IMPRESSION TRAY
Luca Martinelli Basics on dental impression tray Publication nr. 52 – 29th December 2014 Foreword Take the impression of the patient’s mouth is not a trivial operation. To the doctor’s office, a wrong impression may represent a loss of time, extensions of the patient stey in the chair, waste of expensive materials, misunderstanding with the dental laboratory, new dates which are a damage to the patient and to the dentist, with a tarnished image itself of the dental office. Over the years from dental impressions detected using wax, in the Seventeenth Century, we moved to the plaster and then to the gutta percha. Around 1925 we can find hydrocolloids, later alginates, curing silicons and polyether. From 1976 on we find addition silicon and many others will come. Trays have remained essentially the same from their first invention up to now. Perhaps that’s the reason why they have always been considered the “Cinderella” of manual dental devices yet they are of funda...