Salah AF Hegazy. "COMPARATIVE STUDY OF RETENTION AND PERI-IMPLANT OUTCOME OF FOUR IMPLANTS USED TO RETAIN MANDIBULAR SINGLE OVERDENTURE PLACED IN LINEAR VERSUS QUADRILATERAL DISTRIBUTION". Egyptian Dental Journal, 62, Issue 1 - January (Part 3), 2016, 623-634. doi: 10.21608/edj.2016.95077