Heyeraas K J, Myking A M
Scand J Dent Res. 1985 Jun;93(3):227-38. doi: 10.1111/j.1600-0722.1985.tb01950.x.
Pulpal blood flow (PBF) was measuring by H2-gas clearance in 35 replanted (incisors and premolars) and 22 contralateral control dog teeth. The PBF measurements were taken 6, 10, 16, 21 and 28 days after replantation. At 6, 10 and 16 days after replantation there was no measurable blood flow in the coronal pulp of either replanted incisors or premolars. 21 days after replantation a considerable reduction in PBF was measured in all replanted teeth. On average, PBF was reduced to about one fifth of PBF in the simultaneously measured contralateral controls. Four weeks after replantation, a more than threefold increase in PBF was measured in premolars with two roots, while PBF in premolars with one root and incisors was consistently reduced to an average of 40% of the controls. The vascular pattern of the teeth 4 wk after replantation was identified with perfusion of silicon rubber. The measurements suggest that replanted multirooted teeth revascularize more easily than single-rooted teeth, and that pulpal repair is restored by a gradual replacement and proliferation of new tissue.
采用氢气清除法对35颗再植牙（切牙和前磨牙）及22颗对侧对照犬牙的牙髓血流（PBF）进行测量。在再植后6、10、16、21和28天进行PBF测量。再植后6、10和16天，再植切牙或前磨牙的冠髓均未检测到血流。再植21天后，所有再植牙的PBF均显著降低。平均而言，再植牙的PBF降至同期测量的对侧对照牙的约五分之一。再植4周后，双根前磨牙的PBF增加了三倍多，而单根前磨牙和切牙的PBF持续降至对照牙平均值的40%。通过灌注硅橡胶确定再植4周后牙齿的血管模式。测量结果表明，再植的多根牙比单根牙更容易重新血管化，并且牙髓修复是通过新组织的逐渐替代和增殖来恢复的。
