Use of Itena Dentoclic Glass Fiber Post in the Restoration of endodontically treated tooth

Fig. 1

Tooth 4.7 was symptomatic on percussion.

The periapical preliminary X-ray showed a poor endodontic primary treatment with short obturation in the distal root and in both mesial canals. 

Furthermore a  radiolucency was noticed on both roots.

Nonetheless, a leaking cast post and core on the lingual limit of the restoration was present. 

A diagnosis of symptomatic apical periodontitis was established.

Fig. 2

A Non Surgical root canal retreatment (NSRCrT) was planned prior to a full coverage crown.

The tooth was isolated with a 2A clamp and a NicTone medium-weight rubber dam.

Fig. 3

Screws were disassembled using ET18 ultrasonic tip (A).

The tip worked in counterclockwise direction around both distal (B) and mesio-lingual (C) posts in order to remove them.

This technique allowed the unscrewing of the posts with maximum preservation of the dental tissue. 

The posts removed (D).

Fig. 4

An additional isolation was also obtained by injecting the liquid dam around the preparation.

The pulp chamber  and the four root canals after  being cleaned and shaped. (A)

The pulp chamber aspect after 3D obturation and cleaning with ultrasonic tips under irrigation. (B) 

Fig. 5

 Dentine prepared by using of micro-etcher sandblaster (aluminium and silicon oxide powder_particle size 20-80 micron).

The Micro-etcher Sandblaster was used to clean the pulp chamber and to improve the adhesion of the bonding agents.

Fig. 6

Fiber posts fitting. 

The post must have a passive fitting, without prepare the root canal without any bur or drill. 

It’s mandatory to preserve as much as possible of the remaining dentine.

The Itena Dentoclic Glass Fiber Post are biocompatible, with no risk of corrosion or coloration  and compatible with Dentoclic drills.

Dentoclic glass-fiber posts are made of 80% unidirectional parallel oriented glass fibers embedded in 20% of epoxy-resin.

Fig. A: Microscopic observation of a Dentoclic glass-fiber cross section (SEM x500) 

Fig. 7

The posts were both prepared with alcohol and bonding as suggested by the producer of the sealer (Itena). The Itena Dentoclic Glass Fiber Post have excellent mechanical properties for a reduced risk of fracture due to: 

• an excellent resistance to flexion (836Mpa);
• its many longitudinal glass-fibers;
• elastic behavior similar to dentin.

Fig. 8

Pulp chamber,  the root canal orifices and the post space were etched with Dentoetch, (37% ortho-phosphoric acid ) that was characterized by a perfect viscosity with provided quick and easy rinse (B).

Afterward the tooth was dried with air and paper point and then primer (C) and bonding Quick Bond (D) were applied into the root canals as suggested by the producer (Itena). 

Fig. 9

Pulp chamber condition after bonding passages. 

These ensure excellent and reliable adhesion to enamel and dentin, due to a remarkable shear bond strength.

Fig. 10

Nano - filled composite dual cure material placement (Dentocore Itena) (A).

A recent study demonstrated that hardness of this material is close to the dentine one. 

Furthermore it has a low shrinkage rate, despite being a very fluid material useful to avoid bubbles in the post cementation.

Fig. 11

The Dentocore is a dual curing Material. 

Nevertheless it is suggested to cure this resin composite material for at least 40 seconds.

Due to properties of the posts composition, excellent distribution of the light in the whole material is guaranteed.

Furthermore it allows polymerization of the core build-up material on all of the post surfaces.

Fig. 12

Side and occlusal views 

of the clinical situation after the build up preparation. 

Due to both clinical and radiographic carious infiltrations, the tooth 4.6 must be treated with an indirect restorative therapy.

Fig. 13

Post operative x-ray.