Fractures (ch9) Joint Arthroplasty (ch10) Flashcards
What are classification of fractures?
Linear Oblique Compression Avulsion Impaction Stress
What type of fracture occurs when one fragment is driven into another?
Impaction
Common in tibial plateau fractures
What type of fracture is caused by a sudden muscle contraction or pulling by a ligament in which the area of a bone where the ligament attaches is pulled away from the rest of the bone?
Avulsion
common in fifth metatarsal during inversion
What type of fracture occurs when the bone is compressed beyond its limits of tolerance? Where is this type of fracture mostly found?
Compression
Found in the vertebral bodies as a result of a flexion injury
What type of fracture runs parallel to the bone?
Linear
What type of fracture runs perpendicular to the long axis of a bone? What causes them?
Transverse
Caused by tensile/ bending forces
What causes a stress fracture?
repeated low force trauma
Common in athletes and military personnel
What is an open fracture?
fractures that are exposed to the external environment
What is a closed fracture? what usually accompanies a closed fracture?
Does not break the skin
What accounts for the largest number of fractures among the elderly? What are they associated with?
Osteoporosis
Poor balance & falls
What is the most common cause of fractures?
trauma
Greenstick and torus fractures are most common in?
Children
Primary healing will occur if?
Intramedullary vasculature is intact
There is cortical contact
Fracture fixation provides compression across the fracture, reduces the interfragmentary gap to less than 1 mm, and eliminates motion at the fracture site
When does secondary healing start?
with formation of a fibrous callus around the fracture site and ends with its conversion to bone
What occurs during the inflammatory stage of bone healing?
Formation of a hematoma at the injury site
Inflammatory cells invade the area
What occurs during the repair stage of bone healing?
Characterized by the differentiation of mesenchymal stem cells into the cell types necessary for tissue restoration
Soft callus is formed, then mineralized by osteoblasts, forming hard callus
ends when the fracture is clinically stable
What occurs during the remodeling stage of bone healing?
Osteoblasts and osteoclasts replace the immature bone with mature, organized bone
Fully healed fracture is often stronger than the surrounding bone
What risk factors can delayed healing?
Mellitus Smoking Long-term steroid use NSAIDs and other medications Poor nutrition
How can e-stim help w/ bone healing?
Improve tissue healing
Transcutaneous electrical nerve stimulation (TENS) – noninvasive, well tolerated pain reliever
Electrical stimulation - high voltage pulsed current (HVPC) used to control edema
Neuromuscular electrical stimulation (NMES) is often used to improve strength and to retard the effects of disuse atrophy
Stimulate the biological processes involved in osteogenesis
Weight bearing progressions during bone healing &
Assistive devices to be used
Gait Training - start with non-weight bearing (NWB), advance through toe-touch weight bearing (TTWB), to partial weight bearing (PWB), to full weight bearing as tolerated
Assistive devices - wheelchairs, walkers, and crutches to assist with mobility to reachers who enable a person to grasp something that is placed beyond his or her reach
ROM progressions
Gravity progressions
PROM> AAROM> AROM
Gravity eliminated> Gravity assisted > Against Gravity
What is arthrofibrosis?
increased fibrous tissue in a joint that limits ROM
What is arthropathy?
any disease or abnormal condition affecting a joint
What is arthrodesis?
The surgical fusion of the bony surfaces of a joint w/ internal fixation such as pins, plates, nails, or bone graft
What is arthroplasty?
any reconstructive joint procedure with or without an implant that is designed to relieve pain and restore motion
What is a hemiarthroplasty?
involves removing and replacing only one side of the joint