| 摘要 |
In an appliance for use in filling an endodontically prepared root canal of the kind comprising a) a central insertion rod (2) of flexible material, surrounded partly by b) an elongate filler body (3) of plastic or thermoplastic material, the new feature is represented by c) a core (4) surrounding the rod (2) and surrounded by the filler body (3) and consisting of material that is or may be made sufficiently soft to allow removal of the rod (2) without removal of the filler body (3). One advantageous effect of this arrangement is that anchoring holes for a tooth crown may be drilled without risk of encountering a broken-off part of an insertion rod that would previously have been left to remain permanently in the filler body (3). |
