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Three dimensional analysis of tooth movement using different types of maxillary molar distalization appliances

Title
Three dimensional analysis of tooth movement using different types of maxillary molar distalization appliances
Authors
Kim, Su-JinChun, Youn-SicJung, Sang-HyukPark, Sun-Hyung
Ewha Authors
전윤식정상혁박선형
SCOPUS Author ID
전윤식scopus; 정상혁scopus
Issue Date
2008
Journal Title
KOREAN JOURNAL OF ORTHODONTICS
ISSN
1225-5610JCR Link
Citation
vol. 38, no. 6, pp. 376 - 387
Keywords
Molar distalizationMini-implantIndirect anchorageCalorific machine
Publisher
KOREAN ASSOC ORTHODONTISTS
Indexed
SCOPUS; KCI WOS
Abstract
Objective: The purpose of this study was to compare the three dimensional changes of tooth movement using four different types of maxillary molar distalization appliances; pendulum appliance (PD), mini-implant supported pendulum appliance (MPD), stainless steel open coil spring (SP) and mini-implant supported stainless steel open coil spring (MSP). Methods: These experiments were performed using the Calorific machine? which can simulate dynamic tooth movement. Computed tomography (CT) images of the experimental model were taken before and after tooth movement in 1 mm thicknesses and reconstructed into a three dimensional model using V-works 4.0 (TM). These reconstructed images were superimposed using Rapidform 2004 (TM) and the direction and amount of tooth movement were measured. Results: The mean reciprocal anchor loss ratio at the first premolar was 17 - 19% for the PD and SP groups. The appliances using mini-implants (MPD or MSP) resulted in less anchorage loss (7 - 8%). On application of a pendulum appliance or MPD, distalization was obtained by tipping rather than by bodily movement. Furthermore, the maxillary second molar tipped distally and bucally. But on application of MSP, distalization was achieved almost by bodily movement. Conclusions: Regarding tooth movement patterns during molar distalization, stainless steel open coil spring with indirect skeletal anchorage was relatively superior to other methods. (Korean J Orthod 2008;38(6):376-387)
DOI
10.4041/kjod.2008.38.6.376
Appears in Collections:
의과대학 > 의학과 > Journal papers
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