Mara Gustina Vocation school of Dental Technician, Faculty of Dentistry, Institut Ilmu Kesehatan Bhakti Wiyata Kediri
Dentistry Master Program, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta Indonesia
Widjijono Widjijono Department of Biomaterial, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta Indonesia
Endang Wahyuningtyas
* Corresponding Author Department of Prosthodontics, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta Indonesia