orthognathic ridge relationship (class II) present several problems which should be taken into consideration when constructing a complete denture prosthesis. These include all EXCEPT:
a- require minimum interocclusal distance***
b- have a great range of jaw movement
c- require careful occlusion, usually cuspless teeth are indicated
RESIDUAL RIDGE RELATIONSHIP: Class II or retrognathic is usually difficult as the patient looks toothy, often holds the mandible forward to improve appearance with subsequent TMJ problems, usually have a great range of jaw movements in function, require careful occlusion, and usually needs a large interocclusal distance. Class Ill or prognathic is usually easier if not extreme. The patient usually functions on a hinge (little or no protrusive component) and requires a minimum of interocclusal distance. In any case, do not set the teeth for a retrognathic or prognathic patient in a normal relationship, unless there is only a moderate deviation from Class I.
RESIDUAL RIDGE RELATIONSHIP: Class II or retrognathic is usually difficult as the patient looks toothy, often holds the mandible forward to improve appearance with subsequent TMJ problems, usually have a great range of jaw movements in function, require careful occlusion, and usually needs a large interocclusal distance. Class Ill or prognathic is usually easier if not extreme. The patient usually functions on a hinge (little or no protrusive component) and requires a minimum of interocclusal distance. In any case, do not set the teeth for a retrognathic or prognathic patient in a normal relationship, unless there is only a moderate deviation from Class I.
