Abstract
BackgroundIt is difficult to maintain complete dentures during meals in place. This in vitro study aimed to assess changes in denture retention between rest and function using denture adhesives and oral moisturizers in an oral cavity model.MethodsThe following test samples were applied between the palatal plate and the edentulous jaw ridge model: denture adhesive, denture adhesive for dry mouth, oral moisturizer, and denture moisturizer. The retentive force was measured under two conditions: at rest while immersed in water and during function with a 2.5-kg load applied. The plate was pulled perpendicular to the occlusal plane and the retentive force was measured using a digital force gauge.ResultsUnder dry conditions, denture adhesive for dry mouth and oral moisturizer had a significantly higher retentive force than denture adhesive and denture moisturizer. After 30 min of immersion in water, the retentive force of the denture adhesive increased while that of the oral moisturizer decreased. After 30 min of function, the retentive force of the denture adhesive and denture adhesive for dry mouth remained high, while that of the oral moisturizer and denture moisturizer significantly decreased. Between rest and function, the retentive force of the denture adhesive and denture adhesive for dry mouth was high, and that of the oral moisturizer was low.ConclusionsImmediately after use, denture adhesive for dry mouth exhibited high retentive force, but retention gradually decreased due to its water content.
Highlights
It is difficult to maintain complete dentures during meals in place
For elderly patients with an aggravated edentulous jaw, denture adhesives are recommended for denture retention and stability during function [10]
Ohno et al [16] measured the retentive force of test samples after drying the plate and discovered that denture adhesives for dry mouth and oral moisturizers had a significantly higher retentive force than denture adhesives
Summary
It is difficult to maintain complete dentures during meals in place. This in vitro study aimed to assess changes in denture retention between rest and function using denture adhesives and oral moisturizers in an oral cavity model. In Japan, the elderly population aged 65 years and older is increasing at an unprecedented rate, accounting for 28.4% of the total population (2019: Ministry of Internal Affairs and Communications). This is the highest number in history and is expected to further increase for the 30 years [1]. Ohno et al [16] measured the retentive force of test samples after drying the plate and discovered that denture adhesives for dry mouth and oral moisturizers had a significantly higher retentive force than denture adhesives
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