vims labs functional anatomy functional anatomy muscle & joint mechanics muscle & joint...
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VIMSVIMS LabsLabs• Functional anatomyFunctional anatomy• Muscle & joint mechanicsMuscle & joint mechanics• Bone/cement/stem stressesBone/cement/stem stresses• EF adjustability & rigidity EF adjustability & rigidity • Implant design & testingImplant design & testing• Operative planningOperative planning
Biomechanics of Biomechanics of TOSTOS
• Neurogenic thoracic outlet syndrome Neurogenic thoracic outlet syndrome (nTOS) is controversial(nTOS) is controversial
• TO Area (TOA) has yet to be defined TO Area (TOA) has yet to be defined and measured in 3Dand measured in 3D
• Objectives:Objectives:- DEFINE TOA in 3D- DEFINE TOA in 3D- VISUALIZE and QUANTIFY - VISUALIZE and QUANTIFY TOA change in 3 TOA change in 3 provocative maneuversprovocative maneuvers
(Dr. Kato of (Dr. Kato of Iwate Uni.)Iwate Uni.)
CostoclavicuCostoclavicular Spacelar Space
• Between first rib, Between first rib, clavicle(subclavius), clavicle(subclavius), first rib and scapulafirst rib and scapula
• Compression of Compression of subclavian artery, vein subclavian artery, vein and brachial plexusand brachial plexus
Pectoralis Pectoralis Minor SpaceMinor Space
InterscalenInterscalene Trianglee Triangle
Wright’s TestWright’s TestLoss of Pulse with Loss of Pulse with
Inspiration Inspiration
Military Brace or Military Brace or Eden TestEden Test
Drooping testDrooping test
Provocative maneuver for TOSProvocative maneuver for TOS
Thoracic Outlet Thoracic Outlet SyndromeSyndromeDrooping TestDrooping Test Eden TestEden Test
Wright TestWright Test
2D DEA of Carpal Contact Stress2D DEA of Carpal Contact Stress
Dr. Iwasaki, Hokaido Uni.Dr. Iwasaki, Hokaido Uni.
VIMS -VIMS - ModelModel The carpal skeletal complexThe carpal skeletal complex
Dr. Iwasaki & Dr. GendaDr. Iwasaki & Dr. Genda
3D Contact Area for DEA3D Contact Area for DEARadioulnar/Carpal; Carpal/MetacarpatRadioulnar/Carpal; Carpal/Metacarpat
RSRLTFC
Palmar
A. B.
C. D. 0
5
10
MPa
3D Contact 3D Contact Area/Stress of Distal Area/Stress of Distal
Radius & UlnaRadius & Ulna
IntactIntact STTSTT
SSCC
CCHH
Validation of Carpal Validation of Carpal Contact Area & Contact Area &
PressurePressure
Prof. Hara, Niigata U; Dr. Ide, Yamanashi UProf. Hara, Niigata U; Dr. Ide, Yamanashi U
Fracture reduction & Fracture reduction & planning usingplanning using VIMSVIMS
Dr. Kim of Korea, Dr. Kim of Korea, J. Lim J. Lim & R. Armiger& R. Armiger
Fracture reduction, joint Fracture reduction, joint contact & ligament contact & ligament stress under EFstress under EF
Glenohumeral & ScapulothoracicGlenohumeral & Scapulothoracic Motion RhythmMotion Rhythm
0
5
10
15
20
25
30
35
40
45
50
55
0 30 60 90 120 150
HUMERAL ELEVATION (degrees)
SC
AP
UL
AR
EL
EV
AT
ION
(d
eg
ree
s) CORONAL PLANE
SAGITTAL PLANE
Sagittal & Coronal Plane ElevationSagittal & Coronal Plane Elevation
M. Fung & Dr. KatoM. Fung & Dr. Kato
DEA DEA (Discrete Element Analysis)(Discrete Element Analysis)
• Rigid body Rigid body spring model spring model
• Spring deformity Spring deformity determines joint determines joint contact pressure contact pressure and ligaments and ligaments tensiontension
Concept Concept