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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of orthopaedic surgery & traumatology 2 (1992), S. 195-199 
    ISSN: 1432-1068
    Keywords: Ankle ; Instability ; Surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Between 1975 and 1986, 75 reefings of the lateral ligament were performed for chronic instability of the ankle joint. 58 patients were reviewed with a mean follow up of 36 months (range 6 months to 6 and a half years). Surgery completly cured the instability in 4 out of 5 cases. In 6 patients, there is residual pain causing varying disability. Subtalar movement is always maintained, as well as ankle joint movement, save that in 6 cases it was slightly reduced. Results were excellent 18, very good 18, good 6, average 8, poor 4. In addition, four patients who originally had an excellent or very good result had a further severe sprain ankle with recurrence of joint laxity and instability. X Ray results are less satifactory as the laxity is partially controlled (mean joint opening 7°). But all laxities save one have been improved by surgery. The authors conclude that after failure of proprioceptive reeducation which must systematically be attempted, reefing of the lateral ligament must be preferred to ligamentoplasties using peroneus brevis which are more traumatic and less physiological.
    Notes: Résumé De 1975 à 1986, 75 remises en tension ligamentaire externe ont été réalisées pour instabilité chronique de cheville. 58 ont été revues avec un recul moyen de 36 mois (reculs extrêmes 6 mois à 6 ans et demi). L'intervention a contrôlé totalement l'instabilité 4 fois sur 5. Six patients gardent des douleurs plus ou moins invalidantes. La mobilité sous-astragalienne est constamment conservée, celle de la tibio-tarsienne également sauf dans six cas où elle est légèrement diminuée. Les résultats ont été excellents 18 fois, très bons 18 fois, bons 6 fois, moyens 8 fois, mauvais 4 fois. En outre, quatre patients dont le résultat initial était excellent ou très bon ont présenté secondairement une nouvelle entorse grave avec réapparition de la laxité et de l'instabilité. Les résultats radiographiques sont moins bons puisque la laxité n'est que partiellement contrôlée (baillement moyen 7°). Mais toutes les laxités sauf une ont été améliorées par l'intervention. Les auteurs concluent que, après échec de la rééducation proprioceptive qu'il faut tenter systématiquement, la remise en tension ligamentaire externe doit être préférée aux ligamentoplasties utilisant le court périonier latéral plus délabrantes et moins physiologiques.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0375-9474
    Keywords: Nuclear reactions
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 7 (1996), S. 683-690 
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: New percutaneous filling techniques are beginning to be used in bone tumour pathology, because they are less aggressive than surgery. The purpose of this study was to test percutaneous injectable bone biomaterials with a reproducible model. A closed cancellous bone defect was created in the distal femoral extremities of 34 rabbits. Filling was done by a percutaneous injection made on the medial side, after the defect had been hollowed by a lateral approach. Three situations were tested: unfilled, filled with orthopaedic cement, filled with a soft collagen-hydroxyapatite material. Three time intervals (2,4 and 8 weeks) were tested for the three situations. For the mixed hydroxyapatite-collagen material, each component was tested separately: the injectable collagen, and the hydroxyapatite powder. The quality of the defect was assessed by the variations of the defect area on sagittal sections. Bone formation in the defect was quantified for each group and time interval. A bone defect of reproducible size was obtained. Evolution of bone formation was different in each group. An unfilled defect was never completely filled by bone and the defect bone formation rate stayed between 9.9% and 15.1% without any statistical difference between the time intervals. The percutaneous injection of orthopaedic cement, which was progressive, was less complete than an opened surgical filling and explained a frequent low peripheral bone formation. A lower bone formation rate was observed in all the filled groups (orthopaedic cement, hydroxyapatite-collagen, hydroxyapatite and collagen) than in the control unfilled group. This study showed the use of bone biomaterials by an injectable percutaneous method, and a model to evaluate these materials is proposed.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: New percutaneous bone filling techniques are beginning to be used by radiologists in bone tumour treatment because they are less agressive than surgery. The possibility of fostering the production of new bone using an injection method by catheter has prompted us to make pure hydroxyapatite (HA) coated with collagen (coll). The aim of this study was to assess three kinds of beads of 100–200 μm size by an injectable method in the distal part of femurs in rabbit. Three implanted groups were divided randomly: HA + COLL. group (n: 19); COLL. group (n: 10); HA group (n: 9). At intervals of 2, 4 and 8 weeks after surgery, bone ingrowth was evaluated on low magnification microradiographs (×6.3) by an image analysing computer. This study has shown that bone formation induced by collagen in its isolated form is not as good as when associated with HA granules. At 4 weeks, a significant difference was observed between the three groups, with the lowest bone formation in the COLL. group. However, the amount of bone formation was small and needs to be improved.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Interventional radiology is beginning to be used in bone pathology. An injectable biomaterial Ethibloc*, composed of alcohol and a vegetal protein (zein), has been successfully used for percutaneous treatment of benign bone lesions. The reasons for this success remained unknown and needed to be understood. In this study, using a rabbit model, an evaluation was made of bone formation and tissue reaction during the first weeks after the injection of this biomaterial. Ethibloc* was injected percutaneously into bone defects in rabbit distal femurs. Three time intervals were studied: 2, 4 and 8 wks. The three control groups constituted unfilled, polymethylmethacrylate (PMMA), and alcohol. Undecalcified bone technique was used for a qualitative analysis and histomorphometric evaluation. A low bone formation was found which was less than in the control groups (PMMA and unfilled). The “Ethibloc group” was characterized by an early inflammatory reaction. Good clinical results obtained with Ethibloc* probably arose, after an initial vascular thrombosis, from a secondary bone reaction and spontaneous osteogenesis obtained after the disappearance of vascular or hyperpression reaction. © 1998 Chapman & Hall
    Type of Medium: Electronic Resource
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