The Study Of Condylar And Maxillofacial Symmetry Of Patients With Unilateral Posterior Crossbite With Cbct

ObjectiveThis study was to use CBCT measurement and Mimics10.0ofsoftware measurement to explore bilateral condylar volume and surfacearea differences of patients with unilateral posterior crossbite, to explore thestructural symmetry of the condyle; use the CBCT means and Invivo5software measure the maxillofacial parameter line,to explore maxillofacialstructure symmetry of patients with unilateral posterior crossbite.MethodsTeeth selected in the Chongqing Medical University Dental Hospitalfor treatment in patients with untreated adolescent unilateral crossbitepatients25cases (13males,12females), aged11-16years (mean13.8years); adult patients with unilateral posterior crossbite occlusion withoutorthodontic treatment25patients (10male and15female), age21-30years(mean23.8years). Inclusion criteria were: ANB angle of Wits evaluation,the molar occlusal relationship between bone and tooth type Ⅰ; permanentdentition, in addition to the third molar dentition defect; unilateral posterior crossbite, no anterior crossbite teeth, crossbite involving molars and(or)premolars; no Unilateral chewing habits;no joint disorder symptoms; nodevelopmental or neuromuscular defects; no caries, no restorations, nopathological periodontal disease; no history of orthodontic treatment; nojoint pain, joint disorders and other symptoms. Select the adolescent years,individual normal occlusion in35cases (16male and19females), aged11-16years (mean14.2years); selected adult individual normal occlusionand35cases (16male and19females), age21-30years (mean25.6years).Inclusion criteria were: complete dentition, in addition to the third molar,and the remaining teeth are present; no deformity teeth, teeth withoutdefects; molars, canines as a neutral relationship; neat upper and lowerocclusal dentition, without reversing the tooth no significant crowding orgap (within the dental arch crowding or the gap is less than2mm);orthodontic and maxillofacial trauma surgery; overbite, covering normal,flat Spee’s curve; face the basic coordination, no obvious prognathism,partial jaw and II, Class III deformity, lip function. All unified object ofstudy in Chongqing Medical University Dental Hospital radiology shootingthe CBCT piece. All CBCT piece by the author apply Mimics10.0andInvivo5condylar reconstruction and maxillofacial described pointmeasurement, and statistical comparative analysis of measurement resultsSPSS16.0statistical software. Result1No difference exist at adolescent patients with unilateral posteriorcrossbite group condyle symmetry; adult patients with unilateral posteriorcrossbite group condyle structural asymmetries were exist.2Effective mandibular length asymmetry exist at adolescent patientswith unilateral posterior crossbite group; adults with unilateral posteriorcrossbite, maxillofacial the upper jaw and mandibular asymmetry wereexist.ConclusionAdolescent patients with unilateral posterior crossbite mandibularasymmetry exist, with the growth and development and remodeling inuntreated adults with unilateral crossbite, the structure of the condyle andmaxillofacial region had significant asymmetry, suggesting that right ofearly treatment of unilateral posterior crossbite patients.