A patient with Parkinson's disease needs assistance with daily oral hygiene. What oral hygiene task is MOST DIFFICULT for Parkinson's patients to perform due to their disease?

Parkinson's disease causes progressive loss of motor function, including resting tremor, rigidity, bradykinesia (slowness of movement), and postural instability. Precise fine motor tasks such as toothbrushing and flossing are particularly challenging for Parkinson's patients. The tremor and reduced hand dexterity make it difficult to control a toothbrush adequately, and bradykinesia reduces the efficiency of brushing strokes. This leads to poor oral hygiene, increased caries risk, and periodontal disease in this population. Oral hygiene aids such as electric toothbrushes, modified handle toothbrushes, and floss holders can help. Dental teams should consider caregiver-assisted oral hygiene for advanced Parkinson's patients.