| 摘要 |
A surgical instrument for the accurate osteotomy of the nasal hump (Destination Nasion Chisel System: DNCS). DNCS is a stainless metal instrument composed of the driver (1) the chisel (2) and the handle (3). The three components are mounted for the use and demounted for cleaning and sterilization. The driver (1), in spite of lack of visibility of the operating field, facilitates the surgeon to localize exactly the Nasion (N), which is the destination point of the osteotomy. The driver (1) has a mouth (1.1) for the insertion of the chisel (2). The antinasion (1.7) of its bar (1.2) sets on Nasion (N). On its slippery bearing (1.6) and between the wings (1.4) and also the trucks (1.5) moves the chisel (2). The driver also has a socket (1.3) for coupling with the handle (3). The chisel (2), being the cutting component of DNCS, has a distal narrow part (2.4) with a bevel (2.6) and a cutting edge (2.3). This part of the chisel fits the driver (1). The chisel (2) has also a proximal wide part (2.1) with two stops (2.2) and a pole (2.5). The handle (3) with its tongue (3.1) is coupled with the driver (1). Besides, the position of the handle (3) in the space is a guide for the equal in height osteotomy of the nasal bones. Finally, DNCS is an instrument with which the plastic surgeon solves the problem of lack of visibility of the operative field during the rhinoplasty, particularly during the osteotomy of the nasal hump, and is able to perform this, via DNCS, in the most precise way and without danger. |
