1.Do not fit brooches or caps. 2.If you are not satisfied with the fit, you can simply remedy as many times as you want. For this product to stay firm in the mouth, a person must have existing tooth structure. 3.This product is not a denture or dental device. This article is intended only to improve your appearance. Fitting Instructions: Place adhesive in a cup of hot (almost boiling) water for 1 minute. This will make them flexible and ready to custom fit. Using a mirror, firmly position the teeth covers over your existing teeth. Press them firmly against your teeth and gently tap the impression material with your thumbs behind your real teeth. Gently relieve the teeth from your mouth after 30 seconds and place them in a glass of cold water to cool. The print material turns white when cured. Note: While through boiling water, teeth may be soft and stick to your teeth.