Fig. (1) Root resorption classification score according to Malmgren [17]. Degree 0 - absence of resorption; Degree 1 - irregularity in the apical root contour; Degree 2 – resorption of up to 2 mm; Degree 3 – resorption from 2 mm up to 1/3 of the root; Degree 4 - loss greater than 1/3 of the root length.

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