Teeth Whitening FAQ
Sensitivity from tooth whitening is always transient. That means if there is any sensitivity caused by the whitening, it goes away within one to two days after the treatment, and the patient returns to the state of sensitivity he or she had prior to starting the whitening process.
Typically you can expect whitening to last from six months to two years, although some studies report results lasting up to ten years. Avoiding red wine, coffee, and smoking — all of which can cause staining — helps preserve the results.
Tooth whitening has little or no effect on restorative materials such as porcelain or crowns, but it may temporarily reduce the bond strength between enamel and composite restorations. This is why it’s a good idea to check with your dental professional before beginning any course of tooth whitening.