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HBS 5-2-K4 Describe the types of bone fractures.
Terms in this set (11)
Bones break into many fragments. Particularly common in the aged, whose bones are more brittle.
Bone is crushed. Common in porous bones (osteoporotic bones).
Broken bone portion is pressed inward. Typical of skull fracture.
Broken bone ends are forced into each other. Commonly occurs when one attempts to break a fall with outstretched arms.
Ragged break occurs when excessive twisting forces are applied to a bone. Common sports fracture.
Bone breaks incompletely, much in the way a green twig breaks. Common is children, whose bones are more flexible than those of adults.
Stages in the healing of a bone fracture
(1) hematoma forms (2) fibrocartilage callus forms (3) bony callus forms (4) bone remodeling
blood vessels are ruptured when the bone breaks, blood filled swelling occurs.
Fibrocartilage callus forms
Contains cartilage matrix, some bony matrix, and collagen fibers to act as a "splint" for a broken bone, closing the gap. (soft callus)
Bony callus forms
As more osteoblasts and oseoclasts migrate into the area and multiply, the fibrocartilage callus is gradually replaced by spongy bone. (hard callus)
Bony callus is remodeled to form strong permanent patch.
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