Detection of numerous CC and Cc membranes in the femoral condyle

Copf, F.; Czarnetzki, Alfred; Copf, P.

doi:10.1007/bf02446237

Cited by 4 publications

(2 citation statements)

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“…Essential steps in this direction have been initiated two decades ago with modern prototypes of bio-analogue prosthesis for humans [ 13 - 16 ] based on preceding experiments with dogs, which demonstrated that the spongiosa material of bones can actually be incorporated and used to support shock absorption in the environment of the prosthesis ([ 17 ] and application of this concept to the design of innovative prosthesis [ 18 ]). However today, with traditional artificial joints, the bond between the bone and the prosthetic material still frequently breaks down and fatigues and fragments of wear debris may cause inflammatory reaction.…”

Section: Challenges For Prosthesis Researchmentioning

confidence: 99%

Nano-Material Aspects of Shock Absorption in Bone Joints

Tributsch

Copf²,

Copf³

et al. 2010

TOBEJ

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This theoretical study is based on a nano-technological evaluation of the effect of pressure on the composite bone fine structure. It turned out, that the well known macroscopic mechano-elastic performance of bones in combination with muscles and tendons is just one functional aspect which is critically supported by additional micro- and nano- shock damping technology aimed at minimising local bone material damage within the joints and supporting spongy bone material. The identified mechanisms comprise essentially three phenomena localised within the three–dimensional spongy structure with channels and so called perforated flexible tensulae membranes of different dimensions intersecting and linking them. Kinetic energy of a mechanical shock may be dissipated within the solid-liquid composite bone structure into heat via the generation of quasi-chaotic hydromechanic micro-turbulence. It may generate electro-kinetic energy in terms of electric currents and potentials. And the resulting specific structural and surface electrochemical changes may induce the compressible intra-osseal liquid to build up pressure dependent free chemical energy. Innovative bone joint prostheses will have to consider and to be adapted to the nano-material aspects of shock absorption in the operated bones.

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Section: Challenges For Prosthesis Researchmentioning

confidence: 99%

Nano-Material Aspects of Shock Absorption in Bone Joints

Tributsch

Copf²,

Copf³

et al. 2010

TOBEJ

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“…Mit zunehmen dem Abstand vom Gelenk kommt es in den Enden der langen Knochen zu einer Biegebeanspruchung. Der Ver lauf der Spongiosatrabckel lässt hier ebenfalls eine trajek torielle Ausrichtung erkennen [Roesler, 1987; [Copf et al, 1989[Copf et al, ,1990a.…”

Section: Introductionunclassified

Die CCL-Tensula im Skelettsystem als möglicher Teil eines hydrodynamisch wirkenden Faktors

Copf¹,

Czarnetzki²,

Lierse³

et al. 1991

Cells Tissues Organs

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Previous morphological studies on human bone have demonstrated that veil-like structures (‘tensulae’) occur in highly stressed regions i. e. the interface between cartilage and bone. In the present report we describe the distribution of tensulae within various types of human bone by means of scanning electron microscopy and light microscopy. Tensulae were predominately located within bone tissue adjacent to mineralized cartilage. The surface diameter of tensulae ranged from minimal 50 to maximal 400 µm. Occasionally, collagen fibers extended from the interface between cartilage and bone to tensulae. Frequently, the latter were attached to fat cells as well as bone marrow cells. An elemental analysis of tensula revealed high levels of calcium and phosphorus of equal concentrations. However, bone tissue contained higher levels of calcium compared to phosphorus. Additionally, a monoclonal antibody was generated by immunizing rats with bone marrow of mice. Within bone tissue this monoclonal antibody selectively stained membrane-like structures which were clearly identified as tensulae. From our investigations we conclude that the function of tensulae in bone may be to absorb stress in regions where large forces are applied.

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