Internal and Marginal Adaptation of Adhesive Resin Cements Used for Luting Inlay Restorations: An In Vitro Micro-CT Study

Abstract

Adequate internal adaptation and marginal sealing of resin luting cements are of particular importance for the success of cemented ceramic inlays. The purpose of this study was to investigate the initial adaptation of different resin cements at the tooth-inlay restoration interface at enamel versus dentin surfaces. Thirty-two extracted human molars were allocated to four groups. One Class II cavity was prepared in each tooth. In each group, half of the cavities’ gingival floors were on enamel while the other halves were on cementum. Lava Ultimate CAD/CAM inlays were luted to the cavities using the following adhesive systems: RelyX Unicem, RelyX Ultimate, eCement, and Variolink Esthetic DC. After staining teeth with silver nitrate solution, marginal and internal gap volumes were determined using micro-CT images. Statistical analyses were conducted by independent t test and one-way ANOVA followed by post hoc Tukey test (p < 0.05). The internal and marginal gap volume values were the highest for Variolink Esthetic DC at the dentin surface (0.629 ± 0.363) and (2.519 ± 1.007), respectively, and the lowest for RelyX Unicem at the enamel surface (0.005 ± 0.004) and (0.009 ± 0.003), respectively. The internal and marginal adaptation on the enamel surface for RelyX Unicem and RelyX Ultimate resin cements were comparable to each other and to eCement but significantly better than Variolink Esthetic DC cement. Regardless of the adhesive resin system used, adaptation on enamel is superior to that on dentin surfaces.

Resin cement selection for different types of fixed partial coverage restorations: A narrative systematic review

“…− Where the isolation is difficult (Kaneshiro et al, 2008;Manso et al, 2011). − Inlays and onlays when there are little tooth structure (Ashy & Marghalani, 2022;Sunico-Segarra & Segarra, 2015).…”

“…The clinical outcomes, performance, and success of PCRs are largely affected by appropriate cement selection. Adhesive cements comprise a wide range of types, compositions, and characteristics (Figure 1 and Table 1 ) (Abo‐Hamar et al, 2005 ; Ashy & Marghalani, 2022 ; Behr et al, 2009 ; Borges et al, 2008 ; Bouillaguet et al, 2000 ; Burgess et al, 2010 ; Carvalho et al, 2004 ; Casselli & Martins, 2006 ; Cekic et al, 2007 ; Christensen, 2002 , 2007 ; D'Arcangelo et al, 2009 ; D'Arcangelo, De Angelis, Vadini, Carluccio, 2012 ; D'Arcangelo, De Angelis, Vadini, & D'Amario, 2012 ; D'Arcangelo et al, 2014 ; Frankenberger et al, 2008 ; Gregor et al, 2014 ; Hackman et al, 2002 ; Heboyan et al, 2023 ; Hekimoğlu et al, 2000 ; Kilinc et al, 2011 ; Manso & Carvalho, 2017 ; Manso et al, 2011 ; Meerbeek et al, 2005 ; Pan et al, 2015 ; Pegoraro et al, 2007 ; Petrie et al, 2001 ; Pissaia et al, 2015 ; Piwowarczyk et al, 2012 ; Rosenstiel et al, 1998 ; Sadan et al, 2005 ; Sensat et al, 2002 ; Simon & Darnell, 2012 ; Simon & de Rijk, 2006 ; Sunico‐Segarra & Segarra, 2015 ; Swift & Bayne, 1997 ; Tanoue et al, 2003 ; Vargas et al, 2011 ; Viotti et al, 2009 ; Vrochari et al, 2009 ). This review aimed at selecting resin cements for different types of PCRs and investigated if the type of restorations or restorative materials had any effect on the type of selected resin cement.…”

“… Where the isolation is difficult (Kaneshiro et al, 2008 ; Manso et al, 2011 ). High‐strength (no glass) ceramics (Abo‐Hamar et al, 2005 ; Manso et al, 2011 ) Metal‐based restorations (Abo‐Hamar et al, 2005 ; Manso et al, 2011 ) Compromised retention (Sunico‐Segarra & Segarra, 2015 ) Inlays and onlays when there are little tooth structure (Ashy & Marghalani, 2022 ; Sunico‐Segarra & Segarra, 2015 ). When the preparation walls are mainly dentin without enamel (Abo‐Hamar et al, 2005 ; Manso et al, 2011 ).…”

“…Inlays and onlays when there are little tooth structure (Ashy & Marghalani, 2022 ; Sunico‐Segarra & Segarra, 2015 ).…”

“…The clinical outcomes, performance, and success of PCRs are largely affected by appropriate cement selection. Adhesive cements comprise a wide range of types, compositions, and characteristics (Figure 1 and Table 1) (Abo-Hamar et al, 2005;Ashy & Marghalani, 2022;Behr et al, 2009;Borges et al, 2008;Bouillaguet et al, 2000;Burgess et al, 2010;Carvalho et al, 2004;Casselli & F I G U R E 1 The classification of commercially available resin cements based on the application procedure.…”