Metal-Ceramic Crown

Front 1

METAL CERAMIC CROWN (PFM) OF MANDIBULAR INCISORS CONTAIN

Back 1

1 BUCCAL DISAPPEARING MARGIN
2. LINGUAL METAL

Front 2

METAL CERAMIC CROWN (PFM) FOR CANINES CAN CONTAIN

Back 2

1. BUCCAL DISAPPEARING MARGIN
2. LINGUAL METAL
3. ABUTMENTS FOR RPDD

Front 3

METAL CERAMIC CROWN (PFM) FOR MAXILLARY CONTAINED

Back 3

1. BUCCAL DISAPPEARING MARGIN
2. LINGUAL 1MM METAL COLLAR

Front 4

TYPE OF MARGIN ON MAXILLARY CANINES THAT CONTAIN METAL CERAMIC CROWN (PFM)

Back 4

1. 360 PORCELAIN MARGIN
2. BUCCAL: BUTT JOINT MARGIN
3. LINGUAL: DISAPPEARING MARGIN

Front 5

MARGIN METAL CERAMIC CROWN IS HAVE

Back 5

1. DEEP CHAMFER MARGIN

Front 6

METAL CERAMIC RESTORATION CONSISTS OF METAL SUBSTRUCTURE (FRAMEWORK) SUPPORTING A

Back 6

1. CERAMIC VENEER THAT IS MECHANICALLY AND CHEMICALLY BONDED TO IT

Front 7

MEASURMENT DEEP CHAMFER MARGIN OF METAL CERAMIC CROWN CAST METAL SUBSTRUCTURE

Back 7

1. 0.2 MM
2. 0.3 MM

Front 8

MEASUREMENT OF THE FUSED PORCELAIN ON A METAL CERAMIC CROWN W/ DEEP CHAMFER MARGIN

Back 8

1. 1.2 MM

Front 9

FRAMEWORK OF METAL CERAMIC CROWN MUST HAVE A THICKNESS TO RESIST DEFORMATION

Back 9

1. 0.3 MM FOR GOLD BASED ALLOYS
2. 0.2 MM FOR HIGH STRENGTH NON GOLD BASE METAL ALLOYS

Front 10

FOR STRENGTH THE THICKNESS OF A CERAMIC VENEER MUST NOT BE

Back 10

1. GREATER THAN 2MM
2. MINIMUM THICKNESS OF 1MM IS NEEDED FOR AN ESTHETICALLY PLEASING RESTORATION

Front 11

DEEP CHAMFER OR SHOULDER MARGIN IN PFM IS

Back 11

1. 1.25 MM

Front 12

AXIAL REDUCTION IN PFM SHOULD BE

Back 12

1. 1.25-1.5 MM
2. 2-5 DEGREE TAPER

Front 13

OCCLUSAL REDUCTION IN PFM SHOULD BE

Back 13

1. 1.5-1.75 MM

Front 14

MARGIN LIMITED TO ANTERIOR AND PREMOLARS

Back 14

1. PORCELAIN BUTT MARGIN

Front 15

SIGNS THAT INDICATE METAL CERAMIC (PFM)CROWN PREPARATION

Back 15

1. EXTENSIVE CORONAL TOOTH DESTRUCTION BY CARIES OR TRAUMA
2. REPLACEMENT OF LARGE DEFECTIVE RESTORATIONS AND RESTORATION OF TEETH WHERE SPLITTING OF THE CUSP MAY EVENTUALLY OCCUR
3. TEETH W/ TRAUMATIC FRACTURE WHERE INCISAL ANGLES OR CUSP ARE INVOLVED
4. TEETH WHERE FULL COVERAGE IS NECESSARY FOR ESTHETIC REASONS
5. OCCLUSAL CORRECTIOS AND IMPROVEMENT OF FUNCTION AND ALIGNMENT
6. RESTORATION OF TEETH W/ RCT
7. ABUTMENT RETAINER IN FIXED AND REMOVABLE PARTIAL PROSTHODONTICS

Front 16

CONTRAINDICATION OF PFM

Back 16

1. SMALL INCISOR TEETH, LOWER INCISORS, EXCEPT WHERE HIGH FRACTURE RESISTANCE IS REQUIRED; EX: INADEQUATE TOOTH SUPPORT
BRUXISM
DEFLECTIVE MALOCCLUSION
2. ADOLESCENT TEETH WHERE MININMAL TOOTH PREP IS ESSENTIAL DUE TO THE LARGE SIZE OF THE PULP
3. ADULT TEETH WHERE ENAMEL WEAR IS HIGH AND THERE IS INSUFFICIENT BULK OF TOOTH STRUCTURE TO ALLOW FOR METAL AND PORCELAIN
4. FULL PORCELAIN OCCLUSION IN PATIENTS W/ PARAFUNCTIONAL HABITS

Front 17

ADVANTAGES OF METAL CERAMIC (PFM) CROWN

Back 17

1. GOOD ESTHETICS
2. VERY HIGH STRENGTH DUE TO PREVENTION OF CRACK PROPAGATION OF PORCELAIN FROM THE INTERNAL SURFACES OF CROWNS BY THE METAL REINFORCEMENT
3. CAN BE USED FOR FIXED BRIDGE WORK
4. IMPROVED FIT ON INDIVIDUAL CROWNS PROVIDED BY CAST GOLD COLLAR WHEN COMPARED TO ALL CERAMIC CROWN

Front 18

DISADVANTAGES OF PFM

Back 18

1. MORE TOOTH REDUCTION
2. EXCESSIVE WEAR
3. GINGIVAL IMVOLVEMENT
4. DEPTH OF TRANSLUCENCY IN CROWN DUE TO MIRROR
5. AFFECTED BY THE CREEPL OF THE METAL
6. MORE DIFFICULTY IN OBTAINING GOOD ESTHETIC THAN W/ ALL CERAMIC RESTORATION

Front 19

CHARACTERISTIC OF GINGIVAL FINISH LINE THAT CONTAIN CHAMFER

Back 19

1. DISTINCT MARGIN ADEQUATE BULK
2. CARE NEEDED TO AVOID UNSUPPORTED LIP OF ENAMEL
3. RECOMMENDED FOR CAST METAL RESTORATION
4. LINGUAL MARGIN OF METAL CERAMIC CROWN

Front 20

CHARACTERISTICS OF GINGIVAL FINISH LINE THAT CONTAIN DEEP CHAMFER

Back 20

1. BULK OF RESTORATION MATERIAL
2. LESS CONSERVATIVE OF TOOTH PREP
3. RECOMMENDED FOR FACIAL AND LINGUAL MARGIN OF METAL CERAMIC CROWNS. COMPLETE CERAMIC CROWN

Front 21

CHARACTERISTICS OF GINGIVAL FINISH LINE OF PFM ASSOCIATED W/ SHOULDER

Back 21

1. BULK OF RESTORATION MATERIAL
2. LESS CONSERVATIVE OF TOOTH PREP
3. RECOMMENDED FOR FACIAL AND LINGUAL MARGIN OF METAL-CERAMIC CROWNS, COMPLETE CERAMIC CROWN

Front 22

FLAT END TAPER ROUNDED SHOULDER IS CHARACTERISTIC OF

Back 22

1. MODIFIED SHOULDER

Front 23

BUR USED FOR INITIAL INTERPROXIMAL REDUCTION OR CUSP BEVELS

Back 23

1. FLAME DIAMOND BURS

Front 24

BURS USED FOR AXIAL REDUCTION, INTERPROXIMAL REDUCTION AND OCCLUSAL REDUCTION

Back 24

1. ROUNDED TAPER BURS

Front 25

METAL CERAMIC CROWN PREPARATION SEQUENCE

Back 25

1. INITIAL INTERPROXIMAL REDUCTION
2. AXIAL REDUCTION
3. FUNCTIONAL CUSP BEVEL
4. OCCLUSAL REDUCTION
5. FINAL AXIAL AND OCCLUSAL MODIFICATION

Front 26

MARGIN PRODUCE INITAL INTERPROXIMAL REDUCTION

Back 26

1. FEATHER EDGE GINGIVAL FINISH LINE

Front 27

MEASUREMENT OF SPACE CREATED B/W THE PREPARED AND UNPREPARED TOOTH

Back 27

1. 1-1.25 MM

Front 28

WHERE IS DEPTH CUTS OF 1.25 MM PLACE USING ROUND END TAPERED PLACED

Back 28

1. BUCCAL
2. LINGUAL SURFACE

Front 29

FINAL CLEARANCE OF OCCLUSAL REDUCTION

Back 29

1. 1.5-1.75 MM

Front 30

MARGIN PRODUCE INITAL INTERPROXIMAL REDUCTION

Back 30

1. FEATHER EDGE GINGIVAL FINISH LINE

Front 31

MEASUREMENT OF SPACE CREATED B/W THE PREPARED AND UNPREPARED TOOTH

Back 31

1. 1-1.25 MM

Front 32

WHERE IS DEPTH CUTS OF 1.25 MM PLACE USING ROUND END TAPERED PLACED

Back 32

1. BUCCAL
2. LINGUAL SURFACE

Front 33

FINAL CLEARANCE OF OCCLUSAL REDUCTION

Back 33

1. 1.5-1.75 MM