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1.
Orthod Fr ; 91(1-2): 101-114, 2020 06 01.
Artículo en Francés | MEDLINE | ID: mdl-33146125

RESUMEN

We could study Cone Beam documents of patients consulting in ORL with standard Angle Class I occlusion (45 ND), patients consulting in orthodontics with an orthodontic Class II (51 APNS) and patients with a surgical Class II (83 APS). The used 3D biometry calculates systematically a 164 set of parameters able to take into account all kinds of disharmonies; among which 38 parameters are specifically devoted to anterior-posterior "off asymmetry" pathologies. Then the specific Artificial Intelligence (AI) programs treat morphological data and give textual diagnoses. Analysis of the global sample aims to control the efficiency, separating different sub-samples one each other: t test appreciates efficiency of each parameter to recognize clinical sub-sample. The correlation coefficient, r, between each parameter and pseudo Angle molars Class II (GMMy-Gmmy) give the importance of its tie with Class II pathology. Presentation of parameters medium values in each sub-group gives the medium profiles. By direct comparison of patient's parameters values with medium profile, it is possible to locate patient's pathology. So we can take in account new parameters like arches upper/lower gap, anterior bases upper/lower gap, compensatingparameters... It is then possible to make more secure the clinical decision.


Asunto(s)
Inteligencia Artificial , Maloclusión de Angle Clase II , Biometría , Cefalometría , Humanos , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Cráneo
2.
Orthod Fr ; 91(1-2): 115-128, 2020 06 01.
Artículo en Francés | MEDLINE | ID: mdl-33146126

RESUMEN

With the conventional 2D exam of clinical cases, the diagnosis is penalized by the lack of data, not only for vertical or transverse or asymmetrical problems, but for classical cases of anteroposterior dysharmonies. In these cases, the effectively used parameter, ANB angle, seems insufficient. So the authors elaborated a 3D biometry tool. The program of morphological analysis is able to deliver a complete description of dysharmony, supported by Cone Beam data capture. In the first part of this article the authors present the foundation of the model: anatomical reference, skeletal landmarks, teeth location by inertia matrix calculus, parameters, diagnosis and aid to treatment plan. The second part is the presentation, step by step, of the program in function, analyzing a great case of Class II hyperdivergent, border line surgery. All along the diagnosis way, the authors make the assistant discover all the documents given by the computer about complete 3D diagnosis and aid to treatment plan.


Asunto(s)
Tomografía Computarizada de Haz Cónico , Maloclusión de Angle Clase II , Biometría , Cefalometría , Cara/cirugía , Humanos , Imagenología Tridimensional , Mandíbula
3.
Orthod Fr ; 91(1-2): 57-67, 2020 06 01.
Artículo en Francés | MEDLINE | ID: mdl-33146134

RESUMEN

Since 1907, the international community has used Angle's classification to assess the mesio-distal relationships of the dental arches. It is the basis of the diagnosis of malocclusion in the sagittal dimension and indicates or not an orthodontic correction treatment. This work was aimed to inventory the classification methods of malocclusions used today. Indices of treatment need were also presented because they are based on one or more occlusal anomalies to indicate treatment. The classifications were criticized and the contribution of a functional analysis based on the use of the trilogy setting, centering and guiding was detailed. The type of anomalies (skeletal and dental) must be completed by the analysis of the occlusal anomaly of setting (centering or guiding) and of the category of occlusion (functional occlusion, functional malocclusion or pathogenic malocclusion), ie its possible pathogenic impact on orofacial structures. A consensus on the classification of occlusal anomalies is necessary in order to better identify the anomalies and their global repercussions, and to better define the needs for orthodontic treatment.


Asunto(s)
Maloclusión , Oclusión Dental , Humanos , Maloclusión/diagnóstico , Maloclusión/terapia
4.
Orthod Fr ; 87(1): 77-81, 2016 Mar.
Artículo en Francés | MEDLINE | ID: mdl-27083225

RESUMEN

These interventions usually aimed at the correction of the skeletal discrepancy by mandibular retrognatism with an advancement of the distal portion of the mandible after mandibular osteotomy. The position of the condyle is determined during the osteosynthesis with miniplates. Condyles are set back in relation with the supine position of the patient and the weakness of his (her) curarized muscle. All studies show that surgery of mandibular advancement causes a lateral, torque and backward movement of the condyles, all harmful to the condyles. Factors that predispose to condylar resorption are "the patient": a woman, young (between 15 and 40), high mandibular angle, with a history of temporo-mandibular disorders and surgical overload applied to the condyles. What are the possible solutions to avoid failures? Patient preparation before surgery and surgery simulation with an articulator, condylar position control during surgery, working with surgeons to achieve a condylar portion stabilization system (with the CAD), quickly set up a mobilization of the mandible by physiotherapy.


Asunto(s)
Avance Mandibular/efectos adversos , Osteotomía Maxilar/efectos adversos , Retrognatismo/cirugía , Trastornos de la Articulación Temporomandibular/etiología , Adolescente , Adulto , Factores de Edad , Simulación por Computador , Diseño Asistido por Computadora , Articuladores Dentales , Femenino , Humanos , Masculino , Mandíbula/patología , Cóndilo Mandibular/patología , Planificación de Atención al Paciente , Modalidades de Fisioterapia , Retrognatismo/patología , Factores Sexuales , Articulación Temporomandibular/patología , Torque , Adulto Joven
5.
Orthod Fr ; 81(3): 235-44, 2010 Sep.
Artículo en Francés | MEDLINE | ID: mdl-20712979

RESUMEN

Using the Treil 14 points cephalometric model orthodontists can prepare a complete cranio-facial anatomic assessment at three analytic levels: the framework or envelope, the basal bone and the alveolo-dental arcade. The assessment of border-line surgical antero-posterior dysmorphosis can elucidate interesting depictions of asymmetries, their relation to other malformities, and their genesis. Asymmetry arises from over-growth of one side of the face in all three dimensions of space even if, clinically, it often appears that one dimension is predominately affected. The ortho-morphic cases of Angle Class I present a little right excess or "natural" asymmetry. The Class III cases present a severe excess on the right side, while the Class II cases present an excess on the left side comparing with reference sample.


Asunto(s)
Cefalometría/métodos , Asimetría Facial/diagnóstico , Imagenología Tridimensional/métodos , Maloclusión/diagnóstico , Proceso Alveolar/patología , Arco Dental/patología , Cara , Huesos Faciales/patología , Trastornos del Crecimiento/diagnóstico , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Maloclusión de Angle Clase I/diagnóstico , Maloclusión de Angle Clase II/diagnóstico , Maloclusión de Angle Clase III/diagnóstico , Desarrollo Maxilofacial , Cráneo/patología , Diente/patología
6.
Int Orthod ; 7(4): 354-69, 2009 Dec.
Artículo en Inglés, Francés | MEDLINE | ID: mdl-20303921

RESUMEN

The inter-dependence of overall orthodontic treatment and the development of the third molars requires the entire dentition to be taken into consideration ab initio and for the patient to be fully informed as to the extractions involved. The anatomical conditions in which the development of the wisdom teeth can occur are studied using comparative samples, with and without third molar retention, followed up to the age of 20 years. Posterior growth observed between the beginning of multiband treatment and adulthood amounted to 11/16mm (girls/boys). The initial difference in forecasting the space between the groups with retained third molars and without was slight (5.5mm). However, this difference was maintained throughout the growth period and was sufficient to guide the final choice whether to extract these teeth or allow them to erupt.


Asunto(s)
Desarrollo Maxilofacial , Tercer Molar/crecimiento & desarrollo , Ortodoncia Correctiva/métodos , Extracción Dental , Adolescente , Niño , Femenino , Predicción , Humanos , Consentimiento Informado , Estudios Longitudinales , Masculino , Tercer Molar/cirugía , Odontometría , Pronóstico , Adulto Joven
7.
Orthod Fr ; 79(4): 251-61, 2008 Dec.
Artículo en Francés | MEDLINE | ID: mdl-19061629

RESUMEN

The eight points cephalometric Treil model and the alveolodental parameters already allows an initial description of the maxillofacial framework and the teeth. Added six points allows taking into consideration an intermediate level: the maxillary and mandibular skeletal basis. So, the 14 points complete model allows a complete craniofacial anatomy description in three analysis levels: the framework or envelope, the osseous bases, the alveolodental arch. The correlation study between the 3D parameters at different levels defines the compensation notion. It allows understanding how skeletal disharmony may be distributed among the different levels. Only vertical direction compensations are analysed here.


Asunto(s)
Cefalometría/métodos , Huesos Faciales/patología , Imagenología Tridimensional/métodos , Maloclusión/diagnóstico , Adulto , Proceso Alveolar/patología , Mentón/patología , Arco Dental/patología , Femenino , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Masculino , Maloclusión de Angle Clase II/diagnóstico , Maloclusión de Angle Clase III/diagnóstico , Mandíbula/patología , Maxilar/patología , Cavidad Nasal/patología , Órbita/patología , Paladar (Hueso)/patología , Tomografía Computarizada por Rayos X , Diente/patología , Dimensión Vertical
8.
Orthod Fr ; 79(1): 13-30, 2008 Mar.
Artículo en Francés | MEDLINE | ID: mdl-18364213

RESUMEN

A 3D cephalometric analysis method from scanner acquisition has been developed thanks to a long collaboration between Dr Treil and the Department of Orthodontics in Toulouse III University. It allows a perfect knowledge of maxillo-facial architecture using fourteen landmarks related to the neuromatricial axis of facial growth. These landmarks can be identified without ambiguity. The marking of each tooth relative to dental arches (gravity centre coordinates and torque and tipping of each tooth), and the location of arches relative to maxillo-facial frame are given by the analysis. Description and reconstruction of dental and maxillo-facial anatomy are possible with three levels: maxillo-facial frame, maxillar and mandibular bases and dentoalveolar level. The method not only gives more precise information than conventional cephalometrics in anteroposterior and vertical directions, but it allows transversal analysis and asymmetry measurement. Applications are numerous in research as well as in clinical medicine: analyses of cases border line surgery, surgical set-up, facial asymmetry, analysis of dentoalveolar compensations, definition of therapeutic aims, occlusal analysis and set-up, study of evolution in anthropology-primatology, study of growth etc. This method of description using a pattern of landmarks is perfectly adapted to the last developments of modern research techniques: morphometric geometry with Procustes superimpositions, EDMA, TPS, FEM.


Asunto(s)
Cefalometría/métodos , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional/métodos , Proceso Alveolar/diagnóstico por imagen , Proceso Alveolar/patología , Fenómenos Biomecánicos , Arco Dental/diagnóstico por imagen , Arco Dental/patología , Investigación Dental , Asimetría Facial/clasificación , Asimetría Facial/diagnóstico , Huesos Faciales/diagnóstico por imagen , Huesos Faciales/patología , Humanos , Maloclusión/clasificación , Maloclusión/diagnóstico , Mandíbula/diagnóstico por imagen , Mandíbula/patología , Maxilar/diagnóstico por imagen , Maxilar/patología , Desarrollo Maxilofacial/fisiología , Ortodoncia Correctiva , Planificación de Atención al Paciente , Tomografía Computarizada por Rayos X/métodos , Diente/diagnóstico por imagen , Diente/patología
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