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“DIFFERENCE OF pH AND CALCIUM LEVEL OF SALIVARYIN CARIES AND CARIES FREE STUDENTS OF FAKULTAS KEDOKTERAN GIGI UNIVERSITAS SUMATERA UTARA: PERBEDAAN VOLUME, pH DAN KADAR KALSIUM SALIVA KARIES DAN BEBAS KARIES PADA MAHASISWA FAKULTAS KEDOKTERAN GIGI UNIVERSITAS SUMATERA UTARA”, Dentika Dental J., vol. 19, no. 2, pp. 128–132, Dec. 2016, doi: 10.32734/dentika.v19i2.415.