IMMEDIATE-FUNCTIONAL LOADING CONCEPT WITH ONE-PIECE IMPLANTS (BECES/BECES N/KOS/BOI) IN THE MANDIBLE AND MAXILLA- A MULTI-CENTER RETROSPECTIVE CLINICAL STUDY Journal title: Journal of Evolution of Medical and Dental Sciences Authors: Dobrinin Oleg, Lazarov Alexander, Konstantinovic Vitomir S, Sipic Olga, Siljanovski Damir, Milicic B... Subject(s):