Dislocations at the knee are of a milder character than those of the elbow,owing to the compactness and regularity of the joint;and hence it is more readily dislocated and reduced.Dislocation generally takes place inward,but also outward and backward.The methods of reduction are-by circumflexion,or by rapid excalcitration,or by rolling a fillet into a ball,placing it in the ham,and then letting the patient's body suddenly drop down on his knees:this mode applies best in dislocations backward.Dislocations backward,like those of the elbows,may also be reduced by moderate extension.
Lateral dislocations may be reduced by circumflexion or excalcitration,or by extension (but this is most applicable in dislocation backward),but also by moderate extension.The adjustment is what is common in all.If not reduced,in dislocations backward,they cannot bend the leg and thigh upon one another,but neither can they do this in the others except to a small extent;and the fore parts of the thigh and leg are wasted.In dislocations inward they are bandy-legged,and the external parts are atrophied.But,in dislocations outward,they incline more outward,but are less lame,for the body is supported on the thicker bone,and the inner parts are wasted.The consequences of a congenital dislocation,or one occurring during adolescence,are analogous to the rule formerly laid down.
