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95 Cards in this Set
- Front
- Back
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HE RECEIVES THE FIRST PATENT FOR PORCELAIN TEETH
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1. NICOLAS DUBOIS DE CHEMANT
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FIRST TO DESCRIBE THE ALL-CERAMIC CROWN FABRICATION PROCESS IN DETAIL AND DESCRIBING A SHOULDER FINISH LINE
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1. EDWARD SPALDING
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AN EXTRACORONAL RESTORATION USED TO RESTORE MISSING TOOTH STRUCTURE
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1. CROWN
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MATERIALS SURROUNDING THE REMAINING STRUCTURE OF CROWN
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1. CAST METAL
2. PORCELAIN 3. COMBINATION OF METAL AND PORCELAIN |
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PRINCIPLES OF TOOTH PREPARATIONS
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1. PRESERVATION OF TOOTH STRUCTURE
2. RETENTION AND RESISTANCE 3. STRUCTURAL DURABILITY 4. MARGINAL INTEGRITY 5. PRESERVATION OF THE PERIODONTIUM |
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PRINCIPLE OF TOOTH PREPARATION STATES THE AMOUNT OF TOOTH REDUCTION DEPENDS ON THE RESTORATION DESIGN. CROWN REPLACES DESTROYED TOOTH STRUCTURE AND PRESERVE REMAINING SOUND TOOTH STRUCTURE
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1. PRESERVATION OF TOOTH STRUCTION
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PREVENTS REMOVAL OF THE RESTORATION ALONG THE PATH OF INSERTION OR LONG AXIS OF THE TOOTH PREPARATION
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1. RETENTION FORM
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PREVENTS DISLODGMENT OF THE RESTORATION BY FORCES DIRECTED IN AN APICAL OR OBLIQUE DIRECTION AND PREVENTS ANY MOVEMENT OF THE RESTORATION UNDER OCCLUSAL FORCES
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1. RESISTANCE FORM
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RETENTION AND RESISTANCE FORM ARE INFLUCENCE BY
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1. DEGREE OF TAPER
2. TOTAL SURFACE AREA OF THE PREPARATION 3. PREPARATION HEIGHT 4. PATH OF INSERTION 5. ROUGHNESS OF THE TOOTH SURFACE |
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AN EXTRACORONAL RESTORATION USES OPPOSING EXTERNAL SURFACES(WALLS) FOR RETENTION
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1. DEGREE OF TAPER
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INCREASE ANGLE CAUSES INCREASE RETENTION
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1. DEGREE OF TAPER
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PROTHERO INDICATED THAT THE CONVERGENCE OF PERIPHERAL SURFACES SHOULD RANGE B/W
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1. 2-5 DEGREE
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______ ANGLE OF TOTAL OCCLUSAL CONVERGENCE (TOC) PRODUCED INADEQUATE RESISTANCE
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1. 22 DEGREE
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THERE IS NO SIGNIFICANT DIFFERENCE B/W RESISTANCE OF THESE ANGLE
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1. 10 AND 16 DEGREE
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TOC SHOULD BE B/W
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10 DEGREE AND 22 DEGREE
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FULL CROWN PREP IS MORE RETENTIVE ON A MOLAR THAN ON A PREMOLAR BECAUSE
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1. MOLAR PREP HAG GREATER SURFACE AREA
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RECOMMENDED OCCLUSOCERVICAL (OC)/ FACIOLINGUAL (FL) FOR ALL TEETH
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1. 0.4 OR HIGHER
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RATIO OF OC/FL WHEN TOC IS LESS THAN 5.8 DEGREE
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1. -0.1
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RATIO OF OC/FL WHEN TOC IS LESS THAN 11.6 DEGREE
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1. -0.2
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RATION OF OC/FL WHEN TOC IS LESS THAN 17.4 DEGREE
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1. -0.3
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RATIO OF OC/FL WHEN TOC IS LESS THAN 23.6 DEGREE
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1. 0.4
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CROWN RESISTANCE IS INADEQUATE WHEN PREP IS
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1. 10MM IN DIAMETER
2. 3.5 OC DIMENSION 3. 22 DEGREES OF TOC |
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TOC VALUE WHICH IS INADEQUATE FOR MOLAR TEETH
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1. 0.35 RATIO
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WHY MUST THE LENGTH OF PREP BE GREAT ENOUGH
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1. TO INTERFERE W/ THE ARC OF THE CASTING PIVOTING
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PREPARATION ON A TOOTH W/ A SMALLER DIAMETER RESISTS PIVOTING MOVEMENT BETTER THAN
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1. PREP OF EQUAL LENGTH ON A TOOTH OF LARGER DIAMETER
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HOW CAN RESISTANCE TO DISPLACEMENT FOR A SHORT-WALLED PREPARATION ON A LARGE TOOTH BE IMPROVED
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1. PLACING GROOVE IN THE AXIAL WALLS
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MINIMAL OC DIMENSION REQUIRED TO PROVIDE ADEQUATE RESISTANCE FOR CROWN MADE TO FIT MAXILLARY INCISORS AND MANDIBULAR PREMOLARS PREPARED W/ MINIMAL TOC (6 DEGREE)
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1. 3.0 MM
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AN OCCLUSOCERVICAL (OC) DIMENSION PROVID INADEQUATE RESISTANCE AT 20 DEGREES AN ANGLE FREQUENTLY FORMED ON MANY MOLAR
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1. 3.0 MM
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MINIMAL OCCLUSOCERVICAL DIMENSION REQUIRED FOR MOLARS
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1. 4.0 MM
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MINIMAL OCCLUSOCERVICAL DIMENSION FOR OTHER TEETH
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1. 3.0 MM
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A TOOTH PREPARATIONS PROVIDE INCREASED RESISTANCE BECAUSE THEY POSSES CORNERS
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1. PYRAMIDAL TOOTH PREP
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HOW MIGHT TEETH THAT LACK NATURAL CICRUMFERENTIAL MORPHOLOGY( ROUND TEETH) AFTER TOOTH PREP SHOULD BE MODIFIED
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1. W/ GROOVES OR BOXES IN AXIAL SURFACE
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TEETH PREPARED W/ GREATER CONVERGENCE THAN MAXILLARY MOLARS
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1. MANDIBULAR MOLARS
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WHEN ARE AXIAL GROOVES/ BOXES BE USED ON MANDIBULAR MOLARS
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1. WHEN PREPARED FOR FPD (FIXED PARTIAL DENTURE)
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GROOVE WHICH PROVIDE COMPLETE RESISTANCE TO FACIOLINGUAL FORCES
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1. PROXIMAL GROOVES
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A GROOVE WHICH PROVIDE ONLY PARTIAL RESISTANCE TO FACIOLINGUAL SURFACES
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1. FACIAL OR LINGUAL GROOVES
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WHEN IS MAXIMUM RETENTION BE ACHIEVED IN THE PATHS OF WITHDRAWAL IN RETENTION AND RESISTANCE
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1. WHEN THERE IS ONLY ONE PATH ALONG WHICH A RESTORATION CAN BE REMOVES
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WHAT APPEARS TO ENHANCE THE FIT OF RESTORATION
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1. SMOOTH TOOTH PREPARATION
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SURFACE ROUGHNESS GENERALLY INCREASES RETENTION W/
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1. ZINC PHOSPHATE CEMENT
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COMBINATION OF SURFACE ROUGHNESS AND ___________ EFFECT HAS NOT BEEN DETERMINED
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1. ADHESIVE CEMENTS: GLASS IONOMER, RESIN, POLYCARBOXYLATE
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RECOMMENDED TOOTH SURFACE PREPARATION
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1. SMOOTH
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TWO DIMENSIONS OF THE PATH OF INSERTION
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1. FACIOLINGUALLY
2. MESIODISTALLY |
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A DIMENSION OF THE PATH THAT CAN AFFECT THE ESTHETICS OF THE CROWN
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1. FACIOLINGUAL ORIENTATION
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A DIMENSION OF THE PATH THAT CAN PREVENT THE SEATING OF THE CROWN
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1. MESIODISTAL INCLINATION
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A CHARATERISTIC A PATH OF INSERTION A PREPARATION MUST HAVE
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1. PARALLEL THE ADJACENT PROXIMAL CONTACT
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WHAT DEGREE DOES THE PATH OF INSERTION VARIES FROM THE LONG AXIS OF THE TOOTH
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1. 10 DEGREE
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ONE OF THE MOST IMPORTANT FEATURES FOR PROVIDING ADEQUATE BULK OF MATERIAL AND STRENGTH OF THE RESTORATION
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1. OCCLUSAL REDUCTION
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A REDUCTION WHICH SHOULD REPRODUCE BASIC INCLINED PLANES
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1. OCCLUSAL REDUCTION
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A FLAT OCCULSAL SURFACE MAY CAUSE WHAT TO A PREPARATION
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1. OVERSHORTEN A PREP
2. DECREASE RETENTION/ RESISTANCE |
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WHAT DOES NOT PROVIDE THE NEEDED SPACE FOR A RESTORATION OF ADEQUATE THICKNESS
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1. INADEQUATE OCCLUSAL REDUCTION
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A STRUCTURAL DURABILITY WHICH RESULT IN A CROWN W/ THIN AND WEAK WALLS
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1. INADEQUATE AXIAL REDUCTION
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A MORE COMMON RESULT OF INSUFFICIENT AXIAL REDUCTION IS
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1. OVERCONTOURED CROWN
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OVERCONTOURED CROWN WILL BE PRODUCE
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1. GINGIVAL INFLAMMATION
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A STRUCTURAL DURABILITY WHICH ALLOWS FOR ADEQUATE CROWN THICKNESS AND PROPER CROWN CONTOUR
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1. FUNCTIONAL CUSP BEVEL
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FAILURE TO PLACE A FUNCTIONAL CUSP BEVEL CAN RESULT IN
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1. THIN, WEAK CROWN
2. OVERCONTOURING 3. POOR OCCLUSION 4. OVERINCLINATION OF THE BUCCAL SURFACE 5. EXCESSIVE REMOVAL OF TOOTH STRUCTURE |
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GUIDELINES TO CONSIDERED WHEN SELECTING A GINGIVAL FINISH LINE FOR A PREPARATION
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1. EASE OF PREP W/O OVER REDUCTION
2. EASILY, IDENTIFY, CONTINUOUS LINE ON PREP, IMPRESSION AND WORKING DIE 3. DISTINCT BOUNDARY 4. SUFFICIENT BULK OF MATERIAL(WAX, ALLOY, PORCELAIN) 5. CONSERVATION OF TOOTH SURFACE |
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PERIPHERAL EXTENSION OF A TOOTH PREPARATION SHOULD HAVE A
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1. GINGIVAL FINISH LINES
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OUTER EDGE OF A CROWN, INLAY, ONLAY, OR OTHER RESTORATION SHOULD HAVE A
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1. MARGIN
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LEVEL OF THE DIAMOND BUR GRIT FOR GINGIVAL FINISH LINE: RED INDICATE
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1. FINE
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DIAMOND BUR GRIT FOR GINGIVAL FINISH LINE: NO LINE INDICATE
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1. MEDIUM
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DIAMOND BUR GRIT FOR GINGIVAL FINISH LINE: GREEN INDICATE
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1. COARSE
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DIAMON BUR GRIT FOR GINGIVAL FINISH LINE:BLACK INDICATE
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1. SUPER-COARSE
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NAME OF MARGINAL INTEGRITY-GINGIVAL FINISH LINES
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1. FEATHER EDGE
2. CHAMFER 3. DEEP CHAMFER 4. SHOULDER |
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FINISH LINE SELECTION SHOULD BE BASED ON
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1. TYPE OF CROWN/ RETAINER
2. ESTHETIC REQUIREMENTS 3. EASE OF FORMATION 4. PERSONAL EXPERIENCE |
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FEATHER EDGE OR FLAME DIAMOND BUR FOR GINGIVAL FINISH LINE- MARGINAL INTEGRITY ARE
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1. CONSERVATIVE OF TOOTH PREP
2. DOES NOT PROVIDE SUFFICIENT BULK 3. NOT RECOMMENDED FOR CROWN PREP |
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CHAMFER GINGIVAL FINISH LINE MARGINAL INTEGRITY ASSOCIATED W/
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1. DISTINCT MARGIN, ADEQUATE BULK
2. AVOID UNSUPPORTED LIP OF ENAMEL 3. RECOMMENDED FOR CAST METAL RESTORATIONS, LINGUAL MARGIN OF METAL-CERAMIC CROWNS |
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DEEP CHAMFER GINGIVAL FINISH LINES MARGINAL INTEGRITY IS ASSOCIATED W/
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1. BULK OF RESTORATIVE MATERIAL
2. LESS CONSERVATIVE OF TOOTH PREP 3. RECOMMENDED FOR FACIAL AND LINGUAL MARGIN OF METAL-CERAMIC CROWNS, COMPLETE CERAMIC CROWN |
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SHOULDER GINGIVAL FINISH LINES MARGINAL INTEGRITY IS ASSOCIATED W/
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1. BULK OF RESTORATIVE MATERIAL
2. LESS CONSERVATIVE OF TOOTH PREP 3. RECOMMENDED FOR FACIAL AND LINGUAL MARGIN OF METAL-CERAMIC CROWNS, COMPLETE CERAMIC CROWN |
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GINGIVAL FINISH LINES RECOMMENDED FOR PEDO CROWN BUT NOT ADULT
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1. FEATHER EDGE
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GINGIVAL FINISH LINES DIAMOND BUR ASSOCIATED W/ #6888
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1. FEATHER EDGE OR FLAME
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GINGIVAL FINISH LINE DIAMOND BUR ASSOCIATED W/ #6856,#856,#6856 SS
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1. CHAMFER
2. DEEP CHAMFER |
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MODIFIED CHAMFER AND DEEP CHAMFER GINGIVAL FINISH LINE ARE ASSOCIATED W/ BURS
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1. #6878
2.#878 |
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A GINGIVAL FINISH LINE BUR ASSOCIATED W FLAT END TAPERED ROUNDED SHOULDER
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1. SHOULDER
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GINGIVAL FINISH LINE ASSOCIATED W/ #6847
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1. SHOULDER
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ALL CERAMIC CROWN ARE LIMITED TO
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1. ANTERIOR TEETH
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PORCELAIN BUTT MARGIN MUST BE LIMITED TO
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1. ANTERIOR TEETH
2. PREMOLARS |
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PERIODONTIUM TISSUES PRESERVED IN CROWN PREP
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1. SUPRAGINGIVAL
2. SUBGINGIVAL |
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ADVANTAGES OF SUPRAGINGIVAL MARGINS
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1. EASIER TO PREPARE W/O TRAUMA TO THE SOFT TISSUE
2. LOCATED ON THE ENAMEL 3. MORE EASILY KEPT CLEAN 4. IMPRESSIONS ARE MORE EASILY MADE, LESS POTENTIAL FOR SOFT TISSUE DAMAGE 5. RESTORATIONS CAN BE EASILY EVALUATED |
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SITUATIONS WHICH INDICATE SUBGINGIVAL MARGIN
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1. SUBGINGIVAL CARIOUS LESIONS OR EXISTING RESTORATIONS, CERVICAL EROSION
2. PROXIMAL CONTACTS AREA EXTENDS TO THE GINGIVAL CREST 3. ADDITIONAL RETENTION IS NEEDED 4. MARGIN OF A METAL-CERAMIC CROWN IS TO BE HIDDEN FOR ESTHETICS REASONS 5. CONTROL OF ROOT SENSITIVITY 6. MODIFICATION OF THE AXIAL CONTOUR IS INDICATED |
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A PERIODONTIUM AT THE GINGIVAL FINISH LINE LOCATION IDENTIFIED AS A MAJOR FACTOR IN THE PERIODONTAL DISEASE, PARTICULARLY WHERE THEY ENCROACH ON THE EPITHELIAL ATTACHMENT
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1. SUBGINGIVAL RESTORATION
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3 THINGS WHICH OCCUR WHEN RESTORATION VIOLATE BIOLOGIC WIDTH
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1. CHRONIC PAIN
2. CHRONIC INFLAMMATION OF THE GINGIVA 3. UNPREDICTABLE LOSS OF ALVEOLAR BONE |
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MATERIAL FOR METAL CROWN
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1. NOBLE
2. HIGH NOBLE |
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MATERIAL FOR PFM CROWN
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1. NOBLE
2. HIGH NOBLE |
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MATERIAL FOR ALL-CERAMIC CROWN
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1. ZIRCONIA
2. PROCERA ALUMINA 3. GLASS CERAMIC |
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AXIAL REDUCTION FOR GOLD CROWN
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1. 1.00-1.25 MM
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OCCLUSAL./ INCISAL REDUCTION FOR GOLD CROWN
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1. 1.25-1.5 MM
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FINISH LINE DESIGN FOR GOLD CROWN
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1. CHAMFER: 0.5-0.8 MM
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AXIAL REDUCTION FOR PFM CROWN
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1. 1.25-1.5 MM
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OCCLUSAL/INCISAL REDUCTION FOR PFM CROWN
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1. 1.5-2.0 MM
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FINISH LINE DESIGN FOR PFM CROWN
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1. SHOULDER/ DEEP CHAMFER: 1.2-1.5 MM
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MARGIN DESIGN FOR THE RESTORATION OF PFM CROWN
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1. DISAPPEARING MARGIN ALL AROUND
2. DISAPPEARING MARGIN ON FACIAL EXTENDED TO PROXIMAL CONTACT AREA AND METAL COLLAR ON LINGUAL |
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AXIAL REDUCTION FOR ALL-CERAMIC CROWN
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1. 1.25-1.5 MM
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OCCLUSAL/INCISAL REDUCTION FOR ALL-CERAMIC CROWN
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1. 1.5-2.0 MM
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FINISH LINE DESIGN FOR ALL-CERAMIC CROWN
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1. DEEP CHAMFER OR ROUND SHOULDER: 1.0-1.5 MM
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