Which statement about bristle length is correct according to the material?

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Multiple Choice

Which statement about bristle length is correct according to the material?

Bristle length affects how well a toothbrush reaches and cleans all surfaces, especially the back teeth and grooves. The material specifies that most bristles are about 20 mm long, which provides enough reach to clean both anterior and posterior surfaces while still allowing proper flex and control. Shorter lengths like 11 mm or 5 mm may not reach posterior areas effectively, and 2 mm would be too short to maintain good contact with tooth contours. Therefore, the statement that most bristles are about 20 mm long best matches the material.

Bristle length affects how well a toothbrush reaches and cleans all surfaces, especially the back teeth and grooves. The material specifies that most bristles are about 20 mm long, which provides enough reach to clean both anterior and posterior surfaces while still allowing proper flex and control. Shorter lengths like 11 mm or 5 mm may not reach posterior areas effectively, and 2 mm would be too short to maintain good contact with tooth contours. Therefore, the statement that most bristles are about 20 mm long best matches the material.

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