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Zusammenfassung Die Tumoren der Hamblase belaufen sich auf 3% aller bosartigen Geschwulste und stehen an zweiter Stelle unter allen Neubildungen des Harntraktes. Das mannliche Geschlecht ist uberwiegend betroffen. Die Haufigkeit der Erkrankung kumuliert um das 70. Lebensjahr. Neben der transurethralen Resektion (TUR) wird immer mehr die Lasertherapie eingesetzt ( 1-3). Im Laufe von 2 Jahren wurden 49 Kranke (39 Manner und 10 Frauen) mit TUR und Neodym-YAG-Laser behandelt. Die Tumoren befanden sich im Stadium T 1 , N 0 , M0 0 . Als Kontrolle diente eine Gruppe von 20 Kranken ebenfalls mit Hamblasentumoren, die jedoch nur mit TUR behandelt wurden. Die Ergebnisse zeigen, daβ die Rezidivhaufigkeit nach einer kombinierten Therapie der Hamblasentumoren niedriger im Vergleich zu den nur mit TUR behandelten Fallen ist.

This article presents a comparative clinical study of reinforced zinc oxide eugenol (EBA) cement and amalgam used as retrograde root filling materials. All patients were followed for a minimum of 3 years after surgery. Clinical and radiographic evaluation was performed. Successful healing with complete bone regeneration was noted in 57% in the reinforced zinc oxide eugenol group compared with 52% in the amalgam group. Uncertain healing with a certain degree of bone regeneration was seen in 24% in the reinforced zinc oxide eugenol group compared with 19% in the amalgam group. Unsuccessful healing with failure of bone regeneration was seen in 20% in the reinforced zinc oxide eugenol group compared with 29% in the amalgam group. Statistical analysis failed to show any significant difference in healing between the two retrograde filling materials. The results of this study indicate that retrograde root filling with reinforced zinc oxide eugenol cement has a similar prognosis as with amalgam over a 3-year period.

This article presents a comparative clinical study of reinforced zinc oxide eugenol (EBA) cement and amalgam used as retrograde root filling materials. All patients were followed for a minimum of 3 years after surgery. Clinical and radiographic evaluation was performed. Successful healing with complete bone regeneration was noted in 57% in the reinforced zinc oxide eugenol group compared with 52% in the amalgam group. Uncertain healing with a certain degree of bone regeneration was seen in 24% in the reinforced zinc oxide eugenol group compared with 19% in the amalgam group. Unsuccessful healing with failure of bone regeneration was seen in 20% in the reinforced zinc oxide eugenol group compared with 29% in the amalgam group. Statistical analysis failed to show any significant difference in healing between the two retrograde filling materials. The results of this study indicate that retrograde root filling with reinforced zinc oxide eugenol cement has a similar prognosis as with amalgam over a 3-year period.

In der Arbeit werden die Korrelationen im Korrosionsverhalten eines kohlenstoff-armen Stahles in Meeresatmosphare und in einer Salznebelkammer dargestellt. Die Korrosionsprufungen in Meeresatmo-sphare wurden durch Freibewitterung und in einer Kabine an der Schwarzmeer-kuste im Verlauf von zwei jahren durch-gefuhrt. Die Laborkorrosionsprufungen wurden in einer Salznebelkammer im Verlauf von 70 Tagen durchgefuhrt. Die Korrelation zwischen den Labor- und Freibewitterungsprufungen wurden gra-phisch dargestellt. Es werden Angaben uber die chemische Analyse der Korro-sionsprodukte gemacht. Correlation between laboratory and weathering tests with a low carbon steel in maritime atmosphere The work presented here shows a possible correlation of the corrosion behaviour of a low carbon steel in maritime atmosphere and in a salt spray chamber. The corrosion tests in maritime atmosphere have been conducted in the open air and in a covered cabin at the coast of the Black Sea over two years. The laboratory corrosion tests have been conducted in a salt spray chamber and had a duration of 70 days. The correlation between laboratory and weathering tests is represented graphically. The chemical composition of the corrosion products is given.