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10 cases, 3D printed surgical templates were printed according to the preoperative digital design. For the third part, patient-specific maxillofacial implant were printed using 3D printing technique in three cases. All of the free flaps were survived and the final reconstructed results were satisfied in all patients. Conclusion: 3D printing technique had promising implication in oral and maxillofacial reconstruction. Preoperative rapid prototyping 3D printing model could be used to predict the extension of defects, simulate the reconstruction operation and prefabricated titanium mesh or plate. 3D printed surgical template was helpful for the accurate implementation of surgical plan.3D printing patient-specific implants were very useful to reconstruct complex 3 dimensional defects and obtain the best reconstructive result. http://dx.Background: Dry eye syndrome is a common disease that results in possible damages of the ocular surface, or even in visual disturbance. Microvascular autologous submandibular gland (SMG) transfer provides a continuous and seromucinous tear substitution by salivary secretion. It is an effective treatment for severe keratoconjunctivitis sicca. This study was designed to investigate the long-term results of SMG transplantation and the ocular surface improvement. Methods: From February 2001 to December 2015, 55 patients (58 eyes) with severe dry eye syndrome were treated by SMG transfer. The transplantations were successful in 53 cases (56 eyes). Postoperative scintigraphy, Schirmer's test, breakup time, corneal staining and management of complications were performed to compare with 27 eyes without SMG transplantation. The mean follow-up time was 48 months. Results: Long-term follow-up reveals that SMG transplantation is an effective solution for patients with severe dry eye syndrome. The discomfort symptoms were relieved, and the frequency of use of pharmaceutical tear substitutes was reduced (90.91%). 34% of the patients (17/50) suffer from epiphora, which were modified by reduction surgery. Objective examination showed significant improvement in tear film and some features of ocular surface (P < 0.05). Visual acuity improved in 13/50 patients. Conclusion: Submandibular gland transfer in most patients achieved long-term relief from discomfort and stabilisation of the ocular surface. The function proven clinically and biochemically was stable for many years after surgery. Nearly 26% of the patients were improved in vision acuity with mile damage of the ocular surface.http://dx. Background:Computer-aided technique has being increasingly applied to maxillofacial surgery. In this paper, we present our experience in jaw reconstruction with fibula flap. Objective: To review the clinical cases and experience of computer-aided surgery technique in jaw reconstruction with vascularised fibula flap from 2005 to 2015. Methods: There were 42 patients who underwent jaw reconstruction using vascularised fibula flap at the Department of Oral and Maxillofacial Surgery, Peking Union Medical College Hospit...

Objective: To assess the application of computer-assisted surgical navigation in condylectomy via intraoral approach through coronoid process osteotomy and its clinical results. Methods: Between May 2011 and July 2016, 46 patients were treated by condylectomy via intraoral approach through coronoid process osteotomy under computer-assisted surgical navigation. The age of the patients ranged from 16 years to 57 years. 21 patients had condyle osteoma and 25 patients had hemimandibular hyperplasia and condylar hyperplasia. Most patients had concomitant Le Fort I osteotomy, bilateral sagittal split ramus osteotomy, genioplasty and mandible contouring to recover the facial symmetry. Results: All patients had got good occlusion, oral function and facial symmetry after the operation. The temporomandibular joint (TMJ) dysfunction syndrome alleviated or disappeared. No relapse of osteoma or facial asymmetry was found during the 3 months to 5 years follow-up period. The postoperative mandible ramus height was increased in most cases because of the regrowth of the condyle process. Conclusions: Computer-assisted surgical navigation can precisely accomplish the condylectomy via intraoral approach through coronoid process osteotomy. It has no skin scars, no risk of facial nerve. Furthermore it has less trauma to the patient than traditional condylectomy, and can better preserve the TMJ structure and function. http://dx.