在实验室中,细菌通过根内管穿透和传播,根内充满了基于酸的水泥
1UWA Dental School, The University of Western Australia, Nedlands, Western Australia, Australia.
概括
像Biodentine和ProRoot MTA这样的酸根填充剂没有阻止细菌通过牙管道透. 在填充牙的管道内发现了细菌,这表明根管感染的潜在途径.
科学领域:
- 牙周内科医院 牙周内科医院 牙周内科医院
- 牙科材料科学 牙科材料科学
- 微生物学 微生物学
背景情况:
- 根管治疗的目的是消除内细菌.
- 基于酸的密封剂广泛用于根运河堵塞.
- 了解细菌通过根填充物透是内牙成功的关键.
研究的目的:
- 评估基于酸的根填充材料在防止细菌透方面的有效性.
- 为了研究细菌入侵根充满牙的途径.
主要方法:
- 人类单根牙被填充了Biodentine或ProRoot MTA.
- 一个带有Streptococcus gordonii的双室模型被用来评估150天内的细菌泄漏.
- 使用扫描电子显微镜 (SEM) 检查牙管内细菌的存在.
主要成果:
- 在用Biodentine和ProRoot MTA填充的牙的冠状三分之一内检测到细菌.
- 在两组实验组 (Biodentine和ProRoot MTA) 的牙管中,超过90%的检查区域显示出细菌存在.
- 在Biodentine和ProRoot MTA之间没有观察到细菌透的显著差异.
- 在实验或负对照组的下腔室中没有检测到度,这表明没有严重的泄漏.
结论:
- 基于酸的根填充材料,包括Biodentine和ProRoot MTA,并不能完全防止细菌通过牙管道透.
- 细菌可以通过牙管道穿透根充满牙的牙.
- 在这项研究中,Biodentine在防止细菌透方面表现与ProRoot MTA相似.
相关概念视频
01:30Bacterial Signaling
32.1K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
32.1K
01:18Porosity in Cement Paste
140
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
140