Senthil Thangadurai, Marta Majkut, Joshua Milgram, Paul Zaslansky, Ron Shahar, Emeline Raguin
The palette of mineralized tissues in fish is wide, and this is particularly apparent in fish dentin. While the teeth of all vertebrates except fish contain a single dentinal tissue type, called orthodentin, dentin in the teeth of fish can be one of several different tissue types. The most common dentin type in fish is orthodentin. Orthodentin is characterized by several key structural features that are fundamentally different from those of bone and from those of osteodentin. Osteodentin, the second-most common dentin type in fish (based on the tiny fraction of fish species out of ∼ 30,000 extant fish species in which tooth structure was so far studied), found in most Selachians (sharks and rays) as well as in several teleost species, and is structurally different from orthodentin...
January 13, 2024: Journal of Structural Biology