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一项评估冷灭菌过程中弹性体尺寸变化影响的体外研究。

An in vitro study to evaluate the effect on dimensional changes of elastomers during cold sterilization.

作者信息

Khinnavar Poonam K, Kumar B H Dhanya, Nandeeshwar D B

机构信息

Department of Prosthodontics, Bapuji Dental College and Hospital, Davangere, Karnataka, India.

出版信息

J Indian Prosthodont Soc. 2015 Apr-Jun;15(2):131-7. doi: 10.4103/0972-4052.155034.

DOI:10.4103/0972-4052.155034
PMID:26929499
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4762316/
Abstract

OBJECTIVES

This study was planned to evaluate the dimensional stability of elastomers during cold sterilization or immersion disinfection and also to evaluate the same, along with acrylic resin trays which are used in clinical practice.

MATERIALS AND METHODS

A study mold according to revised American Dental Association. Specification no. 19 was used. Polyether, polyvinyl siloxane (PVS) (heavy body), PVS (regular body) and Hydrophilic addition reaction silicon (medium body) were selected for study. 2% glutaraldehyde and 0.525% sodium hypochlorite were the disinfectants used. The study was divided into group-I and group-II. In group-I study, 24 specimens of each impression material were prepared. Eight immersed in 2% glutaraldehyde, eight in 0.525% sodium hypochlorite and rest eight allowed to dry bench cure. After 16 h, the specimens measured under Leica WILD stereomicroscope and dimensions compared with master die. In group II study, 24 specimens of the material with the least dimensional changes were prepared and adhered to 24 acrylic resin disks using tray adhesive. Same immersion procedure was followed as in group I. The data were analyzed by one-way ANOVA and Tukey's multiple tests.

RESULTS

Of four impression materials used, PVS (heavy body) was the most dimensionally stable, and Polyether was the least dimensionally stable in both the groups.

INTERPRETATION AND CONCLUSION

Within the limitation of the study, PVS (heavy body) was most stable, and polyether was least stable of all the impression materials.

摘要

目的

本研究旨在评估弹性体在冷灭菌或浸泡消毒过程中的尺寸稳定性，并与临床实践中使用的丙烯酸树脂托盘一起进行评估。

材料与方法

使用根据美国牙科协会修订版规范19制作的研究模具。选择聚醚、聚乙烯基硅氧烷（PVS）（重体）、PVS（常规体）和亲水加成反应硅橡胶（中体）进行研究。使用的消毒剂为2%戊二醛和0.525%次氯酸钠。研究分为I组和II组。在I组研究中，每种印模材料制备24个样本。8个样本浸泡在2%戊二醛中，8个样本浸泡在0.525%次氯酸钠中，其余8个样本在实验台上晾干固化。16小时后，在徕卡WILD立体显微镜下测量样本，并与主模型进行尺寸比较。在II组研究中，制备24个尺寸变化最小的材料样本，并使用托盘粘合剂将其粘贴到24个丙烯酸树脂盘上。遵循与I组相同的浸泡程序。数据采用单因素方差分析和Tukey多重检验进行分析。

结果

在使用 的四种印模材料中，PVS（重体）在两组中尺寸稳定性最高，聚醚尺寸稳定性最低。

解读与结论

在本研究的局限性内，PVS（重体）是所有印模材料中最稳定的，聚醚是最不稳定的。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/837e0bb83ebc/JIPS-15-131-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/54faf319347d/JIPS-15-131-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/985ce7e4debc/JIPS-15-131-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/9b4b634d7447/JIPS-15-131-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/c81f152dc0a6/JIPS-15-131-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/d63a8bbf5123/JIPS-15-131-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/a6795a53417c/JIPS-15-131-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/90e4277d4037/JIPS-15-131-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/837e0bb83ebc/JIPS-15-131-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/54faf319347d/JIPS-15-131-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/985ce7e4debc/JIPS-15-131-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/9b4b634d7447/JIPS-15-131-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/c81f152dc0a6/JIPS-15-131-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/d63a8bbf5123/JIPS-15-131-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/a6795a53417c/JIPS-15-131-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/90e4277d4037/JIPS-15-131-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7bb2/4762316/837e0bb83ebc/JIPS-15-131-g009.jpg

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