IADR Abstract Archives
4-year Clinical Evaluation of the CAD/CAM One-piece Glass Fiber Post-and-core
Objectives: Objectives: This study evaluated 4-year clinical performance of CAD/CAM customized one-piece glass fiber post-and-core that restored severely damaged single root canal teeth.
Methods: 36 patients with 46 severely damaged single root canal teeth that included flared root canal, crown structure lost more than 50% or without ferrule, and slightly inclined teeth. All of them had been endodontically treated. The tooth preparation and impression procedure was the same as traditional cast metal post-and-core. After the wax pattern finished from the gypsum cast, it was 3D scanned into digital shape and one-piece glass fiber post-and-core fabricated by CAD/CAM technique with glass fiber block. Initial clinical evaluation regarding the adaptation and stability of the fiber post-and-core in vivo. After final crown were finished, followed-up annually. 4-year clinical evaluations were in relation to: retention of one piece fiber post-and-core with crown, fracture of root and material, marginal adaptation, endodontic and periodontal problem and integrity of the restoration from baseline to 48 months.
Results: Initial clinical evaluation showed 44 of 46 CAD/CAM customized fiber post-and-cores got satisfactory adaption and stability except two for mandibular incisors, in which the gaps were about 0.5mm but their retention still better than prefabricated fiber posts and resin core at root orifice. 33 patients were available for recall after 4 years and 43 restorations were evaluated (recall rate of 91.66 %), in which survival rate was 100% while no major failure displayed such as debonding and fracture . 5 crowns with slight gingivitis and margin integrity degeneration were detected because of crown margin smaller overhang or oral sanitation.
Conclusions: The CAD/CAM customized one-piece fiber post-and-core demonstrated good clinical performance after 4 years, that can partial substitute metal post-and-core or prefabricated fiber post with resin core for restoring severely damaged single root canal teeth.
Methods: 36 patients with 46 severely damaged single root canal teeth that included flared root canal, crown structure lost more than 50% or without ferrule, and slightly inclined teeth. All of them had been endodontically treated. The tooth preparation and impression procedure was the same as traditional cast metal post-and-core. After the wax pattern finished from the gypsum cast, it was 3D scanned into digital shape and one-piece glass fiber post-and-core fabricated by CAD/CAM technique with glass fiber block. Initial clinical evaluation regarding the adaptation and stability of the fiber post-and-core in vivo. After final crown were finished, followed-up annually. 4-year clinical evaluations were in relation to: retention of one piece fiber post-and-core with crown, fracture of root and material, marginal adaptation, endodontic and periodontal problem and integrity of the restoration from baseline to 48 months.
Results: Initial clinical evaluation showed 44 of 46 CAD/CAM customized fiber post-and-cores got satisfactory adaption and stability except two for mandibular incisors, in which the gaps were about 0.5mm but their retention still better than prefabricated fiber posts and resin core at root orifice. 33 patients were available for recall after 4 years and 43 restorations were evaluated (recall rate of 91.66 %), in which survival rate was 100% while no major failure displayed such as debonding and fracture . 5 crowns with slight gingivitis and margin integrity degeneration were detected because of crown margin smaller overhang or oral sanitation.
Conclusions: The CAD/CAM customized one-piece fiber post-and-core demonstrated good clinical performance after 4 years, that can partial substitute metal post-and-core or prefabricated fiber post with resin core for restoring severely damaged single root canal teeth.