title: Dental materials and their performance for the management of screw access channels in implant-supported restorations.
abstract: Unsuccessfully sealed screw access channels of prosthetic implant abutments may lead to malodor or peri-implant diseases in gingival tissues adjacent to implant-supported restorations. Therefore, 72 sets of screw channel analogs with six different materials incorporated (Polytetrafluoroethylene (PTFE), wax, gutta-percha, cavit, endofrost-pellets and cotton pellets) were exposed (2.5 h, 37°C) to Streptococcus mutans, oralis and Candida albicans suspensions. Bacterial adherence was quantified by using the fluorescence dye, Alamar Blue/resazurin, and an automated multifunctional reader. For quantification of fungal adherence the ATP-based bioluminescence approach was used. High relative fluorescence and luminescence intensities (>10,000), indicating high adhesion of streptococci and fungi were found for cotton and endofrost-pellets and low intensities (<5,000) for wax, gutta-percha, cavit and PTFE. The quantity of bacterial and fungal adhesion differed significantly between the assessed various sealing materials. In conclusion and within the limitations of this study, wax, gutta-percha, cavit and PTFE should be preferred as sealing materials.
authors.affiliation: Department of Prosthetic Dentistry, Regensburg University Medical Center.
authors.forename: Philipp
authors.initials: P
authors.lastname: Raab
authors.forename: Christos
authors.initials: C
authors.lastname: Alamanos
authors.forename: Sebastian
authors.initials: S
authors.lastname: Hahnel
authors.forename: Dimitrios
authors.initials: D
authors.lastname: Papavasileiou
authors.forename: Michael
authors.initials: M
authors.lastname: Behr
authors.forename: Martin
authors.initials: M
authors.lastname: Rosentritt
mesh_terms: D001863:Bone Screws; D003763:Dental Leakage; D003764:Dental Materials; D019094:Dental Prosthesis, Implant-Supported; D006171:Gutta-Percha; D006801:Humans; D012387:Root Canal Filling Materials
chemical_list: D003764:Dental Materials; D012387:Root Canal Filling Materials; D006171:Gutta-Percha