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2. Dental impression - Wikipedia

   en.wikipedia.org/wiki/Dental_impression

   As the impression material is very similar to the casting material to be used, it requires the incorporation of a separating medium (e.g. sodium alginate) to aid in separating the cast from the impression. If a special tray is to be used, impression plaster requires 1–1.5mm spacing for adequate thickness. Advantages: [2] Hydrophilic

3. Digital dentistry - Wikipedia

   en.wikipedia.org/wiki/Digital_dentistry

   Conventional dental impressions are made by placing an impression material loaded on an impression tray over the dental arches. As it sets a negative imprint of the soft and hard tissues in the mouth.

4. Dental material - Wikipedia

   en.wikipedia.org/wiki/Dental_material

   Dental impressions are negative imprints of teeth and oral soft tissues from which a positive representation can be cast. They are used in prosthodontics (to make dentures), orthodontics, restorative dentistry, dental implantology and oral and maxillofacial surgery. [3]: 136–137

5. AOL Mail

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6. Inlays and onlays - Wikipedia

   en.wikipedia.org/wiki/Inlays_and_onlays

   Structure of dental inlays and onlays In dentistry, inlays and onlays are used to fill cavities, [ 1 ] and then cemented in place in the tooth . This is an alternative to a direct restoration , made out of composite, amalgam or glass ionomer , that is built up within the mouth.

7. Charles Stent - Wikipedia

   en.wikipedia.org/wiki/Charles_Stent

   Charles Stent (1807–1885) was a 19th-century English dentist notable for his advances in the field of denture making.. In 1847, English dentist Edwin Truman (1819–1905) introduced gutta-percha as a material for making dental impressions; however, this was unsatisfactory for several reasons, including its tendency to distort upon removal from the patient's mouth, and to shrink upon cooling.