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Colombes, France

Hauchard E.,Service dodontologie
The European journal of prosthodontics and restorative dentistry | Year: 2011

This three-dimensional finite element study compared stresses, intensities and displacements of three mandibular posterior implants restored with cemented crowns (two molars and a premolar in straight line), splinted versus non-splinted. Hundred newton occlusal loads were vertically or horizontally applied, either on one single crown or on all of them. Maximal stresses and implants displacements were higher under horizontal loading. Splinting major effects appeared under single horizontal load with a decrease in stresses (34-49%) and displacements (16-19%) of the loaded crown. Splinting seems more appropriate for implant-supported restorations submitted to frequent single horizontal or oblique loads than vertical ones.

Mauprivez C.,Service dodontologie | Mauprivez C.,University Paris Diderot | Amor M.S.,Service de Neuroradiologie | Khonsari R.H.,APHP Hopital Pitie Salpetriere | Khonsari R.H.,Paris-Sorbonne University
Journal of Oral and Maxillofacial Surgery | Year: 2015

Stafne bone cavities (SBCs) are mandibular radiolucent lesions with challenging differential diagnoses. Many radiologic methods have been proposed to visualize the presence of salivary gland tissues inside the cavities. This report describes a case of bilateral angular mandibular radiolucent cavities located below the mandibular nerve canal. Magnetic resonance (MR) imaging showed continuity between the submandibular glands and the tissue herniated into the cavities. The ductal system of the 2 submandibular glands was evaluated using MR sialography. MR sialography depicted opacification of the glandular ductal system distinct from the contents of the cavities up to its primary branches, confirming the diagnosis of SBC. MR sialography visualized the submandibular gland ducts and the presence of salivary gland tissue inside the mandibular cavities with precise topographic information. This technique does not involve cannulation or injection of contrast agents and does not expose a patient to radiation. MR sialography is a valuable addition to the common imaging procedures used in the investigation of SBCs. © 2015 American Association of Oral and Maxillofacial Surgeons.

Azaroual M.F.,Service dodontologie | Fikri M.,Service de Neuro Radiologie | Abouqal R.,Laboratoire Of Biostatistique Et Of Recherche Clinique Et Epidemiologie | Benyahya H.,Mohammed V University | Zaoui F.,Mohammed V University
International Orthodontics | Year: 2014

The masticatory muscles play an important part in determining the morphology of the facial skeleton. Skeletal typology and the characteristics of the masticatory muscles are closely linked. Several authors have studied muscle characteristics as related to facial typology. The aim of this work is to study the relationship between vertical and transverse skeletal dimensions and the dimensions (length, width and thickness) of two muscles of mastication, the masseter and the lateral pterygoid. Materials and method: Our study was based on CT-scan examinations of a sample composed of patients consulting the X-ray department of the Rabat-Sale Teaching Hospital, and for whom a CT-scan had been requested. Forty CT examinations of the skull, performed in the context of sinus explorations or presurgical work-ups in the radiology department of the Rabat-Sale Teaching Hospital, were selected for this study. The sample comprised 19 women and 21 men aged between 20 and 45, with a mean of 40.9 ± 12.8. A Siemens 32-row 64-slice spiral CTscan device was used for spiral acquisition of data around the facial bones, with the mouth closed. The study was carried out in the parenchymal window for the muscle measurements, in the axial and coronal planes. Bone measurements were performed after 3D reconstruction in VRT mode. Results: Our study showed that, for the masseter muscle, thickness is the dimension that correlates significantly with skeletal dimensions in the vertical, transverse and sagittal directions. For the lateral pterygoid muscle, length and width both present significant correlations with transverse skeletal dimensions. Analysis of these results shows that the dimensional characteristics of the masticatory muscles vary according to the vertical and transverse skeletal typology of the subjects concerned. © 2013 CEO.

Mauprivez C.,Service dodontologie | Mauprivez C.,CNRS Pathology, Imaging and Orofacial Therapies | Mauprivez C.,University Paris Diderot | Harlay P.,Service dodontologie | And 2 more authors.
British Journal of Oral and Maxillofacial Surgery | Year: 2016

Onchocerciasis is a parasitic tropical disease that often presents as multiple, superficial nodules. When it is unique and deeply situated, its clinical diagnosis is difficult. We report a case of a calcified onchocercoma that was localised to the infratemporal fossa. © 2015 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

Millet C.,Service dodontologie | Rodier P.,Service dodontologie | Farges J.-C.,Service dodontologie | Labert N.,CNRS Lyon Institute of Functional Genomics | Duprez J.-P.,Service dodontologie
Gerodontology | Year: 2012

Objectives: The aim was to present the diagnosis and treatment of a case of unilateral idiopathic gingival fibromatosis (IGF) in a geriatric patient. Background: IGF is a rare condition characterised by an enlargement of the attached and marginal gingivae with no obvious association to any causative factor. Gingival overgrowth causes inaesthetic changes and clinical symptoms such as speech disturbances, tooth movement, and occlusal problems. Materials and methods: A 65-year-old female presented localised enlargement of mandibular gingiva, malpositioning of anterior mandibular teeth, and difficulty in speech and mastication. IGF also causes numerous aesthetic and psychological problems. Treatment consisted of multiple extractions, surgical therapy, and early prosthetic rehabilitation to restore function and appearance and to prevent recurrence. Results: Excellent aesthetic result and psychological benefit were achieved, and no fibromatosis recurrence was detected after 1 year following surgery. Conclusion: Gingival resection of the tissue excess and early oral rehabilitation with removable dentures have so far greatly improved patient's quality of life. © 2011 The Gerodontology Society and John Wiley & Sons A/S.

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