Hinge system configured to move a door , shutter or similar element from a closed configuration to an open configuration, and vice versa, comprising: a plurality of coupling elements comprising at least - a first coupling element operatively attachable to a fixed frame of said door ; - and at least one second coupling element operatively attachable to a portion of said door ; a connecting body placed side by side to and operatively connected to both said first coupling element and said second coupling element , wherein said hinge system comprises at least a first pin extending along a first axis (X) of said connecting body and configured to provide a pivotal connection about said first axis (X) between said first coupling element and said connecting body and a second pin extending along a second axis (Y) configured to provide a pivotal connection about said second axis (Y) between said second coupling element and said connecting body , said first axis (X) and said second axis (Y) being staggered so as to be arranged at respective different distances (D1, D2) from a closing plane (F) defined by said door and said fixed frame in a closed configuration of said door , wherein said closed configuration of the door is a flush configuration with the closing plane (F) of the door aligned with the fixed frame , said hinge system being characterized in that it comprises a protrusion positioned on said at least first coupling element proximal to said first pin and next to an area facing the outside and/or facing and in line with said closing plane (F), and configured to cover at least partially a passage opening between said door and said fixed frame in a closed configuration of said door . a plurality of coupling elements comprising at least - a first coupling element operatively attachable to a fixed frame of said door ; - and at least one second coupling element operatively attachable to a portion of said door ; - a first coupling element operatively attachable to a fixed frame of said door ; - and at least one second coupling element operatively attachable to a portion of said door ; a connecting body placed side by side to and operatively connected to both said first coupling element and said second coupling element , wherein said hinge system comprises at least a first pin extending along a first axis (X) of said connecting body and configured to provide a pivotal connection about said first axis (X) between said first coupling element and said connecting body and a second pin extending along a second axis (Y) configured to provide a pivotal connection about said second axis (Y) between said second coupling element and said connecting body , said first axis (X) and said second axis (Y) being staggered so as to be arranged at respective different distances (D1, D2) from a closing plane (F) defined by said door and said fixed frame in a closed configuration of said door , wherein said closed configuration of the door is a flush configuration with the closing plane (F) of the door aligned with the fixed frame , said hinge system being characterized in that it comprises a protrusion positioned on said at least first coupling element proximal to said first pin and next to an area facing the outside and/or facing and in line with said closing plane (F), and configured to cover at least partially a passage opening between said door and said fixed frame in a closed configuration of said door . <EOS>