Preliminary study of cranio-maxillofacial hard tissue structure feature of young mandibular retrusion orthognathic patients with delaire cephalometric analysis / 华西口腔医学杂志

ABSTRACT

<p><b>OBJECTIVE</b>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.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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.</p><p><b>CONCLUSION</b>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.</p>