Allan Deutsch
FIGURE 2: The countersink
drill creates a second tier and a flange seat.
FIGURE 4: Use an opaquing
agent for aesthetic restorations.
FIGURE 6: The Flexi-Flange
split-shank threaded post system in place.
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FLEXI-FLANGE patented split-shank threaded post system provides maximum
retention and minimum insertional and functional stress in cases with little
or no coronal dentin. Following are step-by-step instructions for
restoring a tooth with little or no coronal dentin using the Flexi-Flange
system (Figure 1).
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Use the depth gauge in conjunction with an x-ray to determine proper post
size.
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Begin the post-hole preparation by removing the root filling material.
Use a Gates Glidden drill to establish 100 percent of the post-hole length
and 90 percent of the post-hole width.
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Use the primary reamer to achieve 100 percent of the post-hole width.
Note: Because the Flexi-Flange fits optimally within a concentric hole,
the number of entries into the post-hole with the primary reamer should
be limited. Lubricating the canal with water or another suitable
wetting agent makes post-hole preparation easier.
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Use the countersink drill (Figure 2) to cut two tiers in one operation;
this prepares a seat for the second tier and the seat for the flange.
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Determine full seating of the post by making certain that the flange fits
flush within the preparation (Figure 3). Note: To achieve complete
seating in highly curved canals, use a diamond disk to remove sufficient
apical post length to allow full seating of the second tier and flange.
Shorten only the legs of the post after trial seating to ensure the creation
of threads in the canal with minimal stress.
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Trial-insert the Flexi-Flange with the appropriate wrench.
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Unthread the post from the canal completely and place Essential Dental
Systems’ Flexi-Flow Cem composite resin cement in the post-hole and on
the post shank.
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Thread the post back into the post-hole with light pressure. Note: The
post will seat completely with minimal resistance.
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Remove excess cement to prepare for the core buildup.
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Use a bonding agent to facilitate retention between the coronal dentin,
the post, and the core buildup material. Note: Use an opaquing agent
for aesthetic restorations (Figure 4).
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Using a core matrix, place and shape Essential Dental Systems’ Ti-Core
Natural core buildup material (Figure 5).
Figure 6 shows the final x-ray of the Flexi-Flange split-shank threaded
post system in place. The Flexi-Flange system is designed for cases
with little or no coronal dentin. It is a variation of the Flexi-Post
system, which has brought practitioners clinical success for decades.
These post systems provide maximum retention with minimal insertional and
function stress.
February-March 2003
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FIGURE 1: Flexi-Flange post
system.
FIGURE 3: Fully seat flange
into the dentin.
FIGURE 5: Example of Ti-Core
Natural core buildup.
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Flexi-Flange® patented split shank
post incorporating a flange to provide additional stability in situations
where there is inadequate coronal dentin and excessive occlusal forces
? anterior and posterior.
Features
• Stabilizing Flange maximizes dentin-to-metal
contact, distributing functional stresses over a larger area to minimize
stress concentrations at any one point.
• Split shank design closes on insertion
to deliver maximum retention with minimal stress.
• Triple tier design provides resistance
to post loosening and root/post fracture.
Manufacturer
Essential Dental Systems, Inc.
89 Leuning Street
South Hackensack, NJ 07606
Toll Free: 800-223-5394
Tel. 201-487-9090
Fax: 201-487-5120
eds@pipeline.com
www.edsdental.com
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