L8.Anatomy & Physio of Impression Taking

Question 0

What muscles bound the labial frenum in the maxillary?

Answer 0

Superior incisal muscles

Question 1

What can be done to improve esthetics for someone with a resorbed max labial vestibular area leading to a retrussive maxilla?

Answer 1

Build up the labial flange on the denture

Question 2

What bony structure limits the size of the denture in the buccal flange area of the maxillary denture?

Answer 2

Coronoid process of the mandible

Question 3

Why shouldn’t you pull down on the upper lip while border molding? What will result? What are the proper movements?

Answer 3

B/c the orbicularis oris muscle in that region moves in a lateral direction. Thus, pulling down on the lip in this area does not mimic any natural facial movements and will result in a foreshortened denture flange. Ask the patient to move their upper-lip side to side and pucker-up.

Question 4

To properly seat the posterior palatal seal, what should u ask the patient to do?

Answer 4

Swallow

Question 5

Why is the center of the border molding wax removed in the posterior palatal seal area to make the butterfly shape?

Answer 5

B/c of the mid-palatal suture is a raised area with thin keratinized tissue that is vulnerable irritation. It is also the part of the hard palate that extends most posteriorly

Question 6

When should the window tray impression technique be used? What is the purpose.

Answer 6

When there is an excess of soft tissue in an edentulous maxillary rim that is opposed by a dentate mandibular rim. This is too reduce pressure on the movable tissue and reduce maxillary alveolar bone resorption