[The alcaline serumphosphatase activity from adult and children after osteotomies (author's transl)].

Alcaline phosphatase activities in the Sera from 50 children of the age of 2-9 years were determined after intertrochanteric osteotomies. A significant decrease of enzymatic activity was to be seen, in contrast to the adult, where a slight increase of alcaline serum-phosphatase activity during bone healing is known. The possibility of reduced enzyme production caused by the postoperative immobilisation of the children is discussed.