IFU

Anatomized fiberglass posts: Step-by-step clinical routine

Authors: Dr. Raphael Monte Alto, Dr. Helena Klemba, Dr. Ariane Vaz Storrer, Dr. Francieli Suntak, Dr. Luany Halaiko, Jucimara Klemba and DP Miguel Abrão

INITIAL EVALUATION

After anamnesis, clinical and radiographic exams, the professionals noted the presence of a temporarily cemented total crown in acrylic composite. The endodontic treatment was adequate without painful symptoms neither periapical alteration. 

After the removal of the crown, due to the presence of little coronary remainder, the reconstruction was planned based on an anatomic fiberglass post and a future total crown in pure ceramic.

TREATMENT PERFORMED

The removal of the restoration in composite was done and the coronary remainder was evaluated. After odontometrics, using a number 2 Gates-Glidden drill, the gutta-percha was removed keeping 5mm in the apical region. With a prophylactic intra-canal brush, the cleaning of the canal was made for the removal of the remaining gutta-percha and endodontic cement. After cleaning, the DC 1 Whitepost System post was tried out. The choice for a post with a diameter narrower than the canal has as its purpose the anatomization of the post with composite. That procedure, besides allowing for a better frictional retention with the canal, allows for the positioning of the post in a very centralized manner in relation to the abutment in composite.

To prevent the composite from being retained in the canal, the canal was isolated with a water-based gel. The post was cleaned with gauze and alcohol and an adhesive was applied on its surface. With the dentin composite Vittra APS DA2 a cone was modeled, over the apical area of the fiberglass post, with dimensions compatible to the canal. The assembly was taken slowly so that the composite would copy the shape of the canal. After the total insertion of the post in its odontometrics, the cervical composite was slightly condensed for the perfect adaptation in the cervical area. With a photoactivating equipment, a 5-second photoactivation was carried out, the post was removed 2mm and then returned to the previous position followed by another light activation for 5 seconds. That procedure is done until the post comes out completely polymerized.

Before the total removal of the post, a mark is made for the identification of the vestibular face. With the post and composite outside the mouth, a complementary polymerization is carried out. The canal was washed, the post was reinserted and the coronary portion was filled with the same composite.

With the assembly in position, the preparation for the total crown is done and right away, the assembly is removed with hemostatic pliers. For the final cementation, the canal was washed with abundant water and dried with paper cones and the post was cleaned with gauze and alcohol. The Ambar Universal APS adhesive was applied inside the canal and the Allcem Core cement was used for the final cementation. After the removal of the isolation, the preparation was finished and a molding was done. The mold was sent to the laboratory Singulares (TPD Miguel Abrão) where a disilicate crown was fabricated. The crown was cemented with Allcem Veneer APS and Ambar Universal APS.

STEP BY STEP

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