摘要:
A maxillary protraction device (12) characterized with a chin-cup (1); one or more front hook-levers (2) on the front section of said chin-cup (1) to exert a force horizontally and forwards to the chin; at least two lateral linear hooks (5) located at the sides of the chin-cup (1) to exert an upwards force to the chin orthogonally; a stationary or movable anchorage unit (13) placed on the upper palate; a head-cap (11) to be placed on the head; front recesses (6) and lateral recesses (7) to be used for engaging the hooks (2 and 5) to the chin-cup (1), in the same number as that of hooks; and fixing members (9) in the same number as that of hooks.
摘要:
The present invention concerns a facial bow similar to those used to transmit to fixed or removable orthodontical appliances extra oral forces which act on the outer side of the dentition, and which comprise an outer bow (3) and an inner bow (4) linked to one another. It is essentially characterized in that the inner bow comprises a rounded area corresponding to the canine-incisal incisal area or presents a backward direction; a point of inflection which corresponds to the point of inflection of the inner arm towards the lingual area of the dental arches or towards the retro incisal lingual area; a lingual segment with an upward, backward and inward direction or just an upward and backward direction; an area to be totally or partially introduced in the tube inserted into the acrylic or directly into the acrylic; and a tube to be inserted into the acrylic.