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  • 1
    ISSN: 1432-5195
    Keywords: Congenital vertical talus ; Operative treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Le pied bot convexe congénital est défini par un équin irréductible de l'astragale et par une luxation dorsale irréductible du scaphoïde sur la tête de l'astragale. A côté de la pronation classique de l'avant pied, il existe une supination de l'avant pied dans un quart des cas. Parmi les 51 enfants de cette série, 20 avaient une atteinte bilatérale et 34 avaient des troubles neurologiques et/ou des malformations associés. Le diagnostic doit être fait dans les premières semaines de la vie pour permettre un traitement précoce. Il est essentiellement radiologique et repose surtout sur des clichés dynamiques de profil en équin et en talus forcé. La classification radiologique en 3 groupes de Pouliquen et Rigault a un intérêt pronostic et permet de poser des indications thérapeutiques en tenant compte de l'âge de l'enfant. Le traitement est essentiellement chirurgical. Il repose surtout sur le «Rechaussement-reposition» dont nous avons 48 cas, suivi d'un temps postérieur systématique, 6 semaines plus tard. Les résultats sont bons, moyens et mauvais, chacun, dans un tiers des cas. Les indications de l'astragalectomie réalisée seulement dans 3 cas devraient à notre avis être élargies au pied dont les déformations de l'astragale sont trop importantes, surtout si l'enfant est âgé.
    Notes: Summary We have studied 71 feet with Congenital Vertical Talus in 51 patients. The condition is characterised by two fixed deformities, equinus of the hindfoot with a vertical talus and dislocation of the mid tarsal joint due to malposition of the navicular with respect to the head of the talus. The forefoot is usually everted, but lay in inversion in 25% of our cases. The deformity must be recognised within a few weeks of birth, and the diagnosis is facilitated by radiographs taken in extreme dorsiflexion and plantarflexion. The radiographic appearances allow classification of the deformity into three groups which aid in the choice of the correct management. Treatment is by operation. We have performed 48 open reductions, followed by lengthening of the Achilles tendon six weeks later. Our results can be equally divided into good, fair and poor. We have excised the talus on three occasions only, but we feel that this operation may well be useful in the presence of marked deformity of the talus, particularly in the older child.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 23 (1989), S. 765-779 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Previous studies showed that natural coral implanted into bone tissue was gradually resorbed and progressively replaced by newly formed bone. The objectives of this study were to compare the fate of two Madreporian corals, Porites and Acropora, after implantation during 1 and 2 months into sheep and pig long bones. These materials are identical in composition (CaCo3) but differ in volume (49 ± 2%, 12 ± 4%, respectively) and mean size (250 vs. 500 μm) of porosities. The non-decalcified histological slices were observed under light microscopy. Implant resorption and new bone formation were quantified through an automatic image analysis system. Quantitative results showed that the larger the porosity volume, the greater was the coral resorption as well as the new bone apposition. Large differences were found between the two animal species. Histological findings were identical to those previously reported: implants were resorbed and progressively replaced by newly formed bone. Coral was found to be an osteoconductive biomaterial which acted as a scaffold for a direct osteoblastic apposition and consequently could be an interesting alternative to bone auto-, allo-, or xenografts.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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