What is dual impression technique?
Dual or double arch impression taking is a common technique in dentistry. It uses a special “dual arch” tray to produce an impression of both arches when the patient closes his mouth to maximum intercuspidation [1].
What is selective pressure 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.
What is Mucostatic impression?
Mucostatic means that the impression is taken with the mucosa in its normal resting position. These impressions will generally lead to a denture which has a good fit during rest, but during chewing, the denture will tend to pivot around incompressible areas (e.g. torus palatinus) and dig into compressible areas.
What is functional impression technique?
Functional impression taking is one of the most important clinical stages in fabrication of complete dentures and overdentures. It records the denture-bearing area of the denture base, registers mucosal resiliency and shows functional margins of the denture.
What is flabby Ridge?
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.
Who gave selective pressure technique?
Heartwell mentions two techniques for achieving selective pressure for maxillary impressions. In the first technique he makes the primary impression with impression compound with a non perforated stock tray, the borders are refined, later space is provided in selected areas by scraping of the impression compound.
What are elastomeric impression materials?
Elastomeric Impression Materials. Elastomers comprise a group of synthetic polymer-based impression materials that are chemically cross-linked when set and that can be stretched and yet rapidly recover to their original dimensions, like vulcanized natural rubber when the applied stress is released.
What is tissue stop?
A tissue stop can be made in the patient’s mouth or in the laboratory with green stick modeling compound before tooth preparation (Fig. 3) . Fig. 3Tissue stop created on tray’s distal border. The distal stop orients the tray and it contains and maintains the thickness of the impression material (Fig.
What is the plastering technique?
Plastering Technique. Applying plaster DIY The correct plastering technique is essential – with only the trowel being used to apply and finish the skim coat. Is the combination of firm pressure combined with the correct angle of your trowel (how far the leading edge is from the wall)
When should plaster be applied to walls?
Plaster must be applied when a surface feels tacky, but not too wet, to help it bond to the surface well. 18. When plastering a room, try not to do two walls that are touching each other as you risk damaging one wall while plastering the other.
Is plastering difficult to learn?
This plastering technique is crucial to learn so go as slowly as you need to so as to maintain good technique at all times. With the correct technique your speed will then increase very quickly. Plaster has its own timetable!
How do you get a good plaster finish?
A good plaster finish can be achieved with a combination of confident firm pressure and the correct angle of your trowel. 24. Don’t try and get your surface perfect in the first coat – it takes too much time and the plaster may dry too soon – imperfections can be ironed out in later stages. 25.