Poly(hydroxybutyrate-co-hydroxyvalerate)-sol-gel bioactive glass promotes periodontal tissue regeneration

doi:10.3969/j.issn.2095-4344.2016.12.008

Abstract

Abstract:

BACKGROUND: Our previous studies have shown that the poly(hydroxybutyrate- co-hydroxyvalerate) - sol-gel bioactive glass (PHBV-SGBG) has good biocompatibility and promote bone tissue repair, but its specific role in periodontal tissue regeneration has not been investigated.
OBJECTIVE: To investigate the periodontal regenerative effects of a PHBV-SGBG scaffold in beagle dogs.
METHODS: Alveolar bone defects (5 mm×5 mm) were surgically created bilaterally at the buccal side of the mandibular third and fourth premolars of four beagle dogs. PHBV-SGBG scaffold was randomly filled in the defects as experimental group and nothing was put into the contralateral as control group. Histological and scanning electron microscopy observations, cone-beam CT evaluation and the Ca/P concentration ratio analysis were processed at 2, 4, 8 and 12 weeks after surgery.
RESULTS AND CONCLUSION: After surgery, the height of the regenerated tissue increased with time in both groups, and the regenerated tissue height in the experiment group was higher than that in the control group (P < 0.05). At 12 weeks after surgery, the Ca/P concentration ratio of the experiment group was close to that in the normal tissue (P > 0.05), but higher than that of the control group (P < 0.05); the histological observation showed that the regenerated tissue of the experimental group was close to the normal tissue, and the regenerated tissue of the control group tended to be mature, with a small amount of new blood vessels. Under the scanning electron microscope, no scaffold structure was visible in the experimental group with the presence of bone lacuna at 8 weeks after surgery, while in the control group, there was no bone lacuna and obvious osteoblasts; at 12 weeks after surgery, the structure of the regenerated tissue of experimental group was more regular and close to the normal tissue with no remarkable osteoblasts, and in the control group, the regenerated tissue was disordered, with several cavity. These results show that the PHBV-SGBG scaffold can enhance periodontal bone regeneration effectively.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Sun Wen-juan, Xu Yi-chuan, Huang Nan-nan, Tang Qian, Chen Cui-ting. Poly(hydroxybutyrate-co-hydroxyvalerate)-sol-gel bioactive glass promotes periodontal tissue regeneration[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(12): 1725-1731.

Figures/Tables 5

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