[Comparison between J-hook and micro-implant anchorage in the treatment of patients with bimaxillary protrusion].
OBJECTIVE
To compare the difference between J-hook and micro-implant anchorage in the treatment of patient with bimaxillary protrusion.


METHODS
Thirty patients with bimaxillary protrusion were divided into two groups (J-hook and micro-implant groups) and treated with MBT appliance. Four first premolars were extracted in all patients. Cephalometric analyses were carried out before and after treatment.


RESULTS
In J-hook group and micro-implant group,computerized cephalometric analysis revealed that before treatment U6C-PP was (12.4 +/- 0.2) mm and (12.5 +/- 0.1) mm, respectively,and after treatment U6C-PP was (12.6 +/- 0.1) mm and (12.8 +/- 0.1) mm,respectively. The difference between J-hook group and microimplant group was significant (P < 0.01). The other differences of cephalometric analyses between J-hook group and micro-implant group was not significant.


CONCLUSIONS
Both J-hook and micro-implant could provide adequate anchorage in the treatment of patients with bimaxillary protrusion.
Chen
Wen-Jing
WJ
Department of Orthodontics, Stomatological College of Nanjing Medical University, Nanjing 210029, China.
Li
Qing-Yi
QY
Gong
Ai-Xiu
AX
Hu
Fang
F
Gu
Yong-Jia
YJ
D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008311:Malocclusion, Angle Class I / Q000628:therapy*; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D009967:Orthodontic Appliances; D009971:Orthodontics, Corrective / Q000295:instrumentation / Q000379:methods*; D055815:Young Adult