Yusuf, M. .; Bahirrah, S.; Sembiring, B. The Effect Of Facial Vertical Dimension Changes On The Value Of Facial Harmony In Malocclusion Class II Skeletal In RSGM USU: Pengaruh Perubahan Dimensi Vertikal Wajah Terhadap Nilai Harmoni Wajah Pada Maloklusi Kelas II Skeletal Di RSGM FKG USU. Dentika Dental J. 2020, 23, 39-44.