北京大学学报（医学版）2018，Vol.50Issue(1)：42-48,7.DOI:10.3969/j.issn.1671-167X.2018.01.007
纳米生物活性玻璃促进兔颅骨临界骨缺损修复
Nano-sized bioactive glass enhances osteogenesis of critical bone defect in rabbits
摘要
Abstract
Objective: To compare the osteogenic effects of a nano-sized 58S bioactive glass (nano-58S BG) and a traditional 45S5 bioactive glass (45S5 BG) in penetrating parietal critical bone defects. Methods: Critical bone defect with 9 mm diameter was created in the parietal bone of New Zealand rabbits. The bone defects were then filled with either nano-58S BG, or 45S5 BG, or nothing but the newly-formed blood clot as the blank control at random. For histological observation,specimens were gained 4 and 8 weeks after the surgery, sectioned and stained by HE. The amount of collagen type I was observed with Picric-Sirius Red staining through polarimetry. To observe the new bone formation with fluorescence under the laser confocal microscope, we injected fluorescent markers 14,28,and 42 days after the surgery. The markers were tetracycline hydrochloride, alizarin red and calcin individually in chronological order. Image J software was used to quantify the bone regeneration. Results: HE staining showed that BG particulates were integrated with the surrounding tissue without any inflammatory cells infiltration 4 weeks after surgery. New bone regeneration was observed both from the border and in the center of the defects in both BG groups. No bone regeneration in defect center was observed in control group. At the end of 8 weeks, there was more bone regeneration in nano-58S group compared with 45S5 group and control group. The structure of the new bone in BG groups was hollow,which was similar to the natural normal parietal bone. No hollow structure was observed in the new bone of control group. Picric-sirius Red polarimetry showed that more amount of collagen type Ⅰ was found in nano-58S group than in either 45S5 or control group. The fluorescent observation of the hard tissue slices at the end of 8 weeks showed statistically larger scope and faster new bone formation in nano-58S group with (29. 4 ±4. 48) μm thickness from 4-6 weeks and (35. 3 ±3.74) μm from 6-8 weeks compared with 45S5 group [(13.43 ±3.44) μm and (17.64 ±4.13) μm] and control group [(5.88 ±2.92) μm and (6.07 ±3.02) μm, P < 0. 01]. Conclusion: Compared with the traditional 45S5 bioactive glass, 58S nano-sized bioactive glass showed better osteogenic effect in bone regeneration in parietal bones of rabbits.关键词
生物活性材料/生物活性玻璃/骨再生/组织工程Key words
Bioactive material/Bioactive glass/Bone regeneration/Tissue engineering分类
医药卫生引用本文复制引用
宫玮玉,刘绍清,董艳梅,高学军,陈晓峰..纳米生物活性玻璃促进兔颅骨临界骨缺损修复[J].北京大学学报（医学版）,2018,50(1):42-48,7.基金项目
国家自然科学基金(51372005)和北京大学口腔医院青年科研基金项目(PKUSS20140101)资助 （51372005）
Supported by the National Natural Science Foundation of China (51372005) and the Youth Foundation of Peking University School and Hospital of Stomatology (PKUSS20140101) （51372005）
