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 (1115 kg) were removed with the help of the turbine. One alveolar was filled with gelatin sponge while the other was simply dealt with hemostasis. Selfparison of the alveolar healing process was done. Xray 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 510 min for the corresponding side. Six weeks after surgery, the Xray films showed inc