| 青春期大鼠下颌功能性前伸后翼外肌的超微结构改变 |
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| 引用本文： | 周冬青,白玉兴,车晓霞,孙异临.青春期大鼠下颌功能性前伸后翼外肌的超微结构改变[J].北京口腔医学,2011,19(1):8-11. |
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| 作者姓名： | 周冬青 白玉兴 车晓霞 孙异临 |
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| 作者单位： | 周冬青,白玉兴,车晓霞,ZHOU Dong-qing,BAI Yu-xing,CHE Xiao-xia(首都医科大学口腔医学院正畸科,北京,100050);孙异临,SUN Yi-lin(首都医科大学附属北京天坛医院电镜室,北京,100050) |
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| 基金项目： | 国家自然科学基金，北京市自然科学基金 |
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| 摘 要： | 目的观察青春期大鼠下颌功能性前伸后翼外肌的超微结构变化。方法青春期雄性Sprague-Dawley大鼠40只,随机分为4个实验组和4个对照组,每组5只。实验组配戴固定的前伸下颌矫治器。对照组不配戴矫治器。分别于下颌前伸3 d、7 d、14 d、28 d处死实验组和对照组大鼠。取大鼠左右侧翼外肌,制作电镜标本,透射电镜下观察翼外肌的超微结构变化。结果下颌前伸3天时,实验组大鼠翼外肌肌细胞内部分肌丝溶解;下颌前伸7 d和14 d时,肌丝方向紊乱,肌小节宽度不规则。下颌前伸3 d、7 d和14 d时,翼外肌肌细胞内肌丝间及肌膜下线粒体增多、形态改变。下颌前伸7 d和28 d时,翼外肌肌细胞内肌浆网多见。下颌前伸28 d时,翼外肌肌细胞内肌丝方向基本一致。结论青春期大鼠下颌功能性前伸后翼外肌的超微结构发生改建。
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| 关 键 词： | 翼外肌 下颌前伸 透射电镜 |
Ultrastructural characteristics of lateral pterygoid muscle after functional mandibular protrusion in adolescent rats |
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| ZHOU Dong-qing,BAI Yu-xing,CHE Xiao-xia,SUN Yi-lin.Ultrastructural characteristics of lateral pterygoid muscle after functional mandibular protrusion in adolescent rats[J].Beijing Journal Of Stomatology,2011,19(1):8-11. |
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| Authors: | ZHOU Dong-qing BAI Yu-xing CHE Xiao-xia SUN Yi-lin |
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| Affiliation: | ZHOU Dong-qing,BAI Yu-xing,CHE Xiao-xia,SUN Yi-lin.Department of Orthodontics,Capital Medical University School of Stomatology,Beijing 100050,China |
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| Abstract: | Objective To investigate the ultrastructural characteristics of lateral pterygoid muscle after functional mandibular protrusion in adolescent rats.Methods Forty adolescent male Sprague-Dawley rats were divided into four experimental groups and four control groups.The experimental groups were fitted with fixed bite-jumping devices that protruded the mandible.The control groups did not wear the devices.The animals were sacrificed on 3,7,14,28 days after experimental mandibular protrusion.The lateral pterygoid... |
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| Keywords: | Lateral pterygoid muscle Mandibular protrusion Transmission electron microscope |
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