Retention of a core material supported by three post head designs

Radiopacity of fiber-reinforced resins

“…Many in vitro studies have been conducted to identify and understand the factors that influence dental fiber-reinforced composite (FRC) properties [6]. Thus, FRCs became the preferred restorative material in prosthodontics, periodontics, endodontics, restorative dentistry, and orthodontics [7][8][9][10][11][12][13][14][15]. In endodontics, FRC root canal posts (FRC-RCP) have become increasingly popular in recent years [11].…”

“…In endodontics, FRC root canal posts (FRC-RCP) have become increasingly popular in recent years [11]. Researchers have investigated the material type, shape, and surface treatments of the posts to increase the adhesive and biomechanical properties of FRC-RCPs [9,10,16]. Previously, it was difficult to bond prefabricated FRC-RCPs to composite resins and tooth structures because of the highly cross-linked polymer matrix between the fibers [17].…”

Bonding of fibre-reinforced composite post to root canal dentin

“…1 The most frequent mode of failure with posts made of metal alloys has been found to be loss of retention of the post, while root fracture is still the most serious type of failure. 2 Many investigations have been made to increase the attachment of the post to the dentin, to the luting cement and to the core material for example by developing the post material, 3 the design of the post [4][5][6][7] and the surface treatment of the post. [8][9][10] A problem with the material of commonly used prefabricated FRC posts is that the polymer matrix between the fibres is highly cross-linked and due to the high degree of conversion nonreactive, which makes it very difficult to bond the prefabricated FRC posts to composite resin cement and tooth structure.…”

The failure rate of adhesively retained composite core build-ups in comparison with metal-added glass ionomer core build-ups

“…In the case of large core build-ups, the strength of the build-up material and its stable retention in the tooth stump are critical factors for the long-term success of a crown restoration. 1 Today, amalgam, glass ionomers, or composites are normally used as core build-up materials. The well-known disadvantages of amalgam (corrosion, unpleasant colour, slow setting process) and the lack of adhesion to the tooth structure were the reasons why alternative core build-up materials had to be found.…”