Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion

SUMMARY: The aim of this study was to evaluate the hard and soft tissue profile changes following treatment of functional and mild skeletal class III malocclusion in mixed dentition by means of the Frankel functional regulator (FR-3) appliance, and to reveal the mechanism and effectiveness of treatm...

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Autores principales:	Ji,Li-Li, Sun,Dan-Xu, Shi,Ling-Bo, Kyung,Hee-Moon, Bing,Li, Wu,Xiu-Ping
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2020
Materias:	Class III malocclusion Frankel functional regulator III Cephalometric analysis Morphological changes
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022020000401053
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spelling	oai:scielo:S0717-950220200004010532020-09-08Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III MalocclusionJi,Li-LiSun,Dan-XuShi,Ling-BoKyung,Hee-MoonBing,LiWu,Xiu-Ping Class III malocclusion Frankel functional regulator III Cephalometric analysis Morphological changes SUMMARY: The aim of this study was to evaluate the hard and soft tissue profile changes following treatment of functional and mild skeletal class III malocclusion in mixed dentition by means of the Frankel functional regulator (FR-3) appliance, and to reveal the mechanism and effectiveness of treatment with FR-3 appliance. Twenty-six patients (chronological mean age, 8.7±1.4 years; mean treatment duration, 10.3±1.3 months) with functional and mild skeletal class III malocclusion were selected and treated with FR-3 appliances. Lateral cephalogram was taken pre- and post-treatment, and the data was analyzed by paired-samples t test with SPSS22.0 software package. Differences were considered statistically significant at P < 0.05. The results demonstrated that the FR-3 appliance produced a statistically significant decrease in L1-NB, L1-MP, U1-L1 (P<0.01) and an increase greatly in ANB, MP-FH, Y axis, ANSMe, ANS-Me/N-Me and overjet (P<0.01). SNA, SNB were increased significantly (P<0.05). Meanwhile, N’-Sn-Pog’, ULSn-SN, LLSiSN increased, S-N’-Si, LL-EP decreased with significant difference (P<0.01). S-N’-Sn, Cm-Sn-UL, UL-EP, Sn-Mes and Ns-Mes increased with significant difference (P<0.05). Therefore it was concluded that after FR-3 treatment, the position of mandible may rotate clockwise backwards and downwards, with the labioversion of upper incisors and linguoversion of lower incisors. Although point A moved mesially, the length and position of the maxilla did not change significantly. With the protrusion of upper lip and the retrusion of lower lip, the relationship among nose, upper lip, lower lip and chin become harmonious, the profile of soft tissue is more coordinated and attractive.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.38 n.4 20202020-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022020000401053en10.4067/S0717-95022020000401053
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Class III malocclusion Frankel functional regulator III Cephalometric analysis Morphological changes
spellingShingle	Class III malocclusion Frankel functional regulator III Cephalometric analysis Morphological changes Ji,Li-Li Sun,Dan-Xu Shi,Ling-Bo Kyung,Hee-Moon Bing,Li Wu,Xiu-Ping Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion
description	SUMMARY: The aim of this study was to evaluate the hard and soft tissue profile changes following treatment of functional and mild skeletal class III malocclusion in mixed dentition by means of the Frankel functional regulator (FR-3) appliance, and to reveal the mechanism and effectiveness of treatment with FR-3 appliance. Twenty-six patients (chronological mean age, 8.7±1.4 years; mean treatment duration, 10.3±1.3 months) with functional and mild skeletal class III malocclusion were selected and treated with FR-3 appliances. Lateral cephalogram was taken pre- and post-treatment, and the data was analyzed by paired-samples t test with SPSS22.0 software package. Differences were considered statistically significant at P < 0.05. The results demonstrated that the FR-3 appliance produced a statistically significant decrease in L1-NB, L1-MP, U1-L1 (P<0.01) and an increase greatly in ANB, MP-FH, Y axis, ANSMe, ANS-Me/N-Me and overjet (P<0.01). SNA, SNB were increased significantly (P<0.05). Meanwhile, N’-Sn-Pog’, ULSn-SN, LLSiSN increased, S-N’-Si, LL-EP decreased with significant difference (P<0.01). S-N’-Sn, Cm-Sn-UL, UL-EP, Sn-Mes and Ns-Mes increased with significant difference (P<0.05). Therefore it was concluded that after FR-3 treatment, the position of mandible may rotate clockwise backwards and downwards, with the labioversion of upper incisors and linguoversion of lower incisors. Although point A moved mesially, the length and position of the maxilla did not change significantly. With the protrusion of upper lip and the retrusion of lower lip, the relationship among nose, upper lip, lower lip and chin become harmonious, the profile of soft tissue is more coordinated and attractive.
author	Ji,Li-Li Sun,Dan-Xu Shi,Ling-Bo Kyung,Hee-Moon Bing,Li Wu,Xiu-Ping
author_facet	Ji,Li-Li Sun,Dan-Xu Shi,Ling-Bo Kyung,Hee-Moon Bing,Li Wu,Xiu-Ping
author_sort	Ji,Li-Li
title	Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion
title_short	Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion
title_full	Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion
title_fullStr	Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion
title_full_unstemmed	Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion
title_sort	morphological changes of frankel functional regulator iii in mixed dentition with class iii malocclusion
publisher	Sociedad Chilena de Anatomía
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022020000401053
work_keys_str_mv	AT jilili morphologicalchangesoffrankelfunctionalregulatoriiiinmixeddentitionwithclassiiimalocclusion AT sundanxu morphologicalchangesoffrankelfunctionalregulatoriiiinmixeddentitionwithclassiiimalocclusion AT shilingbo morphologicalchangesoffrankelfunctionalregulatoriiiinmixeddentitionwithclassiiimalocclusion AT kyungheemoon morphologicalchangesoffrankelfunctionalregulatoriiiinmixeddentitionwithclassiiimalocclusion AT bingli morphologicalchangesoffrankelfunctionalregulatoriiiinmixeddentitionwithclassiiimalocclusion AT wuxiuping morphologicalchangesoffrankelfunctionalregulatoriiiinmixeddentitionwithclassiiimalocclusion
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Morphological Changes of Frankel Functional Regulator III in Mixed Dentition with Class III Malocclusion

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