God did not want to leave the material body of Jesus behind; to be used and abused. The angels came down to the burial chamber, and with the power of God, they dissolved Jesus’ physical body. When Jesus returned from His victory over Satan on Easter Sunday, the same angels helped Jesus manifest His spirit body so the disciples could see HIm. This process was not yet complete when Mary came to the tomb and it was dangerous for her to be there. This is why Jesus sent her away. His spirit body is more beautiful and that is why they did not recognize Him and how he passed through locked doors. But since the spirit bears the same injuries as the physical body, His spiritual wounds had not yet healed, and these could be seen by His disciples. (Ian Stevens and Jim Tucker have documented scientific evidence of the phenomenon of the spirit carrying injury into a new life.)
Ref: Where Reincarnation and Biology Intersect (Stevenson 1997)