Palatal and maxillary Arch width changes in patients with Class II division 1 malocclusion treated with maxillary first premolar extraction

Objective: The aim of this study was to determine palatal and maxillary arch width changes during MBT PEA with maxillary first premolars extraction treatment in patients with Class II division 1 malocclusion. Material and Methods: Dental casts of 24 Class II division 1 patients (8 males and 16 females) were evaluated. The minimum age of the subjects at the beginning of treatment was above 16 years with mean age 02.02± 2.82. All patients were treated with extraction of the maxillary first premolars and MBT PEA. Pre- and post-treatment maxillary and palatal (inter-canine and inter-molar) widths were measured using a digital calliper of 0.01 accuracy. Paired samples t-test was used to evaluate the treatment changes within total sample and within males group and females group. Differences between males and females were tested using independent samples t-test. Results: At the end of treatment, maxillary and palatal inter-canine widths increased significantly (P>0.001).The maxillary inter-molar width increased but the values were statistically insignificant (P<0.05). The palatal inter-molar width increased significantly (P>0.01). No significant differences were observed between males and females. Conclusions: Class II division 1 patients treated with extraction of maxillary first premolars had tendency for an increase in palatal and arch width during treatment except maxillary inter-molar width. It seems that a more thorough assessment and investigation including pretreatment arch shape and factors related to anchorage should be carried out.

Length and depth of the hard palatine and its relationship with facial growth type in adolescents (CBCT Scan Study).

It is generally agreed that growth in palatine results from bone formation at the palatine sutures and lengthening of the alveolar processes, but the extent to which these two sites contribute to the depth and length of the hard palate remains unsolved. Hence, professionals should use quantitative assessments of the hard palate, which allow more accuracy in the diagnosis and assessment of this structure. Aim investigating the relationship between the length and depth of the skeletal hard palatine with facial growth type in adult subjects using CBCT scan.