拔牙窝放置明胶海绵对骨愈合的影响.doc

文档介绍：拔牙窝放置明胶海绵对骨愈合的影响
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作者:徐普,毛小泉,黄谢山,李晓敏,杨玄,洪瑞娥
【摘要】目的:研究动物实验种植手术前的牙槽嵴准备方法,了解明胶海绵在动物实验中对拔牙窝愈合的影响。方法:取beagle犬5只,体重11~15kg。涡轮机辅助拔除双侧下颌第四前磨牙(PM4)。采用自身对照,实验侧牙槽窝放置明胶海绵,对照侧牙槽窝单纯压迫止血。术后观察牙槽窝愈合情况,并在术前,手术当天,6周及12周时拍摄下颌PM4的X线根尖片,观察骨密度与纹理。结果:涡轮机辅助拔除beagle犬下颌PM4,手术过程顺利,拔除牙根完整,无残根滞留,牙槽骨无明显损伤。实验侧创口大约1min内止血,对照侧大约需压迫5~10min,方见血凝块形成将创口封闭。拔牙后6周,双侧X线片显示拔牙窝与周围正常牙槽骨界限基本消失,骨密度增高,骨纹理出现。12周时,骨密度与周围正常牙槽骨基本一致,骨纹理排列较整齐。结论:涡轮机辅助利于beagle犬下颌PM4的拔除;明胶海绵可以保护拔牙窝,有一定局部止血作用,有利于拔牙窝的早期愈合,对拔牙窝牙槽骨愈合没有影响。
【关键词】拔牙;明胶海绵;牙槽骨;愈合
[ABSTRACT] Objective: To explore preoperative alveolar preparation method in animal models and to investigate the gelatin sponge implant for alveolar healing after teeth removal. Methods: Bilateral mandibular 4th premolars (PM4) in 5 beagle dogs (1115 kg) were removed with the help of the turbine. One alveolar was filled with gelatin sponge while the other was simply dealt with hemostasis. Selfparison of the alveolar healing process was done. Xray of each PM4 root was filmed to observe its bone density and texture before the surgery, the day of extraction, 6 weeks and 12 weeks after the surgery. Results: PM4 removal plete and essful in all dogs, with no residue or injury left. Bleeding was stopped within 1 minute after sponge implant, while this process took 510 min for the corresponding side. Six weeks after surgery, the Xray films showed inc