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  • Articles: DFG German National Licenses  (5)
  • 1995-1999  (5)
  • 1998  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mund-, Kiefer- und Gesichtschirurgie 2 (1998), S. 58-61 
    ISSN: 1434-3940
    Keywords: Schlüsselwörter Plattenepithekarzinom ; Immunglobulin-Autoantikörper ; Immundefekt ; Key words Squamous cell cancer ; Ig autoantibodies ; Immune defect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Squamous cell cancer of the oral cavity mainly occurs in older patients or in patients with alcohol or nicotine abuse. Younger patients are seldom involved. The case of a 27-year-old woman with a squamous cell cancer of the right cheek will be presented. Without any risk factors, an immune defect resulting in chronic Candida infection of the oral cavity seems to be responsible for the carcinogenesis.
    Notes: Plattenepithelkarzinome im Bereich der Mundhöhle treten meist bei älteren Patienten oder bei Patienten mit Alkohol- oder Nikotinabusus auf. Bei jüngeren Patienten werden diese selten beschrieben. Es wird über die Kasuistik einer 27jährigen Patientin mit einem Plattenepithelkarzinom im Bereich der rechten Wange berichtet. Bei fehlenden Risikofaktoren wird ein zellulärer Immundefekt und eine langjährig persistierende Candidainfektion für die Karzinogenese verantwortlich gemacht.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Mund-, Kiefer- und Gesichtschirurgie 2 (1998), S. 316-319 
    ISSN: 1434-3940
    Keywords: Schlüsselwörter Zerebrovaskuläre Ischämie ; Odontogener Focus ; Total-Dental-Index ; Panoramaschichtindex ; Präventivmedizin ; Key words Cerebrovascular ischemia ; Dental focus ; Total dental index ; Panoramic index ; Preventive medicine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Recent studies have shown that acute infections, especially of the respiratory tract, are an important risk factor for cerebral ischemia. Additionally we know that chronic dental infections may be a risk for myocardial infarction and artherosclerosis. However, the connection between stroke and dental infections has hardly been examined so far. Therefore we performed a case-control study using a standardized questionaire and examination. We investigated 66 patients consecutive to a acute cerebral ischemia/stroke and 60 age- and sex-matched nonstroke neurological patients as a control group. Dental status was determined by a so called total dental index (TDI) which reflects primarily caries, periodontitis, periapical lesions, devital and missing teeth as well as by a panoramic index (PI). Specifically, older patients with cerebrovascular ischemia tended to have a significantly worse dental status and had more severe periodontitis and periapical lesions than control subjects. A predefined poor dental status was associated with cerebrovascular ischemia independent from other vascular risk factors and social status. In conclusion, poor dental health, mainly resulting from chronic dental infections, may be associated with an increased risk for cerebrovascular ischemia. The results must now be verified in larger studies. As chronic dental infections are a common and also easily treatable factor, their identification as a risk factor for stroke would be quite important in the field of preventive medicine.
    Notes: Frühere Studien haben gezeigt, daß akute Infektionen, insbesondere der Atemwege, einen wichtigen Risikofaktor für zerebrale Ischämien darstellen. Weiterhin wissen wir, daß chronische odontogene Infektionen ein Risiko für myokardiale Infarkte und Arteriosklerose sein können. Der Zusammenhang zwischen zerebralen Insulten und dentalen Infektionen wurde jedoch bislang kaum untersucht. Daher führten wir eine Fall-Kontroll-Studie unter Anwendung eines standardisierten Erhebungsbogens und Untersuchungsprotokolls durch. Es wurden 66 Patienten mit einer akuten zerebralen Ischämie/Insult sowie 60 weitere alters- und geschlechtsentsprechende neurologische Patienten als Kontrollgruppe untersucht. Der Zahnstatus wurde durch einen sog. Total-Dental-Index (TDI), welcher in erster Linie Karies, Parodontitis, periapikale Läsionen, devitale und fehlende Zähne berücksichtigt, sowie durch einen Panoramaschichtindex (PI) erfaßt. Speziell ältere Patienten mit einer zerebralen Ischämie wiesen tendenziell einen signifikant schlechteren Zahnstatus auf und besaßen deutlich öfter Parodopathien und apikale Läsionen als Kontrollpersonen. Ein vorbestehender schlechter Zahnstatus war verknüpft mit einer zerebrovaskulären Ischämie unabhängig von anderen vaskulären Risikofaktoren und dem sozialen Status. Zusammenfassend gesagt, kann eine schlechte Zahngesundheit, v.a. aus chronischen odontogenen Infektionen resultierend, mit einem erhöhten Risiko für zerebrovaskuläre Ischämien verbunden sein. Die Ergebnisse müssen nun in größeren Folgestudien verifiziert werden. Da chronische dentale Infektionen weit verbreitete und ebenso leicht therapierbare Faktoren darstellen, würde ihre Identifikation als Risikofaktor für einen Insult eine ziemlich wichtige Rolle im Bereich der Präventivmedizin spielen.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 66 (1998), S. S805 
    ISSN: 1432-0630
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' journal of analytical chemistry 361 (1998), S. 547-553 
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Surface analytical methods such as scanning electron microscopy (SEM), scanning force microscopy (SFM), energy dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS) were used to study the surface properties of amalgam substitutes as tooth filling materials. In particular the corrosion resistance of new gallium restorative materials was determined. To give relevant practical data, the measurements were performed before and after storing the alloys in artificial saliva to simulate physiological oral conditions. Subsequently an analysis of the artificial saliva was carried out with atomic emission spectroscopy with inductively coupled plasma (ICP-AES). Selective corrosion of different phases and a high gallium release could be determined.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Radiation and environmental biophysics 37 (1998), S. 95-100 
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract Lipid peroxidation induced by heavy ion irradiation was investigated in 1,2-dilinoleoyl-sn-glycero-3-phosphocholine (DLPC) liposomes. Lipid peroxidation was induced using accelerated heavy ions that exhibit linear energy transfer (LET) values between 30 and 15 000 keV/μm and doses up to 100 kGy. With increasing LET, the formation of lipid peroxidation products such as conjugated dienes, lipid hydroperoxides, and thiobarbituric acid-reactive substances decreased. When comparing differential absorption spectra and membrane fluidity following irradiation with heavy ions and x-rays (3 Gy/min), respectively, it is obvious that there are significant differences between the influences of densely and sparsely ionizing radiation on liposomal membranes. Indications for lipid fragmentation could be detected after heavy ion irradiation.
    Type of Medium: Electronic Resource
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