Effect of nonsurgical periodontal treatment in conjunction with either systemic administration of amoxicillin and metronidazole or additional photodynamic therapy on the concentration of matrix metalloproteinases 8 and 9 in gingival crevicular fluid in patients with aggressive periodontitis.

BMC Oral Health · 2015 · PMC4450832 · PMID 26007680

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did not reach statistical significanceno p-value reported

However, this change did not reach statistical significance.

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