Does sequencing matter? A cross-over randomized trial to evaluate a bi-level community-based intervention to improve oral hygiene among vulnerable adults.

Both interventions were successful in improving GI and PS. The building-level intervention did not provide much additional benefit when it followed the individual intervention although it may have had a sustaining effect. The findings on the cognitive/emotional/behavioural variables support the importance of these factors and should be considered when implementing oral hygiene interventions.