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相关概念视频

Teeth01:15

Teeth

404
The formation of teeth, also known as odontogenesis, is a complex process that begins in utero, around the sixth week of embryonic development. There are three stages to this process: the bud stage, the cap stage, and the bell stage.
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
404

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相关实验视频

Updated: Jun 28, 2025

Author Spotlight: Establishing an Accurate Microhardness Testing Protocol for Craniofacial Tissues
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在遗传性牙缺陷的孤立牙上进行微型CT研究.

Anpeng Han1, Fangli Lu2, Yuping Lu3

  • 1Dept. of Stomatology, the First Affiliated Hospital of Zhengzhou University, Henan Stomatological Hospital, Zhengzhou 450052, China.

Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology
|April 10, 2024
PubMed
概括

微型计算机断层扫描 (Micro-CT) 显示,与健康个体相比,牙发育不完善型II (DGI-II) 和牙发育不良型I (DD-I) 患者的牙结构和矿化密度存在显著差异. 与DGI-II牙相比,DD-I牙显示出更严重的矿化缺陷.

关键词:
微型CT技术的使用牙发育不良 牙发育不良牙生殖不完美症 (dentinogenesis imperfecta) 是一个不完美的疾病.三维重建的三维重建牙矿物化 牙矿物化

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科学领域:

  • 牙科科学 牙科科学
  • 生物材料科学是生物材料的科学.
  • 放射学 放射学是一门学科.

背景情况:

  • 牙发育不完善型II (DGI-II) 和牙发育不良型I (DD-I) 是遗传性牙缺陷,影响牙结构和矿物化.
  • 了解这些牙的三维 (3D) 内结构和矿化密度对于诊断和管理至关重要.

研究的目的:

  • 使用微型CT,构建DGI-II和DD-I患者牙的3D结构.
  • 分析受影响牙的内部形态和硬组织矿化密度.

主要方法:

  • 从DGI-II,DD-I患者的第三牙和健康对照的3D牙结构的重建,使用Micro-CT.
  • 沿着斜面和横面平面观察内部结构.
  • 计算质,皇冠牙和根牙的灰度值,以评估矿化密度.

主要成果:

  • 成功地进行了牙遗传性牙缺陷的3D重建,包括牙盖,牙核心和牙腔.
  • DGI-II牙表现出不完全化的脉腔和狭窄的根通道.
  • DD-I 牙显示了被消灭的肉质腔和根通道,没有根;DGI-II 和 DD-I 两组都比对照组具有较低的矿化,DD-I 显示了更显著的根牙矿化减少.

结论:

  • 微CT是一种有效的方法,用于3D重建和定量分析遗传牙缺陷的牙中矿化密度.
  • DGI-II和DD-I牙都显示牙矿化减少,DD-I牙受影响更严重.
  • 异常的脉腔化和狭窄或封闭的根通道是特征性的发现.