Bone Anatomy Flashcards Preview

MDEMO - Orthopaedics > Bone Anatomy > Flashcards

Flashcards in Bone Anatomy Deck (11)
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1
Q

which one is mature and immature:

woven or lamellar?

A

woven = immature

lamellar = mature

2
Q

when is woven produced ?

which condition is woven bone produced in?

A

when osteoblasts produce osteoid rapidly - which occurs in some metabolic bone disease with high bone turnover: Paget’s

3
Q

fetal bones: woven or lamellar?

A

woven

4
Q

when are fetal woven bones replaced by lamellar?

A

third trimester

5
Q

what % of adukt skeleton is made up of cortical bone?

A

80%

6
Q

function of osteoblasts?

A

(make bone)
bone forming cells
make osteoids - type 1 collagen

7
Q

function of osteocytes?

A

(are bone)
responsible for calcium and phosphate metabolism

mature cells

8
Q

function of osteoclasts?

A

(destroy bone)

resorb bone

9
Q

how can you tell on an Xray if they are skeletally mature or immature?

A

presence of growth plates

10
Q

what is endochondral ossification?

what is intramembranous ossification?

A

production of long bones

production of flat bones (skull)

11
Q

what is achondroplasia?

A

dwarfism (abnormal endochrondral ossification)

normal spine but long lbones are short