PubMed Health⌕ Search

Biomedical subjects

Jean-Marc Garcier

Publications and source records attributed to Jean-Marc Garcier.

5 recordsLinked to original sources
PubMed2006

Dental wear study in a 14th century skull of the Sao tribe, Cameroon.

The aim of this work was to study the wear affecting the almost complete dentition of a Sao individual fossil from Cameroon prehistory (XIVth century). Occlusal surfaces of the fossil fragile pieces were plaster replicated with an original technique adapted from usual dental impression methods (silicon elastomer polymerising by addition). Axial macro-photographs of both sectional dental casts and original pieces made it possible to produce drawings of the occlusal areas on transparencies in order to superimpose the lateral hemiarch counterparts in their optimal intercuspal position. The study of interarch contacts was completed by confronting and observing the occluding position of hemiarch replicas. The occlusal analysis revealed that the wear extent was equivalent on left and right molars. Hall's occlusal wear index and Van Reenen and Reinach's classification of proximal wear allow assessment of the degree of wear extent on premolar and molar sections in relation to the side or the arch observed. The even bilateral proximal and occlusal wears observed on the different kinds of homologous teeth appeared as the main contributor to this well-balanced interarch occlusion. The mandibular incisor losses and the particular type of wear affecting lower canines led to the conclusion of the presence of a labret, a great number of which was found in the area. According to Miles' method of age assessment based on tooth wear, the pieces studied belonged to an individual between 30 and 40 years old.

Age Determination by Teeth↗
PubMed2006

Dental contribution to paleo-odontological study of interarch relations in a human fossil.

In paleo-anthropology the fragility of fossil pieces (teeth and supporting bones) reduces their possible manipulation when studying the interarch relations. Two original impression methods of the jaw pieces are proposed, both adapted from those currently practiced in odontology. The plaster replicas of the dental occlusal parts are prepared according to the manufacturing procedures used in prosthetic dental laboratories. This study led to the following observations: 1) the impression techniques used by odontologists are adapted to the moulding of fragile samples. 2) The replicas elaborated from these mouldings made easier the cast manipulation in confrontation. 3) Macrophotography is a complement to direct observation of the pieces and their replicas. 4) For paleoanthropologic purposes, such studies can be easily carried out on almost any animal or human fossils.

Cameroon↗
PubMed2005

Dental arch relations analysed in a 14th century fossil skull of the Sao tribe, Cameroon.

Dental occlusal relations are rarely reported in paleo-anthropology. The manipulation of hemi-arch replicas, as well as the superimposition of drawings on calques traced from photographs, facilitated the description of the intra- and interarch relations. The occlusal interarch confrontation and the intermolar relation were observed and assessed in the horizontal, frontal and sagittal planes. Some measurements were helpful in the functional study. On the basis of knowledge in mandible kinematics a movement envelope of the first molar displacement during mastication was proposed. The dentition studied here was highly regular. It was a fine example of balanced wear for post-canine sectors. In spite of the lower canine extrusion, due to tribal mutilation of anterior teeth and to subsequent labret wearing, the interarch relations seemed not to have been altered.

Cameroon↗
PubMed2002

[Post-traumatic secondary arteriovenous fistulae of the kidney and their embolization. Report of 3 cases].

INTRODUCTION: Non-iatrogenic post-traumatic arteriovenous fistulas of the kidney raise a diagnostic and especially therapeutic problems. The authors report their experience based on 3 cases of arteriovenous fistulas treated by selective embolization during diagnostic arteriography. MATERIALS AND METHOD: In a series of 18 patients urgently admitted to hospital for kidney trauma during 2000, 3 patients presented a secondary arteriovenous fistula diagnosed on arteriography. All patients were initially treated by surveillance in the surgical ward. The diagnosis of arteriovenous fistula was subsequently suspected following recurrence of haematuria with a moderate fall in haemoglobin in two cases, and secondary appearance of lumbar pain without anaemia in the third case. For the two patients with secondary haematuria, arteriography demonstrated an arteriovenous fistula associated with an arterio-caliceal fistula. For the last patient, Doppler ultrasound suggested the diagnosis of arteriovenous fistula, which was confirmed by the arteriography. RESULTS: Selective embolization by "coils" and particle was performed during arteriography and ensured closure of the fistulas in every case. The postoperative course was uneventful for all three patients. With a mean follow-up of 7 months, no recurrence of the fistula has been observed. The remaining renal parenchyma is functional with preservation of renal function. CONCLUSION: The risk of arteriovenous fistula must be kept in mind in any case of lumbar trauma. Arteriography with selective embolization allows good control of these secondary fistulas while preserving a maximum of functional renal parenchyma, and therefore appears to be the treatment of choice of this complication.

Adult↗