Properties of titanium dental implants produced by electro-discharge compaction

Area of Science:

• Biomaterials Engineering
• Dental Implantology
• Materials Science

Background:

• Dental implants require high porosity for osseointegration.
• Maintaining mechanical integrity is crucial for implant function.
• Titanium (Ti) is a common material for dental implants due to its biocompatibility.

Purpose of the Study:

• To fabricate highly porous dental implants from titanium powders.
• To optimize fabrication parameters for maximum porosity and required mechanical properties.
• To assess the presence and distribution of internal voids in fabricated implants.

Main Methods:

• Cylindrical implants fabricated from commercial grade titanium REP-atomized powders using Electrical Discharge Compaction (EDC).
• Two-level full factorial experimental design varying sample weight, capacitance, input energy, and electrode configuration.
• X-ray analysis to detect internal macroscopic voids.
• Torque and compression tests to evaluate mechanical properties (yield/ultimate strengths).

Main Results:

• Successful fabrication of highly porous dental implants.
• Mechanical strengths ranged from 34-90 cm N (torque) and 205-502 MPa (compression).
• Demonstrated ability to produce void-free, porous structures.

Conclusions:

• Electrical Discharge Compaction (EDC) is a viable method for fabricating highly porous titanium dental implants.
• The study achieved a balance between high porosity for osseointegration and necessary mechanical strength.
• Fabricated implants were free of macroscopic internal voids, indicating successful process control.