Assertion: sacrum's segment | /r/CapableOf | fuse by age
Facets:
Source sentences:
text: Typically, the lateral epiphyses and costal elements fuse completely by age 22, the S3-S4 and S4-S5 segments fuse by age 22, the S2-S3 segment fuses by age 23, and the S1-S2 segment may not fuse until the fourth decade of life or later (3,4).