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No, the hardest substance in the human body is you tooth enamel. it the the outermost part of the teeth and next to it is the dentin which is softer than enamel but harder than bone
Hardest compont of the human body is the Enamel of the tooth (above gum line - gingivi) with approximately 95% calcium concentrationThe Dentin of the tooth (within enamel) has approximately 80%...