Fracture resistance of teeth with oval canal morphology restored using oval and circular posts

Kılınç, Halil İbrahim; Aslan, Tuğrul; Kılıç, Kerem; Er, Orhan; Esim, Emir; Yıldırım, Şahin

doi:10.2334/josnusd.15-0648

Cited by 3 publications

(6 citation statements)

References 34 publications

(38 reference statements)

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“…This is in accordance with a previous study showing that an oval fiber post did not improve adaptation to ovalshaped canal walls [21] or the fracture resistance of ETT [22]. However, previous results have been conflicting [23], possibly due to differences in methodology between studies (e.g. sample preparation parameters, testing parameters).…”

Section: Discussionsupporting

confidence: 91%

“…An ideal study design would have employed teeth with a very similar three-dimensional root canal anatomy and root dentin thickness. However, due to the wide anatomical variability of human premolars [23], the standardization process was necessary to allow comparability.…”

Section: Discussionmentioning

confidence: 99%

“…Premolars are subject to lateral forces much more frequently than molars. Most studies of fractures have used premolars loaded on the palatal cusp with an inclination of 30-45° [23] to the longitudinal axis of the tooth: this configuration generates a perpendicular compressive load on the inclined plane of the cusp. Conversely, during oral function, the occlusion generates extra-axial forces that are decomposed into vectors according to the parallelogram law.…”

Section: Discussionmentioning

confidence: 99%

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Influence of single post, oval, and multi-post restorative techniques and amount of residual tooth substance on fracture strength of endodontically treated maxillary premolars

et al. 2021

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The aim of this study was to compare the influence of the number of coronal walls and post-endodontic restorations on the mechanical strength of 165 recently extracted endodontically treated maxillary premolars. Methods: The teeth were divided into 3 control (no post) and 3 test groups according to the number of residual walls. Each test group was divided into subgroups according to the type of post-endodontic restoration (single, oval, and multi-post techniques). Samples were prepared conforming to the assigned subgroup. A universal loading machine applied a load parallel to the longitudinal axis of the teeth, thus simulating physiological occlusion. ANOVA and the Kruskal Wallis test were used for comparisons (P ≤ 0.05), and Tukey's test for multiple comparisons. Results: For intact teeth, significant differences were found among all 3 subgroups, with single post showing the highest values. For 3 residual walls, oval post resulted in significantly lower values than single and multi-post systems. For 2 residual walls, the multi-post technique showed almost twice the resistance of oval post restorations. Conclusion: In oval canals the use of a single or multi-post technique increased post-and-core resistance even in intact teeth, whereas oval fiber posts showed no improvements. Multi-post design improved fracture resistance mostly in maxillary premolars lacking both marginal ridges.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Influence of single post, oval, and multi-post restorative techniques and amount of residual tooth substance on fracture strength of endodontically treated maxillary premolars

et al. 2021

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“…[ 15 ] Kılınç et al compared the oval root canal restored with oval and circular posts and found higher fracture resistance in oval post at 10-mm length compared to circular post. [ 16 ] Kurthukoti et al on comparing the biologic, fiber, and zirconia posts found highest fracture resistance with biologic post followed by fiber-reinforced composite post and least with zirconia post in contrast to our results. [ 10 ] Panitiwat stated that fiber post with composite core improves the fracture threshold.…”

Section: Discussioncontrasting

confidence: 83%

Comparative evaluation of fracture resistance of different post systems

Paul²,

Keswani³

et al. 2017

J Int Soc Prevent Communit Dent

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Aim:The study was done to evaluate the fracture resistance of carbon, glass fiber, and zirconia posts.Materials and Methods:Forty-five human premolars indicated for orthodontic extraction were subjected to root canal treatment and obturated with gutta-percha. All the teeth were decoronated and mounted in acrylic block. Then, teeth were equally divided into three groups: (a) carbon, (b) glass fiber, and (c) zirconia post group. Post space was prepared and particular post was cemented in post space. Core buildup was made with composite. A compressive load was applied using universal testing machine and fracture force was measured in MPa. The data were tabulated, and statistical evaluation was done using statistical software IBM SPSS Statistics for Windows, version 21.0., IBM Corp., Armonk, NY, USA, using one-way analysis of variance for analysis of difference and Bonferroni post hoc test.Results:Zirconia endodontic post had good fracture resistance (489.2 MPa) when compared with carbon (258.4 MPa) and glass fiber-reinforced post (348.7 MPa). Fracture resistance was statistically significant between test groups P>0.001.Conclusion:The present study concluded that zirconia had good fracture resistance compared to glass fiber and carbon posts.

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“…Previous studies on mechanical behavior have shown that bundle GFRC posts exhibit higher bond strength compared to other systems [ 27 , 39 ]. Also, the number of thin filaments at the coronal portion enhances fitting and bonding to the intraradicular dentin surfaces, resulting in a homogenous stress distribution compared to standard GFRC posts [ 25 , 26 , 40 ]. Our results partially confirm these findings, since bundle posts have the smallest average resin cement thickness, in both vertical and horizontal cross-sections, which is in accordance with other studies in literature [ 20 , 41 ].…”

Section: Discussionmentioning

confidence: 99%

Fitting of Different Intraradicular Composite Posts to Oval Tooth Root Canals: A Preliminary Assessment

Fernandes,

Fidalgo-Pereira,

Edwards

et al. 2024

Materials

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The purpose of the present study was to perform a preliminary analysis of the fitting of different fiber-reinforced composite (GFRC) posts to tooth root canals and determine the resin cement layer thickness. The following GFRC posts were assessed: bundle posts (Rebilda GTTM, VOCO, Germany), sleeve system (SAPTM, Angelus Ind, Brazil), and accessory posts (ReforpinTM, Angelus, Brazil). Twenty-four freshly extracted mandibular single-rooted pre-molars were endodontically treated and divided into six groups, according to the type of GFRC post and resin cement (self-adhesive or conventional dual-cured). Then, specimens were cross-sectioned and inspected by optical microscopy regarding the cement layer thickness and presence of defects such as pores, voids, or fissures were assessed. Bundle and accessory posts revealed a regular distribution of resin cement with a lower number of voids than found with sleeve systems. The sleeve system posts showed poor fitting at the apical portion of the root canals. The type of resin cement did not affect the thickness of the interface, although both bundle and accessory posts allow a better distribution of resin cement and fibers. The present preliminary study reveals interesting insights on the fitting of bundle and accessory posts to root dentin and resin cement layer thickness in oval-shape root canals. The sleeve system posts showed adequate fitting only at the coronal portion of the canals.

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Fracture resistance of teeth with oval canal morphology restored using oval and circular posts

Cited by 3 publications

References 34 publications

Influence of single post, oval, and multi-post restorative techniques and amount of residual tooth substance on fracture strength of endodontically treated maxillary premolars

Influence of single post, oval, and multi-post restorative techniques and amount of residual tooth substance on fracture strength of endodontically treated maxillary premolars

Comparative evaluation of fracture resistance of different post systems

Fitting of Different Intraradicular Composite Posts to Oval Tooth Root Canals: A Preliminary Assessment

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