Conclusion the fracture strength of premolar teeth filled with light curing composite resin was higher than filled with amalgam after root canal therapy.

结论根管治疗后用光固化树脂充填前磨牙的各类洞，牙体的抗折强度优于用银汞充填者。

youdao

Root canal perforation; Visible light-curing; Calcium hydroxide.

根管穿孔；光固化；氢氧化钙。

youdao

The Marines were just over a mile from the main canal that surrounds Marjah, and they continued to get very light resistance from outlying Taliban fighters.

WSJ: Ahead of Marjah Offensive, Afghan Officials Sought to Negotiate With Taliban