Preparation of hydroxyapatite-granule- implanted titanium alloy composites with a cylindrical shape

Area of Science:

• Biomaterials Engineering
• Materials Science
• Orthopedic Implants

Background:

• Titanium alloys are widely used for dental implants due to their biocompatibility.
• Uniform hydroxyapatite (HA) coating enhances osseointegration of titanium implants.
• Current methods struggle with uniform HA granule implantation on complex curved surfaces.

Purpose of the Study:

• To develop a novel superplastic forming system for uniform hydroxyapatite (HA) granule implantation.
• To achieve uniform HA granule distribution on curved titanium alloy surfaces, mimicking dental roots.
• To create novel HA-granule-implanted titanium alloy composites.

Main Methods:

• Development of a specialized superplastic forming system utilizing wedges.
• Fixation of polyvinyl alcohol (PVA) films with HA granules onto a die's curved inner surface.
• Superplastic forming of cylindrical titanium alloy samples under specific conditions (1023 K, 1 h, 1960 N in vacuo).

Main Results:

• The developed system achieved uniform scattering and adhesion of HA granules on the die's curved surface.
• The superplastic forming technique successfully expanded the titanium alloy sample radially.
• Uniform implantation of HA granules into the entire curved surface of the titanium alloy was demonstrated.
• HA-granule-implanted titanium alloy composites were successfully fabricated.

Conclusions:

• The novel superplastic forming system effectively addresses the challenge of uniform HA granule implantation on curved titanium alloy surfaces.
• This technique offers a promising method for creating advanced biomaterials for dental and orthopedic applications.
• The resulting HA-granule-implanted titanium alloy composites show potential for improved implant performance.