[Mini-plate implant anchorage for maxillary protraction in Class III malocclusion].
OBJECTIVE
To investigate the effects using mini-plate implant as anchorage for maxillary protraction in skeletal Class III malocclusion with retruded maxilla.


METHODS
Totally 8 skeletal Class III patients aged 11 - 14 years were included in this study. There were 4 males and 4 females. The mini-plate implants were placed between the upper lateral incisors and canines on both sides in each patient. The mask was used after 1 month healing following mini-plate implant surgery. Cephalography and panoramic radiographs were taken for each patient before and after protraction. Twenty-one cephalometric measurements were used for assessment. Statistically, paired t-test was used.


RESULTS
After protraction, SNA, ANB, Wits, NA-PA, Max-Lth, A-NP distances increased and the significant difference was founded (P < 0.01). ANS-Me, Is-FHp, Ms-FHp, A-FHp distances increased significantly, too (P < 0.05). L1-AP, OJ, AB-NP decreased and the significant difference was detected (P < 0.05). The changes of SNB, MP-SN, PP-SN, U1-PP, U1-SN, U1-AP, L1-MP and ANS-Me/N-Me ratio were not significant (P > 0.05).


CONCLUSIONS
Mini-plate implant was an effective and stable anchorage for promoting forward growth of maxilla following maxillary protraction.
Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China. yanhengzhou@sohu.com
Peng
P
Ding
Yan-Heng
YH
Zhou
Ye
Y
Lin
Li-Xin
LX
Qiu
D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008313:Malocclusion, Angle Class III / Q000601:surgery*; D008437:Maxilla / Q000601:surgery; D009971:Orthodontics, Corrective; D019857:Osteogenesis, Distraction; D019736:Prostheses and Implants; D014025:Titanium
D014025:Titanium