Denture tooth set up
Setting an ideal position of teeth for a lower full denture is of the utmost importance due to the almost universal instability of the lower full denture. One of my pet peeves is how the technician wants to set everything with an "anatomic" class 1 relationship. Tooth position can be in a wide range in the natural dentition but this is anchored in bone with periodontal ligament support. Because of this, natural dentition tooth position can exist outside the zone of soft tissue influence a la the neutral zone concept. The influence of external factors on tooth position becomes more obvious as there is loss of periodontal support in diseased states which allows buccal and lingual soft tissues as well as the occlusion to move the teeth resulting in flared teeth and diastemas. In contrast to the natural dentition, full dentures are at the mercy of the movement of soft tissues during speech and function which can affect their success if denture base extensions are improperly des...