| 摘要 |
<p>A drainage tube (1) for drainage of sinus maxillaris consists of a middle portion (1b) having an exterior dimension adapted to a hole made in the bone wall between nasal cavity and sinus maxillaris, an extendible end portion preferably outwardly foldable legs (6) and an opposite end portion (2) widened compared with the middle portion (1b), prefarably a collar. For making the hole in the bone wall is developed a tube-formed drill, which in its free end edge is formed with a toothed cutter, and for the insertion of the drainage tube in position between nasal cavity and sinus maxillaris is developed a particularly insertion instrument.</p> |
