AIM: To investigate the effects of the standard Class II Balters Bionator on the treatment of mandibular Class II cases (Bionator group) compared with an equivalent untreated sample (control group) using two different methods: conventional cephalometric analysis (CCA) and geometric morphometrics (GM; thin-plate spline analysis). MATERIALS AND METHOD: Sixty-two lateral cephalometric radiographs were evaluated in the Bionator group (34 males, 28 females). Their ages ranged from 10 years to 13 years 8 months during treatment (mean treatment time: 2 years 2 months). In the control group, 44 radiographs were used (16 females, 28 males) between the beginning and end of observation. Their ages ranged from 7 years 3 months to 14 years 2 months. The observation period lasted 2 years on average, ranging from 1 year 3 months to 4 years 5 months. Method error evaluation was calculated using Dahlberg’s formula and showed no statistical error between the first and second readings. For statistical analysis of CCA, the Mann- Whitney non-parametric test was employed and for GM, Procrustes analysis was performed and ANOVA applied. RESULTS: The control group showed no statistically significant differences in the correction of a mandibular Class II in both CCA and GM. CCA of the Bionator group revealed that increases in the mandibular body and ramus, in the effective length of the mandible and in anterior face length were statistically significant measurements. Through GM analysis (deformation grids) a distortion on the horizontal axis of the grid revealed a significant change in the mandible in the anterior direction, conducive to correction of the malocclusion. CONCLUSION: There was a significant difference between the start of treatment and completion in the Bionator group but not in the corresponding control group ages. This finding demonstrates that treatment caused individuals to change, confirming the effectiveness of facial orthopaedics in mandibular Class II malocclusion cases.
|Titolo:||Anteroposterior changes in mandibular Class II patients treated with the Balters' Bionator|
|Anno di registrazione:||2012|
|Autori di Ateneo:|
|Autori:||K. Faltin; C. Ferlin Antunes; R. Bigliazzi; C.L. Feijó Ortolani; L. Franchi|
|Appare nelle tipologie:||1c - Abstract su rivista|