Scientific article
OA Policy
English

Misfit of complete maxillary dentures' posterior palatal seal following polymerisation with four different autopolymerising resins: an in vitro study

Published inMaterials, vol. 15, no. 15, 5285
Publication date2022-07-30
First online date2022-07-30
Abstract

Background: The majority of complete dentures are still conventionally manufactured using a flask-and-pack technique. However, the polymerization process may introduce a distortion of the denture body. The aim of this study was to evaluate the three-dimensional fit of the posterior palatal seal of maxillary complete dentures with the original impression, and to give recommendations for scraping.

Methods: Four autopolymerising resins were used to manufacture 40 palatal plates each for high, medium and flat palates (total n = 120). The misfit was captured by taking a reline impression with a highly fluid silicone, the dimensions of which were measured with a flat-bed scanner.

Results: The shape of the palate had a significant impact (median p = 0.0435), but not the resin type (median p = 0.2575). It was largest for the flat palate and smallest for the high palate. The largest misfit was observed in the palatal midline area (flat-palate average median: 685 µm; high and medium palates: 620 µm) decreasing towards the lateral and anterior regions.

Conclusions: The results suggest compensating for the palatal misfit that occurs with autopolymerising resins by scraping a postdam of an approximately 0.7 mm depth to the master cast, decreasing towards the anterior and lateral areas. In high and medium palates, the scraping could be less pronounced.

Keywords
  • PMMA
  • Autopolymerising acrylic resin
  • Complete maxillary denture
  • Misfit
  • Posterior palatal seal
  • Scraping of the master cast
Citation (ISO format)
SCHILLER, Simone et al. Misfit of complete maxillary dentures” posterior palatal seal following polymerisation with four different autopolymerising resins: an in vitro study. In: Materials, 2022, vol. 15, n° 15, p. 5285. doi: 10.3390/ma15155285
Main files (1)
Article (Accepted version)
Identifiers
Journal ISSN1996-1944
95views
226downloads

Technical informations

Creation26/09/2022 15:18:00
First validation26/09/2022 15:18:00
Update time16/03/2023 07:40:44
Status update16/03/2023 07:40:43
Last indexation01/11/2024 02:51:00
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack