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Inside Dentistry
December 2012
Volume 8, Issue 12

A Perfect Post-and-Core

A new system from Pentron Clinical provides durable, stable restorations.

Pentron Clinical has introduced a post-and-core system that adheres to current adhesion and restorative principles while providing additional clinical attributes. The FibreKleer™4X™Post System combined with Build-It® FR™Fiber Reinforced Core Material offers a comprehensive, versatile approach to post-and-core restorations, delivering strength and flexibility.

The FibreKleer™4X™Post System Kit includes color-coded corresponding drills and posts loaded in a bur block for easy access and placement. The posts are constructed from translucent glass fibers that are bundled in a proprietary clear resin matrix and presented in three body designs—parallel, tapered, and original. A distinguishing feature of this post design is its superior radiopacity, which is not only critical when placing the post for accurate crown-to-root-length ratio, but also for future evaluation. Also extremely advantageous in adhesion dentistry is its ability to initiate an immediate restoration, because its fiber design allows the transmission of light from the coronal aspect to the apical tip when light-curing.

Complementing the post system is Build-It® FR™Fiber Reinforced Core Material, also from Pentron Clinical. This dual-cure core material releases fluoride and contains specially treated glass fibers that enhance the material’s excellent compressive strength. From a clinical performance standpoint, Build-It® FR™ cuts very much like dentin, is radiopaque, and is available in five shades. A key feature in core build-ups is the ease with which the material is applied to the preparation. Build-It® FR™ flows easily into the core preparation and can easily be stacked onto a post without slumping. Each surface carries a 20-second cure recommendation.

Patient Case

An 11-year-old patient presented with previous endodontic therapy completed on tooth No. 30. Due to the amount of tooth structure in jeopardy, an immediate post-and-core restorative technique was performed, and a permanent crown restoration was planned for 2 to 3 years in the future, when the patient was older.

Once the patient was locally anesthetized, the temporary and cotton pellet were removed from tooth No. 30 (Figure 1). The FibreKleer™4X™Post System was chosen. A 1-mm red post drill was used to remove gutta-percha from the distal canal. The desired post length into the canal was achieved and confirmed. A corresponding red FibreKleer™4X™ parallel post was selected, and its fit verified. A Tofflemire matrix band was secured into position for isolation.

The core preparation was scrubbed with a chlorhexidine pellet and the post space was flushed with EDTA, and then air-dried. Paper points further dried the post space. A self-etching bonding agent, Nano-Bond® Nano-Particulate Reinforced Adhesive (Pentron Clinical), was applied to the core preparation according to the manufacturer’s instructions and light-cured. Breeze® Self-Adhesive Resin Cement (Pentron Clinical) was mixed and used to coat the FibreKleer™4X™ parallel red post, which was seated into the distal canal (Figure 2). Excess cement was immediately removed and Build-It® FR™ shade A2 was delivered to the preparation via the mini syringe, then light-cured for 40 seconds. This mono-block technique was ideal to initiate and achieve both an apically transmitted cure while curing the core build-up (Figure 3). The matrix band was removed, and the occlusion was adjusted and verified (Figure 4).

This article was written by Lori Trost, DMD, a private practitioner in Columbia, Illinois.

For more information, contact:
Pentron Clinical
Phone: 800-551-0283


The preceding material was provided by the manufacturer. The statements and opinions contained therein are solely those of the manufacturer and not of the editors, publisher, or the Editorial Board of Inside Dentistry.

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