Clinical Study On Restoration Of Jaw Bone Deformity Based On Reverse Engineering And Rapid Prototyping

Recently more and more researches have been focusing on functional surgery and functional reconstruction in Oral and Maxillofacial Surgery field. High living quality was required by patients of Dept. of Oral and Maxillofacial Surgery after the cure of the disease itself such as tumor and infection because of which mandibular bone defects and facial deformity to some extend can not be avoided. Though to some degree, mandible reconstruction has been successfully realized, the oral function and facial appearance after operation are not satisfactory usually for some reasons. It is necessary to design and manufacture individualized artificial bone substitute. However, Reverse Engineering and Rapid Prototyping technique facilitate the design and manufacturing in medical field including repairing of jaw bone deformity. The combination of CAD software and Rapid Prototyping in this field not only improves the services offered to the patients for which they can get better oral function and more satisfactory appearance, but also, to the surgeon, they can apply precise grafts in operation and their performance time will be saved with less trauma.In this study, Reverse Engineering and Rapid Prototyping techniques were used in the reconstruction of mandibular bone defects, chin augmentation as well as hemifacial atrophy cases. After the design and manufacturing of artificial substitute by the above techniques, preliminary clinical cure effectiveness was observed.1 Restoration of mandibular bone defects based on reverse engineering and rapid prototyping. Objective: To evaluate the feasibility of designing and fabricating customized titanium bone substitutes to restore mandibular bone defects using Reverse Engineering and Rapid Prototyping techniques. Methods: Titanium tray for mandibular defects were designed and fabricated through multi-step procedure of Reverse Engineering and Rapid Prototyping, then in operation it was filled with cancellous bone and fixed. Results: The bone substitutes fabricated by this method have been successfully put into clinical use for maxillofacial surgery in 3 patients and got satisfactory results. Conclusion: Reverse Engineering combining with Rapid Prototyping could accomplish the design and manufacture of implant for the restoration of mandibular bone defects.2 Customized design and manufacturing of chin augmentation implant based on Reverse Engineering and Rapid Prototyping. Objective: to present a practical and systematic method for reconstructing accurate computer and physical models of the human chin augmentation implant based on Reverse Engineering and Rapid Prototyping. Methods: The patient's CT scan data are recorded and then reformatted to make the implant design and manufacturing based on CAD modeling and Rapid Prototyping. A set of points obtained from the CT was employed to construct NURBS curves that represent the interior contours of the chin components. A NURBS surface was created from the network curve that represents the outline of the chin components interior surface which had to match with the patient's chin bone site; the exterior surface design of the chin implant was carried out by using a solids modeling software to design the implant outer surface which provided the patient with an adequate esthetic. Results: The use of reverse engineering and medical Rapid Prototyping to make individualized chin augmentation implant have shown significant results in chin augmentation. Conclusion:Compared to traditional methods, chin implants made from RE/RP have enhanced the effectiveness of chin reconstruction surgery. 3 Reverse engineering and rapid prototyping help make pre-surgical plan for hemifacial atrophy. Objective: To discuss the feasibility of manufacturing underlay for the treatment of hemifacial atrophy using reverse engineering and rapid prototyping. Methods: Skull of the patient was scanned with Picker 6000 SCT, and the data obtained were processed in Voxel Q image workstation for 3-D reconstruction with volume rendering technique. After having been...