Difference Between Heavy Body And Light Body Impression Material

What is viscosity control and the difference between light and heavy body materials.

Difference between heavy body and light body impression material.

Difference between stock trays and custom trays. This accelerates the setting reaction resulting in the shortest intra oral setting time among leading vps materials. 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. With heavy impression material the tray distorts distorting your impression but a lot of dentists still use these.

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. Vps impressions allow for better fitting restorations. Depending on the restoration or impression needed various viscosity vps are used. The same procedure will facilitate spreading of heavy body material on the impression tray and retain it in the tray.

Heavy body light body medium body multiple regular body. Innovative active self warming technology makes imprint 4 impression material rapidly heat up to body temperature. Depending on the restoration or impression needed various viscosity vps materials can be used. Vps viscosity can range from light body.

Set time can vary depending on viscosity and different vps brands but often ranges anywhere from 2 to 5 minutes. Iii light body impression material must reproduce a line 0 020 mm in width. Administered with a syringe to a heavy body putty for bite impressions. Impression material basics john o.

1 minute 1 minute 15 seconds 1. 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. The material allows for a range of viscosities from light body that can be administered with a syringe to heavy body and putty materials often used for bite impressions. 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.

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.