This is not particularly standard, as the exact size of the gap may vary depending on the restoration method used. There is also the issue of price which varies from region to region and from one level of care to another, public or private. In a more common clinical situation, for example, if a filling is made with a cheaper material, such as traditional silver mercury, or glass ionomer. Usually, it can be fixed for less than$200. But now the common method of filling in the clinic is resin restoration, resin, relatively better material, and more expensive, about 300 yuan. But if the clinical gap of some front teeth, need some better cosmetic resin or cosmetic restoration, the price is not necessarily, it may be several hundred, even thousands are possible.