[Preliminary study of cranio-maxillofacial hard tissue structure feature of young mandibular retrusion orthognathic patients with delaire cephalometric analysis].
OBJECTIVE
To guide the orthodontic diagnosis, treatment planning and prognosis by analyzing the craniofacial morphology and reimbursement mechanism of young patients with mandibular retrusion in Chongqing territory by Delaire cephalometric analysis.


METHODS
Both conventional cephalometric analysis and Delaire cephalometric analysis were conducted on the basis of the lateral cephalograms from 56 young mandibular retrusion patients and 40 teenagers with normal occlusion.


RESULTS
Decreases in angle SNB, Co-Go, Co-Pog, U1-L1 and increases in angle ANB, angle SN-MP, L1-MP were seen in mandibular retrusion group by conventional cephalometric analysis. Decreases in angle 1, angle 5, (Cp-Oi)/C2 and increases in angle 2, (M-Cp)/C2, angle 3, angle 4 were seen in mandibular retrusion group by Delaire cephalometric analysis. Me-F1 and Me-Met were -8.70 mm +/- 2.48 mm and 5.74 mm +/- 2.58 mm respectively.


CONCLUSIONS
Delaire cephalometric analysis could evaluate cranio-maxillofacial architectural features of mandibular retrusion patients more visually and quantitatively, which suggests that mandibular retrusion is usually caused by the retrusion of mandibular position and the hypodevelopment of mandibule.
Zhou
Jie
J
Dept. of Orthodontics, College of Stomatology, Chongqing Medical University, Chongqing 400015, China.
Song
Jin-Lin
JL
Chen
Meng-Wei
MW
Wang
Tao
T
Deng
Feng
F
D000293:Adolescent; D002508:Cephalometry; D003766:Dental Occlusion; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D063173:Retrognathia