By Professor Friedrich Pauwels Dr. med., Dr. med. h. c., Dr. Ing. E. h. (auth.)
The contents of this ebook are dependent nearly completely on basically anatomical researches. those have been influenced through questions posed in scientific perform. the implications are directed to working towards surgeons. Their chronological series results in a step-by-step improvement of theoretical bases and to a innovative rejection of previous conceptions. particularly within the box of orthopaedic surgical procedure, a dependable perspective is feasible neither with out strong anatomical wisdom, nor with no an idea of practical relationships. W. Roux had already proven this and he sought after his works of practical anatomy to be thought of from this viewpoint. He primarily preoccupied himself with a uniform thought of sensible version. hence it truly is comprehensible that the theories ofRoux shaped the foundation from which to begin. Our personal researches appeared before everything to corroborate the guidelines of Roux, not less than partly. this can be nonetheless obtrusive within the monograph touching on fractures of the femoral neck. Later it seemed that ST. KROMPECHER had made a step forwards within the topic of chondrogenesis whilst he deserted the shear idea postulated by way of Roux and held that compression used to be the single potent stimulus for the forma tion of cartilage. The learn in regards to the therapeutic of fractures is predicated in part at the thought of KROMPECHER which was once new at the moment. yet eventually an increasing number of discoveries may possibly now not be defined by way of this perception which used to be basically a bit of diversified from the older theories (1. WOLF, W. Roux, W.
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Additional info for Biomechanics of the Locomotor Apparatus: Contributions on the Functional Anatomy of the Locomotor Apparatus
A Mechanical Problem prevents further displacement of the head fragment distally. The direction of the compressive force R acting on the femoral head does not intersect the support but is medial in relation to it. This causes an effective tipping moment which tends to tum the head fragment in a clockwise direction (Fig. 74). The fracture surfaces tend to break up one from the other and thus a tensile force acts on the regeneration tissue. The result is that tight connective tissue must form in the direction of the tension.
34 Fig. 59 The Fracture of the Femoral Neck. A Mechanical Problem Fig. 60 Eburnated bone Connective tissue organized tightly Fig. 61. The femoral neck is transformed into a wide band of connective tissue. The Fracture of the Femoral Neck. A Mechanical Problem Fig. 33) The effective shearing force is also able to destroy healthy bony tissue the diameter of which is much greater than that of the bony trabeculae. This is demonstrated by a case the X -rays of which were put at my disposal by FROND of Osnabriick.
The action of the nail on the mechanical stressing of the regeneration tissue will now be more closely defined, taking account of its technical capacity. To this end, we shall analyse its role and its influence on the mechanical stressing of the regeneration tissue in the types offracture described above. In type 1 fractures, the whole of the fracture surface is subjected to effective compression. The acting forces press the fragments one against the other and no damaging forces arise that would endanger the formation of the bony regeneration tissue or the position of the fragments.
Biomechanics of the Locomotor Apparatus: Contributions on the Functional Anatomy of the Locomotor Apparatus by Professor Friedrich Pauwels Dr. med., Dr. med. h. c., Dr. Ing. E. h. (auth.)