密封弹性衬里材料浸入各种液体后体外硬度的变化

In vitro changes in hardness of sealed resilient lining materials on immersion in various fluids.

作者信息

Mante Francis K, Mante Mamle O, Petropolous Vicki C

机构信息

Department of Preventive and Restorative Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, USA.

出版信息

J Prosthodont. 2008 Jul;17(5):384-91. doi: 10.1111/j.1532-849X.2008.00303.x.

DOI:10.1111/j.1532-849X.2008.00303.x

PMID:18355166

Abstract

PURPOSE

During clinical use, resilient lining materials undergo changes in hardness that make them ineffective. The aims of this investigation were (1) to determine the effect of a resilient lining sealer on the hardness of four resilient denture liners; and (2) to determine the effect of the sealer on hardness after immersion in various solutions.

MATERIALS AND METHODS

Two sets of specimens of four resilient liners, Coe-comfort (CC), PermaSoft (PS), Tokuyama soft reline (TK), and Total-Soft (TS), 6-mm diameter by 4-mm thickness, were fabricated. Two coats of Permaseal, a soft reline sealant, were applied to one set of specimens of each material according to manufacturers' instructions. Sealed and unsealed samples were divided into four groups (n = 10). Each group was immersed in one of the following solutions: artificial saliva at 37 degrees C, Efferdent, Efferdent with once daily scrubbing with a soft toothbrush, and 50% ethanol. Shore A hardness numbers were obtained at 0, 1, 3, 7, 30, and 90 days. A two-way ANOVA test was performed using materials (treated and untreated) and immersion solution as independent variables. The percentage change in hardness after the 90-day immersion period was the dependent variable.

RESULTS

The results show that the application of sealant significantly improved the durability of CC, PS, and TS in immersion solutions by maintaining hardness close to preimmersion values or delaying the softening effect of the solutions. The hardness of sealed and unsealed TK showed the significantly (p < 0.05) lowest change after immersion in the test solutions. Ethanol caused the most severe decrease in hardness of all solutions, followed by saliva. Immersion in Efferdent and daily brushing after immersion in Efferdent showed only a mild effect on the hardness of the soft reline agents.

CONCLUSION

The use of a sealer can play an important role in the preservation of the hardness of some resilient lining materials.

摘要

目的

在临床使用过程中，弹性衬里材料的硬度会发生变化，从而使其失效。本研究的目的是：（1）确定一种弹性衬里密封剂对四种弹性义齿衬里硬度的影响；（2）确定密封剂在浸入各种溶液后对硬度的影响。

材料与方法

制作了四组弹性衬里的样本，分别是Coe-comfort（CC）、PermaSoft（PS）、德山软衬（TK）和Total-Soft（TS），直径6毫米，厚度4毫米。按照制造商的说明，在每种材料的一组样本上涂两层Permaseal，一种软衬密封剂。将密封和未密封的样本分为四组（n = 10）。每组样本浸入以下溶液之一：37摄氏度的人工唾液、Efferdent、每天用软牙刷刷洗一次的Efferdent以及50%乙醇。在第0、1、3、7、30和90天获取肖氏A硬度值。以材料（处理过和未处理过的）和浸入溶液作为自变量进行双向方差分析。90天浸泡期后的硬度变化百分比为因变量。

结果

结果表明，密封剂的应用通过使硬度保持接近浸泡前的值或延迟溶液的软化作用，显著提高了CC、PS和TS在浸泡溶液中的耐久性。密封和未密封的TK在浸入测试溶液后的硬度变化显著（p < 0.05）最低。乙醇导致所有溶液中硬度下降最为严重，其次是唾液。浸入Efferdent以及浸入Efferdent后每天刷牙对软衬剂硬度的影响较小。