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In vitro fracture behavior of maxillary premolars with metal crowns and several post-and-core systems.
Eur J Oral Sci. 2006 Jun; 114(3):250-6.EJ

Abstract

The in vitro fracture behavior of severely damaged premolars, restored with metal crowns with limited ferrule and several post-and-core systems, was investigated. Crowns of maxillary premolars were removed and canals were prepared with Gates Glidden drills and with Parapost drills. Groups of 11 samples were each treated with cast post-and-cores (Parapost XP, Wironium Plus) (group 1), prefabricated metal posts (Parapost XH) (group 2), prefabricated glass fiber posts (Parapost FiberWhite) (group 3), and custom-made glass fiber posts (EverStick Post) (group 4). Posts and composite cores and metal crowns in groups 2, 3, and 4 were adhesively cemented. Post-and-cores and crowns in group 1 were cemented with phosphate cement. Thermocycling was performed (6,000x, 5-55 degrees C). Two static load tests (30 degrees) were applied. During the first load test (preloading) no failures occurred. Failure modes from the second load test were categorized into favorable and unfavorable failures. Mean failure loads among the four groups (group 1, 1,845 N; group 2, 1,718 N; group 3, 1,812 N; and group 4, 1,514 N) were not significantly different. Unfavorable failures were root fractures and favorable failures were postcrown displacements. No differences in frequencies of unfavorable/favorable failures were seen among the groups. The results suggest that different post-and-core systems have no influence on the fracture behavior of severely damaged premolars restored with metal crowns with limited ferrule.

Authors+Show Affiliations

Department of Oral Function and Prosthetic Dentistry, College of Dental Science, University Medical Centre Nijmegen, Nijmegen, the Netherlands. w.fokkinga@dent.umcn.nlNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16776775

Citation

Fokkinga, Wietske A., et al. "In Vitro Fracture Behavior of Maxillary Premolars With Metal Crowns and Several Post-and-core Systems." European Journal of Oral Sciences, vol. 114, no. 3, 2006, pp. 250-6.
Fokkinga WA, Kreulen CM, Le Bell-Rönnlöf AM, et al. In vitro fracture behavior of maxillary premolars with metal crowns and several post-and-core systems. Eur J Oral Sci. 2006;114(3):250-6.
Fokkinga, W. A., Kreulen, C. M., Le Bell-Rönnlöf, A. M., Lassila, L. V., Vallittu, P. K., & Creugers, N. H. (2006). In vitro fracture behavior of maxillary premolars with metal crowns and several post-and-core systems. European Journal of Oral Sciences, 114(3), 250-6.
Fokkinga WA, et al. In Vitro Fracture Behavior of Maxillary Premolars With Metal Crowns and Several Post-and-core Systems. Eur J Oral Sci. 2006;114(3):250-6. PubMed PMID: 16776775.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - In vitro fracture behavior of maxillary premolars with metal crowns and several post-and-core systems. AU - Fokkinga,Wietske A, AU - Kreulen,Cees M, AU - Le Bell-Rönnlöf,Anna-Maria, AU - Lassila,Lippo V J, AU - Vallittu,Pekka K, AU - Creugers,Nico H J, PY - 2006/6/17/pubmed PY - 2006/9/29/medline PY - 2006/6/17/entrez SP - 250 EP - 6 JF - European journal of oral sciences JO - Eur J Oral Sci VL - 114 IS - 3 N2 - The in vitro fracture behavior of severely damaged premolars, restored with metal crowns with limited ferrule and several post-and-core systems, was investigated. Crowns of maxillary premolars were removed and canals were prepared with Gates Glidden drills and with Parapost drills. Groups of 11 samples were each treated with cast post-and-cores (Parapost XP, Wironium Plus) (group 1), prefabricated metal posts (Parapost XH) (group 2), prefabricated glass fiber posts (Parapost FiberWhite) (group 3), and custom-made glass fiber posts (EverStick Post) (group 4). Posts and composite cores and metal crowns in groups 2, 3, and 4 were adhesively cemented. Post-and-cores and crowns in group 1 were cemented with phosphate cement. Thermocycling was performed (6,000x, 5-55 degrees C). Two static load tests (30 degrees) were applied. During the first load test (preloading) no failures occurred. Failure modes from the second load test were categorized into favorable and unfavorable failures. Mean failure loads among the four groups (group 1, 1,845 N; group 2, 1,718 N; group 3, 1,812 N; and group 4, 1,514 N) were not significantly different. Unfavorable failures were root fractures and favorable failures were postcrown displacements. No differences in frequencies of unfavorable/favorable failures were seen among the groups. The results suggest that different post-and-core systems have no influence on the fracture behavior of severely damaged premolars restored with metal crowns with limited ferrule. SN - 0909-8836 UR - https://www.unboundmedicine.com/medline/citation/16776775/In_vitro_fracture_behavior_of_maxillary_premolars_with_metal_crowns_and_several_post_and_core_systems_ L2 - https://doi.org/10.1111/j.1600-0722.2006.00357.x DB - PRIME DP - Unbound Medicine ER -