CASE 8 Teeth can become increasingly yellow-brown in colour as the enamel of our teeth becomes more translucent with age. External staining from coffee, tea, red wine and smoking contributes to our teeth becoming dim. Tooth whitening can reverse this process and make out teeth appear whiter and brighter. It is a proven, safe proceedure if supervised by an experienced dentist. At PTD we favor a home bleeching technique as it avoids in most cases the tooth sensitivity that is commonly produced by the in-office power bleeching that is offered by some dentists.