What is selective impression technique?
The selective-pressure impression technique combines aspects of both techniques, as pressure is applied to certain tissues while other areas are captured with minimal pressure. This impression philosophy is credited to Boucher5 and is based on a histologic understanding of the supporting tissues.
How do you take impressions of a flabby ridge?
A mucocompressive impression is first made of the normal tissues with zinc oxide and eugenol using a custom tray. Once set, a low viscosity mix of impression plaster is then painted onto the flabby tissues through the window. Once set, the entire impression is removed.
What is flabby tissue?
A fibrous or flabby ridge is a superficial area of mobile soft tissue affecting the maxillary or mandibular alveolar ridges. It can develop when hyperplastic soft tissue replaces the alveolar bone and is a common finding particularly in the upper anterior region of long term denture wearers.
What is primary impression and secondary impression?
The primary impression is a concise statement describing the symptom, problem, or condition that is the reason for a medical encounter. A secondary impression is a second, less severe problem with the patient, which may or may not be directly related to the primary impression.
What is impression technique?
Impression : A negative likeness or copy in reverse of the surface of an object ; an imprint of teeth and adjacent structure for use in dentistry. 3. Impression trays : A receptacle in to which suitable impression material is placed to make negative replica.
What is border molding?
The border molding technique is the shaping of the border areas of a custom impression tray by manual or functional manipulation of the tissue adjacent to the borders in order to duplicate the size and contour of the vestibule resulting in maintains of the peripheral seal during function.
What is passive impression technique?
Passive impression / Mucostatic Impression / Pressureless Impression technique records the tissues with minimal distortion and cause least possible displacement of tissues. There will be large amount of space between the tray and soft tissues and it uses very fluid type of impression material.
What is window impression in dentistry?
Watson 16 described the ‘window’ impression technique where a custom tray is made with a window or opening over the (usually anterior) flabby tissues. A mucocompressive impression is first made of the normal tissues using the custom tray and zinc oxide and eugenol. Once set, it is removed, trimmed, and re-seated in the mouth.
Is there a new technique for impressions of flabby tissues?
In this paper, the authors have proposed a newer technique of impression making of the flabby tissues using a combination of readily available newer and older materials to ensure an accurate and easy impression of these tissues. 1. Introduction
How is a mucocompressive impression made?
A mucocompressive impression is first made of the normal tissues using the custom tray and zinc oxide and eugenol. Once set, it is removed, trimmed, and re-seated in the mouth. A low viscosity mix of ‘plaster of Paris’ is then painted onto the flabby tissues through the window.
What is a complete denture impression?
4. • COMPLETE DENTURE IMPRESSION A complete denture impression is a negative registration of the entire denture bearing, stabilizing and border seal areas present in the edentulous mouth• PRELIMINARY IMPRESSION A preliminary impression is an impression made for the purpose of diagnosis or for the construction of a tray 5.