In vivo low-density bone apposition on different implant surface materials

Area of Science:

• Biomaterials Science
• Dental Implantology
• Bone Regeneration

Background:

• Osseointegration involves new bone formation on or near dental implants.
• Contact osteogenesis and distance osteogenesis are distinct bone apposition processes.
• Implant surface characteristics significantly influence osseointegration outcomes.

Purpose of the Study:

• To evaluate calcium and phosphorus apposition on different dental implant surfaces.
• To compare contact and distance osteogenesis on modified and unmodified implant materials.
• To investigate the effect of carbon monoxide ion implantation on Ti6Al4V dental implants.

Main Methods:

• Analysis of beagle mandibles with three implant types (CO ion-implanted Ti6Al4V, sand-blasted/acid-etched CP-Ti, untreated Ti6Al4V).
• Healing periods of 3 and 6 months post-implantation.
• Energy dispersive spectroscopy (EDS) used to identify and differentiate bone formation sources.

Main Results:

• Low-density bone, indicative of new bone formation, was observed only at the apical bone region.
• No low-density bone was found on the surface of untreated Ti6Al4V implants.
• Distance osteogenesis was exclusively observed on CO ion-implanted samples at 3 months, suggesting enhanced bone apposition.

Conclusions:

• Surface modification, specifically CO ion implantation, can promote distance osteogenesis in dental implants.
• Nano-topography and surface chemistry alterations induced by CO ion implantation are key factors.
• This finding has implications for improving dental implant osseointegration and stability.