Difference Between Heavy Body And Light Body Impression Material

Elastomeric impression materials are used in a variety of dental procedures and improved delivery systems and materials with better properties have made the impression technique more predictable figure 1.

Difference between heavy body and light body impression material.

With the exception of the very high viscosity putty materials all polyvinyl siloxanes light medium and heavy body achieve this. This accelerates the setting reaction resulting in the shortest intra oral setting time among leading vps materials. Iii light body impression material must reproduce a line 0 020 mm in width. Advantages over comes the polymerization shrinkage of the light body material margins duplicated in light body disadvantages use of custom tray an assistant required for mixing the material tray syringe simultaneously margins duplicated in heavy body in case of excess pressure.

Essentially a stress thinning material becomes less viscous when stressed as during injection and then recovers its viscosity when it rests on the tissue or or in the tray. 1 minute 1 minute 15 seconds 1. Heavy body light body medium body multiple regular body. Depending on the restoration or impression needed various viscosity vps are used.

Difference between stock trays and custom trays. Innovative active self warming technology makes imprint 4 impression material rapidly heat up to body temperature. Impression materials are used to obtain an accurate replica of hard and soft oral tissues. Vps impressions allow for better fitting restorations.

Depending on the restoration or impression needed various viscosity vps materials can be used. Impression material basics john o. What is viscosity control and the difference between light and heavy body materials. The same procedure will facilitate spreading of heavy body material on the impression tray and retain it in the tray.

Administered with a syringe to a heavy body putty for bite impressions. This phenomenon is called shear thinning chapter 3. Very low viscosity materials can reproduce lines 1 2 µm wide 5 12 13 it should be noted that the literature does not tend. A two step impression is when an impression is taken twice the first time with heavy medium body then when that material is set the second step is to add light body over the vps putty for another impression.

With heavy impression material the tray distorts distorting your impression but a lot of dentists still use these. Vps viscosity can range from light body.