The palatal bone loss is also severe (Fig.5); PRF should cover the palatal defect following sticky bone with a hole over the abutment.  术前CT3D图像显示腭侧骨质吸收比颊侧严重，所以植骨前，将PRF膜插入腭侧龈下

Shifting     Last     Next   Guide  最好修复角度（切缘）

Xin Wei, DDS, PhD, MS 1st edition 04/29/2021, last revision 06/13/2021