The stain removal ability of teeth cleaning kit
The stain removal ability of teeth cleaning kit Methods the melamine sponge thickness of teeth cleaning kit was compressed and the destruction of the partition wall structure during the compression process was examined under a stereoscopic microscope. An extracted human tooth was cleaned by normal polishing or with teeth cleaning kit for 90 s. To evaluate the stain level, the tooth surfaces were photographed under a stereoscopic microscope at 0, 30, 60 and 90 s. The residual stained region was traced [...]
