软组织状况均明显好转，牙周袋深度减小，探诊出血百分比降低，具有统计学差异；
The condition of perio-implant soft and hard tissues improved. PD (probing depth) and BOP% (bleeding on probing %) decreased with statistical differences.
结论慢性牙周炎患者在接受牙周基础治疗后，虽然牙周探诊深度变浅，但牙周微生物可能已在较短时间内发生再定植。
Conclusion Although periodontal pockets decrease in depth, re-colonization of periodontal bacteria may occur soon after mechanical debridement in patients with chronic periodontitis.
结论采用牙周病理模型进行探诊基本训练有助于学生掌握牙周探诊技术，提高探诊准确性，从而为进入临床实习打好扎实基础。
Conclusion Practice of periodontal probing on periodontal pathological model was helpful to enhance the precision of the measurements of probing depth and the level of periodontal probing technique.
结果四种牙膏均可使QH菌斑指数、出血指数和阿米巴感染度下降（P<0.05），而探诊深度、附着水平和牙松动度无统计学差异（P>0.05）。
Results The four toothpastes reduced the QH, SBI and AID(P<0.05), but there was no significant difference between in AL, PD and OD(P>0.05)among the groups.
结果四种牙膏均可使QH菌斑指数、出血指数和阿米巴感染度下降（P<0.05），而探诊深度、附着水平和牙松动度无统计学差异（P>0.05）。
Results The four toothpastes reduced the QH, SBI and AID(P<0.05), but there was no significant difference between in AL, PD and OD(P>0.05)among the groups.
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