Cements and Their Uses Flashcards by sophie rosen

TYPES OF
CEMENTS
(6)

ZINC PHOSPHATE
ZINC OXIDE EUGENOL
ZINC POLYCARBOXYLATE
GLASS IONOMER
RESIN-MODIFIED GLASS IONOMER
PROVISIONAL CEMENTS

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IT IS IMPORTANT TO NOTE THAT NO
CEMENT WILL PERFORM TO IT’S OPTIMAL
LEVEL CLINICALLY WITHOUT AN ADEQUATE
PREPARATION THAT INCLUDES (2)

GOOD

RESISTANCE AND RETENTION FORM.

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READ INSTRUCTIONS CAREFULLY-

MIXING,
HANDLING AND PHYSICAL PROPERTIES
VARY.

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skipped

CEMENTS (8)

 BIOCOMPATIBILITY
 RETENTION
 MECHANICAL PROPERTIES-withstand occlusal 
forces, high tensile strength
 MARGINAL SEAL
 LOW FILM THICKNESS
 EASE OF USE
 RADIOPACITY
 AESTHETICS

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FIRST CEMENT APPEARING IN DENTAL LITERATURE

ZINC

PHOSPHATE

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IS THE STANDARD WHICH OTHER CEMENTS ARE ASSESSED (GOLD STANDARD).

ZINC

PHOSPHATE

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ZINC 
PHOSPHATE advantage (4)

THIN FILM THICKNESS AND PROVEN RELIABLITY.
 LOW SOLUBILITY WHICH RESISTS BREAKDOWN IN THE MOUTH
 LOW THERMO-CONDUCTIVITY. PROVIDES LESS SENSITIVITY TO HOT AND COLD
 LONG SHELF LIFE

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ZINC 
PHOSPHATE disadvantage (6)

INITIAL LOW pH-can lead to pulpal irritation
 NO CHEMICAL ADHESION/BOND
 NO ANTIBACTERIAL PROPERTIES
 POOR ESTHETICS ( for all porcelain )
 LONG SETTING TIME: 2.5-8 MINS.
 EXOTHERMIC

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EXOTHERMIC

-chilled glass slab when mixing, small amounts of powder added to liquid.

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— TYPES OF ZOE, WHICH DIFFER IN THEIR

PROPERTIES AND USES.

TWO

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TYPE I-

is less strong and is used for temporary

restorations and for temporary cementation.

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TYPE II-

is reinforced and is stronger. It is
referred to as an intermediate restorative. It
can last for 6-12 months in the mouth. Used for
a tooth that cannot be restored immediately

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BENEFIT OF ZOE IS –

NEUTRAL pH. IT HAS A
SEDATIVE OR SOOTHING EFFECT ON THE DENTAL
PULP. A PROTECTIVE OR INSULATING BASE OR
LINER IS NOT REQUIRED.

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ZINC OXIDE 
EUGENOL (ZOE)-
CEMENT
NOT USED UNDER COMPOSITE OR ACRYLIC 
RESTORATIONS BECAUSE (2)

EUGENOL IS
INCOMPATIBLE WITH THESE MATERIALS AND ALSO
RETARDS THEIR SETTING PROCESS.

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THE TYPE AND
INTENDED USE OF THE
MATERIAL DETERMINE
WHETHER

THE POWER 
IS INCORPORATED INTO 
THE LIQUID IN 
INCREMENTS OR ALL AT 
ONCE.

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THE MIXING TIME IS

USUALLY

30-60

SECONDS.

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SETTING TIME IS

APPROXIMATELY

3-5

MINUTES

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DEVELOPED IN 1968 TO CIRCUMVENT PULPAL

PROBLEMS ASSOCIATED WITH LOW Ph.

ZINC

POLYCARBOXYLATE

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FIRST CEMENTING SYSTEM TO OBTAIN AN
ADHESIVE AGENT THAT BONDED TO ENAMEL &
DENTIN.

ZINC

POLYCARBOXYLATE

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ZINC
POLYCARBOXYLATE
action

antibacterial

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ZINC
POLYCARBOXYLATE
working time

shorter: 2-5 min

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ZINC
POLYCARBOXYLATE
mixing

NEEDS TO BE MIXED QUICKLY (30-40 sec).

POLYCARBOXYLATE

powder incorporated in

large quanitties

POLYCARBOXYLATE

fragility

not as fragile as zinc phosphate

POLYCARBOXYLATE CAN HAVE POOR ---DUE TO FILM THICKNESS

MARGINAL SEALING

POLYCARBOXYLATE SOMETIMES DOESN’T SUPPORT --- STRESS AS WELL AS NEWER CEMENTS

OCCLUSAL

POLYCARBOXYLATE | WILL BOND TO MOST ALLOYS BUT NOT TO ---

GOLD

POLYCARBOXYLATE DUE TO ITS POTENTIAL FOR PLASTIC DEFORMATION IT IS MUCH MORE DIFFICULT TO

REMOVE EXCESS CEMENT

POLYCARBOXYLATE ALTHOUGH BONDS WELL TO --- ITS USE HAS LESSENED OVER THE YEARS

ENAMEL/DENTIN

DURELON-

ZINC POLYCARBOXYLATE

USED WORLDWIDE 1972 EXCEPT US-1977. | KNOWN AS AN ACID-BASE CEMENT.

GLASS IONOMER

PART OF THE SUCCESS OF GLASS IONOMER CEMENTS IS THEIR PERFORMANCE IS GOOD EVEN IF

THEY HAVE NOT BEEN PROPERLY MIXED.

GLASS IONOMER | thickness

very thin film thickness

GLASS IONOMER | moisture tolerance and solubility

extremely moisture tolerate | fairly soluble

GLASS IONOMER ONE OF THE IMPORTANT ADVANTAGES.

 FLUORIDE RELEASE- IT CAN BE SUSTAINED FOR LONG PERIODS OF TIME.

GLASS IONOMER | FLUORIDE-INITIAL RAPID RELEASE FOLLOWED BY

A SUSTAINED,LOWER LEVEL DIFFUSSION | RELEASE.

GLASS IONOMER FLUORIDE RELEASE INCREASES IN --- CONDITIONS AND WILL --- THE pH (BUFFERING).

ACIDIC | INCREASE

GLASS IONOMER HELPS PROTECT THE TOOTH/MARGINS FROM FURTHER

TOOTH DECAY.

GLASS IONOMER | radiograph

radioopaque

GLASS IONOMER MULTI-USES- (3) CONTAINS SILVER PARTICLES FOR

LINER, LUTING AGENT, BUILD-UP MATERIAL( Ketac-Silver, Miracle Mix). strength

EARLY 1990’S- TO OVERCOME THE HIGH | SOLUBILITY OF GLASS IONOMERS.

CEMENTS-RESIN- MODIFIED GLASS IONOMERS

CEMENTS-RESIN- MODIFIED GLASS IONOMERS ADDED

HYDROPHILLIC METHYACRYLATE | MONOMERS.

CEMENTS-RESIN- MODIFIED GLASS IONOMERS what kind of cememnt

acid-base

CEMENTS-RESIN- MODIFIED GLASS IONOMERS adv and disadv

ALL THE SAME BENEFITS/ADVANTAGES OF GLASS IONOMER CEMENTS. DISADVANTAGES-LOW EARLY STRENGTH AND MOISTURE SENSITIVITY DURING SETTING.

CEMENTS-RESIN- MODIFIED GLASS IONOMERS usually takes -- hrs for the final set

GLASS IONOMERS IN GENERAL WORKING TIME CAN AFFECT FILM THICKNESS-

LONGER WORKING TIMES ALLOW MORE FLOW | AND WILL AID IN SEATING THE RESTORATION.

GLASS IONOMERS IN GENERAL ONCE THE MATERIAL BEGINS TO SET, THE (2)

VISCOSITY RISES RAPIDLY & FLOW BECOMES | IMPOSSIBLE.

GLASS IONOMERS IN GENERAL  EXTREMELY IMPORTANT THAT MIXING AND PLACEMENT OF THE CEMENT IS COMPLETED WITHIN

2-2.5 MINUTES

CEMENTS-PROVISIONAL/TEMPORARY | KEY ROLE IS

KEEPING THE TEMPORARY RESTORATION ON THE TOOTH WHILE THE PATIENT IS WAITING FOR THE FINAL RESTORATION TO RETURN FORM THE LAB.

CEMENTS-PROVISIONAL/TEMPORARY NEEDS TO BE EASILY REMOVED FROM PREPARED TOOTH WITHOUT HARMING (3)

PERIODONTIUM,TOOTH PREPARATION, OR PULP.

CEMENTS-PROVISIONAL/TEMPORARY | MOST HAVE

EUGENOL (ZOE)-although eugenol can have a negative effect on acrylic resins and composite resin cements.

CEMENTS-PROVISIONAL/TEMPORARY | THE EUGENOL PROVIDES

ANTIBACTERIAL EFFECT

TEMP (3)

-BOND, ULTRA-TEMP, RELYX TEMP

CEMENTS- PORVISIONAL/TEMPORARY When selecting (4)

 HOW LONG  HOW RETENTIVE  WHAT WILL PERMANENT CEMENT BE  WORKING IN AESTHETIC ZONE