Setting teeth in a Class I when its a Class II jaw relation

What would the problems a patient with a Class II jaw relationship could possibly encounter if a full maxillary and mandibular denture for that patient were set up in a Class I occlusion.

                                                                                                                      

Exaggerated labial and buccal position of mandibular teeth would create:

·         Labial lip infringement of mandibular anteriors if set into normal Class I relationship.

·         Denture tilting when incising

·         Injury to ridge and soft tissues

·         Phonetic problem (S and th)

·         Possible aesthetic disfiguration leading to psychological problems (self conscious and uncomfortable with the dentures)

·         Insufficient maxillary labial support due to compromising maxillary anterior position to reduce the labial overjet.

·         Change in lip and cheek muscle support if mandibular posterior teeth are set off the ridge in an exaggerated buccal position to occlude with maxillary posterior teeth in Class I position.

·         Lever action and dislodgement of mandibular denture during function

(leverage stresses could also lead to possible fracture of mandibular denture)

·         Denture tilting when incising