Deproteinized bovine bone remodeling pattern in alveolar socket: a clinical immunohistological evaluation

Area of Science:

• Biomaterials Science
• Oral and Maxillofacial Surgery
• Regenerative Medicine

Background:

• Deproteinized bovine bone (DBB) exhibits low resorption rates in vivo and in vitro.
• Understanding DBB's impact on human bone remodeling is crucial for its clinical application.

Purpose of the Study:

• To investigate deproteinized bovine bone (DBB) remodeling patterns in human extraction sockets using immunohistochemistry.
• To analyze the expression of key bone remodeling markers following DBB grafting.

Main Methods:

• Socket preservation technique used as an in vitro model for bone remodeling analysis.
• 20 patients randomized into DBB grafted (test) and spontaneous healing (control) groups.
• Immunohistochemical analysis of BMP-2, BMP-7, ALP, IL-6, and TNF-α expression in bone biopsies at 5 months post-extraction.

Main Results:

• DBB group showed higher TNF-α expression compared to controls.
• Bone morphogenetic proteins (BMP-2, BMP-7) were more expressed in the control group.
• Significant time-dependent changes observed for BMP-2, BMP-7, IL-6, ALP, and TNF-α, with significant group-time interactions for BMP-2, BMP-7, and TNF-α.

Conclusions:

• Deproteinized bovine bone (DBB) supports active bone remodeling in human extraction sockets at 5 months.
• DBB application leads to increased expression of both anabolic and catabolic bone markers.
• The findings suggest DBB facilitates a dynamic bone healing environment.