1. American Dental Association. (2023). "Tooth Sensitivity: Causes and Treatment." [ADA.org](https://www.ada.org)
2. Mayo Clinic. (2023). "Sensitive Teeth: Causes, Symptoms, and Treatment." [Mayo Clinic](https://www.mayoclinic.org)
3. WebMD. (2023). "Tooth Sensitivity: Causes, Symptoms, and Treatment." [WebMD](https://www.webmd.com)
4. Healthline. (2023). "What Causes Sensitive Teeth?" [Healthline](https://www.healthline.com)