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 95 [Fig. 31: Example of the reduction of a prosthetic piece: the inlay (reduction value: 20%)] THE OCCLUSAL MOVEMENTS (Fig. 32) An articulator is a device built following certain mathematical approximations and having for function to reproduce with more or less exactitude the movement of the patients’ mouths 25.28 . This device is for doing just a model of the [Fig. 32: diagram showing the occlusion study] 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 96 occlusal surface and so it is necessary to enter, as an occlusal relief determination factor, the mandibular movements. From this point of view, the optical impression turns out to be the possible recording of the total mandibular movements or of the principals, such as the adaptable articulator, but without articulator 13 (Fig. 33). [Fig. 33: Three mandibular movements: the Posselt occlusion in position 2, opening of 15° and lateral movement of 15°] All you need to do is use three placemark points at the superior maxillary and three placemark point at the mandibule, whilst considering that the first ones are fixed and the second are mobile. If, with the help of an opto electronic process such as a more specialised CCD camera, we follow the cinematic of the three mandibular placemarks with regards to the static maxillary ones, we can note: - on the one hand, the trajectory of the inferior incisive point and thus have a help for differential diagnosis between the normal occlusion and the pathological occlusion. - on the other hand, collect all the data necessary to the establishment of a true individualised occlusal program, that is to say for each patient. Les Cahiers de Prothèse (50) pp 73 – 110, 1985
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english version(pg40to78) - Pr. François Duret

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