This study aimed to evaluate and compare the effect of reconstructed orbital fractures with computer guided Matrix Midface Orbital Plates versus Cranial Bone Grafts on the degree of post-traumatic enophthalmos and the changes in the orbital volume and examined how selection of the implant affected the development of enophthalmos or the treatment of pre-existing enophthalmos. We conducted our study on twelve cases treated with calvarial bone grafting or individually prefabricated titanium mesh implants. The features of orbital floor fractures and orbital volume (OV) changes were analyzed by a 3-dimensional medical surface rendering image software system. The difference in OV before and after surgery was significant (P < 0.05) in fresh and old fractures treated with either calvarial bone or individually designed titanium mesh. The difference in OV between unaffected and postoperatively affected sides was not significant in the group that received the individually designed titanium mesh, but was significant in the group that received calvarial bone. Spearman rank correlation analysis indicated positive correlations between enophthalmos and postoperative OV changes after implantation of cranial bone or titanium mesh. The long-term degree of enophthalmos can be predicted with 3-dimensional medical surface rendering. Individual digitally designed titanium mesh is the proper choice of implant material to recover precise OV in fresh orbital fractures.