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。

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By taking this cautious approach, a destabilizing "re-colonization" of the continent will be avoided.

CENTERFORSECURITYPOLICY: The red continent?

We need to reclaim the heyday of excellence in bold, scientific inquiry by re-identifying U.S. priorities in space exploration and space colonization and eventual commercialization.

FORBES: NASA, Got Space Exploration? Get Goals, Get Funding and Get Uhura.