. "ComparsionBetween All Zicronia, All PEEK and Zirconia-Peek Telescopic Attachments for Two Implants Retained Mandibular Complete Overdentures. In-Vitro Stress Analysis Study". Mansoura Journal of Dentistry, 6, 1, 2019, 58-62. doi: 10.21608/mjd.2019.199089