By Professor Friedrich Pauwels Dr. med., Dr. med. h. c., Dr. Ing. E. h. (auth.)
The contents of this publication are dependent nearly solely on merely anatomical researches. those have been prompted by way of questions posed in medical perform. the consequences are directed to practising surgeons. Their chronological series ends up in a step-by-step improvement of theoretical bases and to a revolutionary rejection of previous conceptions. particularly within the box of orthopaedic surgical procedure, a liable perspective is feasible neither with no sturdy anatomical wisdom, nor with no an idea of sensible relationships. W. Roux had already tested this and he sought after his works of practical anatomy to be thought of from this standpoint. He chiefly preoccupied himself with a uniform thought of useful variation. hence it really is comprehensible that the theories ofRoux shaped the root from which to begin. Our personal researches appeared in the beginning to corroborate the guidelines of Roux, no less than partially. this can be nonetheless obvious within the monograph pertaining to fractures of the femoral neck. Later it seemed that ST. KROMPECHER had made a step forwards within the subject of chondrogenesis whilst he deserted the shear concept postulated by way of Roux and held that compression was once the one potent stimulus for the forma tion of cartilage. The study about the therapeutic of fractures is predicated in part at the concept of KROMPECHER which used to be new at the moment. yet finally progressively more discoveries might now not be defined via this belief which used to be merely just a little assorted from the older theories (1. WOLF, W. Roux, W.
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Additional resources for Biomechanics of the Locomotor Apparatus: Contributions on the Functional Anatomy of the Locomotor Apparatus
Orthop. 1932. 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.
Because of the action of the effective tipping moment (R . Oa), the regeneration tissue is subjected to a tensile stress which causes a pseudarthrosis. Fig. 74. Diagram howing how an effective tipping moment tre e the regeneration ti ue (chain) in ten i n (al 0 ee ig. _--""-'---_ 145). Fig. 76 (21. 6. 28). Tensile stress has caused a widening of the clear zone and separation of the fracture surfaces. Fig. 77. Diagram to illustrate the stressing of the regeneration tissue by the "additional support" against the roof of the acetabulum.
Between the two extreme final stages, bony healing on one side and a mobile nearthrosis on the other, there are intermediate stages. These can be definitive. They are characterized by a more or less solid bonding of the fragments by connective tissue. They appear when the capital fragment finds a solid stop on its downwards path, that is to say, when the effective shearing force is eliminated by an "additional support". The support most frequently occurs because the lower corner of the head fragment consisting in the majority of cases of the remains of Adam's arch, hooks on to the neck fragment in the region of the lesser trochanter and there finds a solid block to its distal shift.
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.)