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Loading standardization of postendodontic restorations in vitro: impact of restorative stage, static loading, and dynamic loading.
Oper Dent. 2012 Jan-Feb; 37(1):71-9.OD

Abstract

OBJECTIVE

The load capability of post-restored endodontically treated teeth (ETT) can be determined at different restorative stages. It was the aim of this study to compare the load capability of ETT at these stages.

MATERIALS AND METHODS

Maxillary central incisors were divided into 4 groups (n=10) and endodontically treated. Specimens were restored with: (I) only glass fiber posts (GFP); (II) GFP and composite build-up with 2 mm ferrule; (III and IV) with additional adhesively luted all-ceramic crowns. Group (I) to (III) were statically loaded, and group (IV) was exposed to thermomechanical loading (TML) and subsequent static loading.

RESULTS

The lowest median load level of 73 N was determined for group (I). The maximum median load value of 331 N was found for group (III). The comparison of Fmax [N] of group (I), (II) and (III) revealed significant differences between the groups (p<0.001). The specimens of group (IV) failed at significantly lower load values (p<0.005) as similarly restored specimens of group (III) which were only statically loaded. The stage of restoration and TML loading prior to static loading had a significant impact on fracture patterns (p=0.006).

CONCLUSION

Every additional restorative step torwards a final crown-restored ETT significantly increased the load capability. TML prior to load-to-fracture testing of the complete restorative complex, ie. post, core and crown, significantly decreased maximum load capability.

Authors+Show Affiliations

Department of Prosthodontics, Universitätsmedizin Berlin, Berlin, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

21913857

Citation

Sterzenbach, G, et al. "Loading Standardization of Postendodontic Restorations in Vitro: Impact of Restorative Stage, Static Loading, and Dynamic Loading." Operative Dentistry, vol. 37, no. 1, 2012, pp. 71-9.
Sterzenbach G, Rosentritt M, Frankenberger R, et al. Loading standardization of postendodontic restorations in vitro: impact of restorative stage, static loading, and dynamic loading. Oper Dent. 2012;37(1):71-9.
Sterzenbach, G., Rosentritt, M., Frankenberger, R., Paris, S., & Naumann, M. (2012). Loading standardization of postendodontic restorations in vitro: impact of restorative stage, static loading, and dynamic loading. Operative Dentistry, 37(1), 71-9. https://doi.org/10.2341/10-355-L
Sterzenbach G, et al. Loading Standardization of Postendodontic Restorations in Vitro: Impact of Restorative Stage, Static Loading, and Dynamic Loading. Oper Dent. 2012 Jan-Feb;37(1):71-9. PubMed PMID: 21913857.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Loading standardization of postendodontic restorations in vitro: impact of restorative stage, static loading, and dynamic loading. AU - Sterzenbach,G, AU - Rosentritt,M, AU - Frankenberger,R, AU - Paris,S, AU - Naumann,M, Y1 - 2011/09/13/ PY - 2011/9/15/entrez PY - 2011/9/15/pubmed PY - 2012/4/6/medline SP - 71 EP - 9 JF - Operative dentistry JO - Oper Dent VL - 37 IS - 1 N2 - OBJECTIVE: The load capability of post-restored endodontically treated teeth (ETT) can be determined at different restorative stages. It was the aim of this study to compare the load capability of ETT at these stages. MATERIALS AND METHODS: Maxillary central incisors were divided into 4 groups (n=10) and endodontically treated. Specimens were restored with: (I) only glass fiber posts (GFP); (II) GFP and composite build-up with 2 mm ferrule; (III and IV) with additional adhesively luted all-ceramic crowns. Group (I) to (III) were statically loaded, and group (IV) was exposed to thermomechanical loading (TML) and subsequent static loading. RESULTS: The lowest median load level of 73 N was determined for group (I). The maximum median load value of 331 N was found for group (III). The comparison of Fmax [N] of group (I), (II) and (III) revealed significant differences between the groups (p<0.001). The specimens of group (IV) failed at significantly lower load values (p<0.005) as similarly restored specimens of group (III) which were only statically loaded. The stage of restoration and TML loading prior to static loading had a significant impact on fracture patterns (p=0.006). CONCLUSION: Every additional restorative step torwards a final crown-restored ETT significantly increased the load capability. TML prior to load-to-fracture testing of the complete restorative complex, ie. post, core and crown, significantly decreased maximum load capability. SN - 0361-7734 UR - https://www.unboundmedicine.com/medline/citation/21913857/Loading_standardization_of_postendodontic_restorations_in_vitro:_impact_of_restorative_stage_static_loading_and_dynamic_loading_ L2 - https://meridian.allenpress.com/operative-dentistry/article-lookup/doi/10.2341/10-355-L DB - PRIME DP - Unbound Medicine ER -