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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
Intraoral scanners are devices used in dentistry which create digital scans of the teeth and soft tissue anatomy. [1] These devices replace the use of dental putty impressions by using a light source and image sensors to record the tissues inside the mouth accurately and create a virtual alternative to traditional impression plaster models [1]
However, at times the image produced can show limited information because it is only a 2D image. Intra-oral cameras (IOCs) allow an operator to see a clear image of the inside of the mouth. Similar to the size of a dental mirror IOCs have a tiny camera that is able to detect more on the 3D surface of a tooth than a 2D x-ray image is able to show.
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
Patients need to be able to cope with dental impressions as these are required for the fabrication of the indirect restoration. Development of digital impression systems including Lava Chairside oral scanner by 3M, Sirona's CEREC and Cadent iTero System could help patients receive treatment if the contraindication is being unable to withstand ...
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.