概括
与办公室治疗相比,在家白化提供更低的牙敏感度强度和更大的颜色变化 (ΔE). 然而,敏感性风险和整体漂白效率 (ΔSGU) 在方法之间没有显著差异,低质量的证据支持这些发现.
科学领域:
- 牙科的美学 牙科的美学
- 基于证据的牙科.
背景情况:
- 牙漂白是一种常见的美容牙科手术.
- 家庭和办公室的漂白方法都被广泛使用.
- 之前的审查已经比较了这些技术,需要更新新证据.
研究的目的:
- 系统地审查和分析家庭与办公室美白牙敏感性的疗效,风险和强度.
- 更新现有的系统审查数据与最近的随机临床试验.
主要方法:
- 在多个数据库 (MEDLINE,EMBASE,Cochrane Library) 和手动搜索中进行了全面的文献搜索.
- 包括随机临床试验,比较成人患者的家庭和办公室漂白.
- 提取了数据,评估了偏差风险,并使用标准化平均差异 (SMD) 和相对风险 (RR) 进行了元分析.
主要成果:
- 在家用漂白表明牙敏感度强度显著降低 (SMD -0.78;p=0.04) 和 ΔE 颜色变化更大 (SMD 0.49;p=0.006).
- 在 ΔSGU 的牙敏感性风险 (RR 0.82; p=0.19) 或漂白效率 (SMD 0.04; p=0.68) 中没有发现显著差异.
- 总共有32项研究被纳入定性分析,其中23项用于元分析.
结论:
- 在家用漂白可以在降低灵敏度强度和改善颜色变化 (ΔE) 中提供优势.
- 用 ΔSGU 测量的牙敏感性风险和漂白效率在两种方法之间没有显著差异.
- 支持这些发现的证据的整体质量被认为是低的.
相关概念视频
01:18Effects of EDTA on End-Point Detection Methods
Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a result, EDTA...
01:19Quality Assurance
Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
01:10Qualitative Analysis
Qualitative analysis is the process of identifying elements, ions, or compounds in an unknown sample. It is the first and most fundamental type of analysis based on the hierarchy of analytical goals. This hierarchy is significant as it provides a structured approach to scientific research, with qualitative analysis serving as the initial step, providing essential information before moving on to quantitative or other forms of analysis.
There are two main approaches to qualitative analysis:...
There are two main approaches to qualitative analysis:...
00:56Blank Solutions
A blank solution is a solution that does not contain the analyte, or the substance of interest being tested or measured. It is typically prepared using the same reagents and procedure as the sample solution but without adding the analyte. The primary purpose of preparing a blank solution is to account for any background interference or contamination that may affect the accuracy and reliability of the analytical method.
In some experimental cases, the reagents, solvents, or lab equipment used in...
In some experimental cases, the reagents, solvents, or lab equipment used in...