Seal capability of interim post and core crown with temporary cements

Abstract

The purpose of the present study was to evaluate the in vitro seal capability of interim post and core crown restorations. Eighty teeth were selected and divided into 8 groups. Four experimental groups received interim posts and core crowns. Half of each group was decoronated at the cementum-enamel junction, groups PCCH and PCZO. The other half was sectioned 2 mm coronal to the cementum-enamel junction, groups PCrZO and PCrCH. The interim post and core crowns were luted with Rely X Temp NE, groups PCrZO and PCZO; Hydro C was used for Groups PCrCH and PCCH. The control groups, PC and PCr, received uncoated post and core crowns; groups OTg and OT were left without interim post and core crowns and were totally open. Infiltration was accessed by dye exposure followed by demineralization of the teeth. The length of the infiltration was measured using digital images taken from the specimens. The images were inserted into the Image Tool 3.0 software. Kruskal-Wallis analysis of variance and Dunn's multiple comparison method were used to test for significant differences among test groups (P < .05). Groups PCrZO and PCrCH showed the least dye penetration, followed by groups PCZO and PCCH. Teeth restored with interim post and core crowns will be subject to leakage. Ethics Committee: 095/2008.

Influence of marginal fit and cement types on microleakage of all-ceramic crown systems

“…This can be explained by the solubility of the cements, which plays an important role in providing a better seal. 20 Water-soluble cements such as glass-ionomer deteriorate over time due to the deleterious effects of thermocycling. However, the insoluble resin cement absorbs water, which may help the relaxation of internal stresses caused by polymerization shrinkage.…”

Restoration of Endodontic Ally-Treated Anterior Teeth

“…Furthermore, they are prone to leakage which exposes the root filling to the oral environment and thus to bacterial penetration. 15 At the fitting stage, temporary cement can be difficult to remove from the post space and any remaining cement will also contribute to wedging stresses on the remaining root. A further disadvantage of the cast post and core is that any sharp or thin edges of remaining tooth substance must be removed to reduce the risk of chipping of the die in the laboratory.…”

Temporary cement residues affect the bond strength and dentin penetration of self‐adhesive resin cement in fiberglass post cementation

“…In temporary restorations, temporary cement is used because it has low mechanical resistance, since it facilitates its removal, but allows a marginal seal and retains the restoration (Bönecker‐Valverde, Maniglia‐Ferreira, Abi‐Rached, Gomes, & Mesquita, 2010; Lepe et al, 1999). Phenolic compounds, such as eugenol‐based sealers (Taira et al, 1992), in contact with resin‐based materials react with free radicals inhibiting the polymerization of these materials, for example, resin cements (Fujisawa & Kadoma, 1992).…”

“…The presence of temporary cement residues or their composites can have a direct impact on adhesion during permanent cementation of this posts (Erdemir et al, 2008). It has been reported in several studies that the temporary cement remnant on the abutment surface adversely affects the cementation quality between the permanent restoration and dental structures, resulting in bonding failure (Altintas et al, 2019; Bönecker‐Valverde et al, 2010). Thus, proper cleaning of the dentin after provisional cementation should be done very carefully.…”