What is an optical impression?

What is an optical impression?

Optical impressions are an excellent alternative to classic impressions taken with the use of impression trays. We have been using optical impressions in our clinic since 2010

and used this method when performing reconstructions using CAD / CAM technology – Full ceramic bridges, crowns, inlays, onlays and crowns on implants.

In this article we describe different types of impressions

Prosthetic impressions

Taking dental impressions has long been associated with all kinds of dental dental reconstructions.

What are impressions in dentistry?

They are used to precisely “copy” the surface of the mucosa and teeth. A plaster model is made on the basis of the impression, which mirrors teeth, alveolar processes and mucosa with details.

The model can be used to design and perform planned prosthetic reconstruction, e.g. crowns, bridges and dentures.

Classic impressions

Over the years, various methods of taking impressions have been used, and for many years they have been taken with the use of impression materials.

Classic prosthetic impressions have not lost their importance even now. Technologies for the production of impression materials dedicated to various types of prosthetic work are developing.

However, taking a good impression is always associated with discomfort for the patient and is sometimes impossible to due to the strong gag reflex of the patient.

The doctor taking the impression must also demonstrate the ability to effectively and precisely reproduce the shape of the oral cavity.

Optical impression

is a common name

The technically correct name is: a spatial scan.

The basis for the application and development of CAD / CAM technology for dentistry was the design and implementation of an intraoral scanner.

The technology was developed at the University of Zurich.

Its pioneer was Sirona Gmbh (now Dentsplay Sirona), which in 1980 introduced the CEREC technology ( Chair-side Economical Restoration of Esthetic Ceramics)

Intraoral scanner CEREC is a tool for the doctor which takes many photos in a short time and then puts them into one image on the computer screen.

The dentist can see all the necessary detail and, if necessary, improve the preparation of the teeth

The prosthetic model, so far cast by the technician, is now generated digitally by a computer program on the screen.

Based on this image, you can design many prosthetic reconstructions both in a dentist’s office as well as by sending this image by e-mail to a distant dental laboratory.

This saves a lot of time. It became possible to make a crown or a bridge in one visit!