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Effects of overnight storage conditions on conventional complete removable prostheses

Yasmine Bouattour Med. Dent., MAS/Nicole Kalberer Med. Dent., MAS/Najla Chebib Dr.Med. Dent, MS/Philippe Mojon Dr. Med. Dent./Albert Mehl Prof. Dr. Med. Dent. habil/Murali Srinivasan Prof. Dr. Med. Dent, BDS, MDS, MAS/Frauke Müller Prof. Dr. Med. Dent. habil. Dr. h.c.


DOI: 10.11607/ijp.7158

Purpose: To evaluate the effects of overnight storage conditions on the dimensional stability and retention of prostheses, as well as the participant’s subjective perception of these interventions. Materials and Methods: Subjects with maxillary complete prostheses (CRPs) were randomly assigned to receive two interventions in a crossover design: storing the CRPs overnight in a dry or wet environment with a cleansing tablet. The denture intaglio surface was scanned, and outcome measures were collected before each intervention (BLN), post ntervention (PIS), and after immersion in water for 15 minutes after the intervention (WOC). Dimensional changes were analyzed for the total surface, anterior flange, palate, and tuberosities. Retention force was measured using a dynamometer, and the participants’ subjective assessment of comfort, fit, and retention of their CRPs were collected. After verifying normal distribution, paired t and Wilcoxon signed-rank tests were used to check for any statistical significance (α = .05). Results: Ten participants (mean age: 76.5 ± 5.9 y) were recruited in this study. Between BLN and PIS, the dimensional changes after dry intervention were significantly less than when stored wet for total surface (P = .009), anterior flange (P = .028), and the palate (P = .005). No difference was found between the effects of storage or washout interventions on objectively measured CRP retention. However, after WOC following dry storage, participants perceived a lower retention (P = .021), and a more comfortable palate after WOC following the wet intervention (P = .018). Conclusion: For dimensional stability, dry overnight storage of removable prostheses can safely be recommended when indicated. Immersion in water for 15 minutes does not seem to add advantages.


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