Musculoskeletal & Fractures, Amputations Flashcards
______ is composed of cells, protein matrix, and mineral deposits
Bone
Three basic cell types of bone are?
Osteoblasts
Osteocytes
Osteoclasts
–bone forming cells, secrete bone forming cells
osteoblasts
–mature bone cells, help with bone maintenance
osteocytes
–bone absorption cells, dissolving and reabsorbing bone
osteoclasts
t/f: bone development happens more rapidly in a kids than an adult, and the bone healing process is better in kids
true
bone regrowth slows at ____ years of age
physical activity helps bone growth
20
t/f: nutrient absorption is really important
hormones are really important for bone growth
true
______ = Bone formation
Osteogenesis
______and ______ – acts to stimulate bone formation and remodeling
Physical activity, weight bearing
Good diet is necessary for bone health – ______ mg of calcium is needed every day to maintain bone health
1500
___________ happens in four areas:
Bone marrow
Bone cortex
Periosteum
External soft tissue
Fracture healing
t/f: a fracture is a break
true
Bone marrow –where ______ are formed
osteoblasts
Bone cortex –where new ______ are formed
osteons
Periosteum –where __________________ is formed, formed through intramembranous ossification, this happens peripheral to the fracture, where cartilage is formed through endochondral ossification
hard callous or fibrous tissue
________ tissue –the tissue around the bone near the break where a bridging callous forms and it provides stability to the fractured bones
External soft
How many stages of healing are there in bone healing?
six
Give the order of the stages of bone healing
Stage 1: Hematoma Formation
Stage 2: Hematoma to Granulation Tissue
Stage 3: Callus Formation
Stage 4: Osteoblastic Proliferation
Stage 5: Bone Remodeling
Stage 6: Bone Healing Completed
___________________–generally a lot of pain, forms within 72 hours usually, a lot of bleeding possibly [bones are very vascularized], vasoconstriction occurs, cytokines are released and they trigger angiogenesis which is the growth of new blood vessels,
Stage 1: Hematoma Formation (aka the inflammatory stage)
Stage 2: Hematoma to Granulation Tissue -___________after the injury, granulation tissue invades the hematoma and starts forming fibrocartilage which is like the building block
3 days to two weeks
– due to vascular and cellular proliferation, fracture site is going to be surrounded by new vascular tissue and this is known as a _____
Stage 3: Callus Formation
–callous is turned into bone, this takes __________
Stage 4: Osteoblastic Proliferation, three to eight weeks
– starts 4-6 weeks after breaking a bone and can continue all the way up to a year, your dead bone or necrotic bone is being removed by osteoclasts and you are reshaping and replacing the new bone, they are going to do repeated X-rays to see how the growth is going along
Stage 5: Bone Remodeling