使用聚乙烯硅氧烷压模监测未抛光牙釉质上低于5 μm的牙齿侵蚀磨损。

IF 4.3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Prosthetic Dentistry Pub Date : 2025-02-01 DOI:10.1016/j.prosdent.2023.04.020

Sagar P. Jadeja BDS , Rupert S. Austin BDS, PhD, FDS, RCS, MClin Dent M Prostho , David W. Bartlett BDS, PhD, FDS, RCS, MRD

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引用次数: 0

摘要

问题陈述:目前尚不清楚聚乙烯醇硅氧烷印模是否能够在自然自由牙釉质上重现5 μm的变化，以及是否有可能实现与牙齿或材料磨损一致的早期表面变化的临床测量。目的:本体外研究的目的是利用轮廓术、叠加和表面减法软件程序，研究并比较聚氯乙烯硅氧烷复制品与直接测量未抛光人牙釉质病变的亚5 μm病变。材料和方法:将20个经伦理批准的未经抛光的人类牙釉质样本随机分配到先前报道的循环侵蚀(n=10)和侵蚀磨损(n=10)模型中，以在表面产生离散的5 μm以下病变。在每个循环前后分别制作低粘度聚乙烯醇硅氧烷印模，用非接触式激光轮廓术扫描，用数字显微镜观察，并与直接扫描牙釉质表面进行比较。然后通过表面配准和减法工作流程对数字地图进行询问，通过步高和数字表面显微镜测量粗糙度来推断未抛光表面的牙釉质损失。结果:直接测量牙釉质的化学损失为3.4±0.43 μm，聚乙烯醇硅氧烷复制品的化学损失为3.20±0.42 μm。化学和机械损失的直接测量值分别为6.12±1.05 μm和5.79±1.06 μm (P=.211)。直接测量和聚氯乙烯硅氧烷复制测量之间的总体精度为0.13 +0.57和-0.31 μm，侵蚀和磨损为0.12 +0.99和-0.75 μm。表面粗糙度和数字显微镜可视化提供了验证数据。结论:未抛光人牙釉质的聚氯乙烯硅氧烷复制印模在5 μm以下的水平上是准确和精确的。

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Use of polyvinyl siloxane impressions to monitor sub-5-μm erosive tooth wear on unpolished enamel

Statement of problem

Whether polyvinyl siloxane impressions are capable of reproducing 5-μm changes on natural freeform enamel and potentially enabling clinical measurements of early surface changes consistent with wear of teeth or materials is unclear.

Purpose

The purpose of this in vitro study was to investigate and compare polyvinyl siloxane replicas with direct measurements of sub-5-μm lesions on unpolished human enamel lesions by using profilometry, superimposition, and a surface subtraction software program.

Material and methods

Twenty ethically approved unpolished human enamel specimens were randomized to a previously reported cyclic erosion (n=10) and erosion and abrasion (n=10) model to create discrete sub-5-μm lesions on the surface. Low viscosity polyvinyl siloxane impressions were made of each specimen before and after each cycle and scanned by using noncontacting laser profilometry and viewed with a digital microscopy and compared with direct scanning of the enamel surface. The digital maps were then interrogated with surface- registration and subtraction workflows to extrapolate enamel loss from the unpolished surfaces by using step-height and digital surface microscopy to measure roughness.

Results

Direct measurement revealed chemical loss of enamel at 3.4 ±0.43 μm, and the polyvinyl siloxane replicas were 3.20 ±0.42 μm, respectively. For chemical and mechanical loss direct measurement was 6.12 ±1.05 μm and 5.79 ±1.06 μm for the polyvinyl siloxane replica (P=.211). The overall accuracy between direct and polyvinyl siloxane replica measurements was 0.13 +0.57 and −0.31 μm for erosion and 0.12 +0.99 and −0.75 μm for erosion and abrasion. Surface roughness and visualization with digital microscopy provided confirmatory data.

Conclusions

Polyvinyl siloxane replica impressions from unpolished human enamel were accurate and precise at the sub-5-μm level.

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来源期刊

Journal of Prosthetic Dentistry 医学-牙科与口腔外科

CiteScore

7.00

自引率

13.00%

发文量

599

审稿时长

69 days

期刊介绍： The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.