MANAGEMENT OF SKELETAL CLASS II MALOCCLUSION WITH TWIN BLOCK APPLIANCE: A CASE REPORT

*Dr. Bina Nandi

ABSTRACT

The term “Functional appliance” refers to a variety of appliances designed to alter the arrangement of various muscle groups that influence the function and position of the mandible to transmit forces to the dentition and basal bone. Typically these muscular forces are generated by altering the mandibular position sagittally and vertically resulting in orthodontic or orthopaedic changes. The original concept of functional jaw orthopaedics essentially encompasses growth modulation for the correction of mandibular retrognathia i.e. skeletal class II malocclusion not by active forces of appliance but by the forces generated from the muscles when the mandible is held forward. The functional force indirectly produce growth modulation and bring about changes in jaw bones. This case report presents first phase of correction of class II malocclusion due to mandibular retrognathism by use of Twin Block appliance at growing age. Later 2nd phase of treatment was done by preadjusted edgewise technique.

Keywords: Functional appliance, Retrognathia, Twin Block, Visual Treatment Objective.