1. INTRODUCTION & Types of dental
TERMINOLOGY crown
Part I: General
considerations

2. According to retention*, dental
crown classified as follows:
1. Extra-coronal restorations
2. Intra-coronal restorations
3. Intra- radicular restorations
*Retention: is the maintenance of dental prosthesis in
proper position in the mouth.

3. Restorations used to cover the external part
of the damaged coronal portion of the tooth.
According to the surface coverage, extra-coronal
restorations classified as:
1. Full coverage restorations:
that means, restorations that cover the
entire coronal portion of the crown.
2. Partial coverage restorations:
cover just a portion of the crown.

4. These are used to restore all surfaces of the
clinical crown.
an example seen in the picture.
And they are classified according
to the material used in their
construction, as:
1. Metal crowns (or restorations)
2. Non-metal crowns (or restorations)
3. Combination of both of the two above.
…each of these types will be discussed later.

5. These restorations are used to cover just a
portion of the clinical crown.
an example seen in the picture.
And according to retention, there are
Classified as:
1. Retention by grooves : ¾, R3/4, ½, 7/8
crowns (= restorations).
2. Retention by pins (pinledage).
3. Modified type (grooves + pins).
…each of these types will be discussed later.

6. Restorations used to cover a part of the
internal portion of the damaged natural
crown of the tooth.
Types:
- Inlays, and
- Onlays
(has been discussed before)

7. These restorations restore the endodontic-
ally treated tooth.
…….an example seen in the picture.
Types:
- according to retention:
- Retention by post
- Retention by post and core
-according to attachment:
- Attached
- Detached
- according to material used:
- all metal *Post crown: is an artificial restoration retained in position
by a post inserted in the prepared root canal and then
- combined covered by a crown constructed on full or partial metal
core.

8. Full coverage restoration, means:
a. restore the endodontically treated
tooth.
b. cover for the external surfaces of the
damaged clinical crown.
c. ½ crown.
True or False:
The intra-coronal restorations are restorations used to cover
the external part of the damaged clinical crown.
What does dental crown mean? Enumerate its several types.