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Dr. Barbara .LVSpO\L

associateprofessor

DENTALCEMENTS

Semmelweis University Faculty of Dentistry

Department of Prosthodontics

Dental Cements

Definition:

A material that acts as an adhesive to hold together the casting to the tooth structure. Luting agents are designed to be either permanent or temporary. Inlay is an indirect restoration consisting of a solid substance (as gold, porcelain or a cured composite resin) fitted to a cavity in a tooth and cemented into place. Onlay is the same as an inlay, except that it extends to replace a cusp.

DENTALCEMENTS: CROWN

RESTORE/COVERALLSURFACEOF THECLINICALCROWNOFTHEPREPAREDTOOTH DENTALCEMENTS: BRIDGE IS A FIXED DENTAL RESTORATION USED TO REPLACE A MISSING TOOTH BY JOINING AN ARTIFICIAL TOOTH PERMANENTLY TO

ADJACENT TEETH

Parts:

Abutment

Retainer

Pontic

DENTALCEMENTS: POST MADE OF METALORFIBERREINFORCED COMPOSITEMATERIALTHAT IS FITTEDINTO APREPARED ROOT CANAL OF A TOOTH THAT HASHAD

ENDODONTIC THERAPY

DENTALCEMENTS: VENEERS ARE COVEREDTHE LABIAL

SURFACE OF THE TOOTH. THEYAREMADE FROMEASTHETIC, TOOTH-COLORED

MATERIAL.

Classificationof cements

Cement

Glass Ionomer Cement

Resin Modified Glass Ionomer Cement

Resin Cement

Zinc Phosphate Cement

Zinc Polycarboxylate Cement

Zinc Oxide-Eugenol Cement (ZOE)

CompomerGlassionomerand composite

Indications:

9Temporarycementation

Indications:

9Cementation of cast alloy restorations

Indications:

9Cementation of cast alloy crowns and bridges

Non-Eugenol Containing Temporary Cement

Indications:

9Cementation of cast alloy crowns and bridges

DENTALCEMENTS

They are materials that set intraorally and that are commonly used to join a tooth and a restoration Dental cements are a classification of dental materials that are continually used in dentistry. The American Dental Association and the International Standards Organization (ISO) have teamed up to classify dental cements according to their properties and their intended uses in dentistry.

The classificationof dental cements:

Type I: Luting agents that include permanent and temporary cements Type I/I: Fine grain for cementation and luting ± Type I/II : Medium grain for bases, orthodontic purposes

Type II:Restorative applications

Type III: Liner or baseapplications.

PROPERTIESOF DENTALCEMENTSI.:

PHYSICAL PROPERTIES

Film thickness

Coefficientof thermalexpansion

Thermalconductivity

PROPERTIESOF DENTALCEMENTSII.:

MECHANICAL PROPERTIES

Tensilestrength

Compressivestrength

Shearstrength

Bond strength

PROPERTIESOF DENTALCEMENTSIII.:

CHEMICAL PROPERTIES

Solubilityand disintegration

Absorption

BIOLOGICAL PROPERTIES

Chemicalirritationof pulpduring setting

pH

PROPERTIESOF DENTALCEMENTSIV.:

1.Permanentcement -for the long-term cementation

2.Temporarycement -are used when the restoration

will have to be removed, temporary cement is selected for the placement of provisional restorations

PERMANENTCEMENT:

ZINCPHOSPHATECEMENT

First cement appearing in literature

Permanent cement for indirect restorations including inlays, onlays, crowns, and bridges

Orthodontic cement

High-strength base

SETTINGREACTION

‡ Mixing Time : 1.5 ±2 min

‡ SettingTime : 2.5 ±8 min

‡ ExothermicReaction

PERMANENTCEMENT:

ZINCPOLYCARBOXYLATE

First dental cement to exhibit chemical bonding to teeth. Permanent cement for crowns, bridges, inlays, and onlays

Orthodontic cementation

SETTINGAND PROPERTIES:

Mixing Time : 30 seconds ±2 min

Setting Time : 6 to 9 min

pH : rapidly rises from 3 to 6

Pulpal response : mild

Solubility = 0.6 % -more soluble than zinc phosphate

Thermal insulator -good

Adhesion properties ±mechanical & chemical (carboxyl group of tooth structure)

Colour:opaque

Anticariogenicproperties ±less as compared to GIC.

PERMANENTCEMENT:

GLASSIONOMERCEMENT (GIC)

developed in the 1970s tooth colored, anticariogenicrestorative materials combined properties of silicate cements and poly carboxylate cements

CLASSIFICATION

TypeI:Lutingcrowns, bridges, and orthodonticbrackets

TypeIIa: Estheticrestorativecements

TypeIIb:Reinforcedrestorativecements

TypeIII: Liningcements, base

PROPERTIES:

Setting Time

±Type I ²4-5 minutes

±Type II ²7 minutes

Release of fluoride

Greater pulpal reaction than ZOE cement but less than zinc phosphate cement

Modificationof GIC:

Metal-reinforcedGIC

High-viscosityGIC

Resin-modifiedGIC (hybridionomer)

CalciumaluminateGIC

Compomer

ADHESIVECEMENTS

ADHESIVES:

I. DENTALCEMENTS:

Physicalbonding

Chemicalbonding

Adhesivecement ±

micromechanicalbonding

S. Duarte, N. Sartori, A. Sadan, JH Phark: Adhesive resin cements for bonding esthetic restorations: A review

CementFilm thickness

—P

Compressive

strength (MPa)

Tensile

strength (MPa)

PHYSICALZinc phosphate

cement

25-3596-1333-5

CHEMICALGlass-ionomer11-3593-22643

Self-curing resin

cement

25-5029262

Light-curing

resin cement

5-10345-40075

Dual cement1627948MICROMECHANICAL

BONDING

ADHESIVECEMENTSI.:

ADHESIVECEMENTSII.:

<1,5 mm‡Light-curing

‡Self-curing

‡Dual-curing

TEMPORARYCEMENTS:

Used for luting and intermediate restorations because of its medicament quality and neutral pH.

Cements of low strength

To improve the strength many modification have been introduced

Twomain types:

I. Eugenolcontaining:

Formulatedasa powder-liquidortwo-pastesystem

PowderorBasePaste: zincoxideparticles

LiquidorAcceleratorPaste: eugenol

Slowbutproceedsmore rapidlyin a warm, humidenvironment

Best suited for provisional applications

Residual free eugenol interferes with the proper setting of resin-based composites or resin cements.

TEMPORARYCEMENTS

II. Non-eugenolcontaining:

Various types of carboxylic acids have been used to replace eugenol and produce a ZOE-like material.

EBA-ALUMINA MODIFIED CEMENTS

±Liquid: substitutedbyorthoethoxybenzoicacid(EBA) forpart of theeugenol liquid

±Powder: alumina

ZOE PLUS POLYMER

±Liquid: eugenol

±Powder: 20% to40%: finepolymerparticles-Zincoxideparticles kispelyi.barbara@dent.semmelweis-univ.hu

THANK YOU FOR YOUR ATTENTION!

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