ABSTRACT
Recurrent mandibular dislocation is an uncommon human disorder. It is found most frequently in people with neurologic diseases, patients with symptomatic temporomandibular joint diseases and in patients treated with neuroleptics. Numerous techniques have been developed for the surgical treatment of recurrent mandibular dislocation. Leclerc blocking procedure and other techniques are designed to limit the forward displacement of the condylar head. An alternative procedure is eminectomy where the articular eminence is removed in order to allow the condyle to move more freely. In the period 1990 to 1997, 23 patients (38 joints) were subjected to either Leclerc blocking procedure or eminectomy for recurrent mandibular dislocation at the Ullevål University Hospital. Treatment results were good, but some cases of recurrence were observed after the Leclerc blocking procedure.
Subject(s)
Surgical Procedures, Operative/methods , Temporomandibular Joint Disorders/surgery , Adult , Aged , Female , Follow-Up Studies , Humans , Joint Dislocations , Male , Middle Aged , Recurrence , Temporomandibular Joint/anatomy & histology , Temporomandibular Joint/physiopathology , Temporomandibular Joint/surgery , Temporomandibular Joint Disorders/physiopathology , Treatment OutcomeABSTRACT
In vitro experiments were performed in order to investigate the appearance of different types of central venous catheters at intravascular ultrasonography. The experiments were repeated with artificially produced thrombi which were made adherent to the catheter wall. All thrombi larger than 1 mm could be identified. In a clinical study including 12 patients who had a central venous catheter, transfemoral intravascular ultrasonography was performed. The catheters had been in place for an average period of 54 days (range 1-360 days). In 3 patients a catheter thrombus, mural thrombus, or occlusive vein thrombosis was found. In 2 of these patients the catheter was occluded, in the 3rd patient it was malpositioned into the contralateral brachiocephalic vein. There were no complications following the ultrasonographic procedures. Mean catheterization time was 7.5 min (range 3-20 min). The advantages of this new method compared with conventional phlebographic studies and its impact on further clinical investigations are discussed.