An in vitro study of the tensile strength of a new titanium root post with respect to the type of luting cement used

BACKGROUND: Assessing the retentive capabilities of a new titanium root post (Optipost, Komet-Gebr. Brasseler, GmbH and Co. KG Lemgo, Germany) with a decreasing diameter shape (turret like) and how these can be improved by the choice of fixing cement. METHODS: The tensile strength was assessed in relation to the type of cement used. The following cements were tested: Compolute composite cement (Espe), C/B Crown & Bridge Luting Composite (Bisco), Diamond Link cement (DRM) with Harvard cement as a control. The cementing procedures laid down by the manufacturers were followed in the case of each cement. The results of the traction tests were analysed and compared statistically and a SEM evaluation of the root/cement and cement/post interface was carried out. RESULTS: The results showed that the highest absolute mean value (best performance) was Diamond Link cement (46.48+/-14.31 kg) which also came out best in the statistical analysis (Scheffe Test p=0.007). Analysis of the samples at the SEM confirmed the results of the traction tests. CONCLUSIONS: The characteristic <<stepped>> form of the Optipost root post and the sanding of the surface would appear to be important factors which, together with the adhesive cementing technique, lead to a high decementing resistance.