Saunders W P, Saunders E M
Glasgow Dental Hospital and School, UK.
Int Endod J. 1990 Jan;23(1):28-33. doi: 10.1111/j.1365-2591.1990.tb00799.x.
The leakage associated with restorative materials placed within the pulp chamber of maxillary and mandibular molars was studied in vitro. The root canals and pulp chambers of 69 extracted teeth were prepared chemomechanically and sealed with gutta-percha and Tubliseal using cold lateral condensation. The teeth were divided into five groups. Gutta-percha was removed from the pulp chambers of three of the groups of 15 teeth and filled with one of three materials, a glass ionomer cement, a cermet cement or an amalgam. The gutta-percha was removed from the pulp chamber in the fourth group of nine teeth, which were left unfilled. The gutta-percha in the pulp chambers of the fifth group of teeth was left intact. The teeth were suspended in Indian ink, thermocycled for 24 hours and stored for a further 48 hours at 37 degrees C. They were then demineralized and cleared and the degree of coronal leakage was assessed. Those teeth with no filling in the pulp chamber showed extensive leakage. The gutta-percha-filled group demonstrated greater leakage than did the groups in which other restorative materials had been employed (P less than 0.01). No significant differences in leakage occurred between the other groups (P less than 0.05). It is recommended that the pulp chamber of molars should be restored with a filling material following root canal treatment.
对上颌和下颌磨牙髓腔内放置的修复材料相关渗漏进行了体外研究。对69颗拔除牙齿的根管和髓腔进行化学机械预备，并用牙胶和Tubliseal采用冷侧方加压法进行充填。将牙齿分为五组。在15颗牙齿的三组中，将牙胶从髓腔中取出，并用三种材料之一进行充填，即玻璃离子水门汀、金属陶瓷水门汀或汞合金。在第四组9颗牙齿中，将牙胶从髓腔中取出，不进行充填。第五组牙齿髓腔内的牙胶保持完整。将牙齿悬浮于印度墨水中，进行24小时热循环，并在37℃下再保存48小时。然后进行脱矿和透明处理，并评估冠部渗漏程度。髓腔未充填的牙齿显示出广泛的渗漏。与使用其他修复材料的组相比，牙胶充填组的渗漏更严重（P<0.01）。其他组之间的渗漏无显著差异（P<0.05）。建议在根管治疗后用充填材料修复磨牙的髓腔。
