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  • 1985-1989  (2)
  • Bone matrix gelatin  (1)
  • Gene expression
  • Ultrastructure
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 9 (1985), S. 181-188 
    ISSN: 1432-5195
    Keywords: Bone matrix gelatin ; Bone alloimplantation ; Osteoinduction ; Osteoconduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Une gélatine de matrice osseuse préparée par un traitement chimique séquentiel comportant une décalcification par l'acide chlorhydrique a été utilisée comme implant allogène dans le traitement des tumeurs osseuses, bénignes ou malignes, des dysplasies acétabulaires, des retards de consolidation, des pertes de substance traumatique, etc. Cette gélatine de matrice osseuse mise en place dans les cavités osseuses a été réhabitée avec succès 97 fois sur 99 (98%), à l'exclusion des cas d'infection ou de récidive de la tumeur. L'implant a également été placé à la surface de l'os, en inlay, dans 10 cas mais il s'est résorbé 5 fois, sans formation d'os. La réhabitation a été obtenue dans un délai de 6 à 33 mois (14,9 en moyenne). Une infection est survenue 5 fois sur 165 implantations (3%) sur des lésions osseuses antérieurement aseptiques. Une fièvre modérée persistant plus de dix jours après l'opération (traduisant probablement une réaction immunologique) a été observée 4 fois sur 160 implantations (2,5%), à l'exclusion des cas infectés. Les implants allogènes de matrice osseuse constituent donc un traitement efficace des pertes de substance osseuse avec un faible risque de complications, rejet ou infection.
    Notes: Summary Bone matrix gelatin, prepared by sequential chemical treatment including decalcification with 0.6 N hydrochloric acid [9], was used as an alloimplant for the treatment of benign bone tumours, tumorous conditions of bone, acetabular dysplasia, delayed union, traumatic bone defects and other disorders. The bone matrix gelatin implanted into bone defects was incorporated successfully in 98% of implantations, excluding cases of infection, tumour recurrence and recurrence of tumorous conditions. The material was also implanted into ten bone sites as an onlay but in five it was resorbed without new bone formation. The incorporation of the bone matrix gelatin into the recipient bed was completed from 6 to 33 months (average 14.9 months) after implantation. Wound infection complicated 5 of 165 implantations (3%) in previously uninfected sites. Low grade fever persisting after the tenth post-operative day (a probable sign of immunological reaction) occurred in 4 of 160 implantations (2.5%), excluding cases of infection. Alloimplants of bone matrix gelatin are thus effective in the treatment of bone defects. The risk of complication such as rejection or infection is low.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0568
    Keywords: Cecum ; Germ-free rat ; Microflora inoculation ; Morphometry ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The structural changes of the cecal wall in germfree rats were observed at regular intervals after the inoculation of fecal microflora from conventional rats. Quantitative light microscopy showed that most of the elements in the cecal wall increased at 12 or 24 h and reached peak values at 4 days after inoculation. On the 7th day, they decreased approximately to the values for conventional rats. The crypts were bent or widely open till 24 h but were not after the 4th day. Hyperplasia of the crypt epithelial cells including mucous-type cells was observed following microbial inoculation. Electron microscopy revealed that most of the epithelial cells lining the mucosa were typical columnar cells. Desquamation of the epithelial cells and contraction of the muscle fibers were often seen on 4th day. The mucous-type cells were divided into two types, goblet and non-goblet mucous-type cells. Reduction of cecal volume after microbial inoculation may be mainly caused by muscle contraction in the early period and hyperplasia and desquamation of the epithelial cells may suggest their role as the first and non-specific defense line prior to operation of the specific immune system.
    Type of Medium: Electronic Resource
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