Objective To investigate the features of primary tooth structure in hypophosphatasia.

目的观察低磷酸酯酶症在乳牙结构上的表现。

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Crowns strengthen and protect the remaining tooth structure and can improve the appearance of your smile.

牙冠可以加强和保护剩馀的牙齿结构，并改善外观。

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It has been proved that many kinds of genetic diseases can influence the development of tooth, with symptoms of abnormalities in tooth structure, appearance.

目前研究发现多种遗传性疾病都能影响到牙齿的发育，表现为牙齿结构、形态、数目和萌出等方面的异常。

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"The less tooth structure you remove, the longer the tooth will last, " says Dr. Spitz, who is occasionally paid to speak for Biolase.

WSJ: To Cut Tooth Decay: A Laser vs. a Drill

Lasers vary in type, but one major brand, Waterlase, works by heating water molecules in the tooth, which then expand and dislodge decayed tooth structure, according to manufacturer Biolase Inc.

WSJ: To Cut Tooth Decay: A Laser vs. a Drill