Set of three-dimensional markers characterized by: a) upper element which has a projection in an upper front area, that develops into a depression, which has two opposing lateral inner sides where each of which has a slot formed by two ridges; b) intermediate element and lower element, each one having two lateral projections on an upper rear area; c) both intermediate element and upper element, have two lateral slots on a lower rear area where the lateral projections fit through sliding, to fix upper element, intermediate element and lower element to a single piece. d) a first marker which has a two-part symmetrical geometry, each part formed by a first projection to be positioned outside the buccal surface of the teeth with one slot on a lateral inner side, the first projection developing into a depression where teeth will be standing and by a second projection which also has one slot on a lateral inner side, the second projection representing a rear area to be aligned into the lingual surfaces of the teeth; and e) spacer, being designed to restore the shape integrity of a dental arch, which spacer has a groove across one side, for enabling the fixation to soft tissues or to auxiliary placement components and has three top grooves on the opposite side, said top grooves having a narrower area on an outside of the spacer in comparison with the one on an inside part of spacer. f) a third element which has a top fit geometrically identical to and fitable to top grooves and said third element also has two lateral projections and two bottom projections fitable into a first element; g) first element which has a top slot which forms two engagements fitable to the projections of the third element, said first element also has two projections at the bottom fitable to the second element; h) second element has a top slot which forms two engagements fitable to projections of the first element; i) second marker which has one projection to be placed outside the buccal surfaces of teeth with one slot on a lateral inner side and developing into a depression where teeth will fit, and a second projection having one slot on a lateral inner side, the second projection being a rear part to be aligned inside of the lingual surfaces of the teeth. a) upper element which has a projection in an upper front area, that develops into a depression, which has two opposing lateral inner sides where each of which has a slot formed by two ridges; b) intermediate element and lower element, each one having two lateral projections on an upper rear area; c) both intermediate element and upper element, have two lateral slots on a lower rear area where the lateral projections fit through sliding, to fix upper element, intermediate element and lower element to a single piece. d) a first marker which has a two-part symmetrical geometry, each part formed by a first projection to be positioned outside the buccal surface of the teeth with one slot on a lateral inner side, the first projection developing into a depression where teeth will be standing and by a second projection which also has one slot on a lateral inner side, the second projection representing a rear area to be aligned into the lingual surfaces of the teeth; and e) spacer, being designed to restore the shape integrity of a dental arch, which spacer has a groove across one side, for enabling the fixation to soft tissues or to auxiliary placement components and has three top grooves on the opposite side, said top grooves having a narrower area on an outside of the spacer in comparison with the one on an inside part of spacer. f) a third element which has a top fit geometrically identical to and fitable to top grooves and said third element also has two lateral projections and two bottom projections fitable into a first element; g) first element which has a top slot which forms two engagements fitable to the projections of the third element, said first element also has two projections at the bottom fitable to the second element; h) second element has a top slot which forms two engagements fitable to projections of the first element; i) second marker which has one projection to be placed outside the buccal surfaces of teeth with one slot on a lateral inner side and developing into a depression where teeth will fit, and a second projection having one slot on a lateral inner side, the second projection being a rear part to be aligned inside of the lingual surfaces of the teeth.