Conclusion: Both gingivectomy and prolongation of dental crown could shorten the depths of the gingival pocket. The clinical effect of the latter is better than that of the former.
结论：牙龈切除术与牙冠延长术应用于牙体劈裂达龈下较深部位患牙均能明显改善龈袋深度，而后者的临床疗效优于前者。
The detection rates of gingival bleeding, dental calculus, periodontal pocket and periodontal attachment loss were 93.
牙龈出血、牙石、牙周袋、牙周附着丧失的检出率分别为93。
Results Two weeks after treatment, gingival index(GI) of nano silver tourmaline composite group was decreased significantly( P <0.01), but the periodontal pocket depth didn't have any change.
结果使用纳米银-托玛琳复合材料的受试者牙龈指数显著降低（P <0 .0 1 ） ，但对牙周袋的改善无效果。
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