While in contact with the teeth, the gel releases oxygen free radicals, which whiten teeth over time. Prolonging the contact time delivers the best results. For even better results, you can combine teeth whitening gels with composite bonding or veneers to create a smile any Hollywood A-lister would be proud of. Choose between day and night kits — depending on the results you’re looking for. You can wear the kits for just an hour or overnight, so achieving the smile you’ve always dreamed of doesn’t have to be too inconvenient.