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相关概念视频

Tooth Anatomy01:21

Tooth Anatomy

560
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
560

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相关实验视频

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Dynamic Navigation in Endodontics: Guided Access Cavity Preparation by Means of a Miniaturized Navigation System
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后牙的根综合体:直接的数字分析.

Karim O Ghishan, Emilio Couso-Queiruga, Fernando Suárez-López Del Amo

    The International journal of periodontics & restorative dentistry
    |July 20, 2023
    PubMed
    概括

    这项研究精确地绘制了后牙的3D根综合体. 结果显示,根干长度和根度存在显著差异,影响了牙科治疗和工具设计.

    科学领域:

    • 牙科解剖学 牙科解剖学
    • 数字牙科数字牙科
    • 形态测量 形态测量 形态测量

    背景情况:

    • 精确的3D描述后牙根复合体对于有效的临床管理和技术进步至关重要.
    • 目前关于和下后牙根复合物的详细形态,包括根干尺寸和根的现有数据是有限的.

    研究的目的:

    • 精确确定三维 (3D) 形态和维度特征的根复合在大和下后牙.
    • 评估诸如根干长度,根表面积,根度宽度和孔入口等特征.
    • 提供可以为临床实践和牙科工具的开发提供信息的数据.

    主要方法:

    • 对240个取和保存的永久后牙进行了形态分析.
    • 所有牙的数字扫描以捕捉3D形态.
    • 根综合特征的详细评估,包括根干和个体根尺寸,根 (RC) 和孔入口.

    主要成果:

    • 大第一个前表现出一个长根干 (10.49毫米,表面积的65.52%),两个较短的根.
    • 牙骨干的根茎平均比牙短0.8毫米.
    • 预计将会出现III类裂,对牙和上第一前牙有特定的临床附着损失值.
    • 根 (RCs) 在评估的后牙中非常普遍.

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    结论:

    • 大和下后牙的根复杂形态存在显著的变异.
    • 根是常见的发现,需要在临床程序中仔细考虑.
    • 这些发现为后牙的临床管理提供了宝贵的见解,并指导了专门牙科仪器的开发.