The effect of ethylene glycol analogs on mechanical properties of moist, demineralized dentin matrix

Abstract

This study evaluated the effect of ethylene glycol analogs on the modulus of elasticity (E) and ultimate tensile strength (UTS) of moist, demineralized dentin matrix. · Six "I" beam and fifty-two hourglass shaped specimens cut from dentin discs (0.5mm thick) were demineralized in 0.5M EDT~ yielding dentin matrix specimens used to measure E and UTS, respectively A universal microtensile testing machine measured the E and UTS of specimens immersed in distilled water, ethylene glycol, 2-methoxyethanol, and ·I,2-dimethoxyethane. The E and UTS values were compared with. the Hoy's solubility parameters for hydrogen bonding (oh), polar (op), an~ dispersive forces (od) of these solvents. Analysis indicated significant (p~<0. 00 I) relationships among the solvents for both E and UTS; and that oh is the most significant (p<0.05) solubility parameter. Water (highest oh) produced the lowest E and UTS. 1,2-Dimethoxyethane (lowest oh) produced the highest E and UTS. The results support our hypothesis that E and UTS of moist, demineralized dentin is inversely proportional to oh of applied solvents.