摘要
目的:应用MicroCT对Sprague-Dawley(SD)雌性大鼠去除双侧卵巢三个月后的下颌骨和胫骨进行对比研究。方法:分别从假手术对照(Sham)组和卵巢切除骨质疏松(OVX)组各取大鼠8只。将全部大鼠深度麻醉后处死。取一侧下颌骨和胫骨,去净软组织。行MicroCT检查、骨组织病理学研究。所得数据经SPSS13.0统计分析。结果:大鼠去除双侧卵巢3月后,经MicroCT检查发现,OVX组大鼠胫骨:骨小梁数目减少,排列稀疏,骨小梁断裂;骨小梁面积比和体积比、厚度和数目,骨矿含量和骨体积密度等均较Sham组显著降低,骨小梁分离度增加,P<0.05。OVX组大鼠下颌骨:骨组织体积比、骨小梁厚度和单位体积骨小梁数目,均比Sham组升高,骨小梁分离度较Sham组降低,P<0.05。与胫骨改变比较,结果完全相反。另外,大鼠下颌骨的三维骨矿含量和骨体积密度也升高,P<0.05。骨组织切片病理学观察:Sham组胫骨松质骨呈条索状,骨小梁相互连接成网;下颌骨松质骨较致密,呈板状。OVX组胫骨骨小梁变细,分离度增大,新生骨基质减少。磨牙下方松质骨骨髓腔增大,牙槽突新生骨基质减少。结论:SD雌性大鼠切除卵巢3月后,下颌骨与胫骨的骨改变有差异。OVX大鼠胫骨近心干骺端呈明显骨质疏松状态,与Sham组比较差异显著,MicroCT影像直观、三维指标差异显著。OVX大鼠下颌骨,与Sham组比较,骨量增加,结构致密,但已有骨生成减少表现。
Objective: To compare the performance in mandible with that in tibia of the OVX rats after ovariectomized three months.Methods: Sixteen rats from OVX group and sham group were anesthetized,then sacrificed.After microCT scanning,histopathological observation were made.The data were statistically analyzed by SPSS13.0.Results: After rats ovariectomized three months,trabecular bone volume,trabecular thickness,trabecular number,BMC and BMD of OVX group all were elevated than those of Sham group(P <0.05).Trabe...
出处
《中华老年口腔医学杂志》
2010年第6期324-328,共5页
Chinese Journal of Geriatric Dentistry
基金
国家自然科学基金(编号:30772450)
北京市自然科学基金(编号:7082086)
关键词
骨质疏松
动物模型
骨组织计量学
显微断层扫描
osteoporosis
animal model
bone histomorphometry
micro computerized tomography
