Three-dimensional finite element analysis of weakened roots restored with different cements in combination with titanium alloy posts

In vitro performance of self-adhesive resin cements for post-and-core build-ups: Influence of chewing simulation or 1-year storage in 0.5% chloramine solution

“…In general, a range of $7-13 GPa is reported for composite resins for core build-up [37][38][39], while that of dentin is $19 GPa [37][38][39][40] and that of the glass fiber post used in this study is 54 GPa (manufacturer's information). Thus, the elastic modulus of the composite resins is lower than that of dentin.…”

Is Adhesive Cementation of Endodontic Posts Necessary?

“…Beside the crucial aspect to choose nonremovable final restoration (34), it has been suggested that cement with an modulus of elasticity similar to that of dentin could reinforce weakened roots and reduce the stress in dentin (7). However, the influence of the elasticity of the cement layer in redistributing the stresses under fatigue loading is less relevant as the post flexibility is increased (35).…”

“…The elastic modulus of the different cements varied between ϳ8 GPa (36) for RelyX Unicem, ϳ9 GPa for LuxaCore (manufacturer's information), and ϳ13 GPa (37) to 22 GPa for zinc phosphate for cementation (powder/liguid ϭ 3:2) and as liner (powder/liguid ϭ 2:1) (7, 35), respectively. For dentin ϳ19 GPa (7,35,38,39), composite resin for core buildup ϳ7 to 13 GPa (7,38,39), and for the glass fiber post system used in this study 54 GPa (manufacturer's information) are used. It is remarkable that this glass fiber post still has a 3-fold higher elastic modulus than dentin, which questions the term "dentin-like."…”

The three‐dimension finite element analysis of stress in posterior tooth residual root restored with postcore crown

“…Li (24) demonstrated that elastic modulus was indeed one of the important parameters to evaluate property of the cements. Bonding material is the media which transmit and diffuse stress between post and dentin.…”