{"id":1094,"date":"2019-07-19T10:07:19","date_gmt":"2019-07-19T08:07:19","guid":{"rendered":"https:\/\/magazine.zhermack.com\/laboratory-en\/resine-e-siliconi-da-duplicazione\/"},"modified":"2024-06-10T14:38:08","modified_gmt":"2024-06-10T12:38:08","slug":"impression-resins-and-silicones","status":"publish","type":"post","link":"https:\/\/magazine.zhermack.com\/en\/laboratory-en\/impression-resins-and-silicones\/","title":{"rendered":"Impression resins and silicones"},"content":{"rendered":"\n<p>Addition silicones are the most precise\nmaterials used for the duplication of models in the dental laboratory. They are\nused for casting in the same way as gels (reversible hydrocolloids), but differ\nin that their hardening is non-reversible, therefore they cannot therefore be\nre-used.<\/p>\n\n\n\n<p>Due to their precision, they are\u00a0<strong>used mainly for applications requiring a particularly detailed copy<\/strong>, such as in the creation of auro galvan crowns (produced using electrodeposited gold and therefore extremely thin) or Maryland-type bridges, and are just one of many new <strong>metal-free products<\/strong> offering new treatment options to clinicians. The <strong><a href=\"https:\/\/www.zhermack.com\/en\/product_category\/dental\/dental-practice\/impression-systems\/precision-impression\/addition-silicones\/\" title=\"\">addition silicones<\/a><\/strong> used for duplication purposes are different to those commonly used as impression materials, being available in masses for mixing at a ratio of 1:1.<\/p>\n\n\n\n<p>With regards to duplication work, the clinician\nis no longer limited to the reproduction of master models in plaster; indeed\nthe range of resinous materials available is suited to a much wider range of\napplications, including <strong>model creation and duplication<\/strong>. The availability\nof high-precision resins allows the creation of sawcut models, for use in the\napplications described previously, or models for implant prosthetics or\northodontics.<\/p>\n\n\n\n<p>These <strong>products are very similar to\nplaster<\/strong>,&nbsp;also in terms of their appearance, allowing them to be used\nin both analogue and the new digital systems.<\/p>\n\n\n\n<p>The use of acrylic-type resins therefore\nallows the dentist to broaden his or her sphere of work, bringing certain tasks\nout of the traditional laboratory environment and in to the dental chair.<\/p>\n\n\n\n<p>The&nbsp;<strong>MDP technique for the duplication\nof complete dentures<\/strong> is of particular interest, using a self-centring and\nself-aligning flask.<\/p>\n\n\n\n<p>The prosthesis is placed with the toothed\nsurface downwards in the lower part of the flask containing the impression\nmaterial, usually a normal alginate, which is allowed to harden. The process is\nthen repeated with the counter mould, which aligns itself precisely with the\nbase.<\/p>\n\n\n\n<p>The procedure takes no more than 30\nminutes, after which the prosthesis can be returned to the patient, while the\nflask is sent to the laboratory to create the duplicate. This has clear\nadvantages, both in terms of <strong>lessening patient discomfort<\/strong> and <strong>reduced\noperating times<\/strong>, and shows particular promise at a time when&nbsp;<strong>guided\nimplant surgery <\/strong>is becoming more widespread. This approach allows a\nremodelling of the occlusal parameters, and can be used to create implant\ntemplates in transparent resin, again using a total prosthesis as a starting\nmodel.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Addition silicones are the most precise materials used for the duplication of models in the dental laboratory. They are used for casting in the same way as gels (reversible hydrocolloids), but differ in that their hardening is non-reversible, therefore they cannot therefore be re-used. Due to their precision, they are\u00a0used mainly for applications requiring a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":865,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","footnotes":""},"categories":[38],"tags":[187,199,186,194],"class_list":["post-1094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laboratory-en","tag-duplicazione","tag-duplicazione-en","tag-siliconi-per-addizione","tag-siliconi-per-addizione-en"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts\/1094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/comments?post=1094"}],"version-history":[{"count":0,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/posts\/1094\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/media\/865"}],"wp:attachment":[{"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/media?parent=1094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/categories?post=1094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/magazine.zhermack.com\/en\/wp-json\/wp\/v2\/tags?post=1094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}