RT Journal Article
T1 Development and growth of the human fetal sacroiliac joint revisited: a comparison with the temporomandibular joint
A1 Hyun Kim, Ji
A1 Jin, Zhe-Wu
A1 Hayashi, Shogo
A1 Murakami, Gen
A1 Abe, Hiroshi
A1 Rodríguez Vázquez, José Francisco
AB The human fetal sacroiliac joint (SIJ) is characterized by unequal development of the paired bones and delayed cavitation. Thus, during the long in utero period, the bony ilium becomes adjacent to the cartilaginous sacrum. This mor­phology may be analogous to that of the temporomandibular joint (TMJ). We examined horizontal histological sections of 24 fetuses at 10–30 weeks and compared the timing and sequences of joint cartilage development, cavitation, and ossification of the ilium. We also examined histological sections of the TMJ and humeroradial joint, because these also contain a disk or disk-like structure. In the ilium, endochondral ossification started in the anterior side of the SIJ, extended posteriorly and reached the joint at 12 weeks GA, and then extended over the joint at 15 weeks GA. Likewise, the joint cartilage appeared at the anterior end of the future SIJ at 12 weeks GA, and extended along the bony ilium posteriorly to cover the entire SIJ at 26 weeks GA. The cavitation started at 15 weeks GA. Therefore, joint cartilage development seemed to follow the ossification of the ilium by extending along the SIJ, and cavitation then occurred. This sequence “ossification, followed by joint cartilage formation, and then cavitation” did not occur in the TMJ or humeroradial joint. The TMJ had a periosteum-like membrane that covered the joint surface, but the humeroradial joint did not. After muscle contraction starts, it is likely that the mechanical stress from the bony ilium induces development of joint cartilage.
PB Korean Association of Anatomists
SN 2093-3665
YR 2023
FD 2023-02-15
LK https://hdl.handle.net/20.500.14352/108974
UL https://hdl.handle.net/20.500.14352/108974
LA eng
NO Kim JH, Jin ZW, Hayashi S, Murakami G, Abe H, Vázquez JFR.  Development and growth of the human fetal sacroiliac joint revisited: a comparison with the temporomandibular joint.  Anat Cell Biol 2023;56:252-258.   https://doi.org/10.5115/acb.22.189
DS Docta Complutense
RD 5 may 2025