Longitudinal clinical evaluation of post systems: a literature review

Abstract

In this survey, retrospective and prospective clinical studies dealing with cast-post-and core and fiber posts were reviewed regarding the rate of survival of restorations and the most prevalent failures. Electronic searches of the literature were performed in MEDLINE by crossing the key words: "Fiber post and clinical study", "Fiber post and clinical evaluation", "Cast post-and-core and clinical study", and "Root post and retrospective survival study". The cut-off dates were December 1990 through the end of December 2010. Review of literature showed that several interrelated biological, mechanical, and aesthetic factors are involved in the survival rate of restorative procedures in endodontically treated teeth, and post selection should fulfill and optimize these factors. Data based on long-term clinical studies are essential for the general practitioner when making clinical decisions. An adequate selection of teeth and post system must be made, and a minimal amount of existing tooth substance should be removed. A ferrule must be present for safe indication of the fiber posts. Fiber glass posts have demonstrated good survival in clinical studies, with similar performance to cast-post-and cores. Metallic posts have good clinical survival, but the associated failures are mostly irreversible, unlike what happens with the glass fiber posts.

Fracture Resistance and Microleakage of Endocrowns Utilizing Three CAD-CAM Blocks

“…[1][2][3][4][5] The use of intraradicular post and cores is complicated by the necessity to prepare an adequate ferrule, which reduces the risk of failure through root fracture. 6 Failure of post and core systems may be due to different mechanical behaviors relative to tooth structure in response to intraoral cyclic stresses. 7 This failure can be classified as repairable failure (favorable fracture) or nonrepairable failure (catastrophic fracture) that requires extraction of the tooth and subsequent prosthetic replacement.…”

Effect of gutta-percha solvents on fiberglass post bond strength to root canal dentin

“…Various procedures and products have been developed and proposed for the rehabilitation of teeth which underwent endodontic treatment (3). A fiberglass post is commonly used because of its favorable biomechanical properties compared to cast posts (1).…”

The Comparison of Fracture Resistance of Different Post Systems Cemented With Different Luting Agents: An In Vitro Study

“…Fiber postlar, metal postlarla kıyaslandığında en iyi seçimdir çünkü metal postlara göre korozyona sebebiyet vermez, kanal tedavisinin tekrarlanacağı durumlarda postun sökümü kolaydır. Ayrıca tek seansta postun simatasyonu ve restorasyonu gerçekleştirilebilir (16,17). Ayrıca metal postun elastik modülüsü 200 GPa iken, fiber postun elastik modülüsü 40 GPa'dır ve dentinin elastik modülüsüne (18 GPa) yakındır.…”