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Posterior palatal seal adaptation: influence of processing technique, palate shape and immersion
Author(s) -
SYKORA O.,
SUTOW E. J.
Publication year - 1993
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.1993.tb01511.x
Subject(s) - immersion (mathematics) , materials science , trimming , dentistry , orthodontics , mathematics , medicine , computer science , geometry , operating system
Summary Accuracy of fit of denture bases is critical to adequate retention. This study compared the dimensional change of a newer continuous‐injection technique with a standard trial‐pack technique as determined by measuring the posterior palatal border opening. The influence of palate shape and immersion were also assessed. Stone casts were made from master moulds with either a high or flat palate. Denture base adaptation was measured at 5 mm intervals across the entire posterior palatal border. Measurements were made after deflasking, trimming and polishing, and after immersion in room temperature water for l h, 1 day and 1 week. Statistical analysis ( P < 0.05) showed that where differences occurred between the two techniques, openings were always smaller for the continuous‐injection technique. It was also shown that dimensional changes were always larger for the flat palate compared with the high palate. Dimensional change using the continuous‐injection technique was reduced by immersion in water, while no influence was observed for the trial‐pack technique. It was concluded that the continuous‐injection technique showed smaller dimensional changes compared with the standard trial‐pack technique, and that these changes were influenced by palate shape and immersion in water.