PubMed Health⌕ Search

Biomedical subjects

E W Steinhäuser

Publications and source records attributed to E W Steinhäuser.

At least 19 recordsLinked to original sources

[Retrospective view of the development of malocclusion surgery and prospects].

DEVELOPMENT: The history of the correction of the jaw deformities began in the US more than 100 years ago with a bilateral osteotomy in a case of mandibular prognathism performed by Vilray Blair. This operation was the starting point for Blair's interest in jaw surgery. In 1907 he already described three different operative techniques for the correction of malpositions of the lower jaw. Between the First and the Second World War no major progress in corrective jaw surgery occurred, until in the fifties of the 20th century a rapid development started off. Mainly in Germany and in Austria new operative techniques not only for the mandible, but also for maxilla and midface were established. Finally, this development reached its height in the simultaneous total osteotomy of upper and lower jaw that was published by Obwegeser in 1970. OUTLOOK: Innovations first of all in regard to technical improvements especially in four fields could be realized within the past 20 years. For planning of a procedure mostly computer-assisted systems combined with video- or laser technique were utilized. The improvement of resorbable materials such as plates and screws can be considered as a major progress. With regard to new operative techniques not only first results with navigation systems but also the introduction of endoscopic osteotomies were reported. Distraction osteogenesis was successfully performed on developmental deformities of the mandible, the maxilla, and the midface, while technical devices are being improved continuously. As in all fields mentioned above development is not yet completed further improvements can be expected.

Austria↗

Mandibular reconstruction with cancellous bone, hydroxylapatite and titanium mesh.

Over the past 20 years, titanium mesh combined with autologous iliac crest spongiosa and hydroxylapatite has performed well in the restoration of mandibular discontinuity defects in 79 patients. In 14 irradiated patients with a transplant bed of inferior quality, however, complications and failures occurred more often than in the 65 non irradiated patients. The results of our investigation clearly show that the success of mandibular reconstruction mainly depends on a well vascularized transplant bed.

Adult↗

[Reconstruction of the orbital walls by autologous calvarial transplants].

This article reports on the experience gained with outer table calvarial bone grafts used for the reconstruction of the bony orbital walls in 43 patients. The transplants were harvested in the parietal area above the non-dominant hemisphere. Morbidity and complication rate at the harvest site were extremely low. In all patients the grafts became uneventfully incorporated.

Bone Transplantation↗

[Surgical and orthodontic treatment approach for cleidocranial dysostosis].

Developmental deformities of the permanent dentition are of primary concern in the treatment of patients suffering from cleidocranial dysostosis. The therapeutic approach should be based on interdisciplinary cooperation between orthodontists as well as oral and maxillofacial surgeons. Therapy may include surgical exposure of impacted teeth in combination with removal of supernumerary teeth. Already during the surgical procedure orthodontic bands and brackets may be attached. The next step in treatment should consist of orthodontic alignment of the teeth and correction of the jaw relations. In most cases, midfacial hypoplasia and corresponding abnormal jaw relations are also present. This deformity is best treated with midfacial osteotomy. Following this second surgical intervention, orthodontic treatment is completed in order to establish an optimal result regarding function and esthetics.

Adult↗

Condylar position following ramus osteotomy and functional osteosynthesis. A clinical function-analytic and computer tomographic study.

Opponents of the application of a stable fixation of the fragments with compression screws in osteotomies of the mandibular ramus quite often claim that there is the possibility of a postoperative dislocation of the proximal fragment with consequent functional disturbances of the temporo-mandibular joint. For determination of the frequency and the extent of such possible displacements of the condyle, a total of 174 patients, in whom ramus osteotomies were performed, were clinically examined. In 9 of them, a functional analysis and in 10 other patients, a CT scan investigation of the position of the TM joint, was carried out. Only in 1 case could a considerable dislocation of the proximal fragment be observed, which was due to a strong unilateral deviation of the ascending ramus. For correction of the functional disturbance the bone screws had to be removed in this particular case. In those cases where a functional analysis and CT study were undertaken, only slight changes of the pre- and post-operative position of the condyles were observed: it did not lead to clinical disturbances and complaints.

Bone Screws↗