Kvinnsland I, Heyeraas K J
Department of Cariology and Endodontics, School of Dentistry, University of Bergen, Norway.
Acta Odontol Scand. 1989 Feb;47(1):41-52. doi: 10.3109/00016358909004799.
The reestablishment and rate of osteodentin and dentin matrix formation in 27 apicoectomized replanted and 20 control incisors in cats were studied after Procion H8-BS vital staining. In control teeth the pattern of matrix formation differed in the various pulpal zones, with a higher rate of matrix formed toward apical areas, most dominantly in maxillary incisors. Osteodentin formation could be traced after a lag period of more than 10 days after replantation. Thirty and 60 days postoperatively osteodentin matrix was found in the total pulpal length in 83% and 73% of the teeth, respectively. A common finding was a tubular osteodentin matrix in the pulpal apical third in the replanted teeth. Tubular osteodentin matrix was, however, present most incisally in some teeth 60 days postoperatively. Internal resorption corresponding to outer cervical lesions dominated the pulpal reactions in the maxillary replanted teeth after 60 days. It is concluded that under the present experimental conditions the pulp tissue possesses a high healing potential and that the osteodentin formation reflects the pulpal healing pattern after replantation traumas. The results also indicate that successful pulpal healing depends on unexposed dentinal tubules.
在对猫的27颗根尖切除再植切牙和20颗对照切牙进行普施安H8-BS活体染色后，研究了骨样牙本质和牙本质基质形成的重建情况及速率。在对照牙中，不同牙髓区域的基质形成模式有所不同，向根尖区域形成的基质速率更高，在上颌切牙中最为明显。再植后经过超过10天的延迟期后可追踪到骨样牙本质的形成。术后30天和60天，分别在83%和73%的牙齿的整个牙髓长度中发现了骨样牙本质基质。一个常见的发现是再植牙牙髓根尖三分之一处有管状骨样牙本质基质。然而，术后60天时，在一些牙齿中，管状骨样牙本质基质最靠近切端。60天后，上颌再植牙的牙髓反应以上颌颈部病变对应的内部吸收为主。得出的结论是，在当前实验条件下，牙髓组织具有很高的愈合潜力，骨样牙本质的形成反映了再植创伤后牙髓的愈合模式。结果还表明，成功的牙髓愈合取决于未暴露的牙本质小管。
