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Effects of retraction force and anchorage reinforcement on occlusal force: a model study

Title
Effects of retraction force and anchorage reinforcement on occlusal force: a model study
Authors
Kim, MoonHeeSeol, Kyung-simLee, YoonjungPark, JimanKim, MinjiChun, Youn-Sic
Ewha Authors
전윤식박지만김민지
SCOPUS Author ID
전윤식scopus; 박지만scopus; 김민지scopus
Issue Date
2014
Journal Title
EUROPEAN JOURNAL OF ORTHODONTICS
ISSN
0141-5387JCR Link1460-2210JCR Link
Citation
vol. 36, no. 5, pp. 563 - 568
Publisher
OXFORD UNIV PRESS
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
OBJECTIVES: T he aim of this study was to investigate the effects of retraction force and anchorage reinforcement with orthodontic mini implants on occlusal force. MATERIALS AND METHODS: A strain gauge was attached to the palatal surface of the maxillary right first molar on an en masse retraction model. RESULTS: Occlusal forces were measured from this model, according to different retraction forces that were generated by elastic chain, under varied compressive forces (simulating masticatory forces). This retraction experiment was then performed again, after using anchorage reinforcement with an orthodontic mini implant. Occlusal force decreased as retraction force increased. The decrease showed a significant difference above 150 g of retraction force (P < 0.05) and was more definite under compressive force higher than 150 N (P < 0.001). After anchorage reinforcement with the orthodontic mini implant, however, occlusal force did not significantly decrease with increasing retraction force. Significant differences in occlusal force were noted between the conditions with and without anchorage reinforcement when the applied retraction force was greater than 200 g. CONCLUSION: Occlusal force tends to decrease during retraction, and this decrease can be prevented by anchorage reinforcement with orthodontic mini implants. LIMITATIONS: Further investigation on the actual masticatory process in humans is required for more clear clinical implication.
DOI
10.1093/ejo/cjt085
Appears in Collections:
의학전문대학원 > 의학과 > Journal papers
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