hips stem design-- ashish sharma
DESCRIPTION
Designing Of Hip Stem By Using Pro ETRANSCRIPT
DESIGNING OF HIP STEM BY USING PRO E 5.0
By:
Ashish Sharma
BRIEF VIEW OF CONTENTS
• Introduction Of Total Hip Replacement(THR)• Model Of Hip Stem• Sketch Of Stem For Designing The stem • Femoral Stem Model• Femoral Neck• Femoral Head• Acetabular cup• Advantages• Refrences
TOTAL HIP REPLACEMENT
Total hip replacement, also called total hip arthroplasty, involves removing the diseased bone and cartilage and replacing it with orthopedic implants. In an arthritic hip, the damaged ball is replaced by a metal ball attached to a metal stem fitted into the femur and a plastic socket is implanted into the pelvis, replacing the damaged socket. It is done for disorders like osteoarthritis, rheumatoid arthritis, traumatic arthritis, Avascular necrosis and other reasons as malignant bone.
Sketch Of Stem For Designing The stem
• Sketch of Stem & Head
Femoral Stem Model
• This femoral stem has:
1) Neck
2) Ridges
3) Flat shaft
It will be well fitted into the femoral cavity
PRO E LAYOUT OF STEM
FILLETS & MIRROR
• Rounding Mirroring Chamfering
Ridges & Grooves
•DEEP GROOVES•SMALL GROOVES
• DEEP GROOVES : Provides reliable stability to the stem
• SMALL GROOVES : It creates a bigger surface for an optimal mechanical fixation with the cement
TAPERED DISTAL TAIL
• The Tapered distal stem is designed to wedge into the femoral medullary canal
• Tapering lessens the bending moment
• It transfers axial and bending forces
STEM HEAD
• It includes :• 1) NECK• 2) BALL
HEAD NECK BALL
ACETABULAR CUP
GROOVES IN ACETABULAR CUP
• It enhances the cement fixation in the acetabular cavity
• It resists rotation of the cup in the cement mantle after implantation
ASSEMBLY
Enhanced realism view exploded view Unexploded view
DIMENSIONS:STEM BALL
DIMENSIONS OF ACETABULAR CUP
MATERIALS
• CoCrMo (cobalt chromium molybedunum) for cemented stem
• CoCrMo for head
• PolyEthylene(PE) for cup
REFRENCES
• http://www.ejbjs.org• http://
villoy.com/Villoy%20Implants%20V-350%20Hip%20Stem.html
• http://www.montagne-bj.com/cup.asp• http://www.endotec.com/Hip-System.htm• www.wikipedia.com• www.kettering.edu• http://www.ehealthmd.com/library• www.kneeandhip.co.uk/images/hip/arthritis/hip
THANK YOU