Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Porosity in Cement Paste01:18

Porosity in Cement Paste

424
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...
424
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

356
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
356
Finishing Concrete01:18

Finishing Concrete

307
Concrete finishing starts immediately after the concrete has been placed and consolidated. The initial step, screeding, involves leveling the concrete surface by removing excess material to flush it with the formwork's top. Following this, bull float or darby are employed to smooth the surface further, effectively lower high spots, fill low areas, and ensure larger aggregate particles are embedded within the concrete. This preparation is critical before the appearance of bleed water, as its...
307
Accelerated Curing of Concrete01:25

Accelerated Curing of Concrete

434
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
434
Pumped Concrete01:13

Pumped Concrete

342
Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
342
Composite Masonry Walls01:18

Composite Masonry Walls

1.6K
Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
1.6K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Understanding Vaccine Hesitancy in Louisiana Through Social Media Listening and Community Feedback: Cross-Sectional Study.

JMIR infodemiology·2026
Same author

Detection of Implant Brands Using Artificial Intelligence and Deep Learning Modeling Based on Orthopantomogram Images: A Review of the Literature.

Journal of long-term effects of medical implants·2026
Same author

Impact of Community-Based Oral Health Education Programs on Dental Caries Prevalence in School-Aged Children.

Journal of pharmacy & bioallied sciences·2025
Same author

Incidence Prevalence Impact and Outcomes of Iron Deficiency Anemia in Pregnant Women: A Prospective Study.

Journal of pharmacy & bioallied sciences·2025
Same author

Burnout rate among dental professionals post COVID-19 at one academic dental institution.

BMC medical education·2025
Same author

Assessment of Oral Health Disparities and Barriers to Care among Underserved Populations in Urban and Rural Settings.

Journal of pharmacy & bioallied sciences·2025

相关实验视频

Updated: Jan 11, 2026

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
05:30

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials

Published on: January 10, 2025

1.0K

重复使用印象复制件

Saeid Saeidyan1, Sahithya Sakhamuri2, Ashley Tai2

  • 1*Department of Preventive and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA.

Journal of long-term effects of medical implants
|November 10, 2025
PubMed
概括

重复使用一次性牙植入器组件,如印记复合器,可以降低成本和浪费. 然而,关于重复使用这些部件的临床成功,安全性和准确性的证据仍然是混合的,需要仔细考虑.

更多相关视频

Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins
03:02

Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins

Published on: January 17, 2025

924
Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry
08:47

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry

Published on: February 2, 2018

12.6K

相关实验视频

Last Updated: Jan 11, 2026

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
05:30

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials

Published on: January 10, 2025

1.0K
Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins
03:02

Impact of Fabrication Techniques and Polishing Procedures on Surface Roughness of Denture Base Resins

Published on: January 17, 2025

924
Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry
08:47

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry

Published on: February 2, 2018

12.6K

科学领域:

  • 牙科植入物学 牙科植入物学
  • 生物材料科学 生物材料科学
  • 恢复性牙科 恢复性牙科

背景情况:

  • 植入物组件成本的上升需要在牙科实践中探索节省成本的策略.
  • 传统的一次性使用组件 (印记,愈合支柱,盖面螺丝) 对于植入器的准确性和患者安全至关重要.
  • 可持续性和减少浪费在现代牙科中越来越关注.

研究的目的:

  • 系统地审查有关一次性使用牙科植入物组件的再利用的文献.
  • 评估重复使用这些组件的生物安全性,机械完整性,准确性,成本效益和可持续性.
  • 提供基于证据的评估,对重复使用印记,愈合支柱和覆盖螺丝的可行性进行评估.

主要方法:

  • 在PubMed数据库中对过去十年出版物的系统审查.
  • 分析的重点是回归化疗效,重复使用的准确性,以及报告的生物或机械后果.
  • 在最初审查的30篇文章中,包含了17篇符合特定标准的文章.

主要成果:

  • 调查结果提供了关于牙科植入物组件再利用临床成功率和安全性的混合证据.
  • 值得注意的考虑因素包括这种做法的实际成本效益和长期可持续性.
  • 观察到灭菌效率的变化和对机械完整性的潜在影响.

结论:

  • 重复使用一次性牙科植入物组件在潜在的成本节约和未解决的安全性和有效性问题之间呈现出复杂的平衡.
  • 需要进一步的研究,以确定安全和有效的重复使用这些关键组件的最终指南.
  • 在采用再利用协议之前,临床医生必须权衡当前关于可行性,成本效益和可持续性的证据.