HEALING FOLLOWING IMPLANTATION OF PERIODONTITIS AFFECTED ROOTS INTO BONE TISSUE
HEALING FOLLOWING IMPLANTATION OF PERIODONTITIS AFFECTED ROOTS INTO BONE TISSUE
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DOI：
10.1111/j.1600-051x.1980.tb01952.x
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发表时间：
1980-01-01
影响因子：
6.7
通讯作者：
LINDHE, J
中科院分区：
文献类型：
--
作者：
KARRING, T;NYMAN, S;LINDHE, J
研究了一项实验，以确定暴露于口腔环境并随后植入骨组织的根表面是否会发生新的结缔组织附着。对3只比格犬的12颗牙齿进行牙周破坏，将棉花牙线结扎在牙齿颈部，使牙周破坏达到牙根长度的一半。在冠切除和根半切开术后，对牙根进行补牙，并对牙根进行彻底的修剪和种植。每根根被提取并植入颌骨有牙区准备的骨腔中，以便上皮细胞迁移到伤口中，防止愈合过程中的细菌感染。动物的根种植和牺牲计划为1、2和3个月的观察期。暴露于口腔环境的根表面没有出现新的结缔组织附着，但愈合以修复现象为主，即根吸收和强直。在拔牙后保留牙周韧带组织的牙根区域，重新形成功能导向的附着体。除了接合上皮的顶端迁移和龈下菌斑的再生外，这种类型的细胞重新填充伤口区域可能危及新的结缔组织附着。
An experiment was studied to determine whether new connective tissue attachment can occur to root surfaces which have been exposed to the oral environment and subsequently implanted into bone tissue. Twelve teeth in 3 beagle dogs were subjected to progressive periodontal breakdown to half the root length by placing cotton floss ligatures around the neck of the teeth. Following crown resection and root hemisection, the teeth were root filled and the roots thoroughly scaled and planted. Each root was extracted and implanted into bone cavities prepared in edentolous areas of the jaws so that epithelial migration into the wound and bacterial infection were prevented during healing. Root implantation and sacrifice of the animals were scheduled to allow for observation periods of 1, 2 and 3 mo. New connective tissue attachment did not occur to root surfaces which had been exposed to the oral environment, but healing was characterized by repair phenomena, i.e., mainly root resorption and ankylosis. In those areas of the roots where periodontal ligament tissue was preserved following tooth extraction, a functionally oriented attachment apparatus was re-formed. In addition to apical migration of junctional epithelium and regrowth of subgingival plaque, the type of cells which repopulate the wound area may jeopardize new connective tissue attachment.