Service dodontologie

Hôpital-Camfrout, France

Service dodontologie

Hôpital-Camfrout, France

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PubMed | CNRS Pathology, Imaging and Orofacial Therapies and Service dOdontologie
Type: | Journal: Journal of dental research | Year: 2016

X-linked hypophosphatemia (XLH) is a rare genetic skeletal disease where increased phosphate wasting in the kidney leads to hypophosphatemia and prevents normal mineralization of bone and dentin. Here, we examined the periodontal status of 34 adults with XLH and separated them according to the treatment they received for hypophosphatemia. We observed that periodontitis frequency and severity were increased in adults with XLH and that the severity varied according to the hypophosphatemia treatment. Patients who benefited from an early and continuous vitamin D and phosphate supplementation during their childhood presented less periodontal attachment loss than patients with late or incomplete supplementation. Continued hypophosphatemia treatment during adulthood further improved the periodontal health. Extracted teeth from patients with late or incomplete supplementation showed a strong acellular cementum hypoplasia when compared with age-matched healthy controls. These results show that XLH disturbs not only bone and dentin formation but also cementum and that the constitutional defect of the attachment apparatus is associated with attachment loss.


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.


Moullan M.,Service dodontologie | Ahossi V.,Service dodontologie | Zwetyenga N.,University of Burgundy
Revue de Stomatologie, de Chirurgie Maxillo-faciale et de Chirurgie Orale | Year: 2016

Introduction: Stevens-Johnson syndrome and toxic epidermal necrolysis (SJSTEN) is a rare acute drug reaction characterized by the brutal destruction of the superficial layer of the skin and mucosa. SJSTEN is favoured by some drugs (90 % of cases) and genetic factors. It occurs at any age in both sexes. The pathophysiology is not completely understood. To our knowledge, only one case linked to an insecticide has been described. We present the second case involving a combination of lambdacyhalothrin and thiamethoxam. Observation: A 34-year-old farmer was admitted in emergency for a severe allergic reaction occurring few days after the use of an insecticide to treat his field with no particular precaution. The disease progression was swift: deterioration of general condition, generalized itching, blisters, bubbles, hyperthermia, tachycardia, significant oral pain and oral lesions and dysphagia. Hands, feet were concerned and external genitalia was responsible for burning urination. Oral lesions have rapidly evolved from edema to infected lesions. The diagnosis of SJSTEN was confirmed by histopathology. After complete assessment and adequate treatment, the patient was discharged after 17 days of hospitalization. The etiological research concluded to a probable poisoning by lambdacyhalothrin and thiamethoxam. Discussion: This is the second published case of a SJSTEN linked to an insecticide combining lambdacyhalothrin and thiamethoxam. Manufacturers, users, regulators and physicians should take these data into account. © 2016 Elsevier Masson SAS.


Introduction. Stevens-Johnson syndrome and toxic epidermal necrolysis (SJSTEN) is a rare acute drug reaction characterized by the brutal destruction of the superficial layer of the skin and mucosa. SJSTEN is favoured by some drugs (90 % of cases) and genetic factors. It occurs at any age in both sexes. The pathophy-siology is not completely understood. To our knowledge, only one case linked to an insecticide has been described. We present the second case involving a combination of lambdacyhalothrin and thiamethoxam. Observation. A 34-year-old farmer was admitted in emergency for a severe allergic reaction occurring few days after the use of an insecticide to treat his field with no particular precaution. The disease progression was swift: deterioration of general condition, generalized itching, blisters, bubbles, hyperthermia, tachycardia, significant oral pain and oral lesions and dysphagia. Hands, feet were concerned and external genitalia was responsible for burning urina-tion. Oral lesions have rapidly evolved from edema to infected lesions. The diagnosis of SJSTEN was confirmed by histopathology. After complete assessment and adequate treatment, the patient was discharged after 17 days of hospitalization. The etiological research concluded to a probable poisoning by lambdacyhalothrin and thia-methoxam. Discussion. This is the second published case of a SJSTEN linked to an insecticide combining lambdacyhalothrin and thiamethoxam. Manufacturers, users, regulators and physicians should take these data into account. © 2016 Elsevier Masson SAS.


PubMed | Service dodontologie and University of Burgundy
Type: Journal Article | Journal: Revue de stomatologie, de chirurgie maxillo-faciale et de chirurgie orale | Year: 2016

Stevens-Johnson syndrome and toxic epidermal necrolysis (SJSTEN) is a rare acute drug reaction characterized by the brutal destruction of the superficial layer of the skin and mucosa. SJSTEN is favoured by some drugs (90% of cases) and genetic factors. It occurs at any age in both sexes. The pathophysiology is not completely understood. To our knowledge, only one case linked to an insecticide has been described. We present the second case involving a combination of lambdacyhalothrin and thiamethoxam.A 34-year-old farmer was admitted in emergency for a severe allergic reaction occurring few days after the use of an insecticide to treat his field with no particular precaution. The disease progression was swift: deterioration of general condition, generalized itching, blisters, bubbles, hyperthermia, tachycardia, significant oral pain and oral lesions and dysphagia. Hands, feet were concerned and external genitalia was responsible for burning urination. Oral lesions have rapidly evolved from edema to infected lesions. The diagnosis of SJSTEN was confirmed by histopathology. After complete assessment and adequate treatment, the patient was discharged after 17 days of hospitalization. The etiological research concluded to a probable poisoning by lambdacyhalothrin and thiamethoxam.This is the second published case of a SJSTEN linked to an insecticide combining lambdacyhalothrin and thiamethoxam. Manufacturers, users, regulators and physicians should take these data into account.


PubMed | Service dodontologie, University dAuvergne and French Institute of Health and Medical Research
Type: Journal Article | Journal: Revue de stomatologie, de chirurgie maxillo-faciale et de chirurgie orale | Year: 2016

Central giant cell granuloma (CGCG) is a benign tumor that may be subdivided in a non-aggressive form and an aggressive form. In aggressive forms, tumor size and high recurrence risk need large surgical resections. In order to minimize surgical morbidity, especially in children, medical treatments acting on the tumor proliferation are currently being assessed: steroids (triamcinolone), anti-osteoclastic drugs (calcitonine, alendronate, denosumab), anti-angiogenic drugs (interferon ). However to date, there is no evidence for any superiority of medical over surgical treatment. Complete response is rarely obtained and additional surgery is often necessary to remove the tumor in case of tumor progression, to remove a remnant or to remodel bone. Moreover, these drugs have frequent local or systemic side effects such as osteonecrosis and growth deficiencies.


PubMed | Service de stomatologie et chirurgie maxillo faciale, University of Rennes 2 – Upper Brittany, Service dodontologie, Clinique dermatologique and Service de dermatologie
Type: | Journal: Annales de dermatologie et de venereologie | Year: 2016

Autoimmune bullous diseases (AIBD) may cause chronic oral lesions that progress insidiously.To provide recommendations for optimal oral-dental management of patients presenting AIBD with oral involvement.In the absence of scientific studies with high levels of proof, these recommendations have been drawn up at two meetings by a committee of experts on AIBD comprising 7 dermatologists, 1 stomatologist, 1 maxillofacial surgeon, 2 odontologists and 4 parodontologists.The oral lesions associated with AIBD may be classified into three grades of severity: severe (generalised erosive gingivitis affecting at least 30% of dental sites), moderate (localised erosive gingivitis affecting less than 30% of dental sites) and controlled (no erosive oral lesions). Good oral-dental hygiene suited to the severity of the oral lesions, must be practised continually by these patients so as to avoid the formation of dental plaque, which aggravates symptoms. Dental and parodontal care must be considered in accordance with the severity grade of the oral lesions: in severe cases, the dental plaque must be eliminated manually with a curette, but several types of care (descaling, treatment for tooth decay, non-urgent extractions, etc.) must be suspended until the grade of severity is moderate or until the disease is stabilised.


PubMed | Service dodontologie, Service danatomie pathologique et de cytologie and Center Massilien Of La Face
Type: Journal Article | Journal: Annales de dermatologie et de venereologie | Year: 2016

The aim of this study was to collect epidemiological, aetiopathogenic, clinical, histological and therapeutic data concerning proliferative verrucous leucoplakia (PVL) and to report three new cases.A literature review performed using the Medline database enabled us to collate 39 studies involving 607 cases. Three new cases were added.PVL is a rare disease characterized by extensive and multifocal oral leucoplakic lesions. Its histological pattern depends on the stage of the disease: hyperkeratosis, verrucous hyperplasia, verrucous carcinoma and squamous cell carcinoma. The aetiopathogenesis of PVL is poorly understood and there is no clear consensus concerning therapy. Malignant transformation occurs in over 50 % of cases.Diagnosis of PVL is difficult because of the presenting signs, which can be mistaken for those of other diseases. Management may be complicated and long-term follow-up is essential.


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.


PubMed | Service dOdontologie
Type: Journal Article | Journal: Caries research | Year: 2015

A survey conducted in 2002 among French general dental practitioners (GPs) showed variations between treatment decisions and a tendency towards early restorative intervention for caries. The aims of the present questionnaire survey were to investigate, among a random sample of 2,000 French GPs, the management decisions for occlusal lesions in 2012 and to compare the results to those obtained in 2002. The response rate was 41.9%. The majority of the respondents (60.7%) would postpone their restorative decisions until the lesion was in the dentin, based on clinical and radiographic examinations. Almost 68% of the respondents suggested that the cavity preparation should be limited to the lesion (vs. a preparation extending to the occlusal fissure), and 81.6% chose composite as restorative material for the earliest lesion requiring restoration in a 20-year-old patient with his/her caries risk factors under control. Statistical analysis ((2) and logistic regression) showed that the management decisions were influenced by certain demographic characteristics (gender, clinical experience and participation in cariology courses). When comparing the 2002 and 2012 responses, it appears that even if French GPs still tend to intervene surgically for occlusal lesions, which could benefit from noninvasive care such as therapeutic sealants, the restorative threshold has been delayed to later stages of carious progression (p < 0.0001). Moreover, the 2012 respondents were less likely to open the fissure system than the 2002 respondents (p = 0.032), and less amalgam restorations would have been placed in 2012 (p < 0.0001). Furthermore, the results showed that the variability observed in 2002 toward caries management decisions was persisting in 2012.

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