Application of 3-D skull models and guide plates in the treatment of unilateral orbitozygomatic deformity after fracture / 中华整形外科杂志

<p><b>OBJECTIVE</b>To discuss the application of 3-D skull models and guide plates in treatment of unilateral orbitozygomatic deformity after fracture.</p><p><b>METHODS</b>Each patient underwent CT scan and DICOM data was obtained preoperatively. Two 3-D resin skull models were produced by rapid prototyping technique. The first model was produced based on the patient's original data and the second was the reshaped model by mirroring the unaffected facial side to the traumatic side. The original model was used for measurement of the fracture displacement in three directions and model surgery. On the second model, one 2.0 mm miniplate (Synthes Inc) was bended along the orbital rim as the repositioning guide plate. During the operation, osteotomy and reduction of zygomatic and the periorbital fractures was guided by prepared repositioning guide plate, following by orbital wall reconstruction and bone grafting.</p><p><b>RESULTS</b>From March 2007 to February 2009, 7 cases (6 males and 1 female) were treated successfully with no infection or graft extrusion. One week after operation, the patient received CT examination again. The shape and location of zygomatic bone and arch was good. Three cases were followed up for 3 months. Among them, facial symmetry was achieved in 2 cases. Cicatricial contracture and temporal soft tissue atrophy occurred in one case.</p><p><b>CONCLUSIONS</b>Reliable therapeutic effect can be achieved by application of rapid prototyping technique and repositioning guide plate in the treatment of complicated posttraumatic orbitozygomatic deformity.</p>

Prosthetic replacement of condylar head for management of traumatic temporomandibular joint ankylosis / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To preliminarily evaluate the method of using titanium condylar protheses in management of traumatic temporomandibular joint ankylosis.</p><p><b>METHODS</b>Between August 2006 and April 2008, titanium condylar replacement was performed in 5 male patients. Preoperative CT datum of patient was obtained and a resin model was then produced and used as a reference to select a suitable titanium condyle for reconstruction of the joint. In the operation, the bony ankylosis was removed. According to the preoperation planning, the selected prosthesis was inserted and fixed to the distal mandibular segment. The results were assessed by means of examinations and measurements postoperatively and during follow-up.</p><p><b>RESULTS</b>The 5 patients received alloplastic replacement of 6 condyles. Three patients were under follow-up and follow-up time ranged from 8 months to 2 years and 6 months. The mean mouth opening was 30 mm. Two patients had good occlusion and one patient developed a slight open bite.</p><p><b>CONCLUSIONS</b>Prosthetic condylar replacement can provide a choice for management of traumatic temporomandibular joint ankylosis.</p>