[Application of computer aided design-computer aided manufacture technique in mandible defect reconstruction with individual titanium prosthesis].

Objective: To investigate the application of computer aided design-computer aided manufacture (CAD-CAM) technique in the reconstruction of mandible defect with individual titanium prosthesis.

Methods: Six patients with large mandibular ramus and angle tumor were spiral CT scanned preoperatively, and the CAD-CAM was used to design and make individual titanium prosthesis for reconstructing the mandibular defects after resection of the tumor. The prosthesis were assembled during operation.

[Application of three dimensional model in evaluating the effect of artificial bone implantation of hard cleft palate on the development of maxilla].

Objective: To observe the effect of artificial bone implantation of hard cleft palate on the development of maxilla.

Methods: From January 1997 to December 1999, 40 patients with hard cleft palate were randomly divided into two groups: control group and implantation group (n = 20 each). The patients in the implantation group received an implantation of compound artificial bone of HA-Bone cement.

[Application of lateral lag screw with sagittal condylar fracture and management of articular disk].

Objective: To evaluate the application of lateral lag screw and reduction of articular disk in management of intracapsular sagittle fractures of the condylar process.

Methods: The study group consisted of 16 cases (19 joints), including 10 males (12 joints) and 6 females (7 joints). Condylar sagittal fracture and displaced articular disk were detected in all patients.

[Double-step distraction osteogenesis in the reconstruction of unilateral mandibular segmental defects after tumor resection].

Objective: To investigate the application of double-step distraction osteogenesis in the reconstruction of mandibular segmental defects after tumor resection.

Methods: From January 2002 to December 2006, six cases of post-tumor unilateral mandibular segmental defects were reconstructed using distraction osteogenesis. The mandibular body was lengthened first, following by mandibular ramus distraction.

[Reconstruction of maxillary defect by prefabricated titanium mesh combined with pedicled buccal fat pad flap and bone autograft].

Objective: To introduce individualized 3-dimensional (3-D) reconstruction of maxillary defect by prefabricated titanium mesh combined with pedicled buccal fat pad flap (PBFPF) and bone autograft.

Methods: Since May, 2001, 16 patients with maxillary defect resulted from tumor or trauma were treated. The 3-D models were created through 3-D CT and rapid prototype technique.

[Application of computer aided design/computer aided manufactured techniques in mandible defect reconstruction].

Objective: To investigate the application of CAD/CAM technique in reconstruction of mandible defect.

Methods: Before surgery, three-dimensional computed tomography was performed in 23 patients with mandible lesions, then the CT data were transformed into a readable format to produce facsimile models by using rapid prototyping (RP) techniques. When individual mandibular models were produced, evaluation and surgical simulation were performed on the model, which included measuring range of mandible lesions, prefabrication of mandibular reconstructive titanium plates or distractors, ascertaining precise position of transport disk, and shaping the free vascularized fibula, etc.

[The application of three dimensional craniomaxillofacial model in the restoration of mandibular bone defects with vascularized fibular autograft].

Objective: To evaluate the effect of applying the three dimensional craniomaxillofacial model technique in the restoration of mandibular defects with vascularized fibular autograft.

Methods: Three dimensional craniomaxillofacial models of 24 patients with mandibular defects were achieved by CT scan and rapid prototype technique. Surgery simulation and individual prefabricated titanium board were designed on the models.

[The effect of artificial bone implantation in cleft palate on the development of maxilla].

Objective: To research the influence of palate bone implantation to the growth of maxilla in three dimensional direction.

Methods: 40 patients of congenital cleft palate type II with palate board damage were stochastically divide into the comparison group and bone planted group. In bone planted group, HA-Bone cement was used to repair palate tabular damage.