Fulkerson M S, Czerw R J, Donnelly J C
U.S. Army Dental Activity, Ft. Hood, Texas 76544, USA.
J Endod. 1996 Jan;22(1):13-8. doi: 10.1016/S0099-2399(96)80229-9.
Forty-six extracted human teeth, 26 maxillary central incisors, and 20 mandibular incisors were instrumented with flared preparations. The maxillary and mandibular incisors were prepared to #50 and #30 master apical file sizes, respectively. Ten maxillary and mandibular teeth were obturated with a single gutta-percha (GP) cone and Super-EBA cement. Ten maxillary and mandibular incisors were obturated with laterally condensed GP and Roth 801 sealer. Six maxillary incisors were used as controls. Apical leakage of India ink was measured using a stereomicroscope after clearing the teeth. Results showed significantly less leakage in the mandibular incisors filled with GP and Super-EBA (p<0.05). There was no significant difference in leakage when comparing the maxillary central incisors (p>0.05). In this in vitro study, root canal obturation with a single GP cone and Super-EBA showed promise as an effective way to eliminate or reduce apical microleakage. Further studies are needed to test the ability to use this obturation method clinically.
46颗拔除的人牙，其中26颗上颌中切牙和20颗下颌切牙采用扩锥预备。上颌和下颌切牙分别预备至50号和30号主尖锉尺寸。10颗上颌和下颌牙齿用单根牙胶尖（GP）和Super-EBA水门汀进行充填。10颗上颌和下颌切牙采用侧向加压牙胶和Roth 801封闭剂进行充填。6颗上颌切牙作为对照。在清理牙齿后，使用体视显微镜测量印度墨水的根尖渗漏情况。结果显示，用牙胶尖和Super-EBA充填的下颌切牙渗漏明显较少（p<0.05）。比较上颌中切牙时，渗漏无显著差异（p>0.05）。在这项体外研究中，单根牙胶尖和Super-EBA进行根管充填显示出有望成为消除或减少根尖微渗漏的有效方法。需要进一步研究以测试这种充填方法在临床上的应用能力。
