Mucocompressive Technique • The type of the sub mucosa & the relation of the supporting bone to the denture bases show best to record the soft tissues. 44. * The mucocompressive loads when making the impression should be within the physiological limits of the tissues to allow better adaptation and intercuspation on function. 1. First, is the mucocompressive impression technique, which Prosthetic Procedures records the loose flabby tissue in a compressed form For every patient preliminary impression of in a try to obtain functional support for the denture. Osborne described the “window” impression technique with a custom tray made with a window over the flabby tissues. • The materials used for this technique include impression compound, waxes and soft liners. Osborne described a technique where two separate impression trays and impression materials are used separately to record the flabby and normal tissue. A mucocompressive impression is first made of normal tissues using Using these techniques, a mucocompressive impression is recorded for healthy tissues using zinc oxide and eugenol or regular body PVS and a custom tray. • Understand and be able to apply the principles of impression material selection and taking. The admixed technique. The use of selective pressure or minimally displaced impression techniques should help to overcome some of these limitations. Pressure technique (Mucocompressive) In this technique the impression is subjected to pressure during taking, this pressures either applied by dentist finger Functional impression can be used very effectively to create stability in cases exhibiting extreme resorption. In this technique the basal seat and borders are obtained with the use of impression materials that continue to flow over an extended period of time such as tissue conditioning materials or wax. MUCOCOMPRESSIVE TECHNIQUE. 42 43. Watson described the window technique where a custom tray is made with window over flabby tissue. • Understand the applications of the dental surveyor. impressions, including mucostatic mucocompressive, , selective pressure func- , tional, and neutral zone impressions. Following the setting of the impression material, the flabby tissues are painted using with a low viscosity mix of impression material (impression plaster) through the open window. Mucocompressive Technique • ADVANTAGE: Good retention during function. Once set, a low viscosity mix of impression plaster is then painted onto the flabby tissues through the window. A mucocompressive impression is first made of the normal tissues with zinc oxide and eugenol using a custom tray. • Understand and be able to apply the principles and techniques needed for the diagnosis, planning and treatment involved in removable prosthesis construction, including implant retention. * ZnO eugenol is mucocompressive/ mucoststic based on thickness used . For flabby ridge we have different techniques: conventional method: used using a spaced tray mucostatic technique results in a denture, which is closely adapted to the mucosa of the denture-bearing area but has poor peripheral seal. The only truly functional or physiological method of making impressions is the so called dynamic impression. Standard mucocompressive impression techniques are likely to result in an unretentive and unstable denture as the denture constructed on a model of the flabby tissue in a distorted state. 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