While past researchers have debated the presence of upper and lower teeth, he concluded that only the lower teeth are visible, likely because the upper teeth were hidden by the mustache and lips. A dental surgeon says there are visible teeth on the Shroud. By overlaying positive and negative images with a polarized filter, they claimed to see 20 upper and lower teeth, including roots. I disagree, since throughout the Shroud image, there is a melding of the image with the pattern of the weave. The dental surgeon said his expertise in oral anatomy and surgical experience allowed him to identify what he believes are parts of the lower teeth.