Effects of local delivery of bFGF from PLGA microspheres on osseointegration around implants in diabetic rats
Related Experiment Video
Updated: May 19, 2026
Surgical Bone Implantation Technique for Rat Tibia Models of Diabetes and Osteoporosis
Published on: July 5, 2024
Gui-Ke Zou1, Ying-Liang Song, Wei Zhou
1Department of Oral Implantology, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China.
Objective:
Diabetes mellitus may impair bone healing after dental implant placement. The objective of this study was to evaluate the effects of the local delivery of basic fibroblast growth factor (bFGF) from poly(lactide-co-glycolide) (PLGA) microspheres on osseointegration around titanium implants in diabetic rats.
Study Design:
The bFGF-PLGA microspheres were prepared by the W/O/W double-emulsion solvent evaporation method. A total of 20 rats were used to create diabetic animal models by giving them a high-fat and high-sugar diet and a low-dose streptozotocin intraperitoneal injection. Titanium implants were planted into the tibias of the diabetic rats and into 10 normal rats. Microspheres were loaded on the surfaces of the implants in the bFGF intervention group before they were placed into the rats. After 4 or 8 weeks, the tibias containing the implants were removed and embedded with resin. Uncalcified tissue slices were prepared to compare osseointegration.
Results:
At 4 weeks, the bone-implant contact rate in the diabetic control group was less than that in the control group and the bFGF intervention group (P < .05). At 8 weeks, the results among the 3 groups were similar to those at 4 weeks.
Conclusions:
The local delivery of bFGF from PLGA microspheres into areas around titanium implants may improve osseointegration in diabetic rats.
