Chapter 1.2

Question 1

Primary causes of failure of d crown r as ff: CPE

Answer 1

1. Carious lesions
2. Periodontal dx
3. Endodontic tx

Question 2

FPD

Answer 2

3 unit bridge > single post missing tooth

Question 3

FPD have been d tx of choice for more than half a century due to the ff benefits:

Answer 3

1. It can be fabricated in less than 2 weeks
2. It meets the criteria for normal masticatory function, speech, contour, comfort, esthetics, & health

Question 4

Drawbacks of FPD:

Answer 4

1. Necessitates replacement when the prosthesis fails and/ or abutments teeth r lost
2. Requires additional pontics & abutment teeth when the bridge needs to be replaced
3. Abutment teeth r susceptible to carious lesions
4. Abutment teeth w/ sound tooth structure r sacrificed

Question 5

Single tooth dental implants

Answer 5

Tx alternative to replace a missing tooth

Question 6

Single tooth dental implants: False concept of continuing to suggest a FPD for pxs due to the ff reasons:

Answer 6

1. General ease if d clinical procedure
2. Requires less tx time

Question 7

Benefits of single tooth dental implants r as follows:

Answer 7

1. Reduces the risk of forming carious lesions & periodontal dx on abutment teeth
2. Diminishes d loss if abutment teeth
3. Lessens d risk of developing endodontic problems on adjacent teeth
4. Decreases cold & contact sensitivity of d adjacent teeth
5. Preserves the sound tooth structure of the adjacent teeth and enables dentists to suggest another tx option from pxs
6. Improves ability to clean d proximal surfaces of adjacent teeth
7. Enhances and/or compliments the esthetics of d adjacent teeth
8. Refined d maintenance of bone in the edentulous site
9. Provides a psychological advantage
10. Ensures a high success rate of >97% for 10 yrs

Question 8

Drawbacks of single tooth dental implants r as follows:

Answer 8

1. Entails a surgical procedure that is more invasive & increasingly complex than a 3 unit FPD
2. Costly tx alternative

Question 9

Partial edentulism

Answer 9

• Partially dentate px have an average of 23 teeth
• Post teeth > most common missing teeth

Question 10

Pxs w/ partial free edentulism (PFE) r typically replaced w/ removable partial dentures > age groups:

Answer 10

1. Adult pxs between 25 - 44 yrs of age: uilateral edentulism
2. Adult pxs between 45-54 yrs of age: one FEE in one quadrant, 50% bilateral partial edentulism
3. Adult pxs between 55-64 yrs of age: 35% mandibular PFE & 18% maxillary PFE
4. Geriatric pxs more than 65 yrs of age: PFE in both arches