| 摘要 |
A dental device is disclosed for dispensing a slurry-like dental compound, such as MTA, into a tooth cavity. The device comprises a delivery tool with a dispensing tip and a plastic tubing sleeve, for example, polyethylene, TEFLON(R), TYGON(R), or other inert tubing. The inner diameter of the sleeve is approximately the same as or slightly less than the outer diameter of the dispensing tip, thereby creating a tight seal between the sleeve and the dispensing tip, but still allowing the sleeve to slide along the dispensing tip when pressure is exerted. The outer diameter of the sleeve is chosen so that the sleeve rim forms a seal around the insertion point on the tooth. The sleeve length is long enough to allow a hydrated filling compound such as MTA to be loaded within the bore of the sleeve between the end of the sleeve and the displacing shaft, but short enough to withstand pressure applied to the dispensing tip to extrude the compound. Additionally, the plastic sleeve can be cut to a desired length or angle, which maximizes the flexibility of effective delivery of filling material in tight places, for example, at the root tip. The size of the dental device depends on its intended use, e.g., a smaller size for retrograde or micro-surgical fillings, e.g., root canals. The dispensing tip can be angled to facilitate dispensing the filling material in various places within the mouth. The dental device can also be adapted to attach to a vibration source, either mechanical, sonic, or ultrasonic, to aid in condensing the filling material by aiding the escape of air pockets. In an alternative embodiment, the sleeve has minute pores in the tubing and is pre-loaded with the dehydrated filling material. When the sleeve end of the dental device is placed in water, water enters the pores of the sleeve and hydrates the filling material.
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