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Master Thesis

Évaluation des pratiques du Grand-Ouest concernant l'utilisation d'ancrages osseux à visée orthodontique

Abstract : Dental displacement is based on a number of biomechanical principles, including Newton's law of action/reaction. This reaction creates parasitic movements that slow down orthodontic treatments. Better anchoring helps us to control secondary movements and allows us to respect the treatment objectives. After analyzing the factors of failure we will evaluate the practices of the Great West (Normandy and Brittany) in order to compare them with scientific data. A survey was carried out during one month with the help of a questionnaire comprising 21 questions and sent by e-mail to doctors or dentists oral surgeons or stomatologists or orthodontists or maxillo-facial surgeons practising in the Great West. We received 48 responses and out of the 48, 9 were excluded because they had non-inclusion criteria. Minivis are easier to access than plates and practitioners are not always trained on these anchoring means. These aids are most often placed under local anaesthesia and used to close spaces, insert teeth or in Class II but also to reduce treatment times. In preoperatively the cone-beam is not systematic and taking into account the profile of the patient (hyper or hypodivergent) does not change their behaviour. The majority of the minivis placed are self-drilling, with diameters between 1.2 and 1.5mm, placed in gum attached with a screwdriver. Failure does not call into question their use, but if it does occur, the minivis are immediately put back in another site or after healing. There are no more failures observed in the maxilla than in the mandible. The main disadvantages of this technique are the lack of demand and the extra cost. Orthodontic bone anchors are already used by many practitioners in the Great West. This simple and very useful technique deserves to be better exploited with a selection of patients, placement sites, materials used and techniques employed. Thanks to the training of the interns we hope that this method will be more and more applied and better mastered in our territory. The plate type anchorage requires more advanced surgical training and giving up on it by preferring screws only because we do not want to refer a patient seems undesirable.
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Master Thesis
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SOUFFLET Elise Chir Orale.pdf
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Élise Soufflet. Évaluation des pratiques du Grand-Ouest concernant l'utilisation d'ancrages osseux à visée orthodontique. Médecine humaine et pathologie. 2020. ⟨dumas-03159573⟩



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