Objective: The aim of this study was to investigate the characteristics of primary fused teeth (PFT) and their effect on permanent dentition in a group of Turkish children. Subjects and Methods: Dental records of 13,450 pediatric patients who attended the Pediatric Dental Clinic in northern Turkey between 2015 and 2017 were reviewed. Forty patients had been diagnosed with PFT and were included in the study. Clinical and radiographic examinations were conducted, and the distribution of PFT was calculated by type, sex, affected jaw, associated dental anomalies, and clinical complications. Data analysis involved descriptive statistics. Results: A total of 50 PFT were detected in the 40 patients. The mean age of patients was 6.7 ± 0.3 years (range 3–10 years). The most common PFT were the mandibular lateral incisors and canines (34, 68%). The most prevalent type of PFT was type III (20, 40%). Of the 40 patients with PFT, 34 (85%) also ex­hibited other dental anomalies such as tooth aplasia, peg-shaped incisors, talon cusps, ectopic eruption, and delayed eruption in both related and unrelated areas. The most common complications of PFT were fusion-related tooth aplasia (n = 26 [76%]) and caries formation in the affected teeth (24 [48%]). Conclusion: In this study, PFT were frequently observed in the mandibular anterior region. Caries formation and dental anomalies, especially permanent tooth aplasia, were often encountered in areas where PFT were seen. Hence, parents should be informed about possible dental problems associated with PFT and be encouraged to schedule regular follow-up appointments.

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Avulsion of permanent dentition represents a serious if relatively uncommon type of traumatic injury. The most frequent complication after replantation of teeth is ankylosis, from initial root resorption through eventual replacement of lost root substance with bone. Decoronation may be considered an alternative treatment strategy for ankylosed incisors in young patients. In the two cases reported on here, ankylosed teeth in adolescent patients were decoronated and prosthetically restored after late and less-than-ideal replantation procedures. The results obtained in these two cases are indications that decoronation may be a good treatment option for teeth affected by replacement and external resorption in young people who have not yet completed their growth and development.