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STUDY OF 536 BONES WITH SPECIAL REFERENCE TO PNEUMATIZATION

C. C. ROE JACKSON, M.D., D.SC. (MED.)

Arch Otolaryngol. 1938;28(5):748-767.

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CLASSIFICATION OF ADULT MATERIAL

Four examples from the previous section have been selected to represent phases of normal pneumatization. The word phase is used in contradistinction to such a term as stage because it is intended to imply absence of strictly delimiting boundaries. Figure 4 B shows the picture at birth; representatives of this phase will henceforth be referred to as group I. Figure 5 B shows the normal development one finds at the approximate age of 2 years; representatives of this phase will be referred to as group II. Figure 5 F reveals the phase which has extensive pneumatization except in the apex of the pyramid, where there is none; representatives of this phase will hereafter be called group III. Complete pneumatization of the pyramid (cells in the apex) is shown in figure 6F; representatives of this phase show no arrest and henceforth will be group IV.

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Author Affiliations
CLEVELAND

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