Those pursuing perfection are advised to hide their gums, hold back on the bleach, cover the bottom teeth and set their lips at just the right angle."Everyone wants the perfect smile and Jessica Simpson is the one we get asked to reproduce the most," says Dr Nicholas Davis of Loma Linda University School of Dentistry.

　　专家建议，那些追求完美笑容的人应该藏起他们的牙肉，不要漂白牙齿，不要露出下排牙齿、嘴唇要保持合适的弧度。洛马·林达大学牙医学院的尼古拉斯·戴维斯博士说：“每个人都想拥有完美笑容，而杰西卡·辛普森成为最多人模仿的对象。”