Crown & Bridge

Slide Review Atlas for Fixed Prosthodontics

For Third Year students

By :- Assist. Lect. Sinan A. Shwailiya

Retainer pontic connector Components of bridge

Indications for crown 1-Tooth with large defect filling

2- Discolored or fractured tooth

3- tooth with large carious lesion

4- as a retainer for bridge

Types of crowns

1-Full metal crown

2- metal with facing (metal ceramic crown) Porcelain fused to metal crown

Labial shoulder

and lingual chamfer

3- Jacket crown (shoulder labial and lingual)

4- Partial coverage three quarter crown

5- Post crown

Peeso Reamer bur for praparation of post space

Plastic post

Preparation for post crown

Preparation for full metal crown chamfer margin all around the tooth

Metal with facing (porcelain fused to metal crown) the margin is chamfer lingually and shoulder buccally

Preparation of Jacket crown (The margin is shoulder all around the tooth)

Margin designs: A, Featheredge. B, Chisel. C, Chamfer. D, Bevel. E,

Shoulder. F, Sloped shoulder. G, Beveled shoulder

(Indication of each type is required mentioned in Lec3)

Round ended Flat ended Pointed Diamond disk Diamond tapered fissure bur or wheel shaped bur

Burs for crown preparation

Gingival Retraction cord

for control of bleeding and moisture

Impression techniques:

1-Single stage (Double mix)

light body silicone

Impression syringe

Single stage light body + Heavy body poly silicone impression material

Two stages Impression (Putty wash technique) 1-1st impression with heavy body 2- the area of prepared tooth is cut from the impression 3- light body is painted and other impression is taken

Temporary crowns

Poly carbonate ready made crown

acrylic custom made crown

Preformed (ready made) metal temporary crowns for posterior teeth: a- Anatomic b- nonanatomic

2 units post crown : post, core, outer crown

Indirect custom made temporary bridge celluloid acetate template

self cure acrylic is used for it

Acrylic direct ( chairside) Temporary bridge

It is made by the use of poly silicone imp. Mat.

Celluloid Acetate template for construction of temporary bridge

Vacuum device used for construction of the template

Working cast and Removable Die

Dowel pin used for removable die

Removable die

Solid cast and individual die

Alternative Die system (Di-Lok) System

Procedure for making Die by the dentist

Solid cast and Individual Die

Construction of Wax Pattern

Waxing instruments for construction of wax pattern

Metal cast bridge 1- prepared teeth

2- Wax pattern

3- Finished prosthesis

Components of the Casting Ring ( )

Crucible former Sprue

Wax Pattern (attached to sprue to be mounted in the casting ring)

Casting Ring

Ring Liner

Vacuum Investing machine

Investing technique

Wax burnout furnace

Centrifugal Casting machine