Abstract
Introduction
Diabetes mellitus, as a major health problem for the elderly has been shown to alter the properties of the bone and impair bone healing around a titanium implant in both humans and animals. The aim of this study was to examine the effect of adipose-derived stem cells on the healing process around a titanium implant in streptozotocin-induced diabetic rats.
Materials and Methods
Thirteen rats were divided into two groups: adipose-derived stem cells injected group and a control group. A titanium screw implant (diameter: 2.0 mm, length: 3.5 mm) was placed into both tibia of 13 rats: 13 right tibia as the control group and 13 left tibia as the experimental group. The rats were sacrificed at different intervals (1, 2, and 4 weeks) after implantation for histopathology observations and immuno-histochemistric analysis.
Results
The histopathological findings revealed earlier new formed bone in the experimental group than the control group. In particular, at 1 week after implantation, the experimental group showed more newly formed bone and collagen around the implant than the control group. In immunohisto-chemistric analysis, osteoprotegerin (OPG) expression in the experimental group increased early compared to that of the control group until 2 weeks after implantation. However, after 2 weeks, OPG expression in the experimental group was similar to OPG expression in the control group. The receptor activator of nuclear factor κ B ligand (RANKL) expression in the experimental group increased early compared to that of the control group, and then decreased at 2 weeks. After 2 weeks, the level of RANKL expression was similar in both groups.
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![]() | Fig. 5.Microphotograph at 1 week after implantation in control rat.(H&E staining, original magnification ×100) |
![]() | Fig. 6.Microphotograph at 2 weeks after implantation in control rat.(H&E staining, original magnification ×100) |
![]() | Fig. 7.Microphotograph at 4 weeks after implantation in control rat.(H&E staining, original magnification ×100) |
![]() | Fig. 8.Microphotograph at 1 week after implantation in experimental rat.(H&E staining, original magnification ×100) |
![]() | Fig. 9.Microphotograph at 2 weeks after implantation in experimental rat.(H&E staining, original magnification ×100) |
![]() | Fig. 10.Microphotograph at 4 weeks after implantation in experimental rat.(H&E staining, original magnification ×100) |
![]() | Fig. 11.Microphotograph at 1 week after implantation in control rat. (Masson's trichrome stain. Original magnification ×100) |
![]() | Fig. 12.Microphotograph at 2 weeks after implantation in control rat. (Masson's trichrome stain. Original magnification ×100) |
![]() | Fig. 13.Microphotograph at 4 weeks after implantation in control rat. (Masson's trichrome stain. Original magnification ×100) |
![]() | Fig. 14.Microphotograph at 1 week after implantation in experimental rat. (Masson's trichrome stain. Original magnification ×100) |
![]() | Fig. 15.Microphotograph at 2 weeks after implantation in experimental rat. (Masson's trichrome stain. Original magnification ×100) |
![]() | Fig. 16.Microphotograph at 4 weeks after implantation in experimental rat. (Masson's trichrome stain. Original magnification ×100) |
![]() | Fig. 17.Osteoproteogrin antibody reaction of regenerating bone at 1 week after implantation on tibia of the control rat. ×200. |
![]() | Fig. 18.Osteoproteogrin antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the control rat. ×200. |
![]() | Fig. 19.Osteoproteogrin antibody reaction of regenerating bone at 1 week after implantation on tibia of the Experimental rat. ×200. |
![]() | Fig. 20.Osteoproteogrin antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the Experimental rat. ×200. |
![]() | Fig. 21.Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 1 weeks after implantation on tibia of the Control rat. ×200. |
![]() | Fig. 22.Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the Control rat. ×200. |
![]() | Fig. 23.Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 1 weeks after implantation on tibia of the Experimental rat. ×200. |
![]() | Fig. 24.Receptor activator of nuclear factor kB ligand antibody reaction of regenerating bone at 2 weeks after implantation on tibia of the Experimental rat. ×200. |