Oral health of nursing home residents in Flanders, Belgium, and its associated factors

Oral health in care-dependent older adults is often compromised due to care dependency associated with deteriorating general health. This cross-sectional study assessed the oral health of 458 nursing home residents in Flanders, with a mean age of 82.7 years (70.3% female), using the optimised Oral Health Section of the interRAI Suite of Instruments and validated dental indices. Among residents with natural teeth (53.9%), poor oral hygiene (75.7%), poor tooth condition (56.6%), and poor gum condition (49.9%) were common. High dental plaque levels yielded a mean Oral Hygiene Index of 4.5, and 44.0% of participants had untreated caries with pulp involvement. A mean Modified Gingival Index of 1.8 indicated mild inflammation of the entire gingiva. Denture hygiene was inadequate in 68.5% of cases. Self-reported issues included dry mouth (32.8%) and chewing difficulties (23.4%). The higher correlation coefficients were observed between oral hygiene and gum condition (r = 0.324, p < 0.0001) and between chewing difficulty and pain (r = 0.247, p < 0.0001). Bivariate analyses showed cognitive and functional impairments were strongly linked to poor oral hygiene and gingival health. These findings highlighted the persistent need to improve oral health care in nursing home residents, particularly among those with cognitive decline or reduced self-care abilities.