Lecture 3 Introduction to Fixed Prosthodontics

Question 1

when are fixed pros and full coverage preps indicated

Answer 1

where there has been extesnive coronal destruction
-caries
-trauma
-previous restorations
- endodontically treated posterior teeth
- where maximum retention and resistance form is needed
- where axial and occlusal contours require substantial correcton

Question 2

when are fixed pros and full coverage restorations contraindicated

Answer 2

-where a more conservation restoration can function
-esthetics

Question 3

what is the complete metal crown preparation sequence

Answer 3

-occlusal reduction/functional cusp bevel
- axial reduction
-proximal reduction
-secondary retentive features
-margination

Question 4

what bur is used for occlusal reduction

Answer 4

round end taper diamond

Question 5

how big is the occlusal reduction

Answer 5

1.5 clearance on functional cusps and central groove
-1 mm reduction on non-functional cusps

Question 6

what bur is used for facial and lingual axial reduction

Answer 6

-round end taper diamond or small chamfer tapered diamond

Question 7

what is the adequate reduction for facial and lingual

Answer 7

0.5-1mm

Question 8

what burs do you use for proximal axial wall reduction

Answer 8

-needle chamfer, diamond, small chamfer, diamond