Background
stroke, edentulous, Parkinson’s disease, neurological diseases, denture adhesives, denture, dentulous, dry mouth
NEUROLOGICAL DISEASE, STROKE, CAVITY, DRY MOUTH, CREST
The proportion of older individuals in Japan has been increasing. According to the Statistics Bureau of the Ministry of Internal Affairs and Communications in 2022, the ageing rate was 29.3% and is expected to increase in the future [With the ageing of patients who require removable dentures, the oral cavity becomes more prone to oral motility disorders due to neurological diseases such as stroke and Parkinson’s disease [However, denture adhesives tend to adhere and remain on the oral mucosa and denture base. The American College of Prosthodontists’ guidelines on denture adhesives have also mentioned its problems regarding cleanability [Furthermore, denture adhesives are water absorbent and may contribute to dry mouth. For this reason, oral moisturizers with good cleaning properties may be used as a substitute for denture adhesives in patients with dry mouth [A gel-type denture adhesive for dry mouth with good cleaning properties has been recently developed for denture wearers with dry mouth [However, there have been no reports comparing the retentive force of dentures in the actual oral cavity with the use of denture adhesives, including those for dry mouth. This may be because denture wearers, especially edentulous patients, have various oral conditions in terms of the shape of the jaw crest, degree of oral dryness, etc. Moreover, measuring retentive force under the same conditions is difficult. Therefore, prior to measuring the maintenance force of dentures in the oral cavity, basic data must be collected first by performing measurements using an experimental palatal base in dentulous individuals with stable conditions. In a previous study [