1. A device for measuring the hydraulic permeability of dentin samples containing a) a flow cell containing i) an inlet channel； ii) an outlet channel hydraulically connected to the inlet channel； and iii) at least one dentin-fixing sample mechanism that is located between the inlet and outlet channels； b) a pump mechanism for pumping fluid into the flow cell through the inlet channel, through the dentin sample, and from the flow cell through the outlet channel； c) a first flow meter in contact with a fluid pumped by a pump mechanism and calibrated to measure fluid flow in the range of about 0 to about 200 ml / min； and d) a second flow meter designed to measure the flow rate of the fluid pumped by the pump mechanism and used to confirm that the flow rate of the fluid pumped by the pump mechanism is within the range determined by the calibration range from about 0 to about 200 ml / min. 2. The device according to claim 1, wherein the first flowmeter is selected from the group consisting of manual flowmeters and digital flowmeters. The apparatus of claim 2, wherein the first flowmeter is a digital flowmeter. The device according to claim 1, wherein the second flowmeter is selected from the group consisting of manual (analog) flowmeters and digital flowmeters. The apparatus of claim 4, wherein the second flowmeter is a digital flowmeter. The device according to claim 1, wherein the first flowmeter is a high-precision flowmeter. A method for measuring the hydraulic permeability of a dentin sample, comprising the following steps: A. providing a flow cell for measuring hydraulic1. Устройство для измерения гидравлической проницаемости образцов дентина, содержащееa) проточную кювету, содержащуюi) впускной канал；ii) выпускной канал, гидравлически соединенный с впускным каналом； иiii) по меньшей мере один фиксирующий образец дентина механизм, который расположен между впускным и выпускным каналами；b) насосный механизм, предназначенный для закачивания жидкости в проточную кюве
