Comparisons.

Two approaches weighed against each other, on the evidence.

• In-chair whitening versus home trays for sensitive teeth: which hurts less?
  In-chair whitening and home trays carry about the same risk of tooth sensitivity: a 2025 updated systematic review and meta-analysis that pooled 23 trials found no significant difference between them (RR 0.82, 95% CI 0.6
• Potassium nitrate mouthwash versus toothpaste: two small studies that disagree, and two literatures that measure different things
  Nobody can tell you whether a potassium nitrate mouthwash works better or worse than a potassium nitrate toothpaste, because only two studies have ever put the two in the same trial and they came to different answers12.
• Potassium nitrate, arginine, strontium and stannous fluoride compared: which of them actually acts on the nerve
  Of the four actives sold for calming a sensitive nerve, only potassium nitrate is aimed at the nerve; arginine, strontium salts and stannous fluoride are occluding agents that narrow the dentine tubule so that less fluid
• The Sensodyne range decoded: which variant uses which active, from the published ingredients
  Three chemically unrelated actives are sold under one brand name, and the ingredient list on the back of the tube is the only reliable way to tell which one you are holding: calcium sodium phosphosilicate, stannous fluor
• Tubule occlusion versus nerve desensitisation: what each approach can and cannot do
  Occlusion and nerve desensitisation are two different physical jobs — one narrows the open channels in exposed dentine, the other acts on the nerve at the far end of those channels — and the division is real chemistry, b