Whether in the Resurrection the Soul Will be Reunited to the Same Identical Body?
Objection 1: It would seem that the soul will not be reunited to the same identical body at the resurrection, for "thou sowest not the body that shall be, but bare grain" (1 Cor. 15:37). Now the Apostle is there comparing death to sowing and resurrection to fructifying. Therefore the same body that is laid aside in death is not resumed at the resurrection. Objection 2: Further, to every form some matter is adapted according to its condition, and likewise to every agent some instrument. Now the body …
Saint Thomas Aquinas—Summa Theologica

Whether it Will be Identically the Same Man that Shall Rise Again?
Objection 1: It would seem that it will not be identically the same man that shall rise again. For according to the Philosopher (De Gener. ii): "Whatsoever things are changed in their corruptible substance are not repeated identically." Now such is man's substance in his present state. Therefore after the change wrought by death the self-same man cannot be repeated . Objection 2: Further, where there is a distinction of human nature there is not the same identical man: wherefore Socrates and Plato …
Saint Thomas Aquinas—Summa Theologica

Whether it was Necessary for Christ to Rise Again?
Objection 1: It would seem that it was not necessary for Christ to rise again. For Damascene says (De Fide Orth. iv): "Resurrection is the rising again of an animate being, which was disintegrated and fallen." But Christ did not fall by sinning, nor was His body dissolved, as is manifest from what was stated above ([4293]Q[51], A[3]). Therefore, it does not properly belong to Him to rise again. Objection 2: Further, whoever rises again is promoted to a higher state, since to rise is to be uplifted. …
Saint Thomas Aquinas—Summa Theologica