Clinical Evaluation & Adjustment

Question 1

What to check during FP try in?

Answer 1

1. Proximal contacts
2. Internal fit
3. Stability
4. Marginal integrity
5. Contours
6. Occlusion
7. Staining
8. Finish

Question 2

How to remove excess provisional?

Answer 2

Water and pumice

Question 3

What are the key features of proximal contacts?

Answer 3

1) position
2) size
3) tightness
- patient feel
- floss test
- spray occlude
- NO articulating paper (blue thicker -> for removable) (red for FP) -> AT most use for anterior teeth

Question 4

How to adjust excess and deficient proximal contacts? (Metal/porcelain)

Answer 4

Excess:
- metal -> grind and repolish
- porcelain -> grind (no metal burs) and finish (brownies)

Deficient:
- metal -> add on solder
- porcelain -> correction porcelain, LFC

Question 5

How to test for marginal integrity of FP

Answer 5

1) Vertical discrepancy
2) Horizontal discrepancy
3) Visual - light and magnification
4) Tactile - sharp explorer

• check mid buccal, mid palatial of FP in patient

Question 6

What is spray occlude used for?

Answer 6

• Detect binding to axial wall/occlusal of prep
• remove excess to fit FP

Question 7

What should you check for coutour/aesthetics

Answer 7

1) incisal edge
- 1-2mm show with upper lip relaxed
2) smile line
- young (more curved)
- class 2 (more exaggerated)
- class 3 (reversed smile line)
3) occlusal plane
- parallel to interpupillary line
4) arrangement and form
5) relative tissue levels
6) Tooth line angles

Question 8

Describe possible glazing error

Answer 8

Bubbles appear after glazing WITHOUT vacuum -> last air firing stage

Question 9

When do you check for tooth shade?

Answer 9

• Check BEFORE procedure (before rubber dam)
• Avoid dehydration of adjacent natural teeth (appear lighter)

Question 10

Name the ideal characteristics for an ideal cement

Answer 10

1) Long working time
2) Adhesion to tooth structure
3) Adhesion to crown surface (ceramic or metal)
4) Seal
5) Nontoxic to pulp
6) Adequate physical properties
7) Low viscosity
8) Low film thickness
9) Low solubility long term
10) Good working characteristics
11) Good setting characteristics
12) Easily removed, clean up
13) Radioopaque

Question 11

How to clean FPD?

Answer 11

• Interdental brushes
• Floss threader
• Superfloss (not efficient for posterior bridges -> gets wet easily -> hard to insert)

Question 12

How to detect excess cement after cementation

Answer 12

• blow dry it
• very hard to detect interproximally