For bilateral impression taking, trays are always used. We also emphasize these two techniques since they provide an opportunity to demonstrate two alternative impression taking procedures: taking impressions with and without impression trays. Consequently, the impression material of choice is left to the preference of the individual.įor purposes of this presentation, we will cover compound impression taking techniques for impression taking for both fixed bilateral and fixed unilateral appliances.
#Alginate impression making registration#
The most critical feature for an impression taking material for space maintainers is accuracy in obtaining the band registration around the tooth.Īlthough we like compound when taking impressions for space maintainers, we are fully aware that many clinicians prefer alginate because of their familiarity with this material. If you use other materials successfully and/or if your office routine is set up for other materials, by all means continue to use them. Of course, alternative materials can be used. In particular, it is accurate and stable, and you will see how these qualities make it highly suitable for taking impressions for space maintainers as we proceed through the chapter. Compound is an excellent impression material, especially for fixed appliances. We will focus on impression taking with compound. And as you know very well by now, removable space maintainers are rarely indicated and seldom used in pediatric dentistry. The two impression materials most commonly used in pediatric dentistry for space maintainers are alginate and compound.Īlginate is indicated primarily when removable appliances are being made. Once the bands have been fitted to the teeth, an impression is taken. Our purpose in this subsection is to cover impression taking techniques involved with space maintainer appliances. 1 No.Appliance Construction: Impression Taking International Journal of Dental Materials: Vol. 3 (2020): August-September 2020Ĭasting alloys: the saga of their existence and the recipe of their blend 4 (2020): November-DecemberĮvaluation of the antimicrobial activity of heat-cure denture base resin materials incorporated with silver nanoparticlesĪ bibliometric analysis of the 100 most-cited articles in dental materials journals 2 (2020): April-May 2020Įffect of silver nanoparticles incorporation on microhardness of Heat-cure denture base resins Surface modifications of dental implants: An overview 1 (2019): April-May 2019Īn overview of advances in glass ionomer cements 1 (2020): January-February 2020ĭisinfection of impression materials: A comprehensive review of disinfection methods Mineral Trioxide Aggregate: an overview of composition, properties and clinical applications
This article reviewed various recent advances in the alginate impression materials and their performance. Several modifications were made in the composition of conventional alginates to address their shortcomings. Besides, alginates do not adhere to non-perforated trays, low viscosity resulting in gag reflex in some patients, and the inability to identify the correct consistency to load.
Further, they are highly dimensionally unstable due to syneresis & imbibition. Alginates contain low-density fine filler particles, which may arise in the form of dust and inhalation these dust particles may cause respiratory problems.
Though alginate is the most commonly used impression material, it has some inherent disadvantages. Alginates possesses numerous vital properties such as hydrophilicity, ability to record finer details, elastic recovery and inexpensive makes this material widely used in dentistry. The applications of alginates include making impressions of edentulous and partially edentulous arches, duplication of casts, and for making study models. Alginate is an elastic irreversible hydrocolloid which has various applications in dentistry.
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