Background: In complete denture prosthodontics, the final impression stage plays a pivotal role in the success of a complete denture. prosthodontics. There are various factors associated with the retention of complete dentures, which may be broadly grouped as biological, physical and mechanical. These factors of retention can be achieved by means of an accurate border molding followed by an accurate final impression. Aim of the study: To compare dentures fabricated using different impression materials for border molding. Materials and methods: The present study was conducted in the Department of Prosthodontics of the Dental institution. For the study, selection of 25 healthy edentulous patients was done from the patients reporting to OPD clinic. It was made sure that alveolar ridge of the patients was well formed with satisfactory height and thickness. Patients having severe undercuts or bony exostoses and signs of inflammation, ulceraTion or hyperplasia were excluded from the study. Two acrylic resin custom trays were fabricated on the primary cast using autopolymerising acrylic resin and were labelled Tray 1 and Tray 2. The custom trays were reduced by 2 mm on all the edges to record muscle movements. Results: Two trial denture bases were constructed for each patient using two different border moulding techniques, green stick compound with zinc oxide eugenol and putty with polyvinylsiloxane. The mean retention force for Green Stick compound and Zinc oxide eugenol paste was 1622.44+395.28 gm and for Putty and Light bodied polyvinylsiloxane was 1904.48 + 511.22 gm. Conclusion: Within the limitations of the study we conclude that the dentures fabricated using simultaneous border moulding technique with heavy bodied polyvinyl siloxane has better retention force as compared to dentures fabricated using incremental border moulding technique with green stick compound.
Keywords: Border molding, complete denture, retention, prosthodontics.