Ossification center lower limb Flashcards
When do the metatarsals first appear?
9-12 weeks in utero
When does the calcaneus first appear?
These first appear between 4-7 months in utero
When does the talus first appear?
The talus first appears 6 months in utero.
When does the cuboid first appear?
The cuboid first appears at birth.
When does the lateral cuneiform first appear?
At year 1
When does the medial cuneiform first appear?
At year 2
When does the intermedate cuneiform first appear
At year 3
When does the navicular first appear?
The navicular is the last bone in the foot to appear and appears at 3 years.
When does the shaft of the tibia first appear?
when does it fuse?
7th week in utero
Puberty
When does the proximal end of the tibia appear?
When does it fuse?
Birth
16-18 years
When does the distal end of the tibia appear?
When does it fuse?
Year 1
15-17 years
When does the shaft of the fibula appear and when does it fuse?
Appears during week 8 in utero
Fuses at puberty
When does the distal end of the fibula appear and when does it fuse?
Appears during year 1 and fuses 15-17 years.
When does the proximal end of the fibula appear and when does it fuse?
Appears during year 3-4
Fuses at 17-19 years.
Note that in the fibula it is the distal head that appears first, in the tibia it is the proximal.
Which bone has an atypical fusing pattern?
The proximal end of the fibula is the last to appear and the last to fuse.
Normally the earlier the bone appears, the later it fuses.
When does the shaft of the femur appear?
when does it fuse
7th fetal week
Fuses at puberty
When dos the distal extermity of the femur appear
When does it fuse?
Appears at birth
Fuses at 16-18 years
When dos the head of the femur form
When does it fuse
Forms at 6 months
Fuses at 17 years
When does the greater trochanter form and when does it fuse?
Forms at 4 years and fuses at 16 years
When does the lesser trochanter appear and when does it fuse?
Appears at 12-14 years and fuses at 15 years.
When does the patella ossify
Between years 3-6
When do all three bones of the pelvis fuse?
13014th year
When does the ilium develop?
8th week
When does the ischium develop?
4th month
When does the pubis form?
4th-5th week.
How many vertebrae are fused to make up the coccyx?
4 fused vertebrae.
