华西口腔医学杂志

• 专栏论著 • 上一篇    下一篇

聚DL-乳酸作为羊腭部软组织缺损修复引导膜的超微结构改变

罗恩1;胡静1;宁秋1;余兰2;周勇3;魏世成4   

  1. 1.四川大学华西口腔医学院 口腔颌面外科教研室,四川 成都 610041; 2.首都医科大学附属安贞医院 口腔科,北京 100029;3.什邡市马井医院 外科,四川 什邡 618400; 4.北京大学口腔医院 口腔颌面外科,北京 100081
  • 收稿日期:2006-02-25 修回日期:2006-02-25 出版日期:2006-02-20 发布日期:2006-02-20
  • 通讯作者: 魏世成,Tel:13552224289
  • 作者简介:罗 恩(1977-),男,四川人,博士研究生
  • 基金资助:

    国家高技术研究发展计划(863)资助项目(7150020140)

Ultrastructure of Poly-DL-lactic Acid as GTR Membrane of Soft Tissue Defects in Goats Palates

LUO En1, HU Jing1, NING Qiu1, YU Lan2, ZHOU Yong3, WEI Shi-cheng4   

  1. 1. Dept. of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu 610041, China;2. Dept. of Stomatology, Anzhen Hospital, Capital Medical University, Beijing 100029, China; 3. Majing Hospital of Shifang City, Shifang 618400, China; 4. Dept. of Oral and Maxillofacial Surgery, School of Stomatology, Peking University, Beijing 100081, China
  • Received:2006-02-25 Revised:2006-02-25 Online:2006-02-20 Published:2006-02-20

摘要:

目的  观察聚DL-乳酸膜植入引导羊腭部软组织缺损修复过程中材料微观结构的变化。方法  建立8只羊硬腭部洞穿性缺损实验动物模型,植入聚DL-乳酸膜引导修复腭部软组织缺损,通过扫描电镜观察术前及术后1、2、4、6个月该膜的超微结构变化。结果  植入前,聚DL-乳酸膜表面呈有规律的网状结构;术后1个月 ,聚DL-乳酸膜表面结构仍较规则,网状结构边缘变得圆钝;术后2个月,聚DL-乳酸膜表面网状结构粗糙而不规则;术后4个月,聚DL-乳酸膜表面网状结构破坏;术后6个月,聚DL-乳酸材料成为松散的不定形堆积物。结论  聚DL-乳酸膜在腭部组织愈合过程中起到良好的支撑作用,当组织愈合后,该材料开始丧失其力学强度,并逐渐被机体完全吸收。

关键词: 聚DL-乳酸, 组织引导膜, 降解, 超微结构

Abstract:

Objective  To study the ultrastructure changes of PDLLA as GTR membrane of soft tissue defects in the palates of goats. Methods  To establish penetrating rectangle palate defects in 8 goats. PDLLA membranes were implanted into the defect areas to guide the regeneration of the soft tissue defects. In 1, 2, 4, 6 months after the operation, the membranes were observed with scanning electron microscope. Results  The surface of PDLLA membrane was regular network before implantation. 1 month after the implantation, the edge of network became blunt. 2 months after the implantation, the surface of PDLLA membrane became coarse and irregular. 4 months after the implantation, PDLLA membrane network collapsed. 6 months after the implantation, PDLLA degraded into scraggly accumulation. Conclusion  PDLLA membrane supplies good supporting function during concrescence of the soft tissue defects. PDLLA gradually loses mechanic intensity and is absorbed.

Key words: poly-DL-lacticacid, GTRmembrane, degradation, ultrastructure