A tool for applying a correction on a resection margin of a tissue block having an outer surface, in order to align the resection margin with the cutting plane of a microtome, the correction being determined using an embedding block (28, 82) having been cut by the microtome so as to define a cut face, the tool comprising: - a base; - a chuck receiver operatively mounted to the base for receiving a chuck having a top surface for supporting the embedding block or the tissue block; and - a positioning assembly comprising a movable plate having a flat surface, the movable plate being configured so that its flat surface can be pressed on the cut face of the embedding block or on the outer surface of the tissue block when the chuck supporting the embedding block or the tissue block is mounted to the base; characterized in that the tool further comprises - a bi-axial pivoting assembly operatively connected to one of the chuck receiver and the positioning assembly, the movable plate of the positioning assembly and the chuck receiver being movable one relative to the other for pressing the embedding block between said flat surface of the movable plate of the positioning assembly and said top surface of the chuck when the chuck supporting the embedding block is mounted to the base thereby tilting the bi-axial pivoting assembly according to a compensating angle indicative of the correction to make, the compensating angle corresponding to the angle between the top surface of the chuck and the cutting plane of the microtome; and - a locking mechanism configured to lock the bi-axial pivoting assembly in a complementing position in which the flat surface of the movable plate is pressed on the cut face of the embedding block when the chuck supporting the embedding block is mounted to the base, the locking mechanism being configured so that, when the chuck supporting the tissue block is mounted to the base, the bi-axial pivoting assembly being locked in the complementing position, the flat surface of the positioning assembly is pressed on the resection margin of the tissue block, thereby remodelling the tissue block such that the angle defined by the corrected resection margin of the tissue block and the top surface of the chunk corresponds to the compensating angle. - a base; - a chuck receiver operatively mounted to the base for receiving a chuck having a top surface for supporting the embedding block or the tissue block; and - a positioning assembly comprising a movable plate having a flat surface, the movable plate being configured so that its flat surface can be pressed on the cut face of the embedding block or on the outer surface of the tissue block when the chuck supporting the embedding block or the tissue block is mounted to the base; characterized in that the tool further comprises - a bi-axial pivoting assembly operatively connected to one of the chuck receiver and the positioning assembly, the movable plate of the positioning assembly and the chuck receiver being movable one relative to the other for pressing the embedding block between said flat surface of the movable plate of the positioning assembly and said top surface of the chuck when the chuck supporting the embedding block is mounted to the base thereby tilting the bi-axial pivoting assembly according to a compensating angle indicative of the correction to make, the compensating angle corresponding to the angle between the top surface of the chuck and the cutting plane of the microtome; and - a locking mechanism configured to lock the bi-axial pivoting assembly in a complementing position in which the flat surface of the movable plate is pressed on the cut face of the embedding block when the chuck supporting the embedding block is mounted to the base, the locking mechanism being configured so that, when the chuck supporting the tissue block is mounted to the base, the bi-axial pivoting assembly being locked in the complementing position, the flat surface of the positioning assembly is pressed on the resection margin of the tissue block, thereby remodelling the tissue block such that the angle defined by the corrected resection margin of the tissue block and the top surface of the chunk corresponds to the compensating angle.