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Biomedical subjects

J Treil

Publications and source records attributed to J Treil.

14 recordsLinked to original sources
PubMed2000

[3D cephalometry].

The Cepha3DT software is used to generate a 3D model of the human face.

Cephalometry↗
PubMed1999

[The architectural balance of the face: a 3D cephalometric concept].

The use of the c2000 software led us to develop a new 3D cephalometric construction, based on the selection on the axial CT Scans of 8 anatomical landmarks and of teeth, all of which were situated along the trigeminal neuro matriciel facial growth axes. The analysis of this construction is based on the use of an original mathematical tool in biology: the axes of inertia. Using the selection of both mental foramen, both infra and supra orbital foramen and the head of both malleus, the C 2000 software creates a geometrical construction called: "the maxillo-facial frame", as well as, a 3D cephalometric analysis: angles, distances, areas, volumes center of gravity and axes of inertia. Using the selection of teeth, the C 2000 software calculates the axes of inertia of each tooth or of groups of teeth. The use of the axes of inertia allow us to create of a hierarchy of anatomical levels the teeth, the half arches, the arches, both arches and the maxillo-facial frame. In addition, for each of these anatomical levels, the axes of inertia create a 3D landmark which allows the calculation of the orientation of each of these elements in relation to the others. The study of 28 orthomorphic people using this analysis revealed the existence of a maxillo-facial balance that is unique for each individual.

Adolescent↗
PubMed1997

[A new 3-dimensional cephalometry model. A new 3-dimensional parameter analysis: the axis of inertia. A new idea: maxillofacial equilibrium].

The authors propose a biomensurativ 3 D method based on the plotting of 8 anatomical landmarks situated on the trigeminal axis and the selection of teeth. In the analysis of this construction, we have employed mathematical tools unusual in developmental biology, the axis of inertia. The 3 D analysis allows to evidence the architectural, structural and functional balance of the dentomaxillofacial complex. This balance must be substituted to the normality concept to directly linked to cultural criterias and to the selection of mean parameters among culturally and ethnically homogeneous populations. Therapy does not have to lead to the normality of mean parameters but to the return or to the discovery of a real balance.

Cephalometry↗
PubMed1991

[Cerebral venous angiomas. 12 personal cases and review of the literature].

Cerebral venous angiomas (CVAs) are made up of veins with abnormal structure: thick walls, lumens dilated of irregular calibre that converge radially towards a wide draining vein. The arteries are normal. The veins are separated by a normal nervous tissue. The malformation is thought to develop as a compensatory venous drainage consecutive to the occlusion, or lack of development, of one or several transcerebral veins during the formation of the mature venous system. Together with arteriovenous angiomas, capillary telangiectasias and cavernous angiomas, CVAs belong to the vascular angiomatous malformations, also called hamartomas. The present study is based on 12 cases collected between 1984 and 1989, all explored by CT and angiography, and by MRI in 2 cases. The diagnosis therefore was neuroradiological, except in 1 case where it was obtained by neuropathological examination. The malformation was supratentorial in 10 cases and cerebellar in 2 cases. Most CVAs were discovered in patients whose symptoms could hardly be attributed to these malformations and consequently were termed asymptomatic (6 cases). Two cases were found in subjects with generalized epileptic seizures without clear-cut relationship with the angioma; 4 cases were revealed by haemorrhages: subarachnoidal haemorrhage in 2 cases and supratentorial intraparenchymatous haematoma in 1 case. These 3 cases had a spontaneously favourable outcome after a follow-up of several years. One patient with a cerebellar hematoma died postoperatively of edematous infarction of the cerebellum. One of these patients had two symmetrical CVAs, one in each cerebral hemisphere (multiple venous angiomas), and in another patient the CVA was probably associated with a cavernous angioma.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1978

[Cervical myelography using metrizamide via a lateral approach at C1-C2 (author's transl)].

Metrizamide is a new hydrosoluble contrast medium of an entirely original conception which for first time makes it possible to explore the whole cord and its spaces. The technique of latero-cervical puncture between C1 and C2 was used in 45 cases of cervical cord compression, cervico-brachial neuralgia or brachial plexus paralysis. This technique of myelography has proved to be simple and reliable. It has a number of advantages: it is far more rapid, less painful and offers good visualisation of the nerve roots as compared with air myelography; unlike myelography with iodine-based oils, it is not necessary to remove the contrast medium after the examination since Metrizamide is spontaneously resorbable. Tolerance in general is remarkably good.

Adolescent↗
PubMed1978

[Embolization and balloon occlusions in craniofacial vascular lesions: seven years' experience (author's transl)].

We review 258 cases of craniofacial vascular lesion treated by endovascular occlusion in the past 7 years in the Neuroradiology Departments of Nancy, Nantes, and Toulouse. Dural fistulas very often need both embolization and surgery. Craniofacial angiomas are not straightforward indications for therapy: the age of the patient, the unpredictability of evolution, and possible sequelae have to be taken into account; embolization is very successful in counteracting hemorrhage. Angiomatoses such as Rendu-Osler disease can respond well to repeated embolizations over several years. Lesions such as hemolymphangiomas are also excellent indications for embolization, either alone or with surgery. Occlusion by detachable balloon is ideally the most elegant method, but it is not always technically feasible, nor free from complications.

Arteriovenous Fistula↗
PubMed1978

Lumbar phlebography in the diagnosis of disc herniations.

The authors report their experience with 240 cases with lumbar phlebography in the diagnosis of lumbar disc herniations. The normal radiological anatomy and the radiological signs of disc herniations are described. Indications for phlebography are given, and the reliability of this test is compared with that of myelography performed with water-soluble agents.

Humans↗
PubMed1976

Congenital spondylolysis of cervical vertebrae with spondylolisthesis anf frontal narrowing of the spinal canal. Report of two cases.

Two cases of cervical spondylolisthesis, due to a congenital defect in the pars interarticularis of C6, associated with spina bifida and elongation of the contralateral pars interarticularis, are reported. Tomography showed an abnormal direction of the articular facets of C6 and demonstrated a narrow frontal diameter of the cervical spinal canal at the level of the malformation. Gas myelography showed a slight compression of the cord. Unlike previously reported cases the patients had neurological findings which, in one case at least, were certainly referable to the spinal cord.

Adult↗