Prosdodontics

Question 1

T/F: An I Bar Clasp has a supra-bulge retainer approach

Answer 1

False, I Bar Clasps extends over the mucosa and reaches the bottom 1/3rd of the crown along the long axis of the tooth

Question 2

When should titanium dentures be considered

Answer 2

When weight and thickness are an issue - they are a lightweight but strong material but expensive to fabricate due to their high melting point

Question 3

What is Maxillofacial Prosthodontics?

Answer 3

Restoration of stomatognathic (Teeth/Jaw/Soft Tissue) and craniofacial (Head and Neck) structures with prostheses due to serious trauma or head/neck cancers.

This is a specialisation of prosthodontics reserved largely for specialists and work with OMFS.

Question 4

Why would you consider an acrylic denture over a chrome denture?

Answer 4

When there is higher variability in patient’s tooth and gum health such that dentition and alveolar bone height is more likely to change in the 0-5 year timeframe

Question 5

Why would you consider an chrome denture over a acrylic denture?

Answer 5

Better physical properties
More durable (10 year lifespan)

Question 6

Under what circumstances is a bounded saddle more likely to be effective?

Answer 6

1. When there are teeth on the opposite side

2. When occlusal rests can be achieved

Question 7

Where does the support for a free end saddle come from?

Answer 7

The mucosa that sits under the free end saddle

Question 8

Why would a denture design feature a lingual plate?

Answer 8

When it’s likely that the existing dentition will be compromised so the support will come from the lingual mucosa

Question 9

What is the benefit of a Molloplast Soft Base when designing a full arcylic denture?

Answer 9

It has a silicon rubber based, bonded to the arcylic to provide more comfort to the patient.

Question 10

When doing an initial patient examination, what criteria need to be assess for a patient’s existing prosthetic?

Answer 10

1. Identify the Type: Partial vs Full
2. Material: Acrylic, Chrome, Titanium, Gold
3. Denture experience of patient: how long, what type?
4. Is the patient happy with denture and fit? Fit, Comfort
   Function: Speech, Mastication, Appearance
5. How long with current denture? Where was it made? Condition? Good Design?

Question 11

What criteria need to be assessed in a new denture after it has been fit?

Answer 11

Appearance
Speech
Retention
Stability: function? Use fingers to attempt to move out of place
Design
Extensions: does it impinge onto soft tissues?