由微计算机断层扫描评估的下第一个牙的自然通道偏差和牙厚度
Carolina Alonso Amorim1, Marília F Marceliano-Alves2, Isabelle Louise Gomes1
1Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil.
Brazilian dental journal
|March 27, 2024
概括
微计算机断层扫描 (micro-CT) 显示了下牙的牙厚度一致.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 牙科解剖学 牙科解剖学
- 显微断层扫描 (microtomography) 是一种微观扫描技术.
背景情况:
- 了解根管形态对于成功的内牙治疗至关重要.
- 牙呈现复杂的根管系统,特别是 mesial 通道.
研究的目的:
- 为了评估第一个下牙的状根通道的集中和牙厚度.
- 为了分析 mesiobuccal (MB) 和 mesiolingual (ML) 通道与根心脏的偏差.
主要方法:
- 微计算机断层扫描 (micro-CT) 用于扫描99个第一个下牙,并使用Vertucci IV型道.
- 对MB和ML通道在全长和顶部4mm的牙厚度, mesiodistal偏差和中心点进行了评估.
主要成果:
- 牙的厚度在MB和ML通道之间是一致的,从0.07mm到2.46mm不等.
- 无论是MB和ML通道,都显示出与根心脏的显著偏差.
- 偏差主要朝着 mesial,在52%的病例中,ML通道的顶端4mm有显著的远距离偏差.
结论:
- 在下牙中的质根通道表现出可变的集中,频繁出现质偏差.
- 一致的牙厚度并不能保证通道的中心性.
- 这些发现对内牙接入和仪器仪表策略有影响.
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