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

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