Fogorvosi szemle, 2015 (108. évfolyam, 1-4. szám)

2015-12-01 / 4. szám

119

FOGORVOSI SZEMLE ■ 108. évf. 4. sz. 2015.

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Fráter M, Forster A, Jantyik Á, Braunitzer G, Nagy K

Fracture strength of elastic and conventional fibre-reinforced composite intraradicular posts- an in vitro pilot study

Objectives: The purpose of this in vitro investigation was to evaluate the reinforcing effect of different fibre-reinforced composite (FRC) posts and insertion techniques in premolar teeth when using minimal invasive post space preparation.

Materials and methods: Thirty two extracted and endodontically treated premolar teeth were used and divided into four groups (n = 8) depending on the post used (Group 1-4). 1: one single conventional post, 2: one main conventional and one collateral post, 3: one flexible post, 4: one main flexible and one collateral post. After cementation and core build-up the specimens were submitted to static fracture toughness test. Fracture thresholds and fracture patterns were recorded and evaluated.

Results: The multi-post techniques (group 2 and 4) showed statistically higher fracture resistance compared to group one. Regarding fracture patterns there was no statistically significant difference between the tested groups.

Conclusion: The application of multiple posts seems to be beneficial regarding fracture resistance independent from the used FRC post. Fracture pattern was not influenced by the elasticity of the post.

Keywords: fibre-reinforced composite, individual post, multi-post technique, minimal invasive, fracture resistance