Fabrication of an acrylic interim denture employing two-part impression technique for distal extension bases - Kennedy class 1 with modifications

Impression procedure forms the basis of a successful Removable Partial Denture however, in distal extension bases the residual ridge must be recorded in functional form and the remaining natural teeth in an anatomic form. Zinc oxide eugenol impression paste is a material of choice for functional impression whilst irreversible hydrocolloid is suitable for an anatomic impression. Therefore two-part impression technique is a suggestive impression technique that enables the operator to make an impression utilizing two different types of impression materials loaded in two different trays, one of which is a special tray and other a stock tray, so as to control the differential support predicament