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Comparative Study on Ti Surface Modified by Grit Blasting and Acid Etching for Dental Implants Ikhwan Hidayat  Supervisor:  Professor Sukyoung Kim Biomaterials Lab - Department of Materials Science & Engineering Yeungnam University , South Korea - 2009 Thesis Defense, December 7 th , 2009
Outline Objectives Background Introduction Methodology Materials Results & Discussions Conclusions
[object Object],[object Object],[object Object],Introduction Orthopedic screws/ fixation Dental Implants Skin/ cartilage Drug Delivery Devices Ocular  implants Heart valves Bone replacements Biosensors Implantable Microelectrodes
Introduction A  dental implant   is an artificial tooth  root  replacement and is used in prosthetic dentistry to support restorations that resemble a tooth or group of teeth The Romans, Chinese, and Aztec used gold in dentistry more than 2000 years ago.. The most widely accepted and successful dental implant today is the  osseointegrated implant , discovered by Professor Per-Ingvar Brånemark in the  1950s crown crown gum gum bone bone root implant tooth implant
Background The ability of material to attach with the living host tissue Surface roughness Chemical composition Surface morphology & Topography Surgical techniques Bone quality Implant  Design surface faster healing implants, cheaper way to manufacture implants Successful implant…
Objectives
Project Road Map Project Start Literature Study Polishing Grit Blasting Acid Etching In Vitro Cell Test Final Report Project End Project Crushing Sieving Granule Size:  100-150  μm , 150-200  μm , 200-250  μm , and 250-325  μm Output: EDS,Surface Profilometer, SEM  Output: EDS,Surface Profilometer, SEM, XRD Output: MTT assay ALP staining
Materials – Substrate ,[object Object],[object Object],Titanium is biocompatible (non-toxic and is not rejected by the body) and has the inherent property to osseointegrate enabling use in dental implants that can remain in place for over 30 years. a  Aluminum 6.00% vanadium 4.00% and other element 0.1% or 0.4% total. All are maximum allowable weight percent. Element Grade 1 Grade 2 Grade 3 Grade 4 Ti6Al4V  a Nitrogen 0.03 0.03 0.05 0.05 0.05 Carbon 0.10 0.10 0.10 0.10 0.08 Hydrogen 0.015 0.015 0.015 0.015 0.0125 Iron 0.20 0.30 0.30 0.50 0.25 Oxygen 0.18 0.25 0.35 0.40 0.13 Titanium balance
Grit Blasting ,[object Object],[object Object],[object Object],Bioactive, able to integrate in bone structures and support bone ingrowths, without breaking down or dissolving  combination of excellent corrosion resistance, good biocompatibility, high wear resistance and reasonable strength. ,[object Object],Ti
Acid Etching ,[object Object],[object Object],[object Object],[object Object],a colorless, viscous liquid mineral (inorganic) acid, used in medical especially in dentistry as an etching solution, to clean and roughen the surfaces of teeth a highly corrosive and toxic strong acid, used for the production of fertilizers, production of explosives, etching and dissolution of metals Ultrasonic  machine H 3 PO 4  / HNO 3 Blasted Ti disc
Characterization XRD EDS
Cell Test ,[object Object],[object Object],[object Object],Attached cells Samples MC3T3-E1 Cells Bulk  Material Surface Layer of Material Adsorbed layer of water, ions & proteins Cells in  biological  fluid
Results & Discussion >
Results & Discussion: Surface Chemistry ,[object Object],HA   Blasted HA Blasted + H 3 PO 4  Etched HA Blasted +  HNO 3  Etched Al 2 O 3  Blasted Al 2 O 3  Blasted +  H 3 PO 4  Etched Al 2 O 3  Blasted +  HNO 3  Etched ,[object Object],[object Object],50  μ m 50  μ m 50  μ m 50  μ m 50  μ m 50  μ m Samples Ca P Ti at% at% at% HA Blasted 9.12 7.09 83.79 HA Blasted + H 3 PO 4  Etched 0.49 0.82 98.69 HA Blasted + HNO 3  Etched 0.55 1.07 98.38 Samples O Al Ti at% at% at% Al 2 O 3  Blasted 50.82 9.74 39.45 Al 2 O 3  Blasted +  H 3 PO 4  Etched 50.80 14.10 35.10 Al 2 O 3  Blasted + HNO 3  Etched 48.31 11.05 40.64
Results & Discussion ,[object Object],[object Object],Surface Chemistry – XRD ,[object Object],[object Object]
Results & Discussion ,[object Object],[object Object],Surface Roughness – blasted samples
Results & Discussion ,[object Object],Surface Roughness – etched samples
Results & Discussion ,[object Object],Surface Morphology (b1) (b2) (a1) (a2) Figure IV.8 Surface Morphology of: (a1) HA granules, magnification 100x, (a2) Al 2 O 3  granules magnification 100x, (b1) HA grits, magnification 1000x, (b2) Al 2 O 3  grits magnification 1000x. ,[object Object]
Results & Discussion Surface Morphology SEM micrographs (a1) HA blasted; (a2) HA blasted & H 3 PO 4  etched; (a3) HA blasted & HNO 3  etched; (b1) Al 2 O 3  blasted; (b2) Al 2 O 3  blasted H 3 PO 4  etched and; (b3) Al 2 O 3  blasted HNO 3  etched (grit size 200-250  μm) magnification 1000x. The black arrows points the residual alumina particle (b1) (b2) (b3) (a1) (a2) (a3)
Results & Discussion Cell Proliferation – HA [i]   K. Anselme. Osteoblast adhesion on biomaterials Biomaterials 21 (2000), pp. 667–681 ,[object Object],[object Object]
Results & Discussion Cell Proliferation – Al 2 O 3 Piatelli et al  [i]  conclude that the osseointegration of titanium dental implant is not affected by residual aluminium oxide. [i]  A. Piatelli, M. Degidi, M. Paolantonio, C. Mangano and A. Scarano, Residual aluminium oxide on the surface of titanium implants has no effect on osseointegration.  Biomaterials 24 (2003), pp. 4081–4089. ,[object Object],[object Object]
Conclusions ,[object Object],[object Object],[object Object],[object Object]
Thank you… Send your comments or questions to: [email_address] Q&A  Session >

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Comparative Study on Ti Surface Modified by Grit Blasting and Acid Etching for Dental Implants

  • 1. Comparative Study on Ti Surface Modified by Grit Blasting and Acid Etching for Dental Implants Ikhwan Hidayat Supervisor: Professor Sukyoung Kim Biomaterials Lab - Department of Materials Science & Engineering Yeungnam University , South Korea - 2009 Thesis Defense, December 7 th , 2009
  • 2. Outline Objectives Background Introduction Methodology Materials Results & Discussions Conclusions
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  • 4. Introduction A dental implant is an artificial tooth root replacement and is used in prosthetic dentistry to support restorations that resemble a tooth or group of teeth The Romans, Chinese, and Aztec used gold in dentistry more than 2000 years ago.. The most widely accepted and successful dental implant today is the osseointegrated implant , discovered by Professor Per-Ingvar Brånemark in the 1950s crown crown gum gum bone bone root implant tooth implant
  • 5. Background The ability of material to attach with the living host tissue Surface roughness Chemical composition Surface morphology & Topography Surgical techniques Bone quality Implant Design surface faster healing implants, cheaper way to manufacture implants Successful implant…
  • 7. Project Road Map Project Start Literature Study Polishing Grit Blasting Acid Etching In Vitro Cell Test Final Report Project End Project Crushing Sieving Granule Size: 100-150 μm , 150-200 μm , 200-250 μm , and 250-325 μm Output: EDS,Surface Profilometer, SEM Output: EDS,Surface Profilometer, SEM, XRD Output: MTT assay ALP staining
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  • 19. Results & Discussion Surface Morphology SEM micrographs (a1) HA blasted; (a2) HA blasted & H 3 PO 4 etched; (a3) HA blasted & HNO 3 etched; (b1) Al 2 O 3 blasted; (b2) Al 2 O 3 blasted H 3 PO 4 etched and; (b3) Al 2 O 3 blasted HNO 3 etched (grit size 200-250 μm) magnification 1000x. The black arrows points the residual alumina particle (b1) (b2) (b3) (a1) (a2) (a3)
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  • 23. Thank you… Send your comments or questions to: [email_address] Q&A Session >

Editor's Notes

  1. that titanium can be successfully fused into bone when osteoblasts grow on and into the rough surface of the implanted titanium