Threaded endodontic dowels: Effect of post design on incidence of root fracture

Felton, David A.; Webb, E. Leland; Kanoy, B.E.; Dugoni, Jay

doi:10.1016/0022-3913(91)90159-t

Cited by 49 publications

(32 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies (González-Lluch et al 2014) highlighted that, although a large number of in vitro studies in the literature have investigated the effect of different restoration parameters, such as the post material, length, diameter or longitudinal shape, contradictory results have been obtained in some cases (Standlee et al 1972;Kurer et al 1977;Ruemping et al 1979;Miller 1982;Cooney et al 1986;Felton et al 1991;Standlee & Caputo 1992;Chang & Millstein 1993;Zalkind et al 2000;Balbosh & Kern 2006). For example, some studies found that the restoration was stronger with the use of fibre posts than when metallic posts were employed (Isidor et al 1996;Akkayan & Gülmez 2002;Barjau-Escribano et al 2006;González-Lluch et al 2009), others (Raygot et al 2001;Hu et al 2003) did not observe any significant differences and still others (Sidoli et al 1997;Martinez-Insua et al 1998) concluded that restorations with metallic posts are stronger than those with composite fibre posts.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the effect of design parameters and their interactions on the strength of dental restorations with endodontic posts, using finite element models and statistical analysis

González-Lluch

Pérez-González

2015

Computer Methods in Biomechanics and Biomedical Engineering

View full text Add to dashboard Cite

Many previous studies, both in vitro and with model simulations, have been conducted in an attempt to reach a full understanding of how the different design parameters of an endodontically-restored tooth affect its mechanical strength. However, differences in the experimental set-up or modelling conditions and the limited number of parameters studied in each case prevent us from obtaining clear conclusions about the real significance of each parameter. In this work, a new approach is proposed for this purpose based on the combination of a validated 3D parametric biomechanical model of the restored tooth and statistical analysis using full factorial analysis of variance. A twostep approach with two virtual tests (with, respectively, 128 and 81 finite element models) was used in the present work to study the effect of several design parameters on the strength of a restored incisor, using full factorial designs. Within the limitations of this study, and for cases where the parameters are within the ranges that were tested, the conclusions indicate that the material of the post is the most significant factor as far as its strength is concerned, the use of a low Young's modulus being preferable for this component. Once the post material has been chosen, the geometry of the post is of less importance than the Young's modulus selected for the core or, especially, for the crown.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of the effect of design parameters and their interactions on the strength of dental restorations with endodontic posts, using finite element models and statistical analysis

González-Lluch

Pérez-González

2015

Computer Methods in Biomechanics and Biomedical Engineering

View full text Add to dashboard Cite

show abstract

“…1 The fundamental importance of preserving the remaining tooth structure to provide strength and resistance to fracture after both endodontic therapy and post-space preparation has been previously reported. [2][3] Dentin wall thickness is stated to be directly proportional to the ability to withstand lateral forces. 4 Simulated immature teeth with excessively enlarged access cavities received a strengthening effect by using resin-modified glass ionomer cements and resin composite with and without cast posts and cores or prefabricated posts.…”

Section: Introductionmentioning

confidence: 99%

Load Capability of Excessively Flared Teeth Restored with Fiber-reinforced Composite Posts and All-ceramic Crowns

Naumann¹,

Preuß²,

Frankenberger³

2006

Operative Dentistry

View full text Add to dashboard Cite

SUMMARYThis investigation evaluated the stabilizing effect of glass fiber reinforced posts (FRP) luted with self-adhesive universal cement on the fracture resistance of excessively flared endodontically treated teeth (ETT). Values were compared to teeth with no ferrule, 2 mm ferrule and resin cement for luting with 2 mm ferrule.Thirty-two caries-free maxillary central incisors were randomly assigned to 4 groups (n=8) and endodontically treated. Two groups were flattened 2 mm above and 2 groups at the cemento-enamel junction (CEJ). The teeth received FRPs as follows: 1) post was cemented with selfadhesive cement (RelyX Unicem, 3M ESPE) (U), no ferrule (F) was prepared, root canal entrance was excessively flared with a remaining wall thickness of 0.5 -0.75 mm (UNF/flared); 2) post was cemented with U, no F was prepared; 3) post was luted with U, F was prepared; 4) post was cemented with a resin cement (Panavia F, Kuraray, Japan), F was prepared. All specimens were built-up using a resin composite (Clearfil Core, Kuraray). All-ceramic crowns were adhesively luted (U). Specimens were exposed to thermo-mechanical loading and statically loaded until failure. INTRODUCTIONThe restoration of a tooth with excessively flared root canal entrances is clinically problematic with an endodontically-treated tooth (ETT). Flaring might be attributed to immature development of the root, serious structural damage by carious lesions, previous restoration with large post diameters or over-instrumentation The fracture resistance of excessively flared endodontically-treated teeth (ETT) without ferrule preparation is not acceptable. Adhesively luted FRC posts with 2 mm ferrule are recommended.

show abstract

“…Active threaded posts induce more stress into the dentin and carry with them a higher risk of root fracture (Felton et al 1991 ). Threaded posts, therefore, should only be used in teeth with substantial remaining root thickness (Schwartz and Robbins 2004 ).…”

Section: Post Placement Complications and Managementmentioning

confidence: 98%

Endodontic Considerations for the Restoration of Endodontically Treated Teeth

Barsness

Roach

2016

Restoration of Root Canal-Treated Teeth

View full text Add to dashboard Cite

The aim of this chapter is to offer a guide, from the endodontist's perspective, as to how root canal-treated teeth should be restored, and to give some clinical recommendations to help meet these restorative goals. The endodontic and restorative components of treatment are typically considered as independent phases. However, when considering the impact of each of these phases on the long-term prognosis of the tooth, it becomes apparent that both the endodontic and restorative plans should be considered jointly before treatment is carried out. With so many options for the timing of treatment, endodontic and restorative materials, and restoration design, the clinician is left with some diffi cult decisions at the treatment planning phase. In this chapter, considerations for the material characteristics, restoration design, and management of post placement complications are presented and discussed with respect to their impact on longterm prognosis. In addition, treatment sequencing, techniques of temporization, and strategies to prevent coronal microleakage of endodontically treated teeth are discussed in detail.

show abstract

Threaded endodontic dowels: Effect of post design on incidence of root fracture

Cited by 49 publications

References 18 publications

Analysis of the effect of design parameters and their interactions on the strength of dental restorations with endodontic posts, using finite element models and statistical analysis

Analysis of the effect of design parameters and their interactions on the strength of dental restorations with endodontic posts, using finite element models and statistical analysis

Load Capability of Excessively Flared Teeth Restored with Fiber-reinforced Composite Posts and All-ceramic Crowns

Endodontic Considerations for the Restoration of Endodontically Treated Teeth

Contact Info

Product

Resources

About