| 摘要 |
Orthodontic expander comprising a left frame (Tl) and a right frame (T2), wherein said left frame (Tl) and right frame (T2) respectively comprise a left body (1) and a right body (2) provided with means for their anchorage to the teeth of a dental arch, wherein said bodies (1.2) have through holes (10) oriented in an expansion direction (d), wherein said frames (Tl, T2) are slidingly mounted along said expansion direction (d) by means of guides (4) inserted in said holes (10) of said bodies (1.2), wherein the distance (h) between the said bodies (1, 2) is adjusted by means of a screw (5) screwed into the body (2) of one of said frames, wherein said screw (5) has an operating head (51) positioned between said bodies (1.2), and wherein elastic means (M) are positioned and acting between said frames (Tl, T2) and can be activated or reactivated by acting on said screw (5) which compresses them to activate or reactivate them when desired. The elastic means (M) comprise a plurality of elastic plates (6) with a curvilinear profile (P) oriented transversely with respect to said expansion direction (d). |
