성장판은 동시에 닫히지 않고 닫히는 순서가 있음.

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관련 논문

https://www.binasss.sa.cr/bibliotecas/bhm/mar23/38.pdf

https://pmc.ncbi.nlm.nih.gov/articles/PMC5782864/

https://pmc.ncbi.nlm.nih.gov/articles/PMC7581430/

Secondary ossification center induces and protects growth plate structure - PMC

https://jksronline.org/DOIx.php?id=10.3348/jksr.2019.80.3.503

성장판 닫힘 관련 논문.pdf

3.87MB

206개의 뼈 성장

나이에 따라 성장판이 닫히는데, 모든 뼈의 성장판은 동시에 닫히지 않는다. 

상지의 성장판이 닫히는 순서

- 쇄골, 상완골, 요골, 척골은 거의 20세가 되어야 닫힌다. 

하지의 성장판이 닫히는 순서

- 골반은 20세가 되어야 성장판이 닫힌다. 

- 경골의 성장판이 13세에 가장 빨리 닫힌다. 

참고) 뼈에 대한 이해

Bone

􀃎 Adult human skeleton has 206 bones.

􀃎 Babies born with ~ 300 bones but fusion occurs as a child develops.

􀃎 99% of bodies calcium is in bone.

􀃎 80% of bone tissue by weight is minerals.

􀃎 Longest bone (femur)

􀃎 Smallest bone (stapes)

􀃎 Males have slightly thicker and longer legs and arms

􀃎 Females have a wider pelvis and a larger pelvic cavity

Bone groups

􀃎 Axial skeleton (80 bones)

􀁺 skull (29 bones)

􀁺 thorax (25 bones)

􀁺 vertebrae (33 bones)

􀁺 Auditory ossicles

􀁺 Hyoid bone

􀃎 Appendicular skeleton (126 bones)

􀁺 pectoral girdle (4 bones)

􀁺 upper extremity (60 bones)

􀁺 lower extremity (60 bones)

􀁺 and pelvic girdle (2 bones)

Long bones

􀃎 Round bones comprising:

􀁺 diaphysis - shaft

􀁺 epiphyses - 2 expanded ends

Bone Structure and Growth

􀃎 Ossification - processes of bone formation.

􀁺 Osteoblasts - cells that form the bone matrix. They transform into

􀁺 Osteocytes - cells isolated inside the mineralized bone matrix.

􀁺 Osteoclasts - cells important to bone remodeling.

Types of Bone

􀃎 Cancellous (spongy) bone - less dense bone tissue found at the epiphyses of the long bones and in axial bones, such as the skull. 30-90% porosity.

􀃎 Cortical (compact) bone - tissue with high proportion of bone. 5-30% porosity.

Anisotropy

􀃎 All bone is anisotropic (i.e. its mechanical property changes when loads are applied in different directions).

Bone: Mechanical properties

􀃎 Most important properties are strength and stiffness of bone.

􀃎 Fractures occur when the bone is loaded to failure.

􀃎 Compression fractures are commonest in cancellous bone (e.g. fractured skull)

􀃎 Bending and torsional fractures are commonest in cortical bone (e.g. broken tibia).

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