UNIVERSITA' DEGLI STUDI DI CAGLIARI
FACOLTA' DI MEDICINA E CHIRURGIA
ISTITUTO DI DISCIPLINE ODONTOSTOMATOLOGICHE
E CHIRURGIA MAXILLO-FACCIALE
SCUOLA DI SPECIALIZZAZIONE IN ODONTOIATRIA E PROTESI DENTALE
Director: Prof. Ignazio MARIA CORTIS
G.PETTI *, I.M.Cortis, C.Cortis
*G.PETTI, Professor of Periodontology, Università di Sassari
Published in May-September 1992
SURGICAL TREATMENT OF 1st, 2nd AND 3rd CLASS LESIONS OF BI- AND TRIFURCATIONS
GUSTAVO PETTI
Physician and Surgeon specializing in Dentistry. Periodontist.
Piazza Repubblica 4, 09129 Cagliari, Italy.
tel ++39 070 498159, fax ++39 070 400164
web site www.gustavopetti.it
Fig. 14. Special attention goes into the shaping of the two separate crowns to allow proper hygiene in the interradicular space.
Fig. 13. On completion of healing, two teeth with temporary cores are constructed.
Fig. 15. The two definitive cast gold cores are placed in position. Fig. 16. The two gold cores are cemented and thus function as the terminal pillar of a gold-platinum-porcelain fixed prosthesis which rehabilitates the lower right side.

Fig. 18. Serious coronal damage of 2.6 and 3rd class lesions of the trifurcation. The bifurcation between the distal vestibular root and the mesial vestibular root, as well as the bifurcation between the same distal vestibular root and the palatal one are involved.
Fig. 17. On the two cores the prosthesis is made of gold and platinum only without porcelain so as to have minor thickness and to ensure a good profile in the interdental area. Consequently the correct use of interdental brushes is facilitated.
Fig. 19. The 3rd class lesion between the two vestibular roots is clearly visible.
Fig. 20. After raising a vestibular and palatal mucoperiosteal flap to gain access to the lesion, the distal vestibular root is resected.

Fig. 21. A differentiated prosthesic preparation of the root of 2.6 is readied and a deepening of the barrelling-in is practiced.

Fig. 22. Once tissues have healed, a suitably shaped Duralay core is constructed.

Fig. 23. The gold core is cast.

Fig. 25. A temporary resin crown is created, being careful to shape it in such a way as to allow the interradicular papilla between the mesial vestibular root of 2.6 and 2.7 to "breathe".
Fig. 24. The core is cemented onto the palatal and mesial vestibular root of 2.6.