What's New

	A New Post Removal System -- Continued: The PRS consists of an extracting plier, a domer bur, five trephines of varying diameters, five tubular taps; a torque bar; and a selection of rubber bumpers of varying, diameters. The first tool to be used is the domer drill to round off the coronal most aspect of the post. Next, we have to select the largest trephine that will engage the post (figure 6a & 6b) and drill down over the head of the post 2 to 3 mm. This step will create a perfectly round post.

	Figure 6a	First you start by selecting the largest trephine that will properly engage the post.
	Figure 6b	Once the correct size is found, the selected trephine will be drilled down 2-3 mm over the head. Thus creating a perfectly round post.

	The trephine used dictates the tubular tap needed. If we used a #3 trephine, then we will need to use a #3 tubular tap (figure 7). The selected tap is turned counter clockwise and threaded into the head of the milled post. A protective rubber bumper should be used at all times in order to prevent tooth and/or root fracture.
	Once the tubular tap has tightly engaged the post it is time to use the post removal pliers (figure 8). The rubber cushion will protect the tooth from the forces of the plier.	Figure 8
	When the plier is properly positioned, the screw knob is turned in order for the jaws of the pliers to open. As the jaws open the post will be lifted from within the root canal system (figure 9a & 9b).
	This figure shows the tubular tap with the removed post in place.	Figure 9a
	A view of the tooth with the successful removal of the post.	Figure 9b

	Figure 10	The post-op radiograph shows the success of the post removal with the retreatment completed.

We have been using this system for the last few months with great success.  

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