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Histological and ultrastructural evaluation of Leeds-Keio ligament six years after implant A case report (1997)

Zaffagnini, S. ; Pasquale, V. De ; Montanari, C. ; [et al.]

Springer

Knee surgery, sports traumatology, arthroscopy 5 (1997), S. 89-94

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ISSN: 1433-7347

Keywords: Key words Arthroscopy ; Artificial knee ligament ; Leeds-Keio ; Anterior cruciate ligament ; Immunohistochemistry

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine , Sports Science

Notes: Abstract We examined by light and electron microscopy study a Leeds-Keio ligament removed from a patient 6 years and 4 months after implant following rupture. The new ligament presented an outer capsule made up of bundles of collagen fibres running mainly perpendicular to the long axis of the ligament. Septa were seen emerging from the capsule and composed of bundles of collagen fibres surrounding the bundles of Dacron fibres. Each thread of Dacron was surrounded by a layer of connective tissue containing periodic acid-Schiff (PAS)-positive cells. The bundles of collagen fibres making up the outer capsule, the septa and the layer of connective tissue surrounding the Dacron threads were positive for anti-type I collagen antibody. The rehabitated Leeds-Keio ligament presented a specific organization at the septa zone, showing a layer of collagen fibrils alternating with a layer of cells. Our remodelling findings suggest a shoelace effect of the artificial ligament. On the other hand, the presence of type I collagen could be responsible for the good functional behaviour of this composite system. In conclusion, the factors that play an important role in determining this remodelling process and its mechanical function are unknown.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s001670050033

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Effects of pulsed extremely-low-frequency magnetic fields on skin wounds in the rat (1988)

Ottani, V. ; De Pasquale, V. ; Govoni, P. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Bioelectromagnetics 9 (1988), S. 53-62

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ISSN: 0197-8462

Keywords: 50-Hz magnetic fields ; pulsed magnetic fields ; wound healing ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Physics

Notes: Rats with skin-wounds surgically created on their backs were exposed immediately after surgery and every 12 h thereafter to pulsed, extremely-low-frequency magnetic fields. The shape of the pulse was a positive triangle (50 Hz, 8 mT peak). The rate of healing of skin wounds was evaluated macroscopically and by light and electron microscopy at 6, 12, 21, and 42 days after the operation. A significant increase in the rate of wound contraction was found in rats treated with magnetic fields. Forty-two days after surgery all treated animals show fully closed wounds, while control rats at the same time intervals still lacked a final 6% of the wound surface to be covered. Treated rats showed earlier cellular organization, collagen formation and maturation, and a very early appearance of newly formed vascular network.

Additional Material: 7 Ill.