Lecture 13 - Overdenture

Question 1

Minimum height for locator attachment

Answer 1

10.35 (or 12 mm)

Tissue height (3 mm) + supra-gingival abutment and housing height (2.35) + acrylic (2 mm)+ tooth stock (3 mm)

Question 2

What abutment system for divergent implants? (Angulation?)

Answer 2

ERA attachment

- 0, 5, 11, 17

Question 3

1. Height for ball attachment

2. Angulation?

Answer 3

1. 10 to 12 mm

2. 10-30 degrees

Question 4

What kind of retention bar in splinted implants w/ bar?

- How much width needed?

Answer 4

Hader bar (requires 13 mm)

Question 5

When should you consider bar for over denture attachment?

Answer 5

1. Anatomic structures need protection and retrievability for oral hygiene needs to be maintained
2. Implants >30 degree divergence

Question 6

Difference between attachment systems and patient satisfaction?

Answer 6

No significant difference

Question 7

How does off parallel implant placement affect longevity of retention systems?

Answer 7

Increases wear rates and decreases retention

Question 8

What are the four advantages to digital dentures?

Answer 8

1. Time
2. Pre-cured resin
3. Portability
4. Permanent digital record

Question 9

What are the five disadvantages to digital dentures?

Answer 9

1. Cost
2. Cases with limited restorative space
3. Static occlusal record (no excursive movements)
4. Not entirely digital
5. Many steps condensed into first visit