An removal of gutta-percha and root canal sealer: a literature review and an audit comparing current practice in dental schools.

Unlabelled: Endodontic failures often require non-surgical retreatment. The most common root canal obturating material is gutta-percha (GP), used in conjunction with various sealers. GP removal can be undertaken thermally and/or mechanically with or without solvents, however, no published guidelines exist.

Quantification of all-ceramic crown margin surface profile from try-in to 1-week post-cementation.

Objectives: To use profilometry to assess the margin surface profile of all-ceramic crowns (ACC's) at try-in and 1-week after cementation with dual-cured resin (DC, RelyX ARC, 3M ESPE, St. Paul, MN, USA), self-adhesive dual-cured resin (SADC, RelyX Unicem, 3M ESPE), light-cured resin (LC, RelyX Veneer, 3M ESPE) or chemically cured resin-modified glass ionomer (RMGI, RelyX Luting Plus, 3M ESPE) luting cement.

Methods: Forty, sound, extracted, human, premolar teeth underwent a standardised preparation for ACC's.

In vitro study of mean loads and modes of failure of all-ceramic crowns cemented with light-cured or dual-cured luting cement, after 1 and 30 d of storage.

This study compared the mean loads and modes of failure of teeth restored with all-ceramic crowns (ACCs) cemented with dual-cured (RelyX ARC; 3M ESPE) or light-cured (RelyX Veneer; 3M ESPE) luting cements. Clinically, there are advantages of light-cured cements over the recommended dual-cured cements, namely increased working time, improved handling, colour stability, and a homogenous mix. Forty, sound, extracted, human, premolar teeth underwent a standardized preparation for ACCs.