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Posterior Bridge - Clinical Applications

Posterior Bridges

Dentapreg strip for posterior bridge (Dentapreg® PFU) serves a bridge framework which has enhanced strength and is therefore capable of carrying the load from occlusion.

It can be combined with virtually all crown and bridge composites for creating a pontic. Posterior bridges reinforced with Dentapreg® PFU strips may be done directly chair-side, semi‐directly in the office, or indirectly in the laboratory.

Benefits of Dentapreg® Posterior Bridges:
- versatility and unique mechanical properties
- minimally invasive
- time saving procedures

- repairable during service life

Typical clinical situations for Dentapreg® Posterior Bridges:

- Minimally invasive composite bridge in posterior region

- Long term provisional solution to delay final treatment
- Provisional bridge during an implant healing period

With Dentapreg® PFU strips, you can use different bridge retention such as wing inlay, slot, box, partial crown or crown retention depending on the particular clinical situation. Thanks to the unique mechanical properties of Dentapreg® you can build many types of bridge frameworks as deflected, deflected + brace, raised bar, multilayered horizontal or vertical and cantilever.

In order to build a reliable bridge you should follow the instructions of use and basic biomechanical principles described below.


Correct Bridge Architecture

Analogy from Civil Engeneering:

Concrete is a composite material composed of cement paste and little stones. It can a carry great compression load,  but is very weak in tension. When bent, the structure can crack and fail. This is because bending is a combination of two stresses:  compression and tension.  If a material is to withstand  bending, it needs to be strong  both in compression and in tension. To ensure this, metal bars are used to reinforce the concrete in those parts that are subjected to great tension.


Back to Dentistry:

Composite filling materials have the exact same weakness in tension as does concrete. This is because they have a very similar composition: resin and milled glass. Composite dental structures, such as posterior  bridges,  are  very often subjected  to great pressure  from occlusion and as a result bend  easily and crack.  To prevent  this  from  happening,  the  bridge  needs  to  be  reinforced  with Dentapreg® glass fiber strips. To ensure the best results, the strip should be shaped in a way to reinforce the bridge exactly where it needs to be: in the bottom part where it is subjected to great tension. Dentapreg® strips should therefore be bent as close to the gingiva as possible.




Together with Dentapreg® PINPost, Dentapreg® PFU is a very powerful tool for a minimally invasive post-endodontic treatment. It can be used as a post to retain a crown after a root canal therapy. The advantage of Dentapreg® as compared to conventional pre-fabricated posts is that Dentapreg® adapts perfectly to the shape of the root canal and does not therefore require the dentist to enlarge the root canal to accomodate the post. 
Our recommendation is to use Dentapreg
® PINPost for smaller root canals and Dentapreg® PFU for larger root canals.


For more information on how to use Dentapreg® PFU for crown retention, please consult the instructions of use.

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