Intercanine and intermolar widths in angle class I, II and III malocclusions

Malrelation along the transverse plane is one of the most common causes of malocclusion and can be assessed by considering the intercanine and intermolar widths. An endeavour was undertaken to find the intercanine and intermolar widths on 76 dental casts of the individuals having Class I, Class II division 1, Class II division 2, Class III and Class II subdivision malocclusions, visiting orthodontic department of Sardar Begum dental college and hospital, Peshawar. Results were obtained using SPSS version 20 which showed the mean maxillary intermolar widths of 34.6mm*, 34.5mm, 30.9mm, 34.7 mm and 34.18mm for Class I, Class II division 1,Class II division 2,Class III and Class II subdi-vision groups respectively. Mean maxillary intercanine widths were found to be 24.16mm, 24.5mm, 24.6mm, 23.9mm and 23.05mm for Class I, Class II division 1,Class II division 2,Class III and Class II subdivision groups respectively. Similarly mean mandibular intermolar widths were 32.8mm, 33.02mm, 30.3mm, 33.1mm and 32.8mm for Class I, Class II division 1, Class II division 2, Class III and Class II subdivision groups respectively. While mean mandibular intercanine widths were found to be 19.2mm,19.06mm,20.34mm,19.54mm and 18.75mm for the Class I, Class II division 1,Class II division 2,Class III and Class II subdivision groups respectively. ANOVA analysis showed no sta-tistical significant differences in the intermolar and intercanine widths among the five malocclusion groups

Validity of little's irregularity index on photocopied images of dental casts

Crowding whether primary or secondary is one of the main reasons for seeking orthodontic treatment. Incisor irregularity is an easy and excellent indicator of the severity of crowding. Assessment of incisor irregularity on photocopied images can prove to be a good mean as an alternate to the conventional method of assessment on dental casts. In this study a sample of 58 dental casts were selected using non probability purposive sampling technique. The accuracy of assessment of incisor irregularity on photocopied images is judged by finding its comparison with direct method of assessment on dental casts which showed a good agreement when assessed using paired sample t test [p- value- 0.201] and the correlation was 0.775. An advantage of assessment of incisor irregularity on photocopied images is that the vertical errors that can occur in conventional method are precluded. Thus this study concludes that an alternate way of assessment of incisor irregularity on photocopied images is a reliable diagnostic tool which can be considered in our routine diagnostic procedures