Faktoren für die Kinndifferenzierung

Ohne ZusammenfassungMit 22 AbbildungenReferat, gehalten auf der Wissenschaftlichen Jahrestagung der Deutschen Gesellschaft für Kieferorthopädie vom 21. bis 24. 5. 1964 in Salzburg.     

Biologische Wesenszüge der Kieferorthopädie

Zusammenfassung Das Objekt unserer Forschung ist der lebendige Organismus. Zu seinen Verständnis muß man ihn in elementare Einheiten auflösen jedoch auch wieder durch Summierung der Teile und Vorgänge zum Verständnis der Funktion des Ganzen zu gelangen trachten. Das Kauorgan ist gewiß nur ein sehr kleiner Teil des organischen Ganzen. Seine Wechselbeziehungen dazu sind der lebensgesetzlichen Ordnung, physiologischen wie psychologischen Ereignissen unterworfen. Mit anderen Worten gesagt, beruhen die Formbildungsvorgänge der Entwicklung auf vorhandenen Potenzen, die je nach Individuum verschieden sind. Daher steht der Patient als individuelle Persönlichkeit im Mittelpunkt unseres fachlichen Bemühens.Mit dieser Skizze wurden allgemeine Beziehungen zwischen Ätiologie, Diagnose, Prognose und Therapie in der Kieferorthopädie gestreift und das auch für unser Fach interessante Gebiet der psycho-physischen Persönlichkeitsanalyse angeschnitten. Das sind, so will mir scheinen, aktuelle biologische Wesenzüge der modernen Kieferorthopädie.Herrn Professor Dr. Dr. Gustav Korkhaus zum 60. Geburtstag gewidmetMit 1 AbbildungAlles ist im Keim enthalten, —Alles Wachstum ein Entfalten. Rückert.     

Die Bedeutung der Funktionskieferorthopädie für die Prophylaxe der Parodontopathien

Ohne ZusammenfassungI. TeilII. TeilMit 6 AbbildungenVortrag, gehalten auf der gemeinsamen Wissenschaftlichen Tagung der Deutschen Arbeitsgemeinschaft zur Erforschung der Parodontopathien (Arpa) und der Deutschen Gesellschaft für Kieferorthopädie am 29. Mai 1958 in Bonn.     

Die Bedeutung parafunktioneller Vorgänge für die Kieferorthopädie

Ohne Zusammenfassung     

Neue Gesichtspunkte für die Behandlung vertikaler Anomalien

Ohne ZusammenfassungMit 8 Abbildungen     

Schnell abbindender Kalziumphosphatzement für die kraniomaxillofaziale Chirurgie

Background

Long-term results using hydroxyapatite cement (Bone Source^®) for the reconstruction of the facial skeleton and the forehead are reported.

Material and methods

The cement consists of 73% tetracalcium phosphate and 27% dicalcium phosphate. Using 0.25 M phosphoric acid instead of water, the primary setting time can be shortened from 20 to 5 min in an isothermic reaction. Twenty-two patients suffering from consequences of trauma, tumorlike lesions, or neoplasm as well as dysmorphia were treated.

Results

Following implantation, the healing process proceeded in most cases without complications. Due to hematoma and seroma as well as infection, two implants were lost. Follow-up examinations could be performed in 19 of the 22 patients on a average 40 months after operation. Most patients had good clinical long-term results. X-ray-analysis showed some discrete resorption of the implants in six patients. The further course must be decided based on clinical relevance.

Discussion

The hydroxyapatite cement used in this study evidenced good intraoperative handling, an excellent histologically proved biocompatibility, and good long-term stability in normal body fluid. Up to now we have limited its use to non-load-bearing applications in craniofacial surgery.     

Über die Einflüsse,die zu einer Hemmung oder Förderung der Entwicklung des Oberkiefers führen

Ohne ZusammenfassungPreisarbeit, eingereicht zum wissenschaftlichen Wettbewerb der Deutschen Gesellschaft für Kieferorthopädie (Abgabetermin 1. April 1956).     

Einfluss unterschiedlicher Anrührflüssigkeiten auf die mechanischen und mikromorphologischen In-vitro-Eigenschaften von Hydroxylapatitzement

Aim

In reconstructive craniofacial surgery a new synthetic hydroxyapatite cement has been used in the last few years. Tetra- and dicalcium phosphates react with either slow setting aqua bidest. or with faster setting sodium monophosphate solution to hydroxyapatite. The aim of this study was to investigate the two mixing fluids of hydroxyapatite for resulting micromorphology, pressure strength, and interactions with fibroblasts.

Material and methods

Pressure strength tests of hydroxyapatite cement test samples (n=80) were performed after a setting time of 3 and 24 h. The micromorphology of surfaces of the resulting particles was assessed under an electron microscope. In cell cultures L-929 and HEp2 cells were incubated with test samples and cell growth was assessed by light and electron microscopy.

Results

The test samples mixed with sodium monophosphate solution showed statistically significantly higher values of pressure strength. The resulting pressure strength depended on respective mixing fluids, setting time, and pressure of application. In general, test samples mixed with sodium monophosphate solution showed a more load-stable, homogeneous anorganic matrix whereas test samples mixed with aqua bidest. had a porous microarchitecture which was more fragile. In cell culture the porous structure showed disintegration in cell culture medium.

Conclusion

To what extent the two mixing liquids of hydroxyapatite cement influence the resorption and bony substitution has to be shown in further studies.     

Rückblick auf die Entwicklung der Dysgnathiechirurgie und Ausblick

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.      

Follikularzysten an retinierten Eckzähnen und ihre Bedeutung für die Kieferorthopädie

Ohne ZusammenfassungMit 12 Abbildungen