Phân tích tư tưởng của nhân dân qua đoạn thơ: Những người vợ nhớ chồng… Những cuộc đời đã hóa sông núi ta trong Đất nước của Nguyễn Khoa Điềm
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Most of the intrinsic discoloration encountered in everyday practice is caused by the breakdown of blood products of the pulp
tissue, due to trauma or a traumatic incident (Figure 7-7).This type of discoloration (ie, blood degradation) occurs during hemolysis,
when iron is released from hemin, hemosiderin, hematin, and hematoidin.Through the addition of the bacterial product hydrogen
sulfide, iron is converted to ferric sulfide, resulting in the discoloration of the tooth.The dental enamel tends to change color either
to orange, brown, or dark gray in color (Figure 7-8). In addition to blood product breakdown, the degradation of necrotic pulp tissue
may also cause discoloration. Fortunately, most...
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AESTHETIC BRACKETS
