Comparison of dental arch widths in class II division I and class II division 2 malocclusion

The dental arch width is of significant interest to orthodontists. The literature confirms a significant difference among the arch width dimensions among the established type of class II malocclusions. The purpose of this study was thus to compare dental arch widths in Class II/1 with Class II/2 malocclusion subjects. The Intercanine, Interpremolar and Intermolar widths were measured on 100 dental casts [50 class II/1 and 50 class II/2 malocclusion subjects]. The data was developed on SPSS 16 for windows. Independent-samples t-test was applied for comparison of the groups. The mandibular Interpremolar width was found out to be significantly narrower whereas Intermolar width was larger in class II/2 sample. No significant differences were documented for maxillary Intercanine and Interpremolar widths, whereas the Intermolar arch width was significantly lager in class II/2 subjects. Lower Interpremolar width was significantly narrow in class II/2 malocclusion and the maxillary and mandibular Intermolar arch width was significantly larger in class II/2 malocclusion

Mesiodens - etiology, prevalence, diagnosis and management

Mesiodens is a supernumerary tooth located in the premaxilla between the two central incisors that causes a variety of dental problems such as impaired dentofacial aesthetics, malocclusion, and sometimes may lead to cyst formation. The prevalence of mesiodens ranges from 0.15% to 1.9%. The current literature review focuses on the etiology, prevalence, diagnosis and management of this problem. Several electronic data bases were selected. Hand searching was done to short list relevant articles. A total of 65 studies were initially retrieved out of which 53 relevant studies were selected for the review. Mesiodens is the most common type of supernumerary tooth that may cause impaired dentofacial esthetics and malocclusion. Males are more prone to be affected than the females. Mesiodens is the most common reported type of supernumerary tooth occurring in permanent dentition. An in-depth evaluation of mesiodens would be helpful to develop significant clinical management of the affected patients

Arch widths in adults with class I normal occlusion and class III malocclusion

The purpose of this study was to compare dental arch widths in Class III malocclusion with Class I normal occlusion subjects. Methodology: The Intercanine, Interpremolar and Intermolar widths were measured on 70 dental casts [35 class I and 35 class III malocclusion subjects]. The data was developed on SPSS 16 for windows. Independent-samples t-test was applied for comparing the two groups. Upper interpremolar and intermolar widths were narrower and lower Intercanine and Intermolar width was larger in class III malocclusion group. Upper intercanine and lower Interpremolar width between the two groups did not reveal any significant difference. In class III malocclusion, almost all the dental arch width measurements in maxilla were smaller and mandibular dental arch width measurements were lager as compared to normal class I normal occlusion

Transmigration of mandibular canines: a review of literature

Transmigration of mandibular canine is a rare entity and is defined as the phenomenon of an unerupted tooth crossing the midline. The exact cause is unknown and the transmigrated tooth usually is asymptomatic. However transmigration might compromise esthetics and occlusion. The current literature review is presented to draw attention towards prominent aspects of this anomaly in developing an understanding for managing such patients. Several electronic databases were searched. Hand searching was done to short list relevant articles. A total of 47 studies were initially retrieved out of which 35 relevant studies were selected for the review. Transmigration is a rare developmental anomaly and has been reported to affect the mandibular canines exclusively. Left side of the arch is reported to be more affected than the right and females show a greater prevalence. Transmigration of mandibular canine is an uncommon phenomenon of unknown etiology that is usually symptom less. An in-depth evaluation of transmigration would be helpful to develop significant clinical management of the affected patients

Dental arch widths in class I normal occlusion and class II division 1 malocclusion

The purpose of this study was to compare dental arch widths Class II division 1 malocclusion with normal Class I occlusion subjects. The Intercanine, Interpremolar and intermolar widths were measured on 100 dental casts [50 class I and 50 class II/1 malocclusion subjects]. The data was developed on SPSS 16 for windows. Independent-samples t-test was applied for comparison of the groups. Lower Intercanine width was larger in class II/1 malocclusion and Intermolar width was significantly increased in call I normal occlusion group. Interpremolar width between the two groups did not reveal any significant difference. Lower intercanine width was significantly larger in class II/1 and Maxillary intermolar width was significantly narrower in class II/1 malocclusion subjects

Class II division 2 malocclusion; cephalometric skeletal evaluation

The purpose of this study was to evaluate the cephalometric skeletal, dental and soft tissue characteristics in class II division 2 malocclusion in the sagittal and vertical dimensions. Lateral cephlaograms of 60 patients for both genders [30 class I and 30 class II/2] were used to determine the characteristics of class II div 2 malocclusion and were compared with control group class I patients. The data base was developed in SPSS 16 for windows. In sagittal plane, mandible was retrognathic in class II/2 malocclusion and demonstrated significantly reduced measurements in vertical plane, indicative of a skeletal deep bite. Upper incisors were significantly retroclined while lower incisors were normally inclined. Both upper and lower lips were protrusive

Cephalometric characteristics of class II division 1 and class II division 2 malocclusion

The purpose of this study was to evaluate the cephalometric skeletal and dental characteristics related with class II division 1 and class II division 2 malocclusions in the sagittal and vertical dimensions. Lateral cephlaograms of 100 patients for both genders were used to determine the characteristics of class II div 1 and class II div 2 malocclusion. The data base was developed in SPSS 11 for windows. In sagittal plane, mandible was more retrognathic in class II/1 than class II/2 malocclusion. Vertically, all the measurements were significantly reduced for class II div 2 malocclu-sion, indicative of a skeletal deep bite. Upper incisors were proclined in class II/1 and retroclined in class II/2 patients. Lower incisors were proclined in class II/1 while normally inclined in patients of class II/2 malocclusion. Class II/1 malocclusion is associated with more retrognathic mandible, proclined upper and lower incisors. Class II/2 malocclusion is associated with a lower anterior facial height and retroclined upper incisors