Provisional restorations/ Labial orthodontics

CUSTOM PROVISIONAL RESTORATIVE MATERIALSCUSTOM PROVISIONAL RESTORATIVE MATERIALS

INDIAN DENTAL ACADEMY

Leader in continuing dental education www.indiandentalacademy.com

www.indiandentalacademy.com

CUSTOM PROVISIONAL RESTORATIVE MATERIALSCUSTOM PROVISIONAL RESTORATIVE MATERIALS

LCDR R. L. Gunning, DC, USN


A dental prosthesis worn for various periods of time which maintains esthetics, provides masticating surfaces and protects the hard and soft tissues prior to the delivery of the definitive prosthesis.


Provide predictable outcomeRelates functional and esthetic requirementsSatisfy biologic, mechanical, and esthetic

requirements


Pulp protectionPeriodontal healthPositional stability


DurableEasily removedDiagnostic aid


Texture, color, and translucency

Color stabilityGuide to optimum

esthetics


Convenient handlingBiocompatibilityDimensional stabilityEasily contoured and

polishedAdequate strength and

abrasive resistanceEstheticwww.indiandentalacademy.com

The transitional restoration serves as a medium of communication of many of the patient’s fears, anxieties, and deep concerns about the loss of facial appearance, “normal expression”, retention clarity of speech, and the ability to continue participation in social functions.


Diagnostic casts and wax-upMatrix fabricationTooth preparation and

provisional restoration constructionInterim stage treatment

evaluation


PolycarbonateCellulose acetateAluminumNickel-chromium


AcetateSilicone puttyAlginateBaseplate wax


Polyethyl methylacrylatePolymethyl methacrylateEpiminesBis-Acryl Composite Microfill light cured UDMA composites


AdvantagesLow curing heatExtended working timeLow cost

DisadvantagesWear resistanceEstheticsColor stabilityUnpleasant odor


SplintlineSnapTrimVita Temp plus


AdvantagesWear resistanceColor stabilityPolishabilityEstheticsLow cost

DisadvantagesHigh curing heatPolymerization shrinkage (8%)Adherence to toothWorking timeOdor


AlikeDuralayJetNeoparTabTrue Kit


AdvantagesExothermic heatMonomer contentVolumetric shrinkage

DisadvantagesDifficult to repairLow hardness

Example is Scutan


AdvantagesLow curing temperatureMinimal polymerization shrinkageHigh tensile strengthHigh surface hardnessImproved marginal fit

AdvantagesGood color stabilityMinimal odorHigh polishabilityAutomix

DisadvantagesHigh cost


Chemical curedLight cured onlyMulti-phase


LuxatempIntegrityProtemp IIProtemp Garant


Inlay/OnlayFermitIntertempMirageCrown and BridgeTriad


Iso-Temp ResinProvipont DC Isocyanate-

polyol/dimethacrylateUnifast LC Methyl methacrylate


MatrixCooling ProceduresVolume of material


Flextural Strength

0 20 40 60 80

Flextural Strength (MPa)

Jet

Protemp G

Luxatemp

Iso-Temp

Flextural strength measures materials resistance to bending and fracturing.www.indiandentalacademy.com

Volumetric Shrinkage

0 2 4 6 8

Iso-Temp

Luxatemp

Protemp G

Jet

% Volume Shrinkage

24 hours

1 hour


05000

100001500020000250003000035000

PSI

Compressive Strength

ProTempII

Jet

Snap

Integrity


0

1000

2000

3000

4000

5000

6000

PSI

Tensile Strength

ProTempII

Jet

Snap

Integrity


0

2000

4000

6000

8000

10000

12000

PSI

Transverse Strength

ProTempII

Jet

Snap

Integrity


0100200300400500600700

Kg/cm 2

Transverse Strength

Alike

Jet

Protemp

Triad

Trim

Snap

Wang RL, Moore BK, Goodacre CJ, et al. A comparison of resins for fabricating provisional fixed restorations. Int J Prosthodont 1989; 2:173-84www.indiandentalacademy.com

Temperature Change During Cure

0 5 10 15 20 25 Degrees C

Snap

Jet

ProTempII

Integrity


Wear Resistance

0 5 10 15 20

Iso-Temp

Luxatemp

Protemp G

Jet

Microns of Wear

10,000 cycles

5,000 cycles

2,500 cycles


Marginal Dicrepancy (Indirect)

0 50 100 150 200 Micrometers

Snap

Trim

Triad

Protemp

Jet

Alike


Marginal Discrepancy (Direct)

0 0.1 0.2 0.3 0.4 0.5 Millimeters

Jet

Splintline

Triad

Unifast LC

Protemp G

Provipont

Tjan AH, Castelnuovo J, Goichi S. Marginal fidelity of crowns fabricated from six prorietary provisional material. .Journal of Prosthetic Dent 1997;77:482-485www.indiandentalacademy.com

Toothbrush Abrasion Test

0 5 10 15 20 25 30 35

Volume Loss

mm3

Snap

Trim

Triad

Protemp

Jet

Alike


CUSTOM PROVISIONAL RESTORATIVE MATERIALS

CUSTOM PROVISIONAL RESTORATIVE MATERIALS


Self cures to a rubbery stage and is light cured for the final set

Contains Ethoxylated Bis-GMA and Urethane dimethacrylate resin


Bis GMA composite resin formulationCartridge dispensed3 shades: A1, A2, A3.5Precise mixing ratio every time


2 ShadesLow heat releaseEasy to dispenseNo odorDurableGood esthetics

3 shadesLow heat releaseAutomixNo odorDurableExcellent esthetics


Dual cureAutomixDifficult to finish and

polishStain resistance low


Impression of Diagnostic wax-up Matrix fabrication and shade selection Place material in matrix Air and water prevents pulp damage Removal and replacement offsets polymerization

shrinkage Trim and polish with pumice


No direct monomer exposureLess chairside time More expensiveImpression of prepared teeth

Reline prefabricated restoration


Extrinsic Characterization allows the placement of colorants and modifiers in specific areas. Lowering the value, increasing the intensity or modifying the color, placing specific details of characterization and accenting interproximal areas are a few of the applications.

Minute stain Colored Chalk Light Cured Resin


AdvantagesNonstress bearing

preparationsLow curing temperatureLow shrinkageNo mixingEase of use and repairNo cement required

DisadvantagesExpensiveRadiolucentNonpolishableLow strengthLow wear resistance


Medium and fine cuttle disks, pumice, and acrilustre developed significantly smoother surfaces on composite resins than without acrilustre.

For unfilled resins, the use of acrilustre was not significantly different.

Wang RL, Moore BK, Goodacre CJ, et al. A comparison of resins for fabricating provisional fixed restorations. Int J Prosthodont 1989; 2:173-84


Ultraviolet IrradiationElevated Water Temperature

Color Stability TestExtrinsic Stains

Wang RL, Moore BK, Goodacre CJ, et al. A comparison of resins for fabricating provisional fixed restorations. Int J Prosthodont 1989; 2:173-84


Good marginal sealLow solubilityAdequate working timeConvenient dispensing Provisional polymer

compatibilityStrong but easily removed


Noneugenol cements: Nogenol and DycalEugenol Cements: Temp-bond and IRM Light and self curing cements : Provilink


Heat processed acryl resin provisionals

Polyethlene fiber reinforcement


Provisional restorations/ Labial orthodontics

Education

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