Teeth and dental trivia

8 teeth and dental trivia questions, from easy to hard. Tap a question to see the answer. They're real questions from Rubicon, where you type the answer yourself and an AI judge reads what you meant.

This set covers Toothpaste & Oral Care.

Questions and answers

  1. Easy How do special toothpastes stop soft plaque from turning into hard buildup?

    They contain chemicals that bind minerals in saliva, preventing them from hardening into crystals on teeth.

  2. Easy Why do manufacturers add preservatives like sorbic acid to commercial toothpaste tubes?

    They prevent the growth of harmful bacteria and mold inside the moist tube over time.

  3. Easy How does brushing with fluoride toothpaste help repair early tooth damage?

    It speeds up remineralization by attracting essential minerals from saliva back into weakened spots.

  4. Medium How did early Broxodent electric toothbrushes receive power before rechargeable battery models became standard?

    They plugged directly into a standard household wall outlet using a cord attached to the handle.

  5. Medium Why did manufacturers ultimately phase out triclosan from popular household toothpastes like Colgate Total?

    Concerns grew over potential hormone disruption, antibiotic resistance, and mounting consumer pressure surrounding its long-term safety.

  6. Medium What active ingredient replaced triclosan in toothpastes like Colgate Total to maintain antibacterial protection?

    Stannous fluoride was adopted as a replacement, offering antibacterial properties against plaque and gingivitis, while also strengthening tooth enamel.

  7. Hard Why can peroxide-based whitening toothpastes lighten internal tooth discoloration, while abrasive silica pastes only treat superficial marks?

    Peroxide molecules diffuse through enamel pores into dentin, breaking down internal pigment complexes chemically.

  8. Hard While serving time in London's Newgate Prison in 1780, how did William Addis assemble what became the first mass-produced toothbrush?

    He saved an animal bone, drilled holes into it, and secured stiff bristles inside with glue.

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