相关实验视频
Updated: Jan 22, 2026

09:30
Methods for the Study of the Zebrafish Maxillary Barbel
Published on: November 23, 2009
13.1K
对严重损坏的上中央切口器进行后核心和内冠修复的评估:一个体外研究
The International journal of prosthodontics
|January 20, 2026
概括
CAD/CAM玻璃纤维后芯和混合陶内冠为缺乏的前牙提供了优越的断裂强度. 混合陶内冠是一种可靠,具有成本效益的选择,具有简化的工作流程.
科学领域:
- 恢复性牙科 恢复性牙科
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
背景情况:
- 在没有子的情况下恢复前牙 presents显著的临床挑战.
- 内冠和后核心系统之间的选择仍然是临床实践中持续辩论的主题.
研究的目的:
- 为了比较部中央切口器的断裂强度和故障模式.
- 评估的修复包括传统和CAD/CAM后核心系统与由各种材料制成的内冠.
主要方法:
- 五十个经过内治疗的部中央切口器被分为五组:玻璃纤维后/复合芯 (F),CAD/CAM玻璃纤维后芯 (CF),CAD/CAM PEEK后芯 (CP),混合陶内冠 (HE) 和脱内冠 (LE).
- 使用热循环后的通用测试机器评估了断裂强度.
- 微观分析故障模式,使用Kruskal-Wallis和Tukey测试进行统计分析.
主要成果:
- 在CAD/CAM玻璃纤维后核 (CF) 组显示了最高的断裂强度 (331.62N),60%可修复的故障.
- 传统的玻璃纤维柱 (F) 有100%可修复的故障,而CAD/CAM PEEK柱 (CP) 有80%可修复的故障.
- 混合陶内冠 (HE) 显示出明显更高的断裂强度 (313.9 N) 比脱内冠 (LE) (128.9 N),两者都有60%可修复的故障.
结论:
- CAD/CAM玻璃纤维后芯和混合陶内冠提供优越的断裂强度和主要可修复的故障.
- 混合陶内冠是临床上可靠的,具有成本效益的选择,用于缺前牙的简化工作流程.
- 玻璃纤维后故障的固有可修复性对于防止不可逆转的修复性故障至关重要.
相关概念视频
Restorative Care
2.4K
Restorative care is provided once a patient has been discharged from a healthcare facility and requires additional services. The additional services include home care, rehabilitation programs, and extended care. Restorative care centers help the patient regain their previous level of functioning or acquire a new level of functioning due to the incapacitating effects of a disease or a disability. It aims to assist patients in enhancing their quality of life by encouraging independence,...
2.4K
The Nucleosome Core Particle
14.1K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
14.1K
The Nucleosome Core Particle
2.2K
Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
2.2K
Non-destructive Tests for Concrete Strength
508
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it...
508
The Central Dogma
139.0K
Overview
139.0K
The Central Dogma
32.4K
The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
32.4K

