BACKGROUND In the clinical scenario, adult patients with periodontal diseases and dental malformation, characterized by dental crowding in lower anterior teeth with the thin biotype, often require orthodontic treatment. This case report aimed to evaluate the clinical and radiographic outcomes of periodontally accelerated osteogenic orthodontics（PAOO） combined with autologous platelet-rich fibrin（PRF） in an adult patient with class I malocclusion along with dental crowding, a thin periodontal biotype, and buccal plate deficiency.CASE SUMMARY A 32-year-old female complaining of dental crowding and gingival bleeding was referred to the orthodontic clinic. The patient underwent periodontal risk assessment prior to orthodontic treatment. She was diagnosed with a high risk of gingival recession due to dental crowding, root prominence, loss of buccal plates, and a thin gingival tissue biotype. The treatment regimen included PAOO combined with autologous PRF for alveolar augmentation and interproximal enamel reduction for moderate dental crowding. Clinically, PAOO-assisted orthodontic tooth movement in this case showed enhanced periodontium remodeling. Radiographic outcomes also showed statistically significant improvements（P < 0.01） in the mandibular buccal alveolar bone.CONCLUSION This case report suggests the combination of autologous PRF with PAOO to enhance bone augmentation and long-term tissue support in adult orthodontic patients with periodontal disease.

BACKGROUND In the clinical scenario,adult patients with periodontal diseases and dental malformation,characterized by dental crowding in lower anterior teeth with the thin biotype,often require orthodontic treatment.This case report aimed to evaluate the clinical and radiographic outcomes of periodontally accelerated osteogenic orthodontics(PAOO)combined with autologous platelet-rich fibrin(PRF)in an adult patient with class I malocclusion along with dental crowding,a thin periodontal biotype,and buccal plate deficiency.CASE SUMMARY A 32-year-old female complaining of dental crowding and gingival bleeding was referred to the orthodontic clinic.The patient underwent periodontal risk assessment prior to orthodontic treatment.She was diagnosed with a high risk of gingival recession due to dental crowding,root prominence,loss of buccal plates,and a thin gingival tissue biotype.The treatment regimen included PAOO combined with autologous PRF for alveolar augmentation and interproximal enamel reduction for moderate dental crowding.Clinically,PAOO-assisted orthodontic tooth movement in this case showed enhanced periodontium remodeling.Radiographic outcomes also showed statistically significant improvements(P<0.01)in the mandibular buccal alveolar bone.CONCLUSION This case report suggests the combination of autologous PRF with PAOO to enhance bone augmentation and long-term tissue support in adult orthodontic patients with periodontal disease.

Abstract A series of Dy 3+ and/or Eu 3+ doped Mg 2 Al 4 Si 5 O 18 phosphors were synthesized by a solid state reaction. The phase, microstructure and luminescent properties of the phosphors were investigated. The XRD patterns and SEM images show that the doping ions have no influence on the phase and microstructure of the phosphors. The Dy 3+ or Eu 3+ singly doped Mg 2 Al 4 Si 5 O 18 phosphors respectively show emission bands of Dy 3+ or Eu 3+ ions. Based on the overlap between the emission spectrum of Mg 2 Al 4 Si 5 O 18 :Dy 3+ with the excitation spectrum of Mg 2 Al 4 Si 5 O 18 :Eu 3+ , we speculated the possible energy transfer from Dy 3+ to Eu 3+ in Mg 2 Al 4 Si 5 O 18 :Dy 3+ /Eu 3+ phosphors, which is confirmed by the decreases of Dy 3+ emission intensity with the increasing Eu 3+ concentrations. The decreases of decay time of Dy 3+ emission gave the further evidence to the energy transfer from Dy 3+ to Eu 3+ . The energy transfer efficiency increases from 7.35% to 62.41% when the codoped Eu 3+ concentration increases from 1 mol% to 6 mol%. Graphical abstractfx1