How are porcelain-fused-to-metal crowns secured?
During functional use in the mouth, porcelain crowns inevitably undergo influence from surrounding lip, cheek, and tongue muscles. If the denture base and artificial tooth positions are appropriate, combined with the patient's practice and gradual adaptation, they can learn to control the denture's position using muscular force.
Beyond atmospheric pressure and suction, a crucial biological force contributes to the retention of complete dentures: the control exerted by oral and facial muscles, particularly the lips, cheeks, and tongue. Previous theories focused solely on the influence of physical principles, overlooking the vital role of biological forces in denture retention. In reality, these biological forces play a more significant role than purely physical principles.