ABSTRACT
Objective This study was to evaluate the clinical outcomes of orbital blowout fracture repair using the individual titanium mesh bent by computer-aided rapid prototyping . Methods The CT imaging data of 11 cases of orbital blowout fracture were analyzed.The subciliary approach was used for the exposure of the fractures .An appropriate 3D-printed titanium mesh pre-bent by computer-aided rapid prototyping was selected and implanted according to the characteristics of a given defect .The surgical results were analyzed by evaluating diplopia , eyeball movement , enophthalmos , and the position of the titanium mesh and comparing the orbital vol-ume before and after surgery . Results All the operations were successfully accomplished .No remolding or trimming was needed for the pre-bent titanium mesh and implanted titanium mesh was tightly fixed to the orbital wall .The patients were followed up for 3 -12 months, which revealed no symptoms of diplopia in any of the patients . Volumetric analysis showed a significantly reduced orbital volume difference from (2.60 ±0.43) mL preoperatively to (-0.07 ±0.62) mL postoperatively (P<0.01).Enophthalmos was desirably correc-ted, with the enophthalmos difference decreased from (2.35 ±0.81)mm preoperatively to (-0.10 ±0.52) mm postoperatively (P<0.01).No extra-ocular muscle limitation was observed . Conclusion The individual titanium mesh bent with computer-aided rapid prototyping technology can be applied to orbital blowout fracture repair , which may achieve a high success rate of anatomic restoration of the orbital volume and effective prevention of enophthalmos .
ABSTRACT
Objective Parotidectomy and superficial parotidectomy are traditional surgical treatment to the malignant parotid gland tumour although they have many defects.The aim of this study was to analyze the feasibility of individualized treatment to patient according to tumor`s size and TNM stage. Methods Thirty three patients with low grade malignant parotid gland tumours from Dec 2005 to Dec 2010 were recruited in the present study.All the patients received the territorial surgical resection firstly.Then, 9 cases re-ceived the expanded territorial surgical resection (1 case had recurrent probability, accepted adjuvant radiotherapy).Sixteen cases un-derwent parotidectomy with complete tumor resection ( 2 case had envelope invasion, accepted adjuvant radiotherapy) .Eight cases ac-cepted adjuvant radiotherapy(4 cases on T1 and T2 stage preserved facial nerve although the nerves adhering to tumors, and other 4 ca-ses on T4a stage accepted facial nerve excision ) . Results Follow up ranged from 3.5 to 8.5 years and no recurrences were docu-mented.9 patients who accepted territorial surgical resection showed fine facial symmetry.8 cases of them without adjuvant radiotherapy had good salivary secretion.Nine cases of other 24 patients showed temporary facial nerve injury and recovered within 1 to 4 months. Four cases with facial nerve excision showed permanental facial paralysis. Conclusion To protect the function of parotid gland to the greatest extent, the small low grade malignant parotid gland tumors without facial nerve invasion could have territorial surgical resection. Combined territorial surgical resection with postoperative adjuvant radiation therapy is useful to avoid the tumors recurrence and en-croachment of facial nerve to protect the facial nerve function.