PMID- 18929270
OWN - NLM
STAT- MEDLINE
DCOM- 20081105
LR  - 20220318
IS  - 1097-6752 (Electronic)
IS  - 0889-5406 (Linking)
VI  - 134
IP  - 4
DP  - 2008 Oct
TI  - Condylar growth and mandibular positioning with stepwise vs maximum advancement.
PG  - 525-36
LID - 10.1016/j.ajodo.2006.09.064 [doi]
AB  - INTRODUCTION: The aim of this study was to compare the effects of several Class 
      II malocclusion treatments on condylar growth and positioning of the mandible. 
      METHODS: The material comprised series of lateral cephalograms obtained at the 
      start, after about 6 months, and after about 12 months of treatment from 3 groups 
      of consecutively treated patients who used a headgear-activator with stepwise 
      mandibular advancement (HGA-S), a headgear-activator with maximum jumping of the 
      mandible (HGA-M), and a headgear-Herbst appliance with stepwise advancement 
      (HGH-S), respectively. Six-month growth data from matched controls were used to 
      calculate the net treatment effects. RESULTS: Mandibular prognathism was enhanced 
      after stepwise advancement but not after maximum jumping, and only during the 
      initial phase of therapy; the effect was significantly greater for the fixed 
      functional appliance than for the removable functional appliance. Lower-facial 
      height was increased by the HGA-S, unchanged by the HGA-M, and restrained by the 
      HGH-S. The low construction bite of the HGH-S meant that the extent of bone 
      apposition on the posterior and superior parts of the condyle was similar, 
      whereas the high construction bite of the HGA-S and the HGA-M meant that the 
      effect on the superior part was greater, but only significantly so after stepwise 
      advancement. CONCLUSIONS: The mode of jumping, the vertical opening, and whether 
      the functional appliance is fixed or removable affect the amount and pattern of 
      condylar growth, and the position of the mandible.
FAU - Hagg, Urban
AU  - Hagg U
AD  - Department of Orthodontics, University of Hong Kong, Hong Kong. 
      euohagg@hkusua.hku.hk
FAU - Rabie, A Bakr M
AU  - Rabie AB
FAU - Bendeus, Margareta
AU  - Bendeus M
FAU - Wong, Ricky W K
AU  - Wong RW
FAU - Wey, Mang Chek
AU  - Wey MC
FAU - Du, Xi
AU  - Du X
FAU - Peng, Jasmine
AU  - Peng J
LA  - eng
PT  - Controlled Clinical Trial
PT  - Journal Article
PL  - United States
TA  - Am J Orthod Dentofacial Orthop
JT  - American journal of orthodontics and dentofacial orthopedics : official 
      publication of the American Association of Orthodontists, its constituent 
      societies, and the American Board of Orthodontics
JID - 8610224
SB  - IM
MH  - Adolescent
MH  - Cephalometry/statistics & numerical data
MH  - Child
MH  - *Extraoral Traction Appliances
MH  - Female
MH  - Humans
MH  - Male
MH  - Malocclusion, Angle Class II/*therapy
MH  - Mandible/physiology
MH  - Mandibular Advancement/*instrumentation/*methods
MH  - Mandibular Condyle/*growth & development
MH  - *Orthodontic Appliances, Functional
MH  - Prospective Studies
MH  - Treatment Outcome
EDAT- 2008/10/22 09:00
MHDA- 2008/11/06 09:00
CRDT- 2008/10/22 09:00
PHST- 2006/07/01 00:00 [received]
PHST- 2006/09/01 00:00 [revised]
PHST- 2006/09/01 00:00 [accepted]
PHST- 2008/10/22 09:00 [pubmed]
PHST- 2008/11/06 09:00 [medline]
PHST- 2008/10/22 09:00 [entrez]
AID - S0889-5406(08)00428-9 [pii]
AID - 10.1016/j.ajodo.2006.09.064 [doi]
PST - ppublish
SO  - Am J Orthod Dentofacial Orthop. 2008 Oct;134(4):525-36. doi: 
      10.1016/j.ajodo.2006.09.064.