Final answer:
The most helpful aid for removing supragingival plaque would be a toothbrush. Toothbrushes are designed to physically remove plaque and food debris from the teeth and gumline. Dental floss can also be used to remove plaque from areas that a toothbrush cannot reach.
Step-by-step explanation:
The most helpful aid for removing supragingival plaque would be a toothbrush. Toothbrushes are designed to physically remove plaque and food debris from the teeth and gumline. Toothpaste, used in conjunction with toothbrushes, contains abrasive particles that aid in plaque removal. Dental floss can also be used to remove plaque from areas that a toothbrush cannot reach, such as between teeth and along the gumline.