Maxillary reconstruction to enable implant insertion: a retrospective study of 181 patients

<p>Abstract</p> <p>Background</p> <p>The purpose of the present study was to evaluate different types of maxillary pre-prosthetic surgery using autogenous bone graft and suggest a guideline for maxillary reconstruction to place implant.</p> <p>Methods</p> <p>181 patients (125 females and 56 males), age range from 16 to 76 years old, were operated at the Maxillo-Facial Service of the Lille's 2 Universitary Hospital Center (Chairman Pr Joël Ferri). Different techniques were used, but always with autogenous bone grafting. 21 patients underwent a Lefort 1 procedure, 139 underwent sinus graft with or without vestibular onlay graft and 21 underwent onlay graft. This surgical procedure was made to allow the insertion of 685 implants.</p> <p>Results</p> <p>The patients were evaluated by clinical and radiological assessment. In the cases of Lefort 1, the rate of successful osteointegration was higher when the implants were placed in the second part of a two stages procedure: 92%, against 81% for one stage. In cases of sinus lift procedure, the rate of implant success was 98%. The infection rate was 3.5%. There was no significant resorption and the type of prosthesis used was a denture retained by a bar or fixed bridge. In cases of onlay graft, the implant insertion success was 97% and there was no infection. The amount of resorption was more significant in the pre-maxilla than in the other areas and the type of prosthesis used was fixed dentures.</p> <p>Conclusion</p> <p>These observations demonstrate that: the aetiology of the bone defect indicate the type and number of the surgical procedures to re-established good jaws relationship and give the bone conditions to implant insertion successful.</p> <p>Clinical Relevance</p> <p>A guideline for surgical decision in the maxillary reconstruction for oral rehabilitation by implants may help to prevent failures of osseous resorption disorders and to foresee the investment of the bone in quality and necessary quantity.</p

Temporomandibular joint dysfunction and orthognathic surgery: a retrospective study

<p>Abstract</p> <p>Background</p> <p>Relations between maxillo-mandibular deformities and TMJ disorders have been the object of different studies in medical literature and there are various opinions concerning the alteration of TMJ dysfunction after orthognathic surgery. The purpose of the present study was to evaluate TMJ disorders changes before and after orthognathic surgery, and to assess the risk of creating new TMJ symptoms on asymptomatic patients.</p> <p>Methods</p> <p>A questionnaire was sent to 176 patients operated at the Maxillo-Facial Service of the Lille's 2 Universitary Hospital Center (Chairman Pr Joël Ferri) from 01.01.2006 to 01.01.2008. 57 patients (35 females and 22 males), age range from 16 to 65 years old, filled the questionnaire. The prevalence and the results on pain, sounds, clicking, joint locking, limited mouth opening, and tenseness were evaluated comparing different subgroups of patients.</p> <p>Results</p> <p>TMJ symptoms were significantly reduced after treatment for patients with pre-operative symptoms. The overall subjective treatment outcome was: improvement for 80.0% of patients, no change for 16.4% of patients, and an increase of symptoms for 3.6% of them. Thus, most patients were very satisfied with the results. However the appearance of new onset of TMJ symptoms is common. There was no statistical difference in the prevalence of preoperative TMJ symptoms and on postoperative results in class II compared to class III patients.</p> <p>Conclusions</p> <p>These observations demonstrate that: there is a high prevalence of TMJ disorders in dysgnathic patients; most of patients with preoperative TMJ signs and symptoms can improve TMJ dysfunction and pain levels can be reduced by orthognathic treatment; a percentage of dysgnathic patients who were preoperatively asymptomatic can develop TMJ disorders after surgery but this risk is low.</p

La consultation à motif unique : enquête d'opinion auprès des médecins généralistes du Vaucluse

Introduction : le vaste champ de compétences du médecin généraliste associé à un contexte incitant les patients à multiplier leurs demandes ont amené certains praticiens à restreindre leur consultation à un motif unique. Objectif principal : mesurer au sein d'un échantillon représentatif d’une population la proportion de médecins généralistes se limitant au traitement d’un seul motif par consultation. Objectifs secondaires : estimer le nombre moyen de motifs traités par consultation et déterminer les facteurs pouvant l’influencer, mesurer la proportion de médecins généralistes aspirant à mettre en place une consultation à motif unique et celle imaginant sa mise en pratique possible dans leur quotidien.Méthode : étude quantitative descriptive par enquête d’opinion réalisée du 03/02 au 16/03/2023.Résultats : huit médecins sur 72 (11,1%) se sont fixés comme limite un seul motif par consultation. Le nombre moyen de motifs traités par consultation est de 2,7 (écart type +/- 0,69). La quantité de motifs traités est plus importante chez les médecins suivant une patientèle plus modeste (p=0,015). Une durée de consultation plus longue est associée à un plus grand nombre de motifs traités (p=0,0269). Le recours à un secrétariat en présentiel favorise le traitement d’un nombre de motifs plus important (p=0,0433). Parmi les médecins interrogés la consultation à motif unique représente un idéal pour 40% d’entre eux et 24% imaginent sa mise en pratique au quotidien. Conclusion : on observe une diffusion limitée de l’usage d’une consultation à motif unique en Vaucluse, territoire où le médecin généraliste traite en moyenne 2,7 motifs par consultation. Plusieurs facteurs paraissent corrélés à la quantité de motifs traités en consultation. Ces déterminants semblent être pris en considération chez les jeunes médecins. La réalisation d’un travail qualitatif pour préciser les freins et motivations des médecins cherchant à établir une consultation à motif unique pourrait être complémentaire de cette étude quantitative

Chirurgie orthognathique et dysfonction de l'articulation temporo-mandibulaire (étude rétrospective à propos de 57 cas)

LILLE2-BU Santé-Recherche (593502101) / SudocSudocFranceF

Devonian sea level fluctuations on northern Gondwana

1 p

Mineralogical Mapping with Accurately Corrected Shortwave Infrared Hyperspectral Data Acquired Obliquely from UAVs

While uncrewed aerial vehicles are routinely used as platforms for hyperspectral sensors, their application is mostly confined to nadir imaging orientations. Oblique hyperspectral imaging has been impeded by the absence of robust registration and correction protocols, which are essential to extract accurate information. These corrections are especially important for detecting the typically small spectral features produced by minerals, and for infrared data acquired using pushbroom sensors. The complex movements of unstable platforms (such as UAVs) require rigorous geometric and radiometric corrections, especially in the rugged terrain often encountered for geological applications. In this contribution we propose a novel correction methodology, and associated toolbox, dedicated to the accurate production of hyperspectral data acquired by UAVs, without any restriction concerning view angles or target geometry. We make these codes freely available to the community, and thus hope to trigger an increasing usage of hyperspectral data in Earth sciences, and demonstrate them with the production of, to our knowledge, the first fully corrected oblique SWIR drone-survey. This covers a vertical cliff in the Dolomites (Italy), and allowed us to distinguish distinct calcitic and dolomitic carbonate units, map the qualitative abundance of clay/mica minerals, and thus characterise seismic scale facies architecture

Mineralogical Mapping with Accurately Corrected Shortwave Infrared Hyperspectral Data Acquired Obliquely from UAVs

While uncrewed aerial vehicles are routinely used as platforms for hyperspectral sensors, their application is mostly confined to nadir imaging orientations. Oblique hyperspectral imaging has been impeded by the absence of robust registration and correction protocols, which are essential to extract accurate information. These corrections are especially important for detecting the typically small spectral features produced by minerals, and for infrared data acquired using pushbroom sensors. The complex movements of unstable platforms (such as UAVs) require rigorous geometric and radiometric corrections, especially in the rugged terrain often encountered for geological applications. In this contribution we propose a novel correction methodology, and associated toolbox, dedicated to the accurate production of hyperspectral data acquired by UAVs, without any restriction concerning view angles or target geometry. We make these codes freely available to the community, and thus hope to trigger an increasing usage of hyperspectral data in Earth sciences, and demonstrate them with the production of, to our knowledge, the first fully corrected oblique SWIR drone-survey. This covers a vertical cliff in the Dolomites (Italy), and allowed us to distinguish distinct calcitic and dolomitic carbonate units, map the qualitative abundance of clay/mica minerals, and thus characterise seismic scale facies architecture