Impression &Impression Materials in Implant Dentistry

DR MANSOUR RISMANCHIANAssociated professor,Department of prosthodontics and Implant ,Dental school.Isfahan university of medical

sciences

Type of Impression Fixture Level Abutment Level

Type of Impression • open Tray • Close Tray

Type of Impression -Custom Tray {one step, Two step} -Stock Tray {one step,two step}

Impression Materials setting

riversible

irriversible

Polymerization(curing)

Addition curing(no by product)

Condensation curing

(by product)

After setting

elastic

polysulphides Poly ethers silicones

rigide

Silicones

condensation curing

addition curing

Selection of Impression material 1.personal preference 2.easy of manipulation 3.economic 4.color 5.easy of assessment

Comparison of Impression Materials

Setting time poly sulfide>silicons>poly ether

Elasticity poly sulphide>poly ether>Additional silicons>condensational

silicons

Hardness polyether>Additionalsilicons>

condensational silicons>poly sulfide

Flow polyether>silicon>polysolfid

Tear strenght polysolfid>silicon>polyether

Dimentional stability Additionals>polyether>polysolfid>condensationals

Technique of mixing -stirring -stropping -automixer

Type of Rubber base materials 1.elastic -light body -heavy body -regular body –putty

2.rigid -heavy

Disinfection of Impression -immersion -spray

Disinfection materials -chlorine compounds -complexphenolics -Golutaraldehyde%2 -Iodophors -Alchol phenolics

Impression with silicones

1.putty/wash

2.Double mix

THANK YOU FOR YOUR ATTENTION