Conclusion: Both gingivectomy and prolongation of dental crown could shorten the depths of the gingivalpocket. The clinical effect of the latter is better than that of the former.
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。
3
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.