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Single Photon Emission Computed Tomography (SPECT), imaging of cerebral blood flow was carried out in ten patients with haemodynamically significant carotid stenosis. Before and after carotid endarterectomy each patient was investigated by 3--dimensional SPECT brain scanning using technetium--hexamethyl propyleneamine oxine (99 mTcHMPAO, ceretec). Brain… (More)
Cerebral perfusion through stenosed internal carotid arteries is usually maintained by autoregulation. However, flow reserve may be reduced, suggesting hemodynamically significant stenosis, and such reduction should be improved by carotid endarterectomy. This concept was studied in 20 subjects with unilateral internal carotid artery stenosis (major stenosis… (More)
The precision of 11 semiadjustable articulators was examined. The results indicate that for reproducible centric position it is necessary to practise centric lock. Neither guidance of the condylar element into centric relation by hand nor devices like feathers do secure against deviation. When putting usual pressure on the articulators all showed… (More)
"Roll-mounting" and mounting in inverted articulators have been examined. Approximately reproducible results were observed in all articulators.