english version(pg40to78) - Pr. François Duret

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F Duret and Coll. Principes de fonctionnement et applications techniques de l’empreinte optique dans l’exercice de cabinet (traduction Anglaise) Page 89 [Fig. 19, 20, 21: Moiré effect on top first pre molar (x3)] is always possible when the calibration of the images between themselves is respected. These first two functions are of a considerable benefit in a daily use and the quality of the latter. The definition of the sulcus and its capture are such evident 21 things that it seems insulting to explain it; a simple angulation of 50°, that is to say an incidence angle of 25° enables a penetration of the rays of 2.5mm inside the gingival sulcus. However, it is evident that the eviction would be desirable and would facilitate the work greatly. The light ray won’t be traumatising for the epithelial attachment cells (Fig. 23 and 24)… We will get back later to the advantages in time and precision of the method. Les Cahiers de Prothèse (50) pp 73 – 110, 1985
F Duret and Coll. Principes de fonctionnement et applications techniques de l’empreinte optique dans l’exercice de cabinet (traduction Anglaise) Page 90 [Fig. 23: minimal incidence angle in tooth’s sulcus: D horizontal to the plan 1 slightly retracted gum 2 retracted gum Fig. 24: View of Moiré effect in superior canine sulcus] Creation of the working model REMINDER AND PRINCIPLE’S HISTORY The conception of the wax model, that is to say the creation of the prosthesis is an intellectual and manual action. It is intellectual in the sense that the person who realises the piece uses data coming from reflection and education. It is manual if this action supposes the concretization of the shape. In every try of modelling with CAD/CAM, in the USA, in RDA or in Scandinavian countries, this step has never been automated. The most significant illustration of this Les Cahiers de Prothèse (50) pp 73 – 110, 1985
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english version(pg40to78) - Pr. François Duret

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