Therefore, the design of a CD base requires a clinical decision that is dependent on the patient’s presentation. conclusion A modification of Hindels’ impression technique for restoring distal exten- The impression making of an edentulous arch is critical for the design of a CD base. Conventional mucostatic methods like employing a window tray technique, multiple relief holes, or double spacers can be employed when the flabby tissue is localized. Half of the participants in each group were provided with dentures fabricated by selective pressure impression technique (subgroup SIT), and the other half were provided with dentures fabricated by mucostatic impression technique (subgroup MIT). 1979 Nov-Dec;27(6):45-7. • 1940s first alginate impression. Complete denture fabrication in clinically compromised situations such as flabby ridges is a challenging task for the clinician. Mucostatic Impression technique. Zach GA, LaVelle WE. Impression mak-ing in total edentulism is … The results showed a statistically significant difference in tissue displacement between the casts made from the functional fluid wax technique and the single-impression technique with mercaptan rubber and … Diagnostic casts were poured in type III dental stone (Ultrastone, Kalabhai. As the name signifies Muco static means no pressure is applied On the tissues while taking Impression. Mucostatic impression technique (1938) records denture-bearing tissues in static, undisturbed form by using readily flowing material such as impression plaster. In this report, a technique is presented in which conventional impressio … It is defined as a custom made device prepared for a particular patient which is used to confine and control an impression material making an impression. were recorded with a new technique of making a mucostatic impression. Write and Denen - use for corrective wash procedures. • 1939 Trapozzano early technique using ZOE. The literature reveals that the mucostatic impression technique is one of the treatment options in this scenario. 8 This method is based on the histological anatomy of the supporting tissues. The arrow indicates the site of finger pressure over the edentulous area. The conventional method for impressions of flabby tissue uses modified trays and highly flowable materials, but mucostatic impressions are difficult to achieve due to the viscous and the elastic natures of impression materials. This article discusses the basic principles of nonpressure mucostatic and selective-pressure functional impression concepts and provides a theoretical and scientific basis for the design of a CD base. Window Tray Impression Technique(cont’d) 54. Accurate impressioning of these tissues plays a major role in ensuring a well-fitting prosthesis. Upper and lower preliminary impressions were made using irreversible hydrocolloid impression material (Zelgan Plus, Dentsply. For most materials, the dimensional change is a contraction and, providing the impression material is firmly attached to the impression tray, this produces an expansion of the impression ‘space’ and an oversized die, as illustrated in Fig. first impression stage. Dental Impression Materials This advocates the selective pressure impression technique and provides dentists with good evidence for the clinical procedure. The mobile tissue area will be recorded with a zinc oxide impression material (Krex). Pressure / mucocompressive concept. The impression techniques Following are the different impression techniques that can be used for resorbed mandibular ridges: The functional impression technique. Fig. * Mucostatic impression technique, which aims to achieve support from the other firm areas of the arch and maximizes retention. MUCOSTATIC IMPRESSION TECHNIQUE • Also known as minimal pressure impressions. Mucostatic impression records the soft tissues in their resting state, thus no or minimal pressure is applied during impression taking. region to facilitate the mucostatic impression technique. In the present paper, we propose a simplified modification of the Hindels’ impression technique without jeopardizing its functionality. a b Fig 5a: … Effect of mucostatic and selective pressure impression techniques on residual ridge resorption in individuals with different bone mineral densities: A prospective clinical pilot study. The material, once in place, can be left in the mouth for 5 – 10 minutes or until the patient is in total comfort with optimum functions, this … The method will describe a one appointment procedure delivering superior detail of both hard and soft tissues. Relating this to complete denture impression technique, we have been provided with a set of philosophies - "no pressure, minimal pressure, definite pressure and selective pressure". Gen Dent. His technique consisted of making a mucostatic impression of the edentulous ridges followed by a pick-up impression with digital compression of the first through holes prepared on the impression stock tray. Seat the impression back into the patient’s mouth. Fig. The literature reveals that the mucostatic impression technique is one of the treatment options in this scenario. • 1938 Mucostatics. Technique:. (b) Altered-cast impression for the distal-extension RPD. • 1936 Alginate-type materials patent awarded. Four basic impression philosophies proposed over years for impression making are: mucostatic, mucocompressive, minimal pressure, and selective-pressure impressions [1-4]. Pascal's law - tissues under a mucostatic impression act as a confined liquid. Materials which expand during setting result in … This technique has the advantage of ensuring a close adaptation of the denture base to the entirety of the mucosa and hence enhancing retention. Although these impressions are generally affiliated with great fit and accuracy, the denture is more likely to pivot around compressive areas such as the torus palatinus , during chewing. A mucostatic impression technique. Nonpressure technique (Passive technique, Mucostatic technique). 1. Two part impression technique or Mucostatic and mucodisplacive combination or window technique was first described by Osborne in 1964. TM). A mucostatic impression technique using irreversible hydrocolloid served as control. * Mucodisplacive impression technique, with the aim of compressing the loose flabby tissue to allow functional support from it by replicating the contour of the ridge during compression by occlusal forces. mucostatic, and, being a water-based system, readily adapts to the soft tissues. PMID: 398820 [Indexed for MEDLINE] MeSH terms. Selective pressure technique. After the face-bow transfer, the maxillary and mandibular master casts were mounted in centric relation on a (a) (a) (b) (b) (c) (c) Figure 3.: (a) Maxillary impression prepared by mucostatic impression technique.