Osseointegration at Implants Installed in Composite Bone: A Randomized Clinical Trial on Sinus Floor Elevation

Area of Science:

• Dentistry
• Oral Surgery
• Biomaterials Science

Background:

• Osseointegration of implants after sinus floor elevation can be influenced by residual graft material.
• Implant surface characteristics and access window coverage may impact osseointegration success.

Purpose of the Study:

• To evaluate the effect of collagen membrane coverage on the access window and implant surface characteristics on osseointegration after sinus floor elevation.

Main Methods:

• Sinus floor elevation was performed using bovine bone graft material.
• Access windows were covered with a collagen membrane (Mb group) or left uncovered (No-Mb group).
• Mini-implants with moderate rough or turned surfaces were installed and retrieved after 3 months for histological analysis.

Main Results:

• No statistically significant difference in osseointegration was found between the collagen membrane and no-membrane groups.
• Statistically significant differences in osseointegration were observed between implant surface types.
• Implants with moderately rough surfaces showed significantly higher osseointegration than turned surfaces.

Conclusions:

• Implant surface topography is a critical factor for osseointegration in composite bone after sinus floor elevation.
• The use of a collagen membrane to cover the access window did not demonstrate a significant effect on osseointegration in this study.