1.  Have you ever broken a bone?  Which one?  How long did it take to heal? BELLWORK

2. 11/5/13 FRACTURES AND HEALING

3.  Fracture = Broken bone  Healing time depends on which bone it is, and severety of fracture BONE FRACTURES

4.  Open (compound) – broken bone penetrates skin  Closed (simple) – bone does not penetrate skin OPEN VS. CLOSED

5.  Completely through bone at a right angle to axis of bone  Associated with trauma TRANSVERSE

6.  Occurs at any other angle than a right angle OBLIQUE FRACTURE

7.  Spiral fractures are caused by twisting a bone excessively  Common in sports fractures SPIRAL FRACTURE

8.  Incomplete break to the convex surface of the bend in the bone  Common in children because their bones are more flexible GREENSTICK

9.  Bone breaks into many fragments  Common in older age due to brittle bones  High impact or crushing injury COMMINUTED

10.  Broken bone ends are forced into each other  Common in fall injuries when one tries to break their fall with outstretched arms IMPACTED

11.  Incomplete  Usually caused from repeated stress/pressure to tibia or fibula FISSURE/HAIRLINE

12.  1. Blood vessels rupture when the bone breaks creating a blood filled swelling called a hematoma.  2. Soft callus forms from some cartilage matrix, bone matrix, and collagen fibers.  3. Osteoblasts (form bone) and osteoclasts (dissolve bone cell) form bony callus.  4. Bony callus is remodeled by osteoclasts. FRACTURE HEALING

13.  Put the following steps in order and describe what happens at each step.  Bony callus  Remodeling  Soft callus  Hematoma EXIT TICKET