(a) Histological examination showing dentin having torturous dentinal tubules and globular masses of dentine interrupting them (original magnification 20x). (b) Gingival biopsy examination showing odontogenic tissue in the epithelium and intramesenchymal calcifications (original magnification 20x). (c) Panoramic view showing apexification trial. (d) RCT without crowning was done for incisors and upper-right second molar. RCT with crowning was performed for upper-right second premolar and first molar and upper-left first premolar. Crowning without RCT was done for the vital upper-left premolars, left second molar, lower left second premolar, lower left second molar, lower canines, right first premolar, and upper-right first molar. (e) Final oral condition at 18 years of age.