Figure 1

Images showed the puncture approach via point “O” and TPA. The sagittal CT image (A) was showed that α and β were sagittal puncture angle of T-PKP and O-PKP, respectively. The cross-sectional CT image (B) was showed that γ and δ were transverse puncture angle of O-PKP and T-PKP, respectively. The X-ray image (C) was showed the puncture approach of O-PKP.