PMC7757955_01
(a-f) Initial radiograph of alveolar socket of maxillary left central incisor (a) radiograph of mandibular right second premolar to be transplanted. One-fourth of radicular development is present (b) Radiograph after autotransplantation to the recipient alveolar socket (c) Radiograph at 4-month follow-up. Some evidence of lamina dura adjacent to root growth (arrows) (d) Radiograph at 1-year follow-up. Bone crest height is normal, root development continues, and dentin apposition in the root canal can also be seen (e) Oclusal view of the premolar. Complete eruption is expected before the crown is restored (f)
EEJ-2-28-g001.jpg
PMC7757955_01_EEJ-2-28-g001.jpg
F1
Radiographically, the alveolar socket of the maxillary left central incisor showed no remnants of root fragments, and the maxillary right central and maxillary left lateral incisors showed radiographic signs of almost complete root formation (Figure 1a). An orthodontist evaluated the case and suggested using the mandibular right second premolar, whose root was about onefourth formed (Figure 1b). The tooth was kept out of occlusion to allow for radicular growth (Figure 1c). Figure 1d-e shows the root development during the first year. The premolar crown was maintained intact until root formation and eruption were complete (Figure 1f).
(a-c) 2 years 3-months follow-up. Radiographically, there is absence of periodontal or periapical pathosis, but presence of lamina dura and hard tissue formation in the root canal (a) 2 years 3-months follow-up. Clinical picture with a ceramic restoration. Papilla and periodontal tissues look healthy (b) 4-year follow-up. Radiographically, periradicular tissues are normal and show no signs of inflammatory external root resorption. Hard tissue apposition seems to continue in the root canal space, which usually indicates vital tissue in the root canal (c)
EEJ-2-28-g002.jpg
PMC7757955_01_EEJ-2-28-g002.jpg
F2
There were no signs of periradicular or periodontal disease (Figure 2a). The appearance of the tooth was restored with a ceramic crown (Figure 2b).
(a, b) 18-year follow-up. Patient has undertaken orthodontic treatment, and the transplanted tooth has been moved without damage to the periodontal tissues (a) Radiographically, there is no periradicular pathosis, the periodontal ligament space has normal width, and there are no signs of inflammatory external root resorption (b)
EEJ-2-28-g004.jpg
PMC7757955_01_EEJ-2-28-g004.jpg
F4
Radiographically, there appeared to be hard tissue deposition in the root canal such that the canal lumen seemed to be almost completely obliterated; however, the tooth and periodontal tissues were clinically normal (Figure 4a-b).