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Until now, computer-assisted surgery has not been practiced as part of the surgical routine of posttraumatic orbital reconstruction. The purpose of this study was to investigate the use of a navigation system for computer-assisted preoperative planning with virtual reconstruction to obtain symmetry of the orbits and intraoperative control of virtual(More)
In patients with Graves' orbitopathy (GO), magnetic resonance imaging (MRI) is a valuable tool to distinguish the acute inflammatory active disease from fibrotic, inactive end stage disease in demonstrating interstitial oedema within the extraocular muscles on coronal TIRM-sequences. MRI is the modality of choice to identify active inflammatory changes and(More)
Alloplastic materials offer a number of advantages over bone autografts in the reconstruction of craniofacial defects. These include: lack of donor site morbidity, unlimited quantities of available material, and the possibility to conform exactly to the defect. An ideal bioresorbable material would degrade slowly, and have osteoconductive properties to(More)
3D/2D patient-to-computed-tomography (CT) registration is a method to determine a transformation that maps two coordinate systems by comparing a projection image rendered from CT to a real projection image. Iterative variation of the CT's position between rendering steps finally leads to exact registration. Applications include exact patient positioning in(More)
Iotrol, a new nonionic, water-soluble, hexiodinated dimeric contrast medium for myelography, was used in clinical trials in 29 patients. The purpose of the study was to acquire information on local and general tolerance, distribution and excretion, and image quality. Preliminary results show that iotrol is well suited for lumbar and thoracolumbar(More)
Inter-individual size and shape (form) variation for the orbital floor and medial wall was assessed and compared with its posterior partition. Reconstruction of the posterior partition is known to be a surgical challenge in complex orbital defect repair when using standard manual implant contouring and positioning techniques. The size variation of both(More)
Between January 1996 and December 2001, 72 out of 354 patients were included in a retrospective study analysing the outcome of repaired orbital wall defects. Selection was dependent on the availability of pre and postoperative CT scans and on ophthalmologic examination. In particular, orthoptical assessment was performed up to 1 year after operation. In 72(More)
This article reviews 31 condylar neck fractures in 30 patients stabilized with different types of plates with emphasis on complications associated with different types of plates. Indications for stabilization were predominantly bilateral fractures, shortening of the ascending ramus due to lack of occlusal buttressing and condylar neck fractures associated(More)
BACKGROUND With increasing atrophy, fractures of the edentulous mandible tend to have a higher incidence of nonunion. However, the connection between disturbances of bony consolidation and inadequate primary stability is often insufficiently discussed. FIXATION Rigid internal fixation with 2.7 or now 2.4 AO compression and reconstruction plates is a safe(More)