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  • 1990-1994  (5)
  • 1980-1984
  • 1955-1959
  • 1925-1929
  • 1994  (5)
Material
Years
  • 1990-1994  (5)
  • 1980-1984
  • 1955-1959
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 81 (1994), S. 553-554 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 81 (1994), S. 553-554 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of orofacial orthopedics 55 (1994), S. 202-208 
    ISSN: 1615-6714
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Fortythree out of 148 patients who had undergone velopharyngeal flap graft between 1980 and 1992 to treat velopharyngeal insufficiency, and for whom pre- and postoperative data were available, were studied for the purpose of determining the long term morphological functional results of the treatment. Almost all of the 43 patients (93,5%) had received a velopharyngeal flap graft according toSanvenero-Rosselli. The remaining 4.7% had received a velopharyngeal adhesion according toStellmach. Four physicians from the fields of oral surgery, orthodontics, phoniatries, and logopedies evaluated the pre- and postoperative data as well as the results of the follow-up examination according to subjective criteria from their respective disciplines. All four physicians judged that following velopharyngeal flap graft a gradual improvement in the ability to speak had been achieved in 86% of the patients in the follow-up study. At the time of the follow-up examination 70% of these cases were judged to have achieved a “good” qualitative level of articulation and 21% were judged to have achieved a “usefull” level. The best results were obtained in patients who had been operated on before the age of six. The reason is that in these young patients muscular malfunction and pathological movement patterns can be more easily modified than in okler patients. In many cases additional speech improvement was achieved through logopedical therapy following the velopharyngeal flap graft. In the most difficult cases intensive therapy while the patients were still hospitalized proved to be especially effective. The pre-operative use of transnasal flexible endoscopy to evaluate the interaction of the structures bearing on velopharyngeal closure proved its value in evaluating velopharyngeal flap graft's chances of success. Velopharyngeal flap graft thus offers the possibility of an efficacious treatment of velopharyngeal insufficiency, if both the preoperative diagnosis and postoperative therapy draw on the expertise of the above noted fields in an interdisciplinary common effort in which the limits of the treatment method are clearly taken into consideration.
    Notes: Zusammenfassung Von 148 Patienten, bei denen im Zeitraum von 1980 bis 1992 wegen einer velopharyngealen Insuffizienz eine Velopharyngoplastik durchgeführt wurde sowie prä- und postoperative Befunde vorlagen, wurden 43 Betroffene zur Einschätzung der morphologischen und funktionellen Spätresultate nachuntersucht. Bei 95,3% aller nachuntersuchten Patienten wurde eine Velopharyngoplastik nachSanvenero-Rosselli [15] und bei 4,7% eine Velopharynxadhäsion nachStellmach [19] durchgeführt. Die prä- und postoperative Beurteilung sowie die Nachuntersuchung erfolgten dabei nach subjektiven Kriterien durch Fachvertreter der Kieferchirurgie, Kieferorthopädie, Phoniatrie und Logopädie. Bei 86% der nachuntersuchten Patienten konnte nach Beurteilung aller Fachvertreter eine graduelle Sprachverbesserung mit einer Velopharyngoplastik erreicht werden. Zum Zeitpunkt der Nachuntersuchung war die Sprachqualität in 70% der Fälle gut und bei 21% branchbar beurteilt worden. Bei einer sprachverbessernden Operation vor dem sechsten Lebensjahr wirden die besten Ergebnisse erreicht, da zu diesem Zeitpunkt muskuläre Fehlfunktionen und pathologische Bewegungsmuster noch leichter umgestellt werden können. Eine weitere Verbesserung der Sprachqualität konnte in vielen Fällen durch eine logopädische Übungsbehandlung nach der Velopharyngoplastik erzielt werden. Die stationäre Intensivtherapie hat sich besonders bei schweren Fällen bewährt. Zur Abschätzung der Erfolgsaussichten einer Velopharyngoplastik hat sich die präoperative transnasale flexible Endoskopie zur Beurteilung des Zusammenspiels der am velopharyngealen Verschluß beteiligten Strukturen bewährt. Bei einer sachgerechten Indikationsstellung und effektiven Behandlung unter kritischer Berücksichtigung der Grenzen dieser Methodik in interdisziplinärer Zusammenarbeit ist die Velopharyngoplastik eine gute Möglichkeit zur Behandlung der velopharyngealen Insuffienz.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 349 (1994), S. 162-163 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Silicon Carbide (SiC) and Silicon Carbide with free Silicon [SiC(Si)] thin films were prepared by chemical vapor deposition (CVD) using an CH3SiCl3-H2-Ar gas mixture at temperatures of 1173 to 1323 K. The structure of these films were investigated by scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The effects of crystallinity, morphology and Si-concentration of the deposits were examinated in some detail.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 37 (1994), S. 1009-1025 
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: In this paper we discuss the theoretical and numerical formulation of 3-D Trefitz elements. Starting from the variational principle with the so-called hybrid stress method, the trial functions for the stresses have to fulfil the Beltrami equations, which means also the compatibility equations for the strains. The divergence theorem can be applied, and one arrives at a pure boundary formulation in the sense of the Trefftz method. Besides the resulting variational formulation, different regularizations of the interelement conditions are investigated by numerical tests. Two examples show the numerical efficiency of the derived elements. First, a geometric linear 3-D example is presented to show the effects on distorted element meshes. The third example shows the geometrically non-linear analysis of a shallow cylindrical shell segment under a singe load.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
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