[Clinical effect of modified forsus appliance to children with mandibular retrusion].
OBJECTIVE
To evaluate the effects of modified Forsus appliance in the treatment of Class II mandibular retrusion.


METHODS
18 children with mandibular retrusion were selected and treated with modified Forsus appliance. Cephalometric radiographs were taken and analyzed at pre-treatment and post-treatment. Students' t-test was used to determine if there were significant differences between pre-treatment and post-treatment.


RESULTS
After 6-8 months of therapy, profiles were obviously improved. B moved forward (2.9+/-3.1) mm. ANB decreased (2.5+/-1.2) degrees. The overjet decreased (5.0+2.8) mm. The molar relationship was corrected to Class I from Class II. SN-OL increased (4.3+2.2) degrees. There was significant difference between pre-treatment and post-treatment.


CONCLUSIONS
Combined with straight wire appliance, modified Forsus appliance can effectively stimulate the mandibular growth, balance the jaw relationship, and correct mandibular retrusion.
Ye
Jing
J
Dept. of Orthodontics, College of Stomatology, Shandong Universi- ty, Jinan 250012, China.
Wang
Chan-ling
CL
Liu
Dong-Xu
DX
Guo
Jie
J
Zhang
Fan
F
D002508:Cephalometry; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II; D008334:Mandible; D017289:Orthodontic Appliances, Functional; D063173:Retrognathia