Fig. 1

Pre-operative X-ray

A 30 years old came to my clinic complaining with pain in a third quadrant especially to pressure and chewing.

After radiographic examination we see a poor root canal treatment and suspected floor and furcal perforation due to radiolucency in the furcal area.

Fig. 2

Re-access removing filling materials and metal post

Fig. 3

Re-access removing filling materials and metal post

Fig. 4

After re-design of access cavity and bleeding control thanks sodium hypochlorite it’s possibile see better the big perforation site.

The video shows all the steps: in big perforation its better to use sponge matrix (collagen of fibrin) to get some support for the material and to control the extrusion into periodontal tissue.

I put first of all bioceramic putty with a dedicated system in a vestibular part of perforation and than with a plugger and sterile wet cotton we close all the perforation.

Fig. 5

After the perforation I retreat and remove all the old filling material, re-shape the canals and do a second canal in a distal root that had been forgotten.

Fig. 6

Final irrigation protocol with a polymeric needle and sonic activation.

Fig. 7

Mesial canals.

Fig. 8

Distal canals. Thanks to magnification became easier manage the two distal canals which divide deeply and have independent apex.

Fig. 9

Rx for checking the working lengths.

Fig. 10

Rx for checking the obturation.

Fig. 11

Obturation of the 4 canals.

Fig. 12

Rx for checking the retreatment and the pre-prosthetic reconstruction with temporary crown.

Fig. 13

Dr. Federico Michelini

2015: Graduated in dentistry from the University of Valencia.

2017: Master in Endodontics from the University of Bologna.

Federico Michelini has been a speaker in national and international congresses regarding endodontics.

Tutor of the Master of Endodontics and of the Degree Course of Dentistry and Dental Prosthesis for the University of Bologna.

He won the Closed Meeting of Italian Society of Endodontics in 2019.

He attended the advanced course of retreatments and endodontics surgery of Italian Academy of Endodontics.

He attended the course of microscopy by Dott. Fabio Gorni.

Member of the Italian Society of Endodontics

Member Fellow of Style italiano Endodontics.

Opinion Leader and Speaker for Morita, Coltene and Labomed. 

He works in Parma and Piacenza dedicating to microscopic endodontics.


Today thanks microscope and different types of materials, as in this case MTA or Bioceramic Putty, it is possibile manage difficult cases, avoid extraction and give “new life” to dental elements.

The purpose of this article is to give at all the clinicians a right and simple protocol to use in case of perforations following the philosophy of the group: feasible, teachable, repeatable.


1- Koc C, Aslan B, Ulusoy Z, Oruçoğlu H. Sealing ability of three different materials to repair furcation perforations using computerized fluid filtration method. J DentRes Dent Clin Dent Prospects. 2021 Summer;15(3):183-187.

2- Gorni FG, Andreano A, Ambrogi F, et al. Patient and clinical characteristics associated with primary healing of iatrogenic perforation after root canal treatment: results of a long-term Italian study. J Endod. 2016;42 (2): 211-215.

3- Estrela C, Decurcio DA, Rossi-Fedele G et al. Root perforations; a review of diagnosis, prognosis and materials. Braz Oral Res. 2018 Oct 18;32 (suppl 1):e73.