In age estimation from the skull, how can age be inferred when the sagittal and coronal sutures are involved?

• A. The coronal suture will be fused first as age increases
• B. The lambdoid suture fused indicates age over 60
• C. The sagittal suture will be fused in a person over the age of 35. If older, the coronal suture will be fused
• D. Sutures do not fuse with age

Answer: (C)

Suture fusion with age follows a general pattern: cranial sutures progressively ossify and lose their fibrous joints as a person ages. In many individuals, the sagittal suture shows fusion in middle adulthood, around the mid-30s, and if the person is older still, the coronal suture may be fused as well. This sequence—sagittal fusion indicating at least middle age, with coronal fusion suggesting an older age—is why the statement describing sagittal fusion by about 35 years and possible coronal fusion thereafter is the best fit. The other options don’t align with typical aging patterns: the coronal suture is not known to fuse first, lambdoid fusion as a precise age marker is unreliable, and sutures do indeed fuse progressively with age. Keep in mind, though, that there is considerable individual variation, so sutural data are most informative when combined with other age indicators.