This case study aimed to manage post-orthodontic extensive root canal calcification and crown white-spot-lesions using the resin infiltration technique. After undergoing orthodontic treatment with fixed appliances, a 22-year-old male patient arrived at the clinic complaining of discomfort and aesthetic dissatisfaction. According to the patient, he received orthodontic therapy for approximately four years. Clinically, the patient had mild to severe post-orthodontic white spot lesions (WSL) on both upper central incisors. In contrast to the neighboring teeth, tooth #21 had a yellowish hue. In addition to being percussion-sensitive, tooth #21 did not react to either heat or electric pulp testing (EPT). An orthopantomogram (OPG) and CBCT showed that tooth #21 had significant root canal calcification, although the lamina dura was intact and the periodontal ligament space was normal. Root canal therapy was performed on tooth #21, followed by internal bleaching with 35% hydrogen peroxide (non-vital walking bleaching). The esthetic effect was then improved by treating both teeth with white spot lesions with the resin infiltration procedure. Comprehending patient expectations, completing complete evaluations, assuring informed decision-making, and tailoring treatment programs might all lead to the greatest results.
