Effect of absorbable membranes on sandwich bone augmentation

Area of Science:

• Dental Implantology
• Periodontology
• Regenerative Medicine

Background:

• Implant dehiscence defects pose challenges for successful osseointegration.
• Sandwich bone augmentation (SBA) is a technique used to treat these defects.
• The role of barrier membranes in SBA outcomes requires further elucidation.

Purpose of the Study:

• To evaluate the efficacy of barrier membranes in sandwich bone augmentation for implant dehiscence defects.
• To compare outcomes between different types of barrier membranes and a no-membrane control group.
• To assess the impact of membranes on bone regeneration and defect closure.

Main Methods:

• Twenty-six implant-associated buccal dehiscence defects were treated using the SBA technique with mineralized allografts.
• Defects were randomized into three groups: bovine collagen membrane (BME), acellular dermal matrix (ADM), and no membrane (control).
• Measurements of defect height, width, and horizontal depth were taken at baseline and 6 months post-treatment.

Main Results:

• All implants achieved successful osseointegration.
• No significant difference in defect height reduction was observed among the groups.
• Horizontal bone gain was significantly greater in the membrane groups (ADM and BME) compared to the control group (P=0.044).

Conclusions:

• The sandwich bone augmentation technique provides predictable clinical results for implant dehiscence defects.
• The use of absorbable barrier membranes, such as ADM and BME, enhances horizontal bone gain compared to non-membrane treatment.
• Membrane application in SBA appears to improve bone augmentation in terms of thickness.