C & B Slides.pdf
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Transcript of C & B Slides.pdf
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Crown & Bridge
Slide Review Atlas for Fixed Prosthodontics
For Third Year students
By :- Assist. Lect. Sinan A. Shwailiya
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Retainer pontic connector Components of bridge
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Indications for crown 1-Tooth with large defect filling
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2- Discolored or fractured tooth
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3- tooth with large carious lesion
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4- as a retainer for bridge
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Types of crowns
1-Full metal crown
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2- metal with facing (metal ceramic crown) Porcelain fused to metal crown
Labial shoulder
and lingual chamfer
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3- Jacket crown (shoulder labial and lingual)
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4- Partial coverage three quarter crown
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5- Post crown
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Peeso Reamer bur for praparation of post space
Plastic post
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Preparation for post crown
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Preparation for full metal crown chamfer margin all around the tooth
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Metal with facing (porcelain fused to metal crown) the margin is chamfer lingually and shoulder buccally
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Preparation of Jacket crown (The margin is shoulder all around the tooth)
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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)
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Round ended Flat ended Pointed Diamond disk Diamond tapered fissure bur or wheel shaped bur
Burs for crown preparation
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Gingival Retraction cord
for control of bleeding and moisture
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Impression techniques:
1-Single stage (Double mix)
light body silicone
Impression syringe
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Single stage light body + Heavy body poly silicone impression material
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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
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Temporary crowns
Poly carbonate ready made crown
acrylic custom made crown
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Preformed (ready made) metal temporary crowns for posterior teeth: a- Anatomic b- nonanatomic
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2 units post crown : post, core, outer crown
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Indirect custom made temporary bridge celluloid acetate template
self cure acrylic is used for it
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Acrylic direct ( chairside) Temporary bridge
It is made by the use of poly silicone imp. Mat.
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Celluloid Acetate template for construction of temporary bridge
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Vacuum device used for construction of the template
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Working cast and Removable Die
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Dowel pin used for removable die
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Removable die
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Solid cast and individual die
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Alternative Die system (Di-Lok) System
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Procedure for making Die by the dentist
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Solid cast and Individual Die
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Construction of Wax Pattern
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Waxing instruments for construction of wax pattern
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Metal cast bridge 1- prepared teeth
2- Wax pattern
3- Finished prosthesis
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Components of the Casting Ring ( )
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Crucible former Sprue
Wax Pattern (attached to sprue to be mounted in the casting ring)
Casting Ring
Ring Liner
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Vacuum Investing machine
Investing technique
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Wax burnout furnace
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Centrifugal Casting machine