相关实验视频

Updated: May 13, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

Published on: July 21, 2014

微硬度和聚合缩小的比较评价在残留的强化临时修复:一个体外研究

Himaja Naina¹, Vidyashree V Nandini¹, Dilip M Kumar¹

¹Prosthodontics, Sri Ramaswamy Memorial (SRM) Kattankulathur Dental College and Hospital, Chengalpattu, IND.

|August 20, 2024

概括

将粉添加到聚甲基甲酸 (PMMA) 中显著提高了微硬度,并减少了临时修复中的聚合收缩. 热激活的PMMA与合金显示出最佳性能,提供卓越的性能和可持续材料再利用的潜力.

科学领域:

材料科学材料科学材料科学
生物材料工程生物材料工程
牙科材料牙科材料

背景情况:

聚甲基甲酸 (PMMA) 广泛用于牙科的临时修复.
提高PMMA的机械性能和最大限度地减少聚合物收缩对于改善恢复寿命和适应性至关重要.
剩余的,通常是CAD/CAM工艺的副产品,为可持续的材料增强提供了机会.

研究的目的:

为了评估和比较PMMA的微硬度和聚合收缩强化与残留粉.
评估将粉加入到自聚合和热聚合烯酸树脂中的效果.
确定最佳配方,以改善临时牙科修复中的材料性能.

主要方法:

在两个维度中制造360个PMMA树脂样本.
在180个样本中加入40%的重量齐尔科尼亚粉尘.
分类为四组:自聚合 (A),热聚合 (H),自聚合与 (ZA),热聚合与 (ZH). 每组测量了微硬度和聚合收缩率.

主要成果:

组ZH (用的热聚合) 呈现出最高的微硬度 (6.06 ± 0.31 GPa) 和最低的收缩率 (52.11 ± 3.21 mm3).
在自聚合组 (ZA: 73.93 ± 3.55 mm3 vs. A: 91.9 ± 6.38 mm3) 和热聚合组 (ZH: 52.11 ± 3.21 mm3 vs. H: 66.71 ± 5.97 mm3) 中,添加石减少了收缩.
微硬度在添加基时显著增加 (ZA与A),尽管纯热聚合树脂 (H) 的硬度比ZA更高.

结论:

在临时修复中将粉加入PMMA中,增加了硬度并减少了聚合缩水.
与热激活的PMMA与粉尘显示出优越的微硬度和减少收缩与其他测试组相比.
利用回收的CAD/CAM粉末废弃物在牙科材料制造中提供经济和环境可持续性的好处.

关键词:

卡德-卡姆剩余的残留物在CAD-CAM废弃物中.绿色牙科绿色牙科磨粉粉尘的磨粉粉尘的磨粉粉尘剩余的锡尔科尼亚.

更多相关视频

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

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

Published on: January 10, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

相关概念视频

Long-patch Base Excision Repair

Long-patch Base Excision Repair

Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:

Toughness and Hardness of Aggregate

Toughness and Hardness of Aggregate

Toughness and hardness are critical properties of aggregate materials used in concrete, particularly on pavement surfaces and industrial flooring subjected to heavy loads. Toughness is defined as the aggregate's resistance to failure by impact and is measured by the aggregate impact value (AIV). For this, the aggregate impact value test is performed, wherein the impact is delivered by a standard hammer, which falls freely under its own weight onto the aggregates. The aggregates fragment in the...

Microcracking in Concrete

Microcracking in Concrete

Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...