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Biomedical subjects

J Dahan

Publications and source records attributed to J Dahan.

At least 37 records · Page 2Linked to original sources
PubMed1980

[Oral stereognosis of the dysgnathic child, thumbsuckers and nonsuckers].

Stereognosy is the capacity of the oral cavity to ascertain the form of things and depends upon a complicated neurosensory and neuromotor process of the brain. The hypothesis exists that a deficiency in this perception is a consequence of thumbsucking. A study of 40 children with two comparative groups, thumbsuckers and non-suckers does not allow to refute this theory and permits to suppose that the existing deficiency may be removed by a learning process or repeated stimulation.

Analysis of Variance↗
PubMed1979

The functional compensation: an interceptive procedure in the mixed dentition.

Functional compensation, like the morphologic one which accompanies it, is to be encountered naturally in each system or organ. It facilitates the performance of the required activities in spite of the defectiveness of one or more of their biocomponents. If the pathologic forms of compensation or simply their perturbing effects are noticed early enough, deleterious and irreversible effects on growth and development of the orofacial zone may be avoided. Instead of simply supervising dental evolution or limiting intervention to early procedures (extractions) until the time for corrective treatment, we propose functional interception. Inducing a therapeutic compensation by removable appliances, this therapy aims to modify the equilibrium of displaying forces and to favor a more physiologic alveolar and sutural growth. The proposed appliances are able to intervene in the postural and dynamic position of the mobile organs in the oral cavity. They compensate their action; that is, they correct, complete, or replace it. The bimaxillary appliance is called bioactivator "biprax". Based simultaneously on the principles of the activator and bionator, it exploits a normal display of the two praxisms-speech and deglutition. Being worn day and night, it is able to guide efficiently the evolution of dental, alveolar, and even basal relationships. Its interceptive use does not interfere in any way with the onset of a corrective treatment in the adult dentition.

Activator Appliances↗
PubMed1975

[Threedimensional cephalometric contribution to the study of mandibulo-facial dysplasias].

The cephalometric particulars of the dysplastic syndrome of the first visceral segment, the dysostosis mandibulofacialis Franceschetti-Zwahlen were investigated. Ten patients were found with the identical symptom of a typical, uni- or bilateral microtia of the external ear. The cephalometric characteristics of the syndrome may be summarized as follows: - retroposition of the middle face - retroposition of maxilla and mandible - retrorotation of the mandible - reduction of vertical and lateral dimension of the face - reduction of transverse diameter of both dental arches - shortened mandibular base - both halves of the face are affected, but more so the half with microtia - the chin is deflected toward the affected side. Most of these symptoms must be attributed to disturbed organogenesis. With the rest of them, functional adaptation cannot be exluded.

Adolescent↗