Biomaterial
Sumary Presentation
Sumary Presentation
Function of Artificial Disc Implants
An intervertebral disc is situated between two vertebras in the spine.
With age or excessive loading, degeneration of the discs can occur, leading to pain and immobility
Material component of an Artificail Disc implant
Metal on Metal
Metal on Polymer
Possible risk and problems with artificial disc implants?
Heterotopic ossification -> leading to a fixation between the two vertebras affecting the range of movement (Before surgery 15°, after 5 years of surgery 3.3°)
Advantages of Artificial Disc Implants?
the patient maintains normal motion
the patient can return earlier to normal day activities
Defintion of Arthroplasty?
Arthroplasty is a surgery procedure, in which a jont is replaced by an artificial device in the human body.
components of a Hip Implant?
Acetabular Shell
femoral Stem and Neck
Femoral Head
Acetabular Liner
Material of a Hip Implant:
- Shell
- Stem and Neck
- Head
- Liner
Shell: Metal / Ceramic (Alumina, Zirconia)
Stem and Neck: Metal (Ti-alloys, Co-Cr-Mo alloys, Stainless steel)
Head: Metal/ Ceramic
Liner: Polymer (PMMA, UHMWPE)
Fixation of a Hip Implant?
Shell and Stem!
Shell: help of external coating using friction, cement or screws for more fixation
Stem: can be fixed with bone cement or cement free
Possible complication while using Hip Implants?
- Joint dislocation
- loosening of stem, cup or screw
- Stem failure
- Femoral neck fracture
- degeneration due to corrosion
What are Retina Implant used for?
Retinal implant can be used for patients who loose eyesight due to degeneration of the rods and cones cell layer in the retina
Which are the two Design for Retinal Implants?
- Epi Retinal Implant
- Sub- Retinal Implant
What Material is used in Retinal Implants?
- Silicon (for the Electrode array)
- Gold/ Gold Wires (Coating of electrode array)
- Polyamide (carrier foil)
- ceramics (coil housing)
Possible Risk and Problems by Retina Implant?
- Fixation of implant
- reliable surgical procedure
- Diffusion of chemical elemnts in eye
- production errors
- Electrode degratdation / corrosion
Name the tow different types of Heart Valves
- Mechanical Heart valves
- Tissue / Biological Heart valves
Properties of the material used for heart valves:
- Very durable (hight strength, be resistant towards corrosion, fatigue and wear)
- Hemocompatible
- Biocompatible
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Flashcards
Function of Artificial Disc Implants
An intervertebral disc is situated between two vertebras in the spine.
With age or excessive loading, degeneration of the discs can occur, leading to pain and immobility
Material component of an Artificail Disc implant
Metal on Metal
Metal on Polymer
Possible risk and problems with artificial disc implants?
Heterotopic ossification -> leading to a fixation between the two vertebras affecting the range of movement (Before surgery 15°, after 5 years of surgery 3.3°)
Advantages of Artificial Disc Implants?
the patient maintains normal motion
the patient can return earlier to normal day activities
Defintion of Arthroplasty?
Arthroplasty is a surgery procedure, in which a jont is replaced by an artificial device in the human body.
components of a Hip Implant?
Acetabular Shell
femoral Stem and Neck
Femoral Head
Acetabular Liner
Material of a Hip Implant:
- Shell
- Stem and Neck
- Head
- Liner
Shell: Metal / Ceramic (Alumina, Zirconia)
Stem and Neck: Metal (Ti-alloys, Co-Cr-Mo alloys, Stainless steel)
Head: Metal/ Ceramic
Liner: Polymer (PMMA, UHMWPE)
Fixation of a Hip Implant?
Shell and Stem!
Shell: help of external coating using friction, cement or screws for more fixation
Stem: can be fixed with bone cement or cement free
Possible complication while using Hip Implants?
- Joint dislocation
- loosening of stem, cup or screw
- Stem failure
- Femoral neck fracture
- degeneration due to corrosion
What are Retina Implant used for?
Retinal implant can be used for patients who loose eyesight due to degeneration of the rods and cones cell layer in the retina
Which are the two Design for Retinal Implants?
- Epi Retinal Implant
- Sub- Retinal Implant
What Material is used in Retinal Implants?
- Silicon (for the Electrode array)
- Gold/ Gold Wires (Coating of electrode array)
- Polyamide (carrier foil)
- ceramics (coil housing)
Possible Risk and Problems by Retina Implant?
- Fixation of implant
- reliable surgical procedure
- Diffusion of chemical elemnts in eye
- production errors
- Electrode degratdation / corrosion
Name the tow different types of Heart Valves
- Mechanical Heart valves
- Tissue / Biological Heart valves
Properties of the material used for heart valves:
- Very durable (hight strength, be resistant towards corrosion, fatigue and wear)
- Hemocompatible
- Biocompatible
