Prosthodontics

Question 1

The distobuccal extension of a mandibular custom tray for a completely edentulous mandible when border molding is determined by:

Answer 1

position and action of masseter muscle

Question 2

The distolingual extension of a mandibular custom tray for a completely edentulous mandible when border molding is determined by:

Answer 2

action of superior constrictor muscle

Question 3

Proper extension into which area provides the best support for a mandibular denture?

Answer 3

Buccal shelf (buccal vestibule)

Question 4

What marks the distal termination of the edentulous ridge during border molding?

Answer 4

Retromolar pad

Question 5

The flange in which area must accommodate movement of the mylohyoid muscle in swallowing?

Answer 5

Mylohyoid area

Question 6

What are the two most important considerations in checking custom trays for accurate border molding?

Answer 6

1) Stability

2) Lack of displacement

Question 7

Why is under extension of the peripheral border of a mandibular complete denture bad?

Answer 7

Decreases tissue bearing surfaces so there is a decrease in denture stability

Question 8

What happens if the mandibular complete denture base terminates short of the retromolar pad?

Answer 8

You’ll see marked ridge resorption

Question 9

T/F: mandibular complete dentures rely on suction from a peripheral seal for retention

Answer 9

False. They rely on denture stability covering as much of underlying basal bone in retromolar pad without impinging on muscle attachments (Max CD relys on suction)

Question 10

Which two anatomic landmarks determine the extension of the mandibular denture flange in the mandibular anterior labial area?

Answer 10

Mentalis

Mucolabial fold

Question 11

Which muscle limits the lateral movement of a complete mandibular denture?

Answer 11

Masseter muscle

Question 12

Is a denture reline indicated when there is a large decrease in vertical dimension?

Answer 12

No. New dentures are indicated