Coltene ParaPost, Инструкция по эксплуатации

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Para Post
®
X System
Instructions For Use
9
ParaPostXP, ParaPost
Casting Technique - Indirect
Note: Posts are single use devices and should never be salvaged
for re-use. Structural integrity of the post could be compromised
including microscopic damage which could lead to post fracture.
For illustrations see page 100 - 102
We urge the use of Hygenic
®
Rubber dam with these
procedures.
1. After endodontic therapy has been completed, prepare tooth
for restoration as if pulp were intact. The preparation should
include at least 1.5 mm of sound tooth structure all around
the circumference of the preparation, apical to the core,
for desired ferrule effect
(Fig. 20) .* If that amount of tooth
structure is not available, it should be created by periodontal
crown lengthening and/or orthodontic extrusion.*
2. Use a radiograph to determine the appropriate diameter and
depth of post space preparation. Keep in mind that sufficient
root wall thickness must be maintained (1 mm minimum)*
to prevent perforation or weakening of root walls, and at
least 4-5 mm of guttapercha must be left intact to protect
the apical seal.
3. Remove gutta-percha to preplanned depth with a Gates-Glid-
den drill, Peeso reamer and/or hot instrument. Radiographic
verification is recommended. If the canal has been obturated
with a silver cone, remove it and reseal with Hygenic Gut-
ta-Percha before preparing the post space.
4. To begin paralleling the post space, select the ParaPost Drill
which corresponds to the last Gates-Glidden drill used in Step
3
(Fig. 20) . (See “Approximate Diameter Comparisons” chart,
Fig. A). To help maintain the preplanned depth of the post
space, ParaPost Drills have been premarked to identify depths
of 7, 9 and 11 mm from the apical end of the drill.
ParaPost Drills can be used either manually with the Universal
Hand Driver or with a slow-speed contraangle (750 - 1,000
RPM) . When a contra-angle is used, the drill must be kept
in continuous clockwise rotation until it has been completely
removed from the tooth. This will minimize the possibility of
the drill seizing in the post space. Remove all weakened or
unsupported tooth structure. Remove any tooth debris from
canal by irrigating post space with water spray.
5. Sequentially step up to the next larger ParaPost Drill until
the previously determined diameter and depth are achieved
(Fig. 21) .
6. Use a cylindrical diamond or carbide bur to prepare an
anti-rotational box without undercuts (Fig. 22) .