Tags

Type your tag names separated by a space and hit enter

Fracture strength of prefabricated all-ceramic posterior inlay-retained fixed dental prostheses.
Dent Mater. 2010 Jan; 26(1):67-75.DM

Abstract

OBJECTIVES

The purpose of this in vitro study was to compare the centric and eccentric quasi-static and fatigue fracture strength of industrially prefabricated resin-bonded three-unit inlay-retained fixed dental prostheses (IPIRFDPs). The IPIRFDPs consisted of industrial manufactured yttria-stabilized tetragonal zirconia (Y-TZP) frameworks with an industrially added microhybrid composite veneering.

METHODS

Identical IPIRFDP-models consisted of a second premolar, a missing first molar and a second molar (CoCrMo alloy) integrated in a low melting alloy base. Roots were covered with a soft silicone layer to simulate an artificial parodontium. Premolars had an occlusal-distal inlay-preparation and molars a mesial-occlusal inlay-preparation. Forty-two IPIRFDPs with a connector size of 9 mm(2) and a framework connector size of 4.7 mm(2) were cemented adhesively to the IPIRFDP-models. Quasi-static fracture strength was tested with centric (n=12) and eccentric (n=6) loading in a universal testing machine at a cross-head speed of 1 mm/min. Fatigue fracture strength was tested at 1200 N with centric loading (n=12) and at 600/500 N with eccentric loading (n=6) at a frequency of 0.5 Hz. Statistical comparison of groups was performed with the Mann-Whitney U test.

RESULTS

Quasi-static fracture strength differed significantly between centric (1749 N) and eccentric loading (880 N, p<0.001). Mean loading cycles until fracture were 4432 for centric loading at 1200 N compared to only 3 and 410 loading cycles for eccentric loading at 600 and 500 N, respectively.

SIGNIFICANCE

Considering the maximum chewing forces in the molar region, it seems clinically possible to use prefabricated IPIRFDPs with Y-TZP as a core material with a framework connector size of 4.7 mm(2).

Authors+Show Affiliations

Department of Prosthodontics, Propaedeutics and Dental Materials, Dental School, Christian-Albrechts University Kiel, Arnold-Heller-Strasse 16, 24105 Kiel, Germany. cmehl@proth.uni-kiel.deNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19836829

Citation

Mehl, Christian, et al. "Fracture Strength of Prefabricated All-ceramic Posterior Inlay-retained Fixed Dental Prostheses." Dental Materials : Official Publication of the Academy of Dental Materials, vol. 26, no. 1, 2010, pp. 67-75.
Mehl C, Ludwig K, Steiner M, et al. Fracture strength of prefabricated all-ceramic posterior inlay-retained fixed dental prostheses. Dent Mater. 2010;26(1):67-75.
Mehl, C., Ludwig, K., Steiner, M., & Kern, M. (2010). Fracture strength of prefabricated all-ceramic posterior inlay-retained fixed dental prostheses. Dental Materials : Official Publication of the Academy of Dental Materials, 26(1), 67-75. https://doi.org/10.1016/j.dental.2009.07.013
Mehl C, et al. Fracture Strength of Prefabricated All-ceramic Posterior Inlay-retained Fixed Dental Prostheses. Dent Mater. 2010;26(1):67-75. PubMed PMID: 19836829.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fracture strength of prefabricated all-ceramic posterior inlay-retained fixed dental prostheses. AU - Mehl,Christian, AU - Ludwig,Klaus, AU - Steiner,Martin, AU - Kern,Matthias, PY - 2008/12/19/received PY - 2009/07/23/revised PY - 2009/07/29/accepted PY - 2009/10/20/entrez PY - 2009/10/20/pubmed PY - 2010/3/5/medline SP - 67 EP - 75 JF - Dental materials : official publication of the Academy of Dental Materials JO - Dent Mater VL - 26 IS - 1 N2 - OBJECTIVES: The purpose of this in vitro study was to compare the centric and eccentric quasi-static and fatigue fracture strength of industrially prefabricated resin-bonded three-unit inlay-retained fixed dental prostheses (IPIRFDPs). The IPIRFDPs consisted of industrial manufactured yttria-stabilized tetragonal zirconia (Y-TZP) frameworks with an industrially added microhybrid composite veneering. METHODS: Identical IPIRFDP-models consisted of a second premolar, a missing first molar and a second molar (CoCrMo alloy) integrated in a low melting alloy base. Roots were covered with a soft silicone layer to simulate an artificial parodontium. Premolars had an occlusal-distal inlay-preparation and molars a mesial-occlusal inlay-preparation. Forty-two IPIRFDPs with a connector size of 9 mm(2) and a framework connector size of 4.7 mm(2) were cemented adhesively to the IPIRFDP-models. Quasi-static fracture strength was tested with centric (n=12) and eccentric (n=6) loading in a universal testing machine at a cross-head speed of 1 mm/min. Fatigue fracture strength was tested at 1200 N with centric loading (n=12) and at 600/500 N with eccentric loading (n=6) at a frequency of 0.5 Hz. Statistical comparison of groups was performed with the Mann-Whitney U test. RESULTS: Quasi-static fracture strength differed significantly between centric (1749 N) and eccentric loading (880 N, p<0.001). Mean loading cycles until fracture were 4432 for centric loading at 1200 N compared to only 3 and 410 loading cycles for eccentric loading at 600 and 500 N, respectively. SIGNIFICANCE: Considering the maximum chewing forces in the molar region, it seems clinically possible to use prefabricated IPIRFDPs with Y-TZP as a core material with a framework connector size of 4.7 mm(2). SN - 1879-0097 UR - https://www.unboundmedicine.com/medline/citation/19836829/Fracture_strength_of_prefabricated_all_ceramic_posterior_inlay_retained_fixed_dental_prostheses_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0109-5641(09)00299-1 DB - PRIME DP - Unbound Medicine ER -