2021-01-12 10:01:56 作者： 所属分类：新闻中心 阅读：0 评论：0

The neutral zone technique. • 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. 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. * The mucocompressive loads when making the impression should be within the physiological limits of the tissues to allow better adaptation and intercuspation on function. The only truly functional or physiological method of making impressions is the so called dynamic impression. The impression techniques Following are the different impression techniques that can be used for resorbed mandibular ridges: The functional impression technique. The use of selective pressure or minimally displaced impression techniques should help to overcome some of these limitations. • Understand and be able to apply the principles of impression material selection and taking. • Understand the applications of the dental surveyor. A mucocompressive impression is first made of the normal tissues with zinc oxide and eugenol using a custom tray. mucostatic technique results in a denture, which is closely adapted to the mucosa of the denture-bearing area but has poor peripheral seal. A mucocompressive impression is first made of normal tissues using 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. Pressure technique (Mucocompressive) In this technique the impression is subjected to pressure during taking, this pressures either applied by dentist finger For flabby ridge we have different techniques: conventional method: used using a spaced tray The admixed technique. Mucocompressive Technique • ADVANTAGE: Good retention during function. 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. Functional impression can be used very effectively to create stability in cases exhibiting extreme resorption. 1. Osborne described the “window” impression technique with a custom tray made with a window over the flabby tissues. 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. Osborne described a technique where two separate impression trays and impression materials are used separately to record the flabby and normal tissue. MUCOCOMPRESSIVE TECHNIQUE. Using these techniques, a mucocompressive impression is recorded for healthy tissues using zinc oxide and eugenol or regular body PVS and a custom tray. impressions, including mucostatic mucocompressive, , selective pressure func- , tional, and neutral zone impressions. 42 43. 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. Watson described the window technique where a custom tray is made with window over flabby tissue. * ZnO eugenol is mucocompressive/ mucoststic based on thickness used . Once set, a low viscosity mix of impression plaster is then painted onto the flabby tissues through the window. • The materials used for this technique include impression compound, waxes and soft liners. 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