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  • 2000-2004  (2)
  • 1965-1969  (1)
  • 1935-1939
  • Circular frame technique  (1)
  • Key words Melanoma  (1)
  • Polymer and Materials Science  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Der Orthopäde 29 (2000), S. 821-831 
    ISSN: 1433-0431
    Keywords: Schlüsselwörter Kongenitale Tibiapseudarthrose ; Ilizarov-Methode ; Simultane Korrektur von Pseudarthrose ; Achsenfehlstellung und Beinlängendifferenz ; Keywords Congenital pseudarthrosis of the tibia ; Circular frame technique ; Simultaneous correction of pseudarthrosis ; Length discrepancy and axial deformity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Congenital pseudarthrosis of the tibia (CPT) is one of the most challenging conditions in paediatric orthopaedics. The history of CPT treatment ischaracterised by repeatedly ineffective surgical interventions with the inevitable outcome of severe disability. Most procedures failed to account for the complexity of the problem. The past two decades have witnessed more experience having been gained with the Ilizarov technique. This method provides a comprehensive approach to all aspects of CPT problem, allowing the surgeon to simultaneously address the problems of union as well as those of deformity, length discrepancy joint function, ankle valgus and weight bearing. It appears that the goal to achieve stable fusion before the child begins school is attainable. In the pre-pseudoarthrotic stage, bracing should be preferred to surgery until the patient is in an older age group. This study reports on the results of 19 patients: 15 have finished treatment, and 14 of them with a stable fusion at follow-up. The results were highly encouraging in reaching the ultimate goal of avoiding amputation and achieving a well-functioning limb.
    Notes: Zusammenfassung Die kongenitale Tibiapseudarthrose gehört zu den schwierigsten Krankheitsbildern in der Kinderorthopädie. Anamenstisch findet sich bei diesen Patienten meist eine Vielzahl ineffektiver, operativer Eingriffe und letztendlich auch ein funktionell unbefriedigendes Ergebnis in Form einer den Patienten schwer behindernden Deformität. Bei den meisten dieser Behandlungsverfahren wird der Komplexität des Problems kongenitale Tibiapseudarthrose nicht entsprechend Beachtung geschenkt. In den letzten Jahren wurden deshalb Verfahren entwickelt, die eine erfolgreiche Behandlung ermöglichen. Es handelt sich dabei um den vaskularisierten Fibulatransfer und die Ilizarov-Technik. Letzterer muss unserer Meinung nach deshalb der Vorzug gegeben werden, da sie dem behandelnden Orthopäden die Möglichkeit gibt simultan sowohl Pseudarthrose, als auch Achsendeformität, Beinlängendifferenz, und Sprunggelenkvalgus zu behandeln. Weiter hat sich gezeigt, dass allzu frühe operative Eingriffe ungünstig sind und dass es sinnvoll ist, primär eine konsequente konservative Therapie durchzuführen, um im Alter von 3–6 Jahren operativ eine stabile Fusion der Pseudarthrose mit Korrektur der Begleitdeformität zu erreichen. Die vorliegende Arbeit berichtet über eigene Ergebnisse bei 19 Patienten, von denen bei 15 die Behandlung abgeschlossen wurde, wobei bei 14 Patienten eine stabile Fusion zum Zeitpunkt der Nachuntersuchung erzielt werden konnte. Die Ergebnisse waren sowohl klinisch als auch funktionell äußerst zufriedenstellend und lassen den Schluss zu, dass eine erfolgreiche Behandlung der Tibiapseudarthrose heute möglich ist und eine Amputation daher als obsolet angesehen werden muss.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 292 (2000), S. 225-232 
    ISSN: 1432-069X
    Keywords: Key words Melanoma ; Melanoma-metastases ; Bcl-2 ; Bcl-x ; Bax
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Apoptosis is an important cofactor in the pathogenesis of a plethora of malignancies. However, little is known about modulation of the expression of bcl gene family in melanocytic tumors. To determine the role of bcl-2, bcl-x and bax in melanocytic tumors we investigated the differential expression of these genes via RT-PCR in tissue samples from human ¶benign nevi, primary melanomas and melanoma metastases in comparison with normal skin. Bcl-2 was strongly expressed in 14/16 metastases (87.5%), whereas only 7/13 primary melanomas (53%), 7/15 nevi (46%) and 7/16 normal tissue samples (43%) showed expression of bcl-2 (P 〈 0.05). There was a strong indication of a correlation between tumor thickness and bcl-2 expression in nodular malignant melanomas. Expression of bcl-x was found in 16/16 melanoma metastases (100%), 11/13 primary melanomas (84%), 12/15 nevi (80%) and 10/16 normal tissue samples (62%) (P 〈 0.05). Bcl-xL expression increased from primary melanoma to melanoma metastases, whereas bcl-xS showed a decreasing expression level during melanoma progression. No differences in bax expression were seen between melanoma metastases, primary melanoma, nevi and normal tissue. Immunohistochemical investigations of another 53 tissue samples showed similar results. Our results strongly indicate that bcl-2 and bcl-xL gene expression increases with progression of malignant melanoma. Bcl-2 and bcl-xL expression could reflect an increased malignant potential caused by an inhibition of apoptosis and growth advantage for metastatic melanoma cells.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: During an investigation of various epoxide resin systems, some cases were found in which the room temperature density decreased with increasing curing temperature and increasing degree of cure. In other systems the density was found to be independent of the curing temperature. In these cases it is possible by deliberately stopping the reaction to measure density values which also decrease as the curing progresses. This unexpected behavior can be explained in a purely physical manner from the pattern of the density changes during an entire curing cycle. The density decrease of the noncured mixture, which is due to the increased curing temperature, outweighs all contraction effects consisting of isothermal chemical and cooling shrinkage, whereby the latter is dependent to a great extent on the glass temperature. In those cases where the glass temperature exceeds the curing temperature, the chemical reactions come to a standstill, when the temperature difference reaches a certain value, i.e. it “freezes chemically”. By means of values that can be measured readily at low temperatures, it is possible to construct diagrams from which the variation of the density at higher temperatures of the curing cycle can be estimated.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
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