics and Dentofacial Orthopedics, 2009The objective of this study was to analyze rates of canine movement over the first 2 months of continuous retraction, when rate changes are expected.Ten patients with bone markers placed in the maxilla and the mandible had their canines retracted over a 2-month period. Retraction was accomplished with beta-titanium alloy T-loop springs. Standardized 45
Renato Parsekian, Martins +3 more
openaire +2 more sources
Canine retraction: A comparison of two preadjusted bracket systems
American Journal of Orthodontics and Dentofacial Orthopedics, 1996Before the 1970s, Begg and Edgewise appliances were the most commonly used appliances in orthodontics. With the introduction of preadjusted appliances, many have made claims of superiority. These claims are often unsubstantiated, as few, if any, have ever been tested in a controlled, prospective in vivo study.
L P, Lotzof, H A, Fine, G J, Cisneros
openaire +2 more sources
A Finite Element Study of Canine Retraction with a Palatal Spring
British Journal of Orthodontics, 1991The use of a removable appliance to retract a maxillary canine tooth into a first premolar extraction space is one of the most commonly performed orthodontic procedures. However, unwanted movements may occur, including excessive tipping, rotation, and flaring of the tooth.
A N, Wilson +3 more
openaire +2 more sources