{"id":3052,"date":"2026-02-26T21:33:25","date_gmt":"2026-02-26T21:33:25","guid":{"rendered":"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/"},"modified":"2026-02-26T21:33:25","modified_gmt":"2026-02-26T21:33:25","slug":"preliminary-impression-definition-uses-and-clinical-overview","status":"publish","type":"post","link":"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/","title":{"rendered":"preliminary impression: Definition, Uses, and Clinical Overview"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Overview of preliminary impression(What it is)<\/h2>\n\n\n\n<p>A preliminary impression is an initial mold of the teeth, gums, and oral tissues.<br\/>\nIt creates a basic replica of the mouth that can be poured into a model (cast).<br\/>\nIt is commonly used early in treatment planning for dentures, crowns\/bridges, orthodontics, and other dental appliances.<br\/>\nIt is usually less detailed than a final impression, but it is designed to be accurate enough for diagnosis and early fabrication steps.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why preliminary impression used (Purpose \/ benefits)<\/h2>\n\n\n\n<p>The main purpose of a preliminary impression is to capture the overall shape and relationships of the dental arches (upper and lower jaws) and surrounding soft tissues. This gives the dental team a starting point for planning, communicating, and preparing more precise steps later.<\/p>\n\n\n\n<p>In everyday terms, it solves the \u201cwe need a reliable map\u201d problem. Before a dentist or lab can design a denture, custom tray, night guard, orthodontic appliance, or other device, they often need a working model of your mouth. A preliminary impression provides that model efficiently.<\/p>\n\n\n\n<p>While many dental materials are used to treat tooth problems directly (for example, filling small cavities, sealing grooves, or repairing chipped edges), a preliminary impression is different: it is primarily a <strong>recording<\/strong> procedure rather than a <strong>repair<\/strong> procedure. It does not \u201cseal\u201d teeth or rebuild tooth structure; it helps the dental team plan and fabricate items that may later support chewing function, fit, aesthetics, or comfort.<\/p>\n\n\n\n<p>Common benefits include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Establishing a baseline record of oral anatomy for planning and documentation  <\/li>\n<li>Producing a diagnostic cast that can be measured, marked, and discussed  <\/li>\n<li>Helping create a custom impression tray for a more detailed final impression  <\/li>\n<li>Allowing preliminary evaluation of spacing, occlusion (bite), and tooth positions  <\/li>\n<li>Supporting lab communication (design notes can be made on the cast)  <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Indications (When dentists use it)<\/h2>\n\n\n\n<p>Dentists and prosthodontic teams may take a preliminary impression in situations such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Planning for complete dentures (fully edentulous patients)  <\/li>\n<li>Planning for partial dentures (missing some teeth)  <\/li>\n<li>Creating a custom tray before a final impression for crowns, bridges, or dentures  <\/li>\n<li>Diagnostic models for orthodontic assessment and appliance planning  <\/li>\n<li>Study models for treatment planning discussions and recordkeeping  <\/li>\n<li>Preliminary assessment before extensive restorative work (multiple teeth)  <\/li>\n<li>Fabrication planning for mouthguards or occlusal splints (varies by clinician and case)  <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Contraindications \/ when it\u2019s NOT ideal<\/h2>\n\n\n\n<p>A preliminary impression is not always the most suitable approach, or it may need modification. Situations where it may be limited include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When very high detail is required immediately (a final impression or intraoral scan may be preferred)  <\/li>\n<li>Uncontrolled gag reflex that prevents tray placement (technique and material choice may need adjustment)  <\/li>\n<li>Active oral bleeding that contaminates the impression surface and reduces accuracy  <\/li>\n<li>Significant tooth mobility where tray removal could be uncomfortable or distort tissues (varies by clinician and case)  <\/li>\n<li>Severe undercuts (areas where the tray\/material can lock in), increasing risk of tearing or difficult removal  <\/li>\n<li>Known or suspected sensitivity\/allergy to specific impression materials (material selection matters)  <\/li>\n<li>When an intraoral digital impression (scan) is indicated and available for the intended purpose (varies by clinic workflow and case)  <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How it works (Material \/ properties)<\/h2>\n\n\n\n<p>A preliminary impression depends on an <strong>impression material<\/strong> that is placed in a tray, seated in the mouth, and allowed to set into a flexible or semi-rigid mold. The material\u2019s handling and accuracy are influenced by its chemistry and physical properties.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Flow and viscosity<\/h3>\n\n\n\n<p>Impression materials come in different consistencies (thickness). For preliminary impression procedures, clinicians often choose a material that can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flow enough to adapt around teeth and soft tissues  <\/li>\n<li>Be viscous enough to stay in the tray without slumping excessively  <\/li>\n<li>Set into a stable form that can be removed without major distortion  <\/li>\n<\/ul>\n\n\n\n<p>Examples include alginate (irreversible hydrocolloid) and impression compound (often used in some edentulous preliminary impressions). Viscosity selection varies by clinician and case.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Filler content<\/h3>\n\n\n\n<p>\u201cFiller content\u201d is commonly discussed with resin composites (filling materials), but it can also be relevant to impression materials because many contain fillers that influence:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Consistency and body (how thick it feels)  <\/li>\n<li>Tear resistance (how well it resists ripping during removal)  <\/li>\n<li>Dimensional stability (how well it holds its shape after setting)  <\/li>\n<\/ul>\n\n\n\n<p>That said, the low-vs-high filler language used for restorative composites does not translate cleanly to impression materials. For preliminary impression materials, clinicians more often discuss <strong>mix viscosity, working time, set time, dust-free handling, and tear strength<\/strong> rather than filler percentage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Strength and wear resistance<\/h3>\n\n\n\n<p>Wear resistance is a key concept for restorations that stay in the mouth (like fillings), but a preliminary impression is removed after it sets. So \u201cwear resistance\u201d is not a primary requirement.<\/p>\n\n\n\n<p>The closest relevant properties for a preliminary impression are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tear strength:<\/strong> resistance to tearing at thin margins (important around the gumline or interproximal areas)  <\/li>\n<li><strong>Elastic recovery:<\/strong> ability to rebound after deformation during removal  <\/li>\n<li><strong>Dimensional stability:<\/strong> how well it maintains accuracy until it is poured into a cast (varies by material and manufacturer)  <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">preliminary impression Procedure overview (How it\u2019s applied)<\/h2>\n\n\n\n<p>Workflows vary, but a general preliminary impression sequence can be understood using common clinical \u201cstep labels.\u201d Some of the labels below (etch\/bond, cure, finish\/polish) are typically associated with tooth-colored filling procedures; for a preliminary impression, they translate to analogous steps (surface preparation, setting, and model finishing).<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\n<p><strong>Isolation<\/strong><br\/>\n   The mouth is kept as dry and controlled as practical. Cheeks and tongue are retracted as needed, and the tray is tried in for size and comfort.<\/p>\n<\/li>\n<li>\n<p><strong>Etch\/bond<\/strong><br\/>\n   This step <strong>does not usually apply<\/strong> to a preliminary impression because impression materials do not bond to enamel the way restorative composites do. The closest parallel is <strong>preparing the tray and tissues<\/strong>, such as using a suitable tray adhesive when indicated (more common with elastomeric materials) and ensuring the tray fits without impinging tissues.<\/p>\n<\/li>\n<li>\n<p><strong>Place<\/strong><br\/>\n   The impression material is mixed (or dispensed) and loaded into the tray. The tray is then seated in the mouth with steady pressure to capture teeth and soft tissue contours.<\/p>\n<\/li>\n<li>\n<p><strong>Cure<\/strong><br\/>\n   Impression materials typically <strong>set<\/strong> rather than light-cure. The clinician holds the tray stable while the material reaches its set. Set time varies by material and manufacturer.<\/p>\n<\/li>\n<li>\n<p><strong>Finish\/polish<\/strong><br\/>\n   In impression-making, \u201cfinish\/polish\u201d most closely relates to <strong>post-removal handling<\/strong>: the impression is rinsed, disinfected according to clinic protocol, inspected for completeness, and then used to pour a stone model (cast). The cast may be trimmed and refined in the lab for diagnostic or fabrication steps.<\/p>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Types \/ variations of preliminary impression<\/h2>\n\n\n\n<p>\u201cPreliminary impression\u201d refers more to the <strong>stage and purpose<\/strong> than to one single material. Common variations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\n<p><strong>Alginate (irreversible hydrocolloid) preliminary impression<\/strong><br\/>\n  Often used for diagnostic casts and many denture preliminary impressions. It is valued for convenience and patient tolerance in many settings. Dimensional stability and pouring timing can vary by material and manufacturer.<\/p>\n<\/li>\n<li>\n<p><strong>Impression compound preliminary impression (often edentulous)<\/strong><br\/>\n  A thermoplastic material that softens when heated and firms when cooled. It may be used to capture broad tissue form in some complete denture preliminary impressions, particularly where a more rigid preliminary material is desired (varies by clinician and case).<\/p>\n<\/li>\n<li>\n<p><strong>Elastomeric preliminary impressions (PVS\/polyether in some workflows)<\/strong><br\/>\n  Some clinics may use elastomeric materials earlier in the process, especially if they want better tear strength and detail than alginate, or if the impression will be poured later (varies by material and manufacturer).<\/p>\n<\/li>\n<li>\n<p><strong>Stock tray vs custom tray approach<\/strong><br\/>\n  Preliminary impressions are commonly taken in <strong>stock trays<\/strong> to create a cast. That cast may then be used to fabricate a <strong>custom tray<\/strong> for a final impression with more controlled thickness and detail.<\/p>\n<\/li>\n<li>\n<p><strong>Consistency variations (tray material vs syringe\/light body)<\/strong><br\/>\n  Some impression systems use a heavier body in the tray and a lighter body around teeth. This \u201cinjectable\u201d concept is common in elastomeric final impressions. It may be used in some preliminary steps, but it is more typical for high-detail impressions.<\/p>\n<\/li>\n<li>\n<p><strong>Clarifying what it is not: low vs high filler, bulk-fill flowable, injectable composites<\/strong><br\/>\n  These terms usually describe <strong>restorative resin composites<\/strong> (materials used to fill cavities), not impression materials. A preliminary impression is a negative mold; it is not a filling and does not stay in the tooth.<\/p>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Pros and cons<\/h2>\n\n\n\n<p>Pros:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Provides a practical starting model for diagnosis and treatment planning  <\/li>\n<li>Helps communicate tooth position, spacing, and arch form to the dental lab  <\/li>\n<li>Often relatively quick to perform in a standard dental visit workflow  <\/li>\n<li>Can support fabrication of a custom tray for a more accurate final impression  <\/li>\n<li>Typically non-invasive (no drilling; no permanent change to teeth)  <\/li>\n<li>Useful for records and baseline documentation  <\/li>\n<\/ul>\n\n\n\n<p>Cons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Usually less detailed and less controlled than a final impression  <\/li>\n<li>Accuracy can be affected by saliva, movement, tray fit, and material handling  <\/li>\n<li>Some materials can tear in thin areas or distort during removal (varies by material)  <\/li>\n<li>Patient comfort can be challenging for some people (gag reflex, mouth opening limits)  <\/li>\n<li>Timing matters: some materials should be poured into a cast sooner than others (varies by material and manufacturer)  <\/li>\n<li>May need to be repeated if bubbles, voids, or missing anatomy are present  <\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Aftercare &amp; longevity<\/h2>\n\n\n\n<p>A preliminary impression itself is a temporary record and is not meant to \u201clast\u201d in the mouth. Longevity is usually discussed in terms of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>How long the impression remains accurate before it is poured<\/strong> into a stone cast (varies by material and manufacturer)  <\/li>\n<li><strong>How long the stone cast remains usable<\/strong> for planning or fabrication steps (depends on storage, handling, and whether teeth shift over time)  <\/li>\n<\/ul>\n\n\n\n<p>General factors that influence whether impressions and models remain useful include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Changes in bite and tooth position over time (natural movement, dental work, tooth loss)  <\/li>\n<li>Oral habits such as clenching or bruxism (which can change wear patterns and tooth position)  <\/li>\n<li>Hygiene and gum health status (swelling or recession can change soft tissue contours)  <\/li>\n<li>Whether the cast is used for a short-term planning step or longer-term appliance fabrication  <\/li>\n<li>Regular checkups that update records as needed (timing varies by clinician and case)  <\/li>\n<\/ul>\n\n\n\n<p>If a device is made from older models, fit can sometimes be affected if the mouth has changed since the preliminary impression was taken.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Alternatives \/ comparisons<\/h2>\n\n\n\n<p>Different recording methods and materials may be used depending on the goal (diagnostic models vs final restorations vs temporary repairs). High-level comparisons can help clarify where preliminary impression fits.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\n<p><strong>preliminary impression vs final impression<\/strong><br\/>\n  A preliminary impression is typically an initial, broad-accuracy record used for study models or to make a custom tray. A final impression is usually more detail-oriented and technique-sensitive, intended for definitive fabrication steps where precision is critical.<\/p>\n<\/li>\n<li>\n<p><strong>preliminary impression vs intraoral digital scan<\/strong><br\/>\n  Digital scans can capture teeth and bite relationships without trays and setting materials, depending on equipment and indications. However, scanning very mobile soft tissues (like edentulous ridges) can be more challenging in some cases, and clinician preference and workflow vary.<\/p>\n<\/li>\n<li>\n<p><strong>Flowable vs packable composite (restorative comparison)<\/strong><br\/>\n  These are filling materials used to repair teeth, not to record anatomy. Flowable composite is designed to flow and adapt in small areas; packable composite is stiffer for building contact points and anatomy. They are not substitutes for a preliminary impression, but patients sometimes confuse these categories because both involve \u201cmaterials placed in the mouth.\u201d<\/p>\n<\/li>\n<li>\n<p><strong>Glass ionomer (restorative comparison)<\/strong><br\/>\n  Glass ionomer is used as a restorative or liner\/base in certain situations and can chemically interact with tooth structure. It does not function as an impression material and is not used to create casts.<\/p>\n<\/li>\n<li>\n<p><strong>Compomer (restorative comparison)<\/strong><br\/>\n  Compomers are tooth-colored restorative materials with properties that overlap composite and glass ionomer categories. Like composites and glass ionomers, compomers are not used for preliminary impressions.<\/p>\n<\/li>\n<\/ul>\n\n\n\n<p>The key distinction: a preliminary impression is about <strong>capturing shape<\/strong> for models and appliances, while composites, glass ionomers, and compomers are about <strong>repairing tooth structure<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common questions (FAQ) of preliminary impression<\/h2>\n\n\n\n<p><strong>Q: Is a preliminary impression painful?<\/strong><br\/>\nMost people describe it as pressure rather than pain. The tray and material can feel bulky, and some patients feel temporary discomfort if tissues are sensitive. If you have a strong gag reflex, the experience can be unpleasant even without pain.<\/p>\n\n\n\n<p><strong>Q: How long does a preliminary impression take?<\/strong><br\/>\nThe active \u201ctray-in-mouth\u201d time is typically short, but the full process includes tray selection, mixing\/dispensing, seating, setting, and inspection. Total timing varies by material and manufacturer and by clinic workflow.<\/p>\n\n\n\n<p><strong>Q: What materials are used for a preliminary impression?<\/strong><br\/>\nAlginate is commonly used for many preliminary impression procedures, and impression compound may be used in some edentulous cases. Some clinics may use elastomeric materials depending on the purpose and desired handling characteristics. Selection varies by clinician and case.<\/p>\n\n\n\n<p><strong>Q: How accurate is a preliminary impression compared with a final impression?<\/strong><br\/>\nA preliminary impression is generally intended for diagnostic casts or to create a custom tray, so it may not capture the same fine detail as a final impression. Accuracy depends on tray fit, material properties, and technique. For many planning tasks, the preliminary impression is sufficiently accurate.<\/p>\n\n\n\n<p><strong>Q: Can I eat or drink right after a preliminary impression?<\/strong><br\/>\nBecause the impression is removed at the end of the procedure, there is usually no material left in place that needs \u201csetting time\u201d afterward. Some people prefer to rinse to remove residual taste or small bits of material. Any specific post-visit instructions vary by clinician and case.<\/p>\n\n\n\n<p><strong>Q: Why did my dentist need this if they are also doing a scan or another impression later?<\/strong><br\/>\nA preliminary impression can be used to create a cast for planning, to fabricate a custom tray, or to establish baseline records. A scan or final impression may be reserved for later steps requiring higher precision. Using more than one method can be part of a staged workflow.<\/p>\n\n\n\n<p><strong>Q: Does a preliminary impression affect my teeth or fillings?<\/strong><br\/>\nA preliminary impression is generally non-invasive and does not involve drilling. In some situations, impression material can catch on sharp edges or undercuts, which is why tray selection and technique matter. If you have concerns about loose restorations, discuss them with your clinician.<\/p>\n\n\n\n<p><strong>Q: What about safety\u2014are impression materials safe?<\/strong><br\/>\nDental impression materials are commonly used in clinical practice and are formulated for intraoral use. As with many dental materials, sensitivity or allergy is possible in rare cases, and gagging or aspiration risk is managed through positioning and technique. Material choice and precautions vary by clinician and case.<\/p>\n\n\n\n<p><strong>Q: What determines the cost of a preliminary impression?<\/strong><br\/>\nCost depends on the clinic\u2019s workflow, the material used, whether models are poured and trimmed, and how the impression fits into a larger treatment plan. Fees also vary by region and practice setting. For pricing specifics, clinics typically provide estimates as part of the overall plan.<\/p>\n\n\n\n<p><strong>Q: How long will the results \u201clast\u201d?<\/strong><br\/>\nThe impression itself is a temporary record, and its usefulness depends on how soon it is poured and how stable it remains (varies by material and manufacturer). The stone cast may remain useful longer, but teeth and gums can change over time. If significant changes occur, updated records may be needed for accurate fabrication.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A preliminary impression is an initial mold of the teeth, gums, and oral tissues. It creates a basic replica of the mouth that can be poured into a model (cast). It is commonly used early in treatment planning for dentures, crowns\/bridges, orthodontics, and other dental appliances. It is usually less detailed than a final impression, but it is designed to be accurate enough for diagnosis and early fabrication steps.<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-3052","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>preliminary impression: Definition, Uses, and Clinical Overview - Best Dental Hospitals<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"preliminary impression: Definition, Uses, and Clinical Overview - Best Dental Hospitals\" \/>\n<meta property=\"og:description\" content=\"A preliminary impression is an initial mold of the teeth, gums, and oral tissues. It creates a basic replica of the mouth that can be poured into a model (cast). It is commonly used early in treatment planning for dentures, crowns\/bridges, orthodontics, and other dental appliances. It is usually less detailed than a final impression, but it is designed to be accurate enough for diagnosis and early fabrication steps.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/\" \/>\n<meta property=\"og:site_name\" content=\"Best Dental Hospitals\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-26T21:33:25+00:00\" \/>\n<meta name=\"author\" content=\"drdental\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"drdental\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"12 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/\",\"url\":\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/\",\"name\":\"preliminary impression: Definition, Uses, and Clinical Overview - Best Dental Hospitals\",\"isPartOf\":{\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/#website\"},\"datePublished\":\"2026-02-26T21:33:25+00:00\",\"author\":{\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/#\/schema\/person\/5729031a8ff1a9a243a97107e2fa8aa0\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.bestdentalhospitals.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"preliminary impression: Definition, Uses, and Clinical Overview\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/#website\",\"url\":\"https:\/\/www.bestdentalhospitals.com\/blog\/\",\"name\":\"My blog\",\"description\":\"Connecting You to the Best Dental Care \u2013 Worldwide\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.bestdentalhospitals.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/#\/schema\/person\/5729031a8ff1a9a243a97107e2fa8aa0\",\"name\":\"drdental\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.bestdentalhospitals.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/2d2e33e0c976345379e0019cc3e40b6d7c1800f9b730970838f2b0ec2c7ec326?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/2d2e33e0c976345379e0019cc3e40b6d7c1800f9b730970838f2b0ec2c7ec326?s=96&d=mm&r=g\",\"caption\":\"drdental\"},\"url\":\"https:\/\/www.bestdentalhospitals.com\/blog\/author\/drdental\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"preliminary impression: Definition, Uses, and Clinical Overview - Best Dental Hospitals","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.bestdentalhospitals.com\/blog\/preliminary-impression-definition-uses-and-clinical-overview\/","og_locale":"en_US","og_type":"article","og_title":"preliminary impression: Definition, Uses, and Clinical Overview - Best Dental Hospitals","og_description":"A preliminary impression is an initial mold of the teeth, gums, and oral tissues. It creates a basic replica of the mouth that can be poured into a model (cast). It is commonly used early in treatment planning for dentures, crowns\/bridges, orthodontics, and other dental appliances. 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