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照射前氟化物处理对牙本质物理性能的影响。

Effect of Preirradiation Fluoride Treatment on the Physical Properties of Dentin.

作者信息

Mante Francis K, Kim Aaron, Truong Kristi N, Mittal Kriti, Alapati Spoorthi, Hagan Sarah, Deng Jie

机构信息

School of Dental Medicine, University of Pennsylvania, 240 South 40 Street, Philadelphia, PA 19104, USA.

School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA.

出版信息

Int J Dent. 2022 Mar 17;2022:3215048. doi: 10.1155/2022/3215048. eCollection 2022.

DOI:10.1155/2022/3215048
PMID:35342425
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8947862/
Abstract

OBJECTIVE

To determine the effects of preirradiation fluoride treatments on the Knoop hardness of dentin.

MATERIALS AND METHODS

Human posterior teeth mounted into acrylic resin molds were polished with silicon carbide (SiC) abrasives and 3-micron diamond paste. The Knoop hardness of dentin was measured with a Leco hardness instrument. The teeth were divided into groups of ten teeth per group as follows: no treatment (control), treatment with silver diamine fluoride (SDF), MI varnish (MI), and cavity shield (CS). The teeth were exposed to 2 Gy of daily radiation for six weeks using an X-Rad 320ix biological irradiator. Hardness was measured weekly, before, during, and after irradiation. The teeth were stored in artificial saliva at 37C between radiation treatments.

RESULTS

In preirradiation dentin, a Knoop hardness value of 58.8 (14.1) KHN was obtained. Treatment with SDF significantly increased KHN before irradiation. Immediately after radiation treatment, hardness was significantly reduced in all experimental groups. Postirradiation fluoride treatments increased the hardness of dentin to varying degrees.

CONCLUSIONS

Preirradiation fluoride treatment does not provide protection from decreases in the hardness of dentin. Treatment of teeth with fluoride formulations after radiation progressively restores the hardness of dentin to different degrees.

摘要

目的

确定照射前氟化物处理对牙本质努氏硬度的影响。

材料与方法

将人后牙安装在丙烯酸树脂模具中，用碳化硅（SiC）磨料和3微米金刚石糊剂进行抛光。用Leco硬度仪测量牙本质的努氏硬度。将牙齿分为每组十颗牙的几组，如下：未处理（对照组）、用氟化银胺（SDF）处理、用MI护齿剂（MI）处理和用窝洞保护剂（CS）处理。使用X-Rad 320ix生物辐照仪，让牙齿每天接受2 Gy的辐射，持续六周。在照射前、照射期间和照射后每周测量硬度。在两次辐射处理之间，将牙齿保存在37℃的人工唾液中。

结果

在照射前的牙本质中，获得的努氏硬度值为58.8（14.1）KHN。用SDF处理在照射前显著提高了KHN。辐射处理后立即发现，所有实验组的硬度均显著降低。照射后用氟化物处理使牙本质硬度有不同程度的提高。

结论

照射前的氟化物处理不能防止牙本质硬度下降。照射后用氟化物制剂处理牙齿可不同程度地逐步恢复牙本质硬度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d729/8947862/6d20822ef3d5/IJD2022-3215048.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d729/8947862/6d20822ef3d5/IJD2022-3215048.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d729/8947862/6d20822ef3d5/IJD2022-3215048.001.jpg

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Efficacy of Fluoride Varnishes with Added Calcium Phosphate in the Protection of the Structural and Mechanical Properties of Enamel.氟化物涂料与添加磷酸钙在保护釉质结构和机械性能方面的功效。
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