The effect of condensation pressure on selected physical properties of mineral trioxide aggregate

Abstract

Condensation pressure may affect the strength and hardness of MTA. Use of controlled condensation pressure in sample preparation for future studies is suggested.

Comparing Gray and White Mineral Trioxide Aggregate as a Repair Material for Furcation Perforation: An in Vitro Dye Extraction Study

“…Tricalcium aluminate exhibits flash setting on hydration. Tetracalcium aluminoferrite reacts at a slower rate than tricalcium aluminate [18].…”

Introduction to Mineral Trioxide Aggregate

“…ISO 9917 [55] specifies the use of cylindrical specimens with a diameter of 4 and 6 mm high for compressive strength testing. These moulds have been used in various studies investigating the compressive strength of MTA [67,88]. Other researchers have used different sized moulds (12 mm in length and 6 mm in diameter) [58].…”

“…In this standard, the compressive strength testing method is performed after 1 day, which is much too short for the original MTA products so longer times are used. The results of compressive strength of MTA and tricalcium silicate-based materials are dependent on the same factors as Portland cement [25] including the liquid to cement ratio, the shape and size of the specimen, the sample preparation, the loading rate [25,69] and condensation pressure during sample preparation [67]. When using cylindrical specimens, the flatness and parallelism of the ends are essential, otherwise the contact area between the specimen and the bearing plate is changed.…”

Composition and Setting Reaction

“…Application of a condensation pressure of 1.68 MPa results in enhanced compressive strength. Higher condensation pressures result in fewer voids and microchannels, while specimens prepared with lower condensation pressures exhibit distinctive crystalline structures [62].…”