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  • 1985-1989  (4)
  • 1
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Results of experiments on dark- and photoconductivity of polymeric dibenz[b,i] 1,4,8,11-tetraaza[14]annulenato(μ-pyrazin) iron(II) [Fetaa(pyz)]n are described. By studying the dependence of photoconductivity on electric field, intensity and wavelength it is shown that photogeneration of charge carriers occurred at short wavelengths by an Onsager mechanism and in the near-infrared region by a photoinjection process from the electrodes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 72 (1985), S. 431-432 
    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
    Naturwissenschaften 75 (1988), S. 360-360 
    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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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of orofacial orthopedics 47 (1986), S. 421-428 
    ISSN: 1615-6714
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary As a result of the existing bone defect in the alveolar process caused by the unilateral and bilateral clefts, there is not only a weak point in the statics of the maxilla, but also in the periodontium of the adjacent teeth in the cleft area. This causes early loss of those teeth. To maintain the permanent anterior teeth the development of the periodontium should be promoted by bone-grafting at the primary cleft palate-closure, before the eruption of the permanent anterior teeth. The periodontium is secured by the bony healing at the site of the cleft.
    Abstract: Résumé Le manque d'os causé par une fente uni- ou bilatérale au niveau du pro es alvéolaire de la mâchoire supérieure, perturbe non seulement la statique du maxillaire mais affaiblit aussi la parodonte des dents voisines ce qui peut provoquer une perte prématurée de ces dents. Pour conserver les incisives permanentes, on doit assurer le développement du parodonte au moyen d'une transplantation d'os, réalisée au cours de la première intervention chirurgicale, avant l'éruption de ces dents.
    Notes: Zusammenfassung Infolge des bestehenden Knochendefektes im Alveolarfortsatz durch ein- oder beidseitige Kieferspalten werden nicht nur die Statik des Oberkiefers, sondern auch die Zahnhalteapparate der spaltbenachbarten Zähne geschwächt, wodurch es zum vorzeitigen Verlust dieser Zähne kommt. Um die bleibenden Frontzähne zu erhalten, sollte die Ausbildung des Parodontiums durch knöcherne Ausheilung der Kieferspalten vor deren Durchbruch mittels Knochentransplantat bei der primären Kiefer- und Gaumenplastik gesichert werden.
    Type of Medium: Electronic Resource
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