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RT @shirleychensama: In the article below, it show that he enamel is the hardest part of the tooth. It have a young's modulus of 83GPa. htt…
RT @shirleychensama: In the article below, it show that he enamel is the hardest part of the tooth. It have a young's modulus of 83GPa. htt…
In the article below, it show that he enamel is the hardest part of the tooth. It have a young's modulus of 83GPa. https://t.co/xcaVUd1GAz