Breaks in the diaphysis of a bone are spoken of as fractures of the shaft, and to be still more exact, it is stated whether of the upper, middle, or lower third.
Osteomyelitis nearly always begins in the diaphysis of the long bones, usually near the epiphyseal line.
The union of the epiphysis to the diaphysis commences during puberty, hence these fractures are less common in childhood than after the ages of eleven or twelve.
One of the peculiarities of the lesion is that it involves the end of the diaphysis or rather the junction of the diaphysis and the cartilage.
As the result of the lack of bone formation and the consequent weakening of the corticalis and the spongiosa, frequently a separation of the diaphysis from the epiphysis results.
This was no doubt due to the infrequency of extension of the comminuted fractures beyond the junction of diaphysis and epiphysis.
It is usually accompanied by fracture of the diaphysis of the fibula (Fig.
Sometimes the separation is compound, the diaphysis protruding through the skin.
On its under aspect is a cup-like depression into which the central pyramidal-shaped portion of the diaphysis fits.
The end of the diaphysis may be palpated through the skin in front.
In compound separations of epiphysis, the end of the diaphysis may be pushed through the skin.
The age of the patient, the mode of injury, the finding of the smooth broad end of the diaphysis in the popliteal space or on the front of the thigh, according to the displacement, usually serve to establish the diagnosis.
As a rule the epiphysis is not completely separated from the diaphysis, the common lesion being a separation along part of the epiphysial line, with a fracture running into the diaphysis (Fig.
The upper end of the diaphysis forms a projecting ridge which may be felt below and in front of the acromion.
It is seldom pure, a portion of the diaphysis usually being broken off and remaining attached to the epiphysis.
Tuberculous foci in the bones are met with chiefly in the lower end of the diaphysis of the humerus; in children, the epiphyses are so small that the ossifying junction is intra-articular.
Partial Separation of Epiphysis, with Fracture running 29 into Diaphysis 9.
In the majority of cases union takes place satisfactorily by the formation of callus in the spongy tissue of the diaphysis and on the deep surface of the periosteum.
The maximum thickening and tenderness usually correspond to the junction of the diaphysis with the epiphysis, and the swelling tails off gradually along the shaft.
The diaphysis is also nourished by numerous blood vessels from the periosteum, which penetrate the cortex through the Haversian canals and anastomose with those derived from the nutrient artery.
The separation usually takes place through the young bone of the ossifying junction, and the surfaces of the diaphysis and epiphysis are opposed to each other by irregular eroded surfaces bathed in pus.
Suppuration is rare, disjunction of the epiphysis from the diaphysis common.
In consequence of the interference with nutrition occasioned by these changes atrophy and fatty degeneration of the cartilage-cells occur, and they form between the epiphysis and diaphysis a necrosed mass which irritates the living bone.
Showing shortening of bone, owing to a lateral approximation of the diaphysis because of muscular contraction.
Fragilitas of the bone probably exists in many cases when fracture of its diaphysis occurs.
Contraction of muscles also tends to exert traction upon a bone so fractured, resulting in a lateral approximation of the diaphysis and thus preventing union because the broken surfaces are not in proper contact.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "diaphysis" in a variety of sentences. We hope that you will now be able to make sentences using this word.
