|
KMID : 0361920110410020127
|
|
Korean Journal of Orthodontics
2011 Volume.41 No. 2 p.127 ~ p.137
|
|
|
Differences in opening and protrusive mandibular movements between Class I and II malocclusions in healthy adolescents
|
|
Burcu Balos Tuncer
Berk Ozo?ul
Sevil Akkaya
|
|
|
Abstract
|
|
|
Objective : The aim of the study was to compare the opening and protrusive mandibular movements between Class I and Class II malocclusions in healthy adolescents by clinical and axiographic evaluations.
Methods: Mechanical axiography was performed on non-orthodontically treated, temporomandibular disorder (TMD)-free adolescents (12 - 16 years) with Class I (n = 38, 16 boys, 22 girls) or Class II (n = 40, 19 boys, 21 girls) malocclusion. Opening and protrusive movements were measured clinically and axiographically. Intergroup comparisons were evaluated by t-tests.
Results: In opening movement, the maximum clinical opening capacity was significantly different (p ≤ 0.05) between the groups. In protrusive movement, the Class II group had significantly greater maximum clinical protrusion (p ＜ 0.001) and maximum axiographic protrusive length (p ＜ 0.01) than the Class I group. No significant difference in the other opening and protrusive axiographic measurements was observed.
Conclusions : TMD-free adolescents with Class II malocclusion have increased protrusive capacity compared with TMD-free adolescents with Class I malocclusion; however, the detected differences could be normal variations during adolescence.
|
|
|
KEYWORD
|
|
|
Condylar path, TMJ, Mandibular movements, Class II adolescents
|
|
|
FullTexts / Linksout information
|
|
  
|
|
|
Listed journal information
|
|
  
|