PI CHUAN HSU2020-01-092020-01-092015https://scholars.lib.ntu.edu.tw/handle/123456789/446852[SDGs]SDG3Maxillary Anterior Implants Replacement Following Ridge Augmentation Using a Xenogenous Bone Block at a Previously Failed Site: A Case Reportjournal article10.6121/TAP.2015.20.1.05