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Pre-impregnated glass fiber (A) and packing the fibers into the dowel space on the working cast (B).
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A model separator of the prepared dowel space was applied on the working cast using a photocured composite resin model separator (Kota - SP - Brazil); a sheaf of glass fibers, impregnated with a proper monomer, with proper length and diameter (Vectris Pontic, Ivoclar Vivadent) was prepared (Figure 1A); the fiber was packed into the prepared dowel space with a handheld instrument, ensuring that the fiber reached the bottom, modeling the internal radicular anatomy until the total filling of the dowel space (Figure 1B).
Preparation of the composite resin core (A). Customized dowel-core system (B).
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Targis/Vectris was added to the dowel to create an appropriated form of the core (Figure 2A). The dowel and core system was polymerized using a light unit (Quick, Ivoclar Vivadent), and a furnace (Lumamat 100, Ivoclar Vivadent), to complete the foundation. The dowel and core system was finished with diamond bur and 50 mum aluminum oxide powder (Figure 2B).
Customized dowel luted prior to crown cementation.
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Arc, 3M/ESPE, Saint Paul - USA), following manufacturer's instructions (Figure 3). An indirect composite crown (Targis/Vectris) was also cemented using the same resin cement.
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Radiographic image of case 1 after 3 years.
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The patients were clinically and radiographically evaluated after 3 years of the treatment (Figures 4, 5 and 6).
Radiographic image of case 2 after 3 years.
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The patients were clinically and radiographically evaluated after 3 years of the treatment (Figures 4, 5 and 6).
Radiographic image of case 3 after 3 years. Right maxillary lateral incisor (A), right central incisor and left central incisor - note the metal core dowel (B), left lateral incisor and left canine (C).
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The patients were clinically and radiographically evaluated after 3 years of the treatment (Figures 4, 5 and 6).