牙醫學(六)（包括齒顎矯正學、兒童牙科學、牙科公共衛生學等科目及其相關臨床實例與醫學倫理）題庫下載題庫

Extruded permanent teeth (下圖) should be repositioned and splinted for 2 to 3 weeks. It normally
takes the PDL fibers this period of time to reanastomose. Extruded permanent teeth with closed
apices will undergo pulpal necrosis; therefore, root canal therapy should be initiated after the teeth
are splinted. Extruded teeth with open apices have a chance to revascularize and maintain their
vitality, so the decision to initiate therapy should be delayed until clinical or radiographic signs
indicate necrosis...

Extruded permanent teeth (下圖) should be repositioned and splinted for 2 to 3 weeks. It normally
takes the PDL fibers this period of time to reanastomose. Extruded permanent teeth with closed
apices will undergo pulpal necrosis; therefore, root canal therapy should be initiated after the teeth
are splinted. Extruded teeth with open apices have a chance to revascularize and maintain their
vitality, so the decision to initiate therapy should be delayed until clinical or radiographic signs
indicate necrosis.