Dental News - CAD/CAM-integrated glass fibre post and core restoration improves tooth fracture strength

CAD/CAM-integrated glass fibre post and core restoration improves tooth fracture strength

A recent study found that placing a CAD/CAM-integrated glass fibre post and core decreases the risk of fracture of an endodontically treated and restored tooth. (Photograph: Lighthunter/Shutterstock)

Dental Tribune International

Mon. 19. November 2018

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BEIJING, China: Researchers from the General Hospital of the Air Force of the Chinese People’s Liberation Army in Beijing recently evaluated the fracture resistance properties of maxillary incisors with flared root canals restored with CAD/CAM-integrated glass fibre posts and cores. The study found that this approach achieved improved results compared with conventional treatments.

The researchers treated 30 prepared flared root canals in vitro and restored these with CAD/CAM-integrated glass fibre posts and cores, prefabricated fibre posts and cast gold alloy, respectively. After exposure to fatigue loading, each specimen was subjected to static loading until fracture.

The findings showed that the mean fracture strengths of the teeth treated with CAD/CAM-integrated glass fibre posts and cores, and cast gold alloy were significantly higher than those restored with prefabricated fibre posts, whereas no differences were observed between the first two treatments. In addition, reparable fracture modes were mostly observed in teeth treated with CAD/CAM-integrated glass fibre posts and cores, while irreparable and catastrophic fractures were mainly found in the other teeth. These results demonstrate that, in comparison with conventional treatments, CAD/CAM-integrated glass fibre post and core restoration significantly enhances the fracture resistance of maxillary central incisors with flared root canals.

The study, titled “Fracture behaviors of maxillary central incisors with flared root canals restored with CAD/CAM integrated glass fiber post-and-core”, was published online in Dental Materials Journal on 1 November 2018 ahead of inclusion in an issue.