Your finger nails allow the best freedom of movement allowing the resident to move around and function independently, with as little intervention, whereby, fostering independence and rehabilitation. 

Effective finger nail grooming presents higher self-esteem with a feeling of acceptance in the environment or community events. 

Scratches or cutting the skin may cause infections to incur, so care must be given or overseen so the resident does not experience difficulties; with skin hazards.

(Nursing Assistant Blog)