Comparison of Dental and Alveolar Arch Widths in Class I and Class Ii Division 1 Malocclusion

The objective of this study was to compare transverse dimensions of the dental arches and alveolar arches in the canine, premolar and molar regions of Class I and Class II div 1 malocclusion groups. This cross sectional study was performed at Lahore medical and dental college, from January 2011 to November 2011, using measurements on dental casts of 30 Class I and Class II div 1 adult female subjects. Twelve dental and alveolar arch width measurements were recorded from dental casts using a dial caliper. Descriptive analysis and paired sample ttest were carried out for significance (P < 0.05). Statistically significant differences were found in two of the twelve measurements. Mandibular canine alveolar width & mandibular premolar alveolar width in Class II div1 group were significantly narrower than Class I group. Rest of the variables did not show any significant difference. The results of our study suggest that Mandibular intercanine and interpremolar alveolar width measurements were narrower in Class II subjects and there is a tendency towards lingual cross bites in that malocclusion group. Key Word: Dental arch width, Alveolar arch width, Class I malocclusion, Class II div 1 malocclusion. 1 Assistant Professor, Orthodontic Department Lahore Medical & Dental College, Lahore. 2 Assistant Professor, Orthodontic Department Lahore Medical & Dental College, Lahore. 3 Professor & Head of Orthodontic Department Faryal Dental College, Faizpur Interchange Corresponding Author and Reprint request to: Dr. Junaid Israr SD 39, Street 3, Block 2, Askari III Officers Colony, Bedian Road, Lahore Cantt. Lahore. 54792 Tel No: 0322-4729367 E-mail: [email protected] www.orthozone.pk Mobile: 00962-777515170 Received for Publication: July 8, 2013 Accepted: July 16, 2013 ORIGINAL ARTICLE ORTHODONTICS