Biomedical Engineering Workshop Bone Implant Biomedical Engineering Biology

Biomedical Engineering Workshop Bone Implant

Biomedical Engineering Biology Engineering ²Pace makers ²Blood sugar testers ²Imaging devices ²Bone implants Math

Bone: Form Follows Function ²Function ▫ Movement ▫ Support ▫ Protection ²Properties ▫ 206 bones ▫ Held by muscles/ligaments ▫ Strong ▫ Self repairing

Bone health is important ²Two types of bone ▫ Compact ▫ Spongy ²Signs of healthy bone ▫ Bone mineral ▫ Bone density ²Common bone disease: osteoporosis ▫ Low bone density ▫ High risk for fractures ▫ Most prevalent in women

5 Methods to fix broken bone ²Casting ▫ Plaster of paris ▫ Fiberglass ²Metal implants ▫ Plates and screws ▫ Pins ▫ Intramedullary rods

Bone Implant Design

Bone Implant Design ▫ ▫ ▫ Health of the bone Material of the implant Location to implant Length of surgery Size of surgery opening

Engineering Design 1. What are the problems? 2. What are the possible solutions? 3. How can the solutions be better?

Fix This Broken Bone Leave 1 in. gap Fake Broken Bone Tibia Broken Tibia

Be a surgeon Be a bone tissue engineer 1. Patient with normal bone 2. Patient with osteoporotic bone 1 inch Osteoporosis Normal

Testing = Finding ways it can fail

Bend Test

Observations

Torsion Test

Observations

Compression and Tension Test

Observations

If it failed… How can it be redesigned? Implant Design before testing Implant Design after testing

Lessons Learned

Recap ²Biomedical engineering = biology + math + engineering ²Bone = support + protection + movement ²Bone health is important ²Bone can break ²Broken can be fixed by surgeons and engineers