ABSTRACT
Introduction : En prothèse fixée dento-portée, la préparation des dents supports est la soustraction des tissus dentaires coronaires ou corono-radiculaires, qui permet d'obtenir l'espace prothétique nécessaire à l'adaptation parfaite de l'ancrage prothétique. C'est un acte essentiel du plan de traitement que de nombreux praticiens appréhendent. Objectif : Ce travail vise à comparer les angles de convergence des parois mésio-distales (proximales) avec ceux des parois vestibulo-linguales des modèles positifs unitaires pour apprécier les difficultés inhérentes à leur préparation. Méthodes : Il s'agit d'une étude expérimentale qui a consisté à la mesure de l'angle de convergence des parois de 249 modèles positifs unitaires (MPU) à l'aide du logiciel d'acquisition et de traitement d'image du microscope digital PCE-MM 200 UV®. Les données recueillies ont été traitées et analysées à l'aide du logiciel SPSS version 20. Résultats : L'angle moyen d'inclinaison des parois vestibulo-linguales (30,95±15,32°) est statistiquement supérieur à celui des parois mésio-distales (21,82±10,89°) (p=0,000). Conclusion : La préparation des faces vestibulaires et linguales est plus difficile à réaliser que les faces mésiales et distales en raisons l'accès visuel indirect qui n'est pas toujours aisé et de la morphologie de ces faces. L'utilisation de techniques de préparation comme la pénétration contrôlée pourrait constituer un moyen efficace pour réduire de façon significative l'angle de convergence des faces vestibulaire et linguale et augmenter ainsi la valeur rétentive des préparations
ABSTRACT
INTRODUCTION: Access to cervical margins allows the practitioner to record the entire cervical margin in order to provide a true copy to the technician. This requires a gingival displacement obtainable by different techniques. This study aimed to assess the implementation of gingival displacement methods prior to impression taking in fixed prosthodontics. MATERIALS AND METHODS: This is a descriptive and cross-sectional survey of sample of 71 dentists practising in Abidjan, Ivory Coast; which ran from October 2nd, 2010 to November 14th, 2010. A survey form was administered to dentists. The questionnaire was organised around the following headings: identification of dentists and practice of gingival displacement methods. The data processing done using software Epi Info 6 and Excel XP on Window XP, allowed calculation of frequencies, means and proportions and the establishment of connection between variables with the chi2 test. The significance level was set at p < 0.05. RESULTS: The results of the survey indicate that non-surgical methods of gingival displacement, including retraction cords and temporary crowns are those they use most frequently (76.4%) because the vast majority of practitioners (87.22%) believe the most traumatic to the periodontium are surgical methods. CONCLUSION: Our study showed that the gingival displacement methods are frequently carried out in daily practice, regardless of the topography of the abutment teeth and their number, but with a preference for non-surgical methods, particularly those using retraction cords and temporary crowns. The use of injectable gingival displacement paste is not harmful to the periodontal tissues, easy to use and have a very efficient haemostatic action. It should also be known and practiced.
Subject(s)
Attitude of Health Personnel , Dentists/psychology , Gingival Retraction Techniques/psychology , Cote d'Ivoire , Cross-Sectional Studies , Crowns/psychology , Curettage/psychology , Dental Impression Materials/chemistry , Dental Impression Technique/instrumentation , Dental Restoration, Temporary/psychology , Electrosurgery/psychology , Gingiva/injuries , Gingival Retraction Techniques/instrumentation , Humans , Self ReportABSTRACT
Studies on the dental health in Ivory Coast showed that the specific needs in prosthesis are numerous. Are there covered? What are the rates of the prosthetic consumption? It is to this question that the authors of the present work wanted brought a beginning of answer through a pilot prospective survey on the prosthetic demand to the service of prosthesis of the CCTOS of Abidjan. This survey was about 150 patients of all sex and all age come specifically for prosthetic rehabilitation, during the active period of February to April 1994. It takes out again of this survey this following results: from a general epidemiological point of view, the women are more numerous than the men, with an access frequency of 56%. Most topics are young, with an age between 20 and 30 years. The "social" rates that convenient the CCTOS attract the patients whose economic income is little important gladly or that are deprived of a health insurance. The prosthetic antecedents show that more than 65% of the topics never carried mainly a prosthesis for lack information or for lace money. Among the topics that already underwent a prosthetic treatment, prosthesis associate partial resin is the more frequently recovered in spite of an interesting rate of fixed prosthesis (37% of carriers). The clinical data reveal that aesthetic remains the main motive of the consultation, with 58% of demands and the prosthesis associate resin is in more of 70% of the cases the chosen therapeutic option.
