黏固水门汀的酸溶性。

Acidic solubility of luting cements.

作者信息

Eisenburger M, Addy M, Rossbach A

机构信息

Department of Prosthetic Dentistry, Medical University of Hanover, Carl-Neuberg Strasse 1, Hanover, Germany.

出版信息

J Dent. 2003 Feb;31(2):137-42. doi: 10.1016/s0300-5712(03)00002-2.

DOI:10.1016/s0300-5712(03)00002-2

PMID:12654553

Abstract

OBJECTIVES

Chemical disintegration of luting cements can adversely affect their long term success. The aim of the present study was to assess the susceptibility of zinc phosphate cement, glass ionomer cement and resin cement to erosion at various pH values.

METHODS

Zinc phosphate and glass ionomer cement samples were eroded in 0.3% citric acid adjusted to pH 3.0, 4.0, 5.0, 6.0 and 7.0 at a temperature of 35 degrees C. A control group was stored in saline. Profilometric readings were performed after 30 min and 1h erosion time. Resin cement samples were eroded at pH 3.0 with measurements after 30 min, 6h, 24h and 7 days. A saline control group was measured after 7 days.

RESULTS

Erosion of zinc phosphate cement was significantly higher at all pH values than erosion of glass ionomer cement with erosion depth increasing with decreasing citric acid pH. No erosion was seen in the control groups. The resin cement did not show any change in surface profile after the 7 day erosion period compared to the control group. Comparison to dental tissues revealed that erosion of glass ionomer cement in vitro was slightly lower than erosion of enamel and dentine. In contrast, erosion of zinc phosphate cement was much higher.

摘要

目的

粘结水门汀的化学分解会对其长期成功率产生不利影响。本研究的目的是评估磷酸锌水门汀、玻璃离子水门汀和树脂水门汀在不同pH值下的侵蚀敏感性。

方法

将磷酸锌和玻璃离子水门汀样本在35℃温度下于pH值为3.0、4.0、5.0、6.0和7.0的0.3%柠檬酸中进行侵蚀。设立一个对照组，将样本保存在盐水中。在侵蚀30分钟和1小时后进行轮廓测量读数。树脂水门汀样本在pH值为3.0的条件下进行侵蚀，并在30分钟、6小时、24小时和7天后进行测量。在7天后对盐水对照组进行测量。