english version(pg40to78) - Pr. François Duret

F Duret and Coll. Principes de fonctionnement et applications techniques de l’empreinte optique dans l’exercice de cabinet
(traduction Anglaise)
Page 76
We are going to successively envisage the functioning of each part
before approaching the applications and exploitation technical data
linked to the use of the EO device.
The wave projection system and dental shape capture
REMINDERS AND PRINCIPLE’S HISTORY
There are several modes of tri dimensional capture of an object (Fig.
4).
♦ The first is chemical natural 1 and corresponds to our capture
with impression pastes. The data is transmitted in positive by a
plaster model (for example) to a laboratory technician.
♦ The second is mechanical electronical² as it uses complex
surfaces micro probes. This method is being studied, without
great success in our profession for the last 15 years in the USA.
♦ The third capture mode is opto-electronic as it uses both
ondulatory and photonic characteristics of the light and the
electro-physical possibilities of matter. We won’t hesitate to say
today that it is the only approach mode valid and promised to a
great future in the dental surgery world. We use this approach
for the last 12 years with extremely promising results.
[Fig. 4: 3 modes of measuring an object]
Les Cahiers de Prothèse (50) pp 73 – 110, 1985