AN EXPERIMENTAL ESTIMATION OF THE STRENGTH CHARACTERISTICS OF CERTAIN TYPES OF FIBERGLASS POSTS

Increasingly more non-metallic standard intra-root posts have recently been introduced into the stomatological market. The non-metallic posts functioning as dampers disseminate most part of the load applied onto the finished restoration and thereby reduce the strain in the dentin walls. The objective of the present in vitro study was to estimate the durability of post and core restorations of a single-root tooth with the use of fiberglass posts obtained from different manufacturers. It was shown that in the majority of the cases an experimental pressure applied to the post and core restorations at an angle of 30-40 degrees resulted in the vertical or slanting fracture of the root. It turned out that the force responsible for the root destruction was significantly different when fiberglass posts from different manufacturers were used despite their equal diameter and the depth of immersion into the root.

fiberglass posts, root of the tooth, flexing strength