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Complexometric Titration: Ligands00:43

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Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
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兰离子工程混合层改善了牙结合.

X Li1, Y Wu1, Y Lu1

  • 1Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province, Hangzhou, China.

Journal of dental research
|July 28, 2025
PubMed
概括

兰离子 (La3+) 预处理通过脱水牙,抑制酶和细菌,稳定酸,改善牙粘合剂的粘合. 这种20秒的椅子策略显著提高了恢复寿命,并减少了临床失败.

关键词:
结晶化 结晶化的过程.脱水 脱水 脱水 脱水牙结合 牙结合 牙结合防御工事的强化 防御工事的强化稀土是一种稀土.

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In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
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科学领域:

  • 生物材料科学和牙科修复材料.
  • 纳米技术和表面修饰以提高粘合力.

背景情况:

  • 牙科修复失败是昂贵的,主要原因是患者因素和粘合界面退化.
  • 降解涉及水合脱矿牙基质 (DDM),可溶性酸 (HAP),以及由基质金属蛋白酶 (MMP) 和微生物分解的原体.

研究的目的:

  • 在粘合剂修复中制定一个同步的策略,解决DDM水化,HAP溶解和原降解的问题.
  • 评估离子 (La3+) 预处理对改善粘合剂-牙接口的有效性.

主要方法:

  • 在粘合剂应用之前,DDM的La3+ (LaCl3溶液) 预处理.
  • 使用电子显微镜,光谱学 (X射线,FTIR),原子力显微镜和现场生殖学进行表征.
  • 通过微拉伸键强度,纳米泄漏和对Streptococcus mutans的抗菌活性来评估结合的有效性.

主要成果:

  • 拉3+预处理诱导非原蛋白聚合,脱水DDM和增强粘合剂透.
  • MMP活性降低了~100%,Streptococcus mutans的生长被抑制,HAP被重塑成稳定的Ca8La2(PO4)6O2.
  • 修改后的接口显示了酶耐药性,细菌抑制和结构强化,导致热循环后的结合强度提高了77.30%.

结论:

  • 拉3+预处理提供了针对粘接接口降解的三模干预措施.
  • 这种在临床上可翻译的20秒的协议增强了结合,减少了失败,并为可持续的牙科护理提供了变革性的潜力.