EnamelAmelogenesis ImperfectaTooth enamel is a fascinating tissue with exceptional biomechanical properties that allow it to last for a lifetime. In this mini review, we discuss the unique embryonic origin of this highly mineralized tissue, the complex differentiation process that leads to its "...
题目中的句子应为"The hard, outer surface of the tooth is called enamel.",其中存在拼写错误(out→outer,en amel→enamel)。选项分析如下:- A. "outside"为介词/副词,无法修饰名词"surface",排除;- B. "appeara nee"疑似拼写错误且语义无关;- C. "outer"正确,符合"outer surface"的语法和语义;- D...
The hard, {{U}}out{{/U}} surface of the tooth is called enamel. A.outsideB.appearanceC.outerD.hiding 答案 C[分析] 形容词应用。 outside和outer均有“外部的”意思。但outside一般指物体的外表或表面,而outer指一种相对性,即相对于内部而言的外部或外表, appearance外貌,外观,hiding隐匿:在此指牙...
led by the paleoanthropologist Mario Modesto-Mata, which counts for the first time the two types of growth lines observed in the toothenamelof Lower and Middle Pleistocene hominids in Europe. This investigation has focused
Define neck of tooth. neck of tooth synonyms, neck of tooth pronunciation, neck of tooth translation, English dictionary definition of neck of tooth. n. 1. Anatomy a. The part of the body joining the head to the shoulders or trunk. b. A narrow or constri
Micro-anatomical description of Port Jackson shark tooth enameloid During their development, shark tooth “files” (anteroposterior columns of teeth; Fig.1a) are continuously in motion, with individual teeth traveling from the dental epithelium inside the mouth, up and over the edge of the jaw, ...
An important part of our dentition is not just the enamel crowns of the teeth, but also the roots that anchor those teeth into our jaws. Dental root morphology is also variable and can be an important characteristic of fossils.The arrow in the above picture is pointing to what part of the...
和后文的“Stem cells have the 4 to turn themselves into any other type of cell in the body. It may soon be possible, the researchers claim, to use those 5 cells to regrow a tooth’s enamel naturally.”可知,利用干细胞自然地再生牙齿的牙釉质是对前文用人工填充物填补空隙的替代方法。故选B...
Natural ivory is a bone-like material largely made of a mineral called dentine, which lies underneath the enamel of a tooth. And whilst human teeth are used for eating, ivory tusks are teeth that have emerged beyond the lips, giving elephants an evolutionary advantage. ...
How Does pH Affect My Tooth Enamel? Ready for a mini science lesson? The “H” in pH stands for the chemical element hydrogen, and the “p” refers to the word "potential." So, pH is the “potential of hydrogen” andtranslates the values of the concentration of the hydrogen ions. The...