In theory the mucostatic impression does just that, and with the possible exception of the treatment of the post dam ea, which, according to some, needs functnal placement, this impression theory certainly has something to offer. Dental impression is an imprint or negative likeness of the teeth and/or edentulous area and adjacent tissue. Mucostatic theory (based on Pascal's law) sets out to record the mucosa in its static (supported by underlying basal bone), undisturbed form. 3: Mucostatic impression of the edentulous areas. Impression compound; ii) Mucostatic e.g. Fig. DISADVANTAGES; 1. Mucostatic impression records the soft tissues in their resting state, thus no or minimal pressure is applied during impression taking. e.g. Zoe impression paste, polysulfide; iii) Vigorous mixing. ABSTRACT: Impression is basically an interaction between tissues and impression material. Impression plaster; V) Based on the manipulation. Minimal- pressure/ Mucostatic theory. Impression compound – wet kneading, putty consistency Elastomers; ii) Circular motion (with glass slab & spatula) eg. e.g. Various theories are: Definite-Pressure/ Muco-compressive theory. Selective- pressure theory The theories actually describe the amount of pressure required to record an impression that improves the accuracy & functions related to denture during different stages of the evolution of impression techniques. This is possible only if the impression material is watery and virtually requires no pressure to place it against tissues. Such an impression will not cover enough from. Fig. This is possible only if the impression material is watery and virtually requires no pressure to place it against tissues. i) Kneading. ... Concept of mucostatic was introduced The mucostatic impression of the soft tissue areas, already taken, is inserted in the mouth (Fig. This technique has the advantage of ensuring a close adaptation of the denture base to the entirety of the mucosa and hence enhancing retention. e.g. Mucostatic theory (based on Pascalís law) sets out to record the mucosa in its static (supported by underlying basal bone), undisturbed form. 5). 4: Metallic stock tray chosen to cover the whole arch.The arrow indicates the site of finger pressure over the edentulous area. A) Hand mixing. The impression is made with oversized or spaced trays with no border seal or border refining and very fluid impression material Impression of a tissue in a resting state prevents it from undesirable forces all over the day. Review of literature was done by Zinner and Sherman in1981 assuming that any important technique/theory of impression making published in dental journal is eventually published in a textbook.3 Analysis of history on complete denture impression making can be done era wise i.e. Non-Pressure (Mucostatic) This theory uses the passive position of oral mucus membranes. The variety of impression materials and the range of working characteristics of these materials, make possible the development of impression procedures best suited for specific conditions. Complete denture impression is a negative registration of the entire denture bearing, stabilizing and border seal areas of either the maxilla or To achieve this the impression of the arch should be made without any pressure exerting on it Minimal- pressure/ Mucostatic theory. 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