ABSTRACT
Objective: To assess the depth of curve of Spee [COS] in different malocclusion groups, to relate this to the maxillo-mandibular discrepancy using ANB, and to determine whether the depth of curve of Spee is affected by maxillo-mandibular discrepancy. Study Design: Descriptive cross sectional study. Place and Duration of Study: The study was conducted at KRL General Hospital Orthodontic Department, from Aug 2017 to Jan 2018
Material and Methods: One hundred and fifty patients between 18-40 years of age were recruited after filling data collection pro forma from their initial lateral cephalometric radiographs and initial study models. Data was recorded in specially made pro forma and analyzed using SPSS 20.0. Analysis included frequencies, mean +/- standard deviation [SD] and Pearson correlation. A p-value <0.001 was considered significant
Results: Results have established a positive correlation between curve of Spee and ANB values with a highly significant p-value of <0.001. As the value of ANB increases so does the depth of curve of Spee and vice versa
Conclusion: There is a significant difference amongst curve of Spee values of class 1, class II and class III malocclusions which is linearly coherent with ANB values
ABSTRACT
Objective: To assess reduction of profile convexity, correction of molar and canine relationship and achievement of normal over jet using Clark's Twin Block appliance in growing subjects having skeletal class II patterns
Study Design: Descriptive case series
Place and Duration of Study: The study was conducted at KRL General Hospital Orthodontic department from Aug 2017 to Jan 2018
Material and Methods: Fifty patients between 11-14 years of age were recruited having cervical maturation [CVM] stage 3 as diagnosed by their lateral cephalogram. Only Skeletal class II patients as confirmed by ANB values of >4 and SNB values of <78 having low angle [SN-MP] are included in this study. Good quality radiographs and study models are obtained at start of treatment T and at the end of achievement of results T1. Data was recorded in specially made proforma and analyzed using SPSS 20.0. Analysis included frequencies, Mean +/- standard deviation [SD] and paired t test. A p-value<0.05 was considered significant
Results: Results have established positive impact of Twin-Block appliance therapy in patients with CVM stage 3 paired. I-test has revealed significant reduction in values of over jet and correction of class II molars and canines. Skeletal profile convexity has also been reduced by significant reduction in angle of convexity
Conclusion: This study has demonstrated that successful management of the first phase of treatment of a patient with Angle's Class II Division I malocclusion using the twin block appliance can be achieved with significant outcomes