Slide 1:Computer Modeling in Biomechanics Applications

Thompson Chris Bylin Pham ME 580

Slide 3:Applications and Purpose

Non invasive Little interference with human body Useful in simulation of bone fractures, internal fixations/implants Help to understand how musculoskeletal structures react to external loads/forces Train physicians and surgeons Assists in complex procedures like plastic surgery, surgery for trauma, reconstructive surgery

Slide 4:Simulation of Bone Fractures/Implants

Allow surgeons to learn how to fix fractured bones without using expensive plastic models 3d models are created from 2D slices Surgeons locate fracture in 3D space and use existing surgical techniques to fix the virtual fracture. http://www.ntu.edu.sg/home/assourin/VirBones.html

Slide 5:F.E.A. Applications

Examine mechanics of musculoskeletal and tissue structure Models are used for designing and analyzing component performance

Slide 6:Assisted Surgery

Greater degree of speed, accuracy, and precision Gives doctors detailed info Helps doctors to make smaller incisions instead of traditional larger openings. Less invasive means: faster recovery less bleeding less pain Computer assisted surgery uses the computer system cameras software specialized surgical instruments

Slide 7:Process of surgery

CT Scan or MRI Model building Pre OP planning Assisted Operation

Slide 8:2D Image Capture

MRI CT Scan

Slide 9:Model Building/Analysis

http://www.3dscience.com Developed from patient specific geometry obtained from scans

Slide 10:Application of Computer Aided Surgery

Hip replacement Surgery One of most commonly performed orthopedic surgeries Around 300,000 of these types of surgeries in U.S. every year Hip Osteotomy Realignment of bones of the hip joint. Performed on femur, pelvis or both

Slide 11:Pre Op

With these models surgeons can optimize the treatment of patients by allowing for testing of different surgical solutions

Slide 12:Computer Aided Navigation system

http://jhuapl.edu/techdigest/td2503/Armand.pdf

Slide 13:Other Examples of Current Systems

HipNav Image Overlaying

Slide 14:HipNav

Developed for acetabular implant placement

Slide 15:HipNav

Pre-Operative CT scan determines implant size and placement Range of motion simulator determines where interferences would occur with the implant and finds the “optimal cup position” for patient Also performs kinematic analysis to find a safe range of motion Optotrak targets are attached to surgical tools to track hip and implant locations

Slide 16:Image Overlaying

Superimposes digital images over real objects Gives doctor “X-ray vision” Digital object appears at exact location regardless of patient position

Slide 17:Image Overlaying

Focuses on intraoperative and surgical guidance The navigation system and origin pt are crucial to locate the patient in reference to the model

Slide 18:Questions??