The result has shows that it is equal in the index number of soft dental calculus between smoker and non-smoker.It is not clear about the difference of the number of gingivitis areas between them.

• 结果表明吸烟者软垢指数与不吸烟者相同,龈炎区段数两者差异无显著性,吸烟者牙周炎区段数高于不吸烟者。