Assessment of Dental Parameters in Class 2 patients undergoing Functional Appliance Therapy and its association with other factors

Abstract

Introduction: For Class-II malocclusions, cosmetic improvement is the key cause of orthodontic therapy. By removing unfavorable developmental circumstances and enhancing the muscular environment surrounding the teeth, functional appliance therapy aims to improve the functional relationships of dentofacial structures. Any form of functional appliance therapy's overall treatment result involves both skeletal and dental modifications that transform a Class-II occlusion into a Class-I occlusion. William Clark unveiled his latest appliance, the Twin block, in 1982 (TB). Due to its design and patient-friendly attributes, it has acquired widespread acceptance. In contrast to all other functional appliances, the Twin block is constructed from two independent, non-connected occlusal blocks. They establish contact through an inclined plane that is built to favourably direct occlusal pressures by functionally dislocating the mandible.

Materials and Methods: The measurements of U1 to NA, L1 to NB, IMPA, Overjet and Overbite were chosen to evaluate dental effects contributing to the responses with Twin block therapy. 20 patient who have undergone orthodontic correction in Saveetha Dental College and Hospitals were included in the study.

Results: The cephalometric analysis shows, the overjet and overbite have reduced significantly. There is an increase in the IMPA, whereas there is no change in both linear and angular measurements of U1 to NA. Linear dimension of L1 to NB has reduced whereas the angular dimension has increased.

Conclusions: Within the limitations of the study, it can be concluded that after cephalometric analysis of the dental landmarks before and after twinblock therapy, the patients have a 100% satisfaction rate and class II patients should be encouraged to wear the appliance for best results.