Dental Materials Journal
Online ISSN : 1881-1361
Print ISSN : 0287-4547
Original Paper
Dental materials and their performance for the management of screw access channels in implant-supported restorations
Philipp RAABChristos ALAMANOSSebastian HAHNELDimitrios PAPAVASILEIOUMichael BEHRMartin ROSENTRITT
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2017 Volume 36 Issue 2 Pages 123-128

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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.

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© 2017 The Japanese Society for Dental Materials and Devices
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