Deuxième fantaisie : pour le forté-piano /

Mode of access: Internet.

An English translation of the six books of Hugo Grotius on the truth of Christianity : and of the two supplementary books of Mr. Le Clerc: I. On the choice of a religious creed, etc. II. On religious indifference. With the annotations and testimonies ... To which is added a sermon preached before the University of Cambridge, on a commencement Sunday, July 2, 1809 /

Mode of access: Internet.

Le fort d'arrêt "Roupel" : une réponse au général Sarrail /

One folded map in pocket.

Influence of the primary cleft palate closure on the future need for orthognathic surgery in unilateral cleft lip and palate patients.

The aim of the study was to determine the influence of the dissection of the palate during primary surgery and the type of orthognathic surgery needed in cases of unilateral total cleft. The review concerns 58 children born with a complete unilateral cleft lip and palate and treated between 1994 and 2008 at the appropriate age for orthognathic surgery. This is a retrospective mixed-longitudinal study. Patients with syndromes or associated anomalies were excluded. All children were treated by the same orthodontist and by the same surgical team. Children are divided into 2 groups: the first group includes children who had conventional primary cleft palate repair during their first year of life, with extensive mucoperiosteal undermining. The second group includes children operated on according to the Malek surgical protocol. The soft palate is closed at the age of 3 months, and the hard palate at 6 months with minimal mucoperiosteal undermining. Lateral cephalograms at ages 9 and 16 years and surgical records were compared. The need for orthognathic surgery was more frequent in the first than in the second group (60% vs 47.8%). Concerning the type of orthognathic surgery performed, 2- or 3-piece Le Fort I or bimaxillary osteotomies were also less required in the first group. Palate surgery following the Malek procedure results in an improved and simplified craniofacial outcome. With a minimal undermining of palatal mucosa, we managed to reduce the amount of patients who required an orthognathic procedure. When this procedure was indicated, the surgical intervention was also greatly simplified.

Tratamiento nasoangiofibroma juvenil revisión sistemática de reportes de casos

El nasoangiofibroma juvenil es tumor histológicamente benigno, pero potencialmente dañino debido a su rápido crecimiento, y a su posible extensión tracraneal. Tiene tendencia a crecer y extenderse por los forámenes y fisuras naturales. Existen en el momento múltiples clasificaciones y múltiples tratamientos, el principal de ellos es el quirúrgico el cual reporta tasas de recaída hasta del 42 % (Sánchez de Guzmán, Instituto Nacional de Cancerología 2001) y mas de 55 técnicas de abordaje. Se realizaron búsquedas en las siguientes bases de datos: medline, cochrane, proquest, ovid, biblioteca virtual en salud y búsqueda manual.

Horizontal Maxillary Osteotomy Approach for Resection of Juvenile Nasopharyngeal Angiofibroma

Juvenile angiofibroma is a benign fibroangiomatous tumor of relatively rare occurrence, developing most frequently in male adolescents. It has local characteristics of aggressiveness and expansion. The treatment of choice is surgical excision. In this article, the advantages and disadvantages of the surgical technique using the Le Fort I osteotomy are described, and the literature correlated with 2 case reports.

Postsurgical stability of oropharyngeal airway changes following counter-clockwise maxillo-mandibular advancement surgery

Purpose: This study evaluated oropharyngeal airway changes and stability following surgical counter-clockwise rotation and advancement of the maxillo-mandibular complex.Methods and Patients: Fifty-six adults (48 females, 8 males), between 15 and 51 years of age, were treated with Le Fort I osteotomies and bilateral mandibular ramus sagittal split osteotomies to advance the maxillo-mandibular complex with a counter-clockwise rotation. The average postsurgical follow-up was 34 months. Each patient's lateral cephalograms were traced, digitized twice, and averaged to estimate Surgical changes (T2-T1) and Postsurgical changes (T3-T2).Results: During surgery, the occlusal plane angle decreased significantly (8.6 +/- 5.8 degrees) and the maxillo-mandibular complex advanced and rotated counter-clock-wise. The maxilla moved forward (2.4 +/- 2.7 mm) at ANS and the mandible was advanced 13.1 +/- 5.1 min at menton, 10 +/- 4.4 mm at point B, and 6.9 +/- 3.7 mm at lower incisor edge. Postsurgical hard tissue changes were not statistically significant. While the upper oropharyngeal airway decreased significantly (4.2 +/- 3.4 min) immediately after surgery, the narrowest retropalatal, lowest retropalatal airway, and the narrowest retroglossal airway measurements increased 2.9 +/- 2.7, 3.7 +/- 3.2, and 4.4 +/- 4.4 mm, respectively. Over the average 34 months Postsurgical period, upper retropalatal airway increased 3.9 +/- 3.7 mm, while narrowest retropalatal, lowest retropalatal airway, and narrowest retroglossal airway remained stable. Head posture showed flexure immediately after Surgery (4.8 +/- 5.9 degrees) and extension postsurgically (1.6 +/- 5.6 degrees).Conclusion: Maxillo-mandibular advancement with counter-clockwise rotation produces immediate increases in middle and lower oropharyngeal airway dimensions, which were constrained by changes in head posture but remain stable over the postsurgical period. The upper oropharyngeal airway space increased only on the longest follow-up. (C) 2006 American Association of Oral and Maxillofacial Surgeons.

Orthognathic Surgery in the Young Cleft Patient: Preliminary Study on Subsequent Facial Growth

Purpose: This study evaluated the long-term effects of orthognathic surgery on subsequent growth of the maxillomandibular complex in the young cleft patient. Patients and Methods: We evaluated 12 young cleft patients (9 male and 3 female patients), with a mean age of 12 years 6 months (range, 9 years 8 months to 15 years 4 months), who underwent Le Fort I osteotomies, with maxillary advancement, expansion, and/or downgrafting, by use of autogenous bone or hydroxyapatite grafts, when indicated, for maxillary stabilization. Five patients had concomitant osteotomies of the mandibular ramus. All patients had presurgical and postsurgical orthodontic treatment to control the occlusion. Radiographs taken at initial evaluation (T1) and presurgery (T2) were compared to establish the facial growth vector before surgery, whereas radiographs taken immediately postsurgery (T3) and at longest follow-up (T4) were used to determine postsurgical growth. Each patient's lateral cephalograms were traced, and 16 landmarks were identified and used to compute 11 measurements describing presurgical and postsurgical growth. Results: Before surgery, all patients had relatively normal growth. After surgery, cephalograms showed statistically significant growth changes from T3 to T4, with the maxillary depth decreasing by -3.3° ± 1.8°, Sella-nasion-point A by -3.3° ± 1.8°, and point A-nasion-point B by -3.6° ± 2.8°. The angulation of the maxillary incisors increased by 9.2° ± 11.7°. Of 12 patients, 11 showed disproportionate postsurgical jaw growth. Maxillary growth occurred predominantly in a vertical vector with no anteroposterior growth, even though most patients had shown anteroposterior growth before surgery. The distance increased in the linear measurement from nasion to gnathion by 10.3 ± 7.9 mm. Four of 5 patients operated on during the mixed dentition phase had teeth that erupted through the cleft area. A variable impairment of postoperative growth was seen with the 2 types of grafting material used. No significant difference was noted in the effect on growth in patients with unilateral clefts versus those with bilateral clefts. The presence of a pharyngeal flap was noted to adversely affect growth, whereas simultaneous mandibular surgery did not. After surgery, 11 of 12 patients tended toward a Class III end-on occlusal relation. Conclusions: Orthognathic surgery may be performed on growing cleft patients when mandated by psychological and/or functional concerns. The surgeon must be cognizant of the adverse postsurgical growth outcomes when performing orthognathic surgery on growing cleft patients with the possibility for further surgery requirements. Performing maxillary osteotomies on cleft patients would be more predictable after completion of facial growth. © 2008 American Association of Oral and Maxillofacial Surgeons.

Extraoral alar base cinch. A modification for the technique

The alar base widening is directly related to the Le Fort I osteotomy which could lead to an undesirable facial change if not adequately controlled transoperatively. Several surgical techniques to control the lateralization and widening of the nasal base have been described in the literature. The extraoral technique, first described by Shams and Motamedi in 2002 seems to make this procedure more predictable and reliable. The authors preset a modification for that technique. © 2013 Asian AOMS, ASOMP, JSOP, JSOMS, JSOM, and JAMI.

Finite element analysis of stress distribution in anchor teeth in surgically assisted rapid palatal expansion

The treatment of a transverse maxillary deficiency in skeletally mature individuals should include surgically assisted rapid palatal expansion. This study evaluated the distribution of stresses that affect the expander's anchor teeth using finite element analysis when the osteotomy is varied. Five virtual models were built and the surgically assisted rapid palatal expansion was simulated. Results showed tension on the lingual face of the teeth and alveolar bone, and compression on the buccal side of the alveolar bone. The subtotal Le Fort I osteotomy combined with intermaxillary suture osteotomy seemed to reduce the dissipation of tensions. Therefore, subtotal Le Fort I osteotomy without a step in the zygomaticomaxillary buttress, combined with intermaxillary suture osteotomy and pterygomaxillary disjunction may be the osteotomy of choice to reduce tensions on anchor teeth, which tend to move mesiobuccally (premolar) and distobuccally (molar)

A multidisciplinary approach to the functional and esthetic rehabilitation of amelogenesis imperfecta and open bite deformity: a case report

The treatment of amelogenesis imperfecta (AI) with an anterior open bite (AOB) is a challenge for the clinician and often requires a multidisciplinary team of specialists. Most often, patients suffering from these conditions are young and a good functional and esthetic long-term result must be aspired. This clinical report illustrates the orthodontic, maxillofacial, restorative, and prosthodontic rehabilitation of a 20-year-old woman with a hypoplastic form of AI and an AOB malocclusion, having received treatment for the last 6 years. It included adhesive resin composite restorations, orthodontical and maxillofacial surgery with a one-piece Le Fort I osteotomy, and a genioplasty. Subsequent prosthodontic therapy consisted of 28 all-ceramic crowns whereby a solid interdigitation, a canine guidance, and consistent and regular contacts between tooth crowns could be achieved to assure a good functional and esthetic oral situation. The tooth preparation techniques guaranteed minimally invasive treatment. The patient was affected very positively. CLINICAL SIGNIFICANCE: This article describes an interdisciplinary approach to the successful treatment of a patient with a hypoplastic form of amelogenesis imperfecta over a period of 6 years. It starts with a discussion of the conservative steps taken during adolescence and concludes with the final prosthetic rehabilitation with all-ceramic crowns after reaching adulthood.

Tooth Viability Following Distraction Osteogenesis in Patients with Maxillary Hypoplasia

Thesis (Master's)--University of Washington, 2016-06

Three dimensional study to quantify the relationship between facial hard and soft tissue movement as a result of orthognathic surgery

Introduction Prediction of soft tissue changes following orthognathic surgery has been frequently attempted in the past decades. It has gradually progressed from the classic “cut and paste” of photographs to the computer assisted 2D surgical prediction planning; and finally, comprehensive 3D surgical planning was introduced to help surgeons and patients to decide on the magnitude and direction of surgical movements as well as the type of surgery to be considered for the correction of facial dysmorphology. A wealth of experience was gained and numerous published literature is available which has augmented the knowledge of facial soft tissue behaviour and helped to improve the ability to closely simulate facial changes following orthognathic surgery. This was particularly noticed following the introduction of the three dimensional imaging into the medical research and clinical applications. Several approaches have been considered to mathematically predict soft tissue changes in three dimensions, following orthognathic surgery. The most common are the Finite element model and Mass tensor Model. These were developed into software packages which are currently used in clinical practice. In general, these methods produce an acceptable level of prediction accuracy of soft tissue changes following orthognathic surgery. Studies, however, have shown a limited prediction accuracy at specific regions of the face, in particular the areas around the lips. Aims The aim of this project is to conduct a comprehensive assessment of hard and soft tissue changes following orthognathic surgery and introduce a new method for prediction of facial soft tissue changes.   Methodology The study was carried out on the pre- and post-operative CBCT images of 100 patients who received their orthognathic surgery treatment at Glasgow dental hospital and school, Glasgow, UK. Three groups of patients were included in the analysis; patients who underwent Le Fort I maxillary advancement surgery; bilateral sagittal split mandibular advancement surgery or bimaxillary advancement surgery. A generic facial mesh was used to standardise the information obtained from individual patient’s facial image and Principal component analysis (PCA) was applied to interpolate the correlations between the skeletal surgical displacement and the resultant soft tissue changes. The identified relationship between hard tissue and soft tissue was then applied on a new set of preoperative 3D facial images and the predicted results were compared to the actual surgical changes measured from their post-operative 3D facial images. A set of validation studies was conducted. To include: • Comparison between voxel based registration and surface registration to analyse changes following orthognathic surgery. The results showed there was no statistically significant difference between the two methods. Voxel based registration, however, showed more reliability as it preserved the link between the soft tissue and skeletal structures of the face during the image registration process. Accordingly, voxel based registration was the method of choice for superimposition of the pre- and post-operative images. The result of this study was published in a refereed journal. • Direct DICOM slice landmarking; a novel technique to quantify the direction and magnitude of skeletal surgical movements. This method represents a new approach to quantify maxillary and mandibular surgical displacement in three dimensions. The technique includes measuring the distance of corresponding landmarks digitized directly on DICOM image slices in relation to three dimensional reference planes. The accuracy of the measurements was assessed against a set of “gold standard” measurements extracted from simulated model surgery. The results confirmed the accuracy of the method within 0.34mm. Therefore, the method was applied in this study. The results of this validation were published in a peer refereed journal. • The use of a generic mesh to assess soft tissue changes using stereophotogrammetry. The generic facial mesh played a major role in the soft tissue dense correspondence analysis. The conformed generic mesh represented the geometrical information of the individual’s facial mesh on which it was conformed (elastically deformed). Therefore, the accuracy of generic mesh conformation is essential to guarantee an accurate replica of the individual facial characteristics. The results showed an acceptable overall mean error of the conformation of generic mesh 1 mm. The results of this study were accepted for publication in peer refereed scientific journal. Skeletal tissue analysis was performed using the validated “Direct DICOM slices landmarking method” while soft tissue analysis was performed using Dense correspondence analysis. The analysis of soft tissue was novel and produced a comprehensive description of facial changes in response to orthognathic surgery. The results were accepted for publication in a refereed scientific Journal. The main soft tissue changes associated with Le Fort I were advancement at the midface region combined with widening of the paranasal, upper lip and nostrils. Minor changes were noticed at the tip of the nose and oral commissures. The main soft tissue changes associated with mandibular advancement surgery were advancement and downward displacement of the chin and lower lip regions, limited widening of the lower lip and slight reversion of the lower lip vermilion combined with minimal backward displacement of the upper lip were recorded. Minimal changes were observed on the oral commissures. The main soft tissue changes associated with bimaxillary advancement surgery were generalized advancement of the middle and lower thirds of the face combined with widening of the paranasal, upper lip and nostrils regions. In Le Fort I cases, the correlation between the changes of the facial soft tissue and the skeletal surgical movements was assessed using PCA. A statistical method known as ’Leave one out cross validation’ was applied on the 30 cases which had Le Fort I osteotomy surgical procedure to effectively utilize the data for the prediction algorithm. The prediction accuracy of soft tissue changes showed a mean error ranging between (0.0006mm±0.582) at the nose region to (-0.0316mm±2.1996) at the various facial regions.

Trauma de face: eventos agudos na atenção básica

Este objeto começa destacando a importância do treinamento de cirurgiões-dentistas para o atendimento inicial do trauma de face. Ressalta que, se os traumas de face se não forem reparados de maneira e no momento adequados, podem evoluir para sérias sequelas estéticas e funcionais. Orienta que o conhecimento e a realização de um simples procedimento de contenção temporária estabiliza o paciente, prepara-o para um tratamento com o especialista e permite um melhor prognóstico. Detalha questões sobre anatomia da face bem como relembra princípios gerais do tratamento das fraturas. Destaca a divisão da abordagem em três fases: pré-trauma, com os cuidados de prevenção; atendimento do traumatizado, nas primeiras horas do ocorrido, considerado como momento ideal; tratamento pós-trauma, considerado nos casos em que se passou um tempo a mais do que o indicado para o traumatizado receber o devido tratamento, o que pode provocar sequelas. Orienta sobre tipos de trauma de face, segundo sua localização e região da face afetada, explicando sobre fratura nasal, fratura alvéolo dentária, fratura de mandíbula e terço médio da face, esta classificada em Le Fort I, Le Fort II, Le Fort III, além de abordar questões sobre fratura do complexo naso-orbitoetmoidal, fratura do complexo zigomático-maxilar e fratura do arco zigo¬mático. Trata questões rela¬cionadas à avaliação inicial e às ações possíveis para estabilização do quadro clínico. Em seguida, explica proce¬dimentos subsequentes para uma investigação mais aprofundada. Orienta que, antes da avaliação física completa e da obtenção detalhada do histórico do trauma, deve-se ter atenção às lesões que exigem cuidados imediatos – perguntas quanto à existência de alergias ou doenças crônicas e uso de medicamentos devem ser questionadas antes da administração de qualquer medicamento inicial. Orienta sobre perguntas que podem facilitar a compreensão do fato causador do trauma. Ressalta que, dependendo da complexidade do quadro clínico, existem cuidados essenciais no tratamento inicial, orientando sobre contusões (equimoses e hematomas), feridas (abrasões e lacerações), dentes avulsionados e fraturas. Em relação ao atendimento sequencial e encaminhamentos, lembra que cada fratura apresenta sinal, sintoma e tratamento específicos, que devem ser conhecidos pelas equi¬pes de saúde para que possam agilizar o primeiro atendi¬mento e necessários encaminhamentos. Conclui apresentando anexos sobre opções para a prescrição medicamentosa, prevenção pelo uso de vacinas e sobre a importância do conhecimento de como medicar uma criança.

Manejo do trauma de face: eventos agudos na atenção básica

Este objeto começa destacando a importância do treinamento de cirurgiões-dentistas para o atendimento inicial do trauma de face. Ressalta que, se os traumas de face se não forem reparados de maneira e no momento adequados, podem evoluir para sérias sequelas estéticas e funcionais. Orienta que o conhecimento e a realização de um simples procedimento de contenção temporária estabiliza o paciente, prepara-o para um tratamento com o especialista e permite um melhor prognóstico. Detalha questões sobre anatomia da face bem como relembra princípios gerais do tratamento das fraturas. Destaca a divisão da abordagem em três fases: pré-trauma, com os cuidados de prevenção; atendimento do traumatizado, nas primeiras horas do ocorrido, considerado como momento ideal; tratamento pós-trauma, considerado nos casos em que se passou um tempo a mais do que o indicado para o traumatizado receber o devido tratamento, o que pode provocar sequelas. Orienta sobre tipos de trauma de face, segundo sua localização e região da face afetada, explicando sobre fratura nasal, fratura alvéolo dentária, fratura de mandíbula e terço médio da face, esta classificada em Le Fort I, Le Fort II, Le Fort III, além de abordar questões sobre fratura do complexo naso-orbitoetmoidal, fratura do complexo zigomático-maxilar e fratura do arco zigo¬mático. Trata questões rela¬cionadas à avaliação inicial e às ações possíveis para estabilização do quadro clínico. Em seguida, explica proce¬dimentos subsequentes para uma investigação mais aprofundada. Orienta que, antes da avaliação física completa e da obtenção detalhada do histórico do trauma, deve-se ter atenção às lesões que exigem cuidados imediatos – perguntas quanto à existência de alergias ou doenças crônicas e uso de medicamentos devem ser questionadas antes da administração de qualquer medicamento inicial. Orienta sobre perguntas que podem facilitar a compreensão do fato causador do trauma. Ressalta que, dependendo da complexidade do quadro clínico, existem cuidados essenciais no tratamento inicial, orientando sobre contusões (equimoses e hematomas), feridas (abrasões e lacerações), dentes avulsionados e fraturas. Em relação ao atendimento sequencial e encaminhamentos, lembra que cada fratura apresenta sinal, sintoma e tratamento específicos, que devem ser conhecidos pelas equi¬pes de saúde para que possam agilizar o primeiro atendi¬mento e necessários encaminhamentos. Conclui apresentando anexos sobre opções para a prescrição medicamentosa, prevenção pelo uso de vacinas e sobre a importância do conhecimento de como medicar uma criança.