An oral care composition for treating or preventing calculus comprising an anticalculus agent and an antibacterial agent comprising a biphenol compound obtainable from Magnolia officinalis, wherein the composition is free of phosphate-containing anticalculus agents.一種用於治療或預防牙石之口腔保健組成物,其包含抗牙石劑和得自厚樸之聯苯酚化合物的抗菌劑,其中該組成物不含有含磷酸鹽抗牙石劑。