Tissue Eng Regen Med.  2016 Feb;13(1):70-77. 10.1007/s13770-016-9021-0.

Histomorphometric Evaluation of Onlay Freeze-Dried Block Bone and Deproteinized Bovine Bone with Collagen in Rat

• Jung GU
• Hong SJ
• Hong JY
• Pang EK

• KMID: 2360869
• DOI: http://doi.org/10.1007/s13770-016-9021-0

Abstract

The aim of this study was to evaluate the effect of human freeze-dried bone block (FDBB) and deproteinized bovine bone with collagen (DBBC) on bone formation when applied as an onlay graft in rat calvariums. Thirty male Sprague-Dawley rats received collagen sponge (control), FDBB, or DBBC onlay grafts trimmed into 8-mm disks measuring 4-mm height. Each graft was secured onto the calvarium surface using horizontal mattress sutures. Rats in each group were killed at 2 (n=5) or 8 (n=5) weeks postoperatively for histologic and histomorphometric analysis. The total augmented area (mm²), new bone area (mm²), and bone density (%) were measured. The FDBB and DBBC groups showed significantly more new bone formation and bone density than the control group at 2 and 8 weeks. The increased new bone area was significantly greater in the FDBB group than in the DBBC group (p<0.05). The total augmented area was significantly higher in the FDBB and DBBC groups at 2 and 8 weeks than in the control group (p<0.05), and at 8 weeks, the area was significantly decreased in the DBBC group compared to that in the FDBB group and the area at 2 weeks (p<0.05). Within the limitations of the present study, we concluded that onlay FDBB and DBBC grafts caused new bone formation through an osteoconductive mechanism. In addition, compared to FDBB, DBBC had less capacity to form new bone and maintain the space.

Keyword

Human freeze dried corticocancellous bone block; Deproteinized bovine bone with collagen; Onlay graft; Bone formation; Space maintenance

MeSH Terms

Animals
Bone Density
Collagen*
Humans
Inlays*
Male
Osteogenesis
Porifera
Rats*
Rats, Sprague-Dawley
Skull
Space Maintenance, Orthodontic
Sutures
Transplants
Collagen