³í¹®) The Impact of Masticatory Function on Cognitive Impairment in Older Patients: A Population-Based Matched Case-Control Study ¿¬¼¼´ëÇб³Ä¡°ú´ëÇÐ Ä¡ÁÖ°úÇб³½Ç Â÷Àç±¹‧¹ÚÁø¿µ‧°í°æ¾Æ ±³¼ö ¿¬±¸ÆÀ