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Title: Investigation of Bone Growth in Additive-Manufactured Pedicle Screw Implant by Using Ti-6Al-4V and Bioactive Glass Powder Composite

Journal Article · · International Journal of Molecular Sciences (Online)
DOI:https://doi.org/10.3390/ijms21207438· OSTI ID:1817109
 [1];  [2];  [3]; ORCiD logo [3];  [4];  [3];  [3];  [3]; ORCiD logo [3]; ORCiD logo [5];  [3];  [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [3]
  1. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering; Can Tho Univ., Can Tho City (Vietnam). College of Education. Dept. of Physics
  2. Taipei Medical Univ., Taipei (Taiwan). College of Medicine. International Ph.D. Program in Medicine; Pham Ngoc Thach Medical Univ., Ho Chi Minh City (Vietnam). College of Medicine. Dept. of Trauma-Orthopaedics
  3. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering
  4. Industrial Technology Research Inst., Hsinchu (Taiwan). Laser and Additive Manufacturing Technology Center
  5. National Taiwan Univ. of Science and Technology, Taipei (Taiwan). Dept. of Materials Science and Engineering
  6. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  7. Industrial Technology Research Inst., Hsinchu (Taiwan)
  8. Taipei Medical Univ. (Taiwan). College of Medicine. School of Medicine. Dept. of Orthopaedics; Taipei Medical Univ. Hospital, Taipei (Taiwan). Dept. of Orthopedics

In this study, we optimized the geometry and composition of additive-manufactured pedicle screws. Metal powders of titanium-aluminum-vanadium (Ti-6Al-4V) were mixed with reactive glass-ceramic biomaterials of bioactive glass (BG) powders. To optimize the geometry of pedicle screws, we applied a novel numerical approach to proposing the optimal shape of the healing chamber to promote biological healing. We examined the geometry and composition effects of pedicle screw implants on the interfacial autologous bone attachment and bone graft incorporation through in vivo studies. The addition of an optimal amount of BG to Ti-6Al-4V leads to a lower elastic modulus of the ceramic-metal composite material, effectively reducing the stress-shielding effects. Pedicle screw implants with optimal shape design and made of the composite material of Ti-6Al-4V doped with BG fabricated through additive manufacturing exhibit greater osseointegration and a more rapid bone volume fraction during the fracture healing process 120 days after implantation, per in vivo studies.

Sponsoring Organization:
USDOE Office of Science (SC); Ministry of Science and Technology (MOST)
Grant/Contract Number:
AC05-00OR22725; MOST 109-2634-F-009-029; MOST-108-2739-M-213-001
OSTI ID:
1817109
Journal Information:
International Journal of Molecular Sciences (Online), Vol. 21, Issue 20; ISSN 1422-0067
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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