We are using onlay-transplantation of iliac bone crest on the hypoplasia maxilla base to elevate the affected ala base of the nose to the level of the other side. We use roentgencephalometry to determine criteria for transplantation of bone. We report the measurements and the results of the maxilla, with cleft lip and palate, on the roentgencephalometry. The measurements were made as follows. We applied contrast medium on the facial middle line and outerside of each ala nasi. We measured the distance between the ear rod and alae nasi, left and right, of 9 patients with cleft lip and palate and of 23 normal adults. The results are as follows. The measurements for 23 normal adults were of course in the normal range. Those for 8 patients out of 9 were in the normal range, but those for the remaining one were in abnormal range. Onlay-transplantation of iliac bone crest was performed for the abnormal case and a desired result was acheived.
