Functional Regulator-Frankel appliances

FRII

適用: Class II , Division 1&2

咬腊: Vertical – 3-mm in bicuspid area;   Anterior/posterior –Take bite with mandible advanced 3 -4m m

 

 

 

FRIII

適用: Class III

咬腊: Minimal—approx .1-mm in molar area; Anterior/posterior—Take bite with mandible in most retruded position

 

 

FR  IV