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A preclinical study comparing single- and double-root 3D-printed Ti-6Al-4V implants.

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Area of Science:

  • Biomaterials Science
  • Dental Implantology
  • 3D Printing Technology

Background:

  • 3D-printed dental implants are emerging, with double-root designs being a recent focus.
  • Investigating the biomechanical and histological performance of novel implant designs is crucial for clinical success.

Purpose of the Study:

  • To compare the damping capacity, micro-CT, and histological outcomes of 3D-printed double-root implants versus single-root implants.
  • To evaluate bone integration and stability of novel double-root implant designs in a canine model.

Main Methods:

  • Fabrication of single- and double-root 3D-printed implants.
  • Implant placement in beagle dog premolars, followed by 12 weeks of observation.
  • Assessment of damping capacity, periapical radiography, micro-CT (BV/TV, BMD), and histological analysis (BIC, BAFO).

Main Results:

  • No significant differences in overall implant stability between single- and double-root implants, except at 4 and 12 weeks.
  • Micro-CT analysis revealed comparable bone volume/tissue volume (BV/TV) and bone mineral density (BMD) for both implant types.
  • Histomorphometric analysis showed significantly lower bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) for double-root implants.

Conclusions:

  • 3D-printed double-root implants offer comparable stability and bone remodeling to single-root implants.
  • Lower BIC and BAFO values in double-root implants suggest potential challenges with bone integration, particularly in the furcation area.
  • Further research is needed to address bone loss in the furcation area for double-root implant designs.