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Comparison of Activator-Headgear and Twin Block Treatment Approaches in Class II Division 1 Malocclusion.

Abstract The purpose was to compare the treatment effects of functional appliances activator-headgear (AH) and Twin Block (TB) on skeletal, dental, and soft-tissue structures in class II division 1 malocclusion with normal growth changes in untreated subjects. The sample included 50 subjects (56% females) aged 8-13 years with class II division 1 malocclusion treated with either AH (n = 25) or TB (n = 25) appliances. Pre- and posttreatment lateral cephalograms were evaluated and compared to 50 untreated class II division 1 cases matched by age, gender, ANB angle, and skeletal maturity. A paired sample, independent samples tests and discriminant analysis were performed for intra- and intergroup analysis. Treatment with both appliances resulted in significant reduction of skeletal and soft-tissue facial convexity, the overjet, and the prominence of the upper lip in comparison to untreated individuals (p < 0.001). Retroclination of maxillary incisors and proclination of mandibular incisors were seen, the latter being significantly more evident in the TB group (p < 0.05). Increase of effective mandibular length was more pronounced in the TB group. In conclusion, both AH and TB appliances contributed successfully to the correction of class II division 1 malocclusion when compared to the untreated subjects with predominantly dentoalveolar changes.
PMID
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Authors

Mayor MeshTerms

Extraoral Traction Appliances

Keywords
Journal Title biomed research international
Publication Year Start




PMID- 28203569
OWN - NLM
STAT- MEDLINE
DA  - 20170216
DCOM- 20170221
LR  - 20170221
IS  - 2314-6141 (Electronic)
VI  - 2017
DP  - 2017
TI  - Comparison of Activator-Headgear and Twin Block Treatment Approaches in Class II 
      Division 1 Malocclusion.
PG  - 4861924
LID - 10.1155/2017/4861924 [doi]
AB  - The purpose was to compare the treatment effects of functional appliances
      activator-headgear (AH) and Twin Block (TB) on skeletal, dental, and soft-tissue 
      structures in class II division 1 malocclusion with normal growth changes in
      untreated subjects. The sample included 50 subjects (56% females) aged 8-13 years
      with class II division 1 malocclusion treated with either AH (n = 25) or TB (n = 
      25) appliances. Pre- and posttreatment lateral cephalograms were evaluated and
      compared to 50 untreated class II division 1 cases matched by age, gender, ANB
      angle, and skeletal maturity. A paired sample, independent samples tests and
      discriminant analysis were performed for intra- and intergroup analysis.
      Treatment with both appliances resulted in significant reduction of skeletal and 
      soft-tissue facial convexity, the overjet, and the prominence of the upper lip in
      comparison to untreated individuals (p &lt; 0.001). Retroclination of maxillary
      incisors and proclination of mandibular incisors were seen, the latter being
      significantly more evident in the TB group (p &lt; 0.05). Increase of effective
      mandibular length was more pronounced in the TB group. In conclusion, both AH and
      TB appliances contributed successfully to the correction of class II division 1
      malocclusion when compared to the untreated subjects with predominantly
      dentoalveolar changes.
FAU - Spalj, Stjepan
AU  - Spalj S
AUID- ORCID: 0000-0003-4836-3903
AD  - Department of Orthodontics, School of Medicine, University of Rijeka, Rijeka,
      Croatia.
FAU - Mroz Tranesen, Kate
AU  - Mroz Tranesen K
AD  - Private Practice, Tannregulering Kristiansand, Kristiansand, Norway.
FAU - Birkeland, Kari
AU  - Birkeland K
AD  - Department of Orthodontics, Institute of Clinical Dentistry, University of Oslo, 
      Oslo, Norway.
FAU - Katic, Visnja
AU  - Katic V
AD  - Department of Orthodontics, School of Medicine, University of Rijeka, Rijeka,
      Croatia.
FAU - Pavlic, Andrej
AU  - Pavlic A
AD  - Department of Orthodontics, School of Medicine, University of Rijeka, Rijeka,
      Croatia.
FAU - Vandevska-Radunovic, Vaska
AU  - Vandevska-Radunovic V
AD  - Department of Orthodontics, Institute of Clinical Dentistry, University of Oslo, 
      Oslo, Norway.
LA  - eng
PT  - Journal Article
DEP - 20170122
PL  - United States
TA  - Biomed Res Int
JT  - BioMed research international
JID - 101600173
SB  - IM
MH  - Adolescent
MH  - Cephalometry
MH  - Child
MH  - *Extraoral Traction Appliances
MH  - Face/pathology
MH  - Female
MH  - Humans
MH  - Incisor/*growth &amp; development/pathology
MH  - Male
MH  - Malocclusion, Angle Class II/pathology/*therapy
MH  - Mandible/*growth &amp; development/pathology
MH  - Maxilla/growth &amp; development/pathology
MH  - Treatment Outcome
PMC - PMC5292161
COI - The authors declare that there is no conflict of interests regarding the
      publication of this paper.
EDAT- 2017/02/17 06:00
MHDA- 2017/02/22 06:00
CRDT- 2017/02/17 06:00
PHST- 2016/11/01 [received]
PHST- 2017/01/04 [accepted]
AID - 10.1155/2017/4861924 [doi]
PST - ppublish
SO  - Biomed Res Int. 2017;2017:4861924. doi: 10.1155/2017/4861924. Epub 2017 Jan 22.

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