Dickson S S, Peters D D
Department of Endodontics, University of Texas Health Science Center, San Antonio.
J Endod. 1993 Aug;19(8):398-403. doi: 10.1016/S0099-2399(06)81504-9.
Two sets of 30 roots were obturated either with lateral condensation or a halothane dip technique. Fifteen roots from each group were immersed in India ink with vacuum and 15 without vacuum. Each root was coated with nail polish and wax, leaving only its apical end open for ink penetration. The roots were cleared and three linear measurements were made: distance of ink penetration coronal to the gutta-percha apical tip; distance from the gutta-percha tip to major foramen; and distance from the major foramen to anatomical apex. The average length of ink penetration coronal to the apical extension of the gutta-percha for the lateral condensation groups combined was 1.33 mm and for the halothane groups combined was 2.15 mm. There was no significant difference between vacuumed and not vacuumed for degree of ink penetration. The gutta-percha of the halothane-dipped groups advanced significantly closer to the foramen than the lateral condensation groups (0.38 mm versus 0.65 mm).
两组各30根牙根分别采用侧向加压充填法或氟烷浸渍技术进行根管充填。每组15根牙根在有真空的情况下浸入印度墨水中，另外15根在无真空的情况下浸入。每根牙根都涂上指甲油和蜡，只留根尖开口以便墨水渗入。牙根经过清理后进行三项线性测量：墨水渗入到牙胶尖冠方的距离；从牙胶尖到主要根尖孔的距离；以及从主要根尖孔到解剖根尖的距离。侧向加压充填组联合起来，墨水渗入到牙胶尖冠方延伸处的平均长度为1.33毫米，氟烷组联合起来为2.15毫米。在墨水渗入程度方面，有真空和无真空之间没有显著差异。氟烷浸渍组的牙胶比侧向加压充填组更靠近根尖孔（分别为0.38毫米和0.65毫米）。
