The surgical operation for treatment of such bone defects is not standardized. There are no specific criteria for determining the amount of bone graft, location of bone graft, appropriate treatment for the bone defect area, design of donor bone morphology, and postoperative prediction of free bone resorption. At present, the main treatment for severe bone defects is onlay bone grafting with autologous bone. This has always been challenging in clinical implant restorations, especially in cases of severe bone loss further, the treatment options for such cases are limited. Implant restoration in the aesthetic zone of the anterior teeth should be performed considering the aesthetic effect of the proportion of the pink (gingiva) and white (teeth) regions, in addition to ensuring that the biting and cutting functions are maintained. Use of computer-aided design and a 3D-printed template can be an effective approach for accurate bone augmentation in the aesthetic zone of the anterior teeth. The amount of bone graft resorbed was within the acceptable range three months after the operation, and the effect of implant restoration was satisfactory. The position of the bone graft was consistent with the preoperative design. Reexamination was conducted to evaluate the position of the bone graft immediately after the operation and the resorbed capacity of the bone graft before implant restoration. A 3D-printed template was prepared to guide the accurate placement of the bone graft. The position parameters and osteotomy line of the free bone were determined via virtual surgery. The design of the osteotomy line in the bone defect area was determined under computer simulation. Ten patients with severe bone defects in the aesthetic zone of anterior teeth were included in the study CT data were collected before surgery. To explore the outcomes of bone augmentation in the aesthetic zone of the anterior teeth using computer-aided design and a 3D-printed template.
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