Extrait

Background and study aims The movement of the mouth muscles can displace dentures (false teeth) if they are not positioned correctly. A dental impression (a mould of the mouth) is made to determine where in the mouth the dentures should sit. This space is called the neutral zone, where the forces of the muscles acting on the dentures are equal and opposite. This study will compare two neutral zone impression techniques to find out whether they produce different results. Who can participate? Patients aged 18 and over who are having new full dentures made at Leeds Dental Institute. What does the study involve? Participants are asked to attend one extra appointment in addition to their normal treatment. Two impression trays are custom made from the existing cast of the patient's mouth. The first impression tray is inserted into the patient's mouth and loaded with the impression material. The patient then performs mouth movements as instructed. Once the impression material has set the impression is removed from the patient's mouth and assessed. This process is repeated with the second impression tray. One impression is taken while the patient is wearing their upper denture and the other impression is the same except the patient does not wear their upper denture. The two impressions are sent to the dental laboratory, where they are compared. Following the extra appointment the patients' treatment continues; they have no further active role in the study and their ongoing treatment is not affected. What are the possible benefits and risks of participating? There are no direct benefits of participating, but the results will improve our understanding of a condition that impacts on the quality of life of some denture wearers. There are no known risks in addition to those associated with routine dental treatment for denture work. Where is the study run from? Leeds Dental Institute (UK) When is the study starting and how long is it expected to run for? June 2012 to June 2013 Who is funding the project? Leeds Dental Institute (UK) Who is the main contact? Alison Birtles

Critère d'inclusion

• Edentulousness

Liens

• ictrp
• isrctn