Dentistsresearchers have come up with the formula for the perfect smile, from the sizewidth of each tooth to the curve, colourshape of the teeth,the overall width of the smile.

• 牙医师和研究人员提出了完美笑容的黄金比例，从每个牙距离弯曲的尺寸、宽度、牙齿的颜色、形状及微笑是的宽度。