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The Ulnar Epiphyseal Cartilage Width in Normal and Rachitic Calves and Its Use Compared to Other Methods of Detecting Rickets

Dairy Husbandry Research Branch, Agricultural Research Service, USDA, Beltsville, Maryland

ABSTRACT

The use of X-ray photographs of the ulnar epiphyseal cartilage to demonstrate the presence of rickets in calves was first mentioned in 1938 by investigators from Pennsylvania State College (1). More recently this technique has been used by the present investigators (4, 5, 6). However, to date it has been used only to differentiate between normal and rachitic calves.

It appeared desirable to make a detailed study of the normal pattern of ossification of the epiphyseal cartilage of the ulna in calves similar to studies made on the ossification centers in human wrists and hands (2). A normal pattern for calves would thus be obtained. This would make it possible for anyone to compare any roentgenogram with that of a normal Avhich had been established for that particular breed, sex, and age. This would be used as an aid to a person desiring to use this technique in the field for the detection of rickets.