Comparative evaluation of the regional micro-push-out bond strength of custom-made resin post system with a prefabricated resin post: An in vitro study

Ranjithkumar, S; Velmurugan, Natanasabapathy; Roy, Anna; Hemamalathi, Senthilkumar

doi:10.4103/0970-9290.104954

Cited by 3 publications

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“…The Push-Out bond strength test possesses a good approximation of the bond strength than the conventional shear test. Push-Out fracture develops corresponding to dentin-bonding interface (23,24) , which makes it a true shear test and simulates the clinical condition more closely. Group IV with the largest diameter showed the highest Push-Out bond strength value, which may mean that decreasing the cement space between the post and root dentin wall increases the Push-Out bond strength.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Different Dentin Posts for the Treatment of Primary Anterior Teeth (An In vitro study)

El-Shaabany

Elbaz

Omer

2021

Dental Science Updates

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Introduction:Early childhood Caries is a distressing situation for patients and parents and pediatric dentists. Aim: current research was carried out to evaluate fracture resistance and bond strength for different types of dentin posts compared to fiber posts. Materials and Methods: This Current in-vitro study was conducted on 48 extracted primary incisors. Samples were split randomly into 4 groups of 12 for each group. Group-I (fiber posts 6mm length, 1.4mm diameter), Group-II (dentin posts 6mm length, 1.4 diameter), Group-III (dentin posts 8mm length, 1.4mm diameter), Group-IV (dentin posts 8mm length, 1.6mm diameter). Each group was further subdivided into two subgroups (6 for the Push-Out bond strength test and 6 for the fracture resistance test using Universal Testing Machine). Results: It was observed in the fracture resistance test that, Group III showed the highest fracture resistance means (140.678±11.98) followed by Group IV (131.38±7.03), Group-II (94.23±9.84), and finally Group-I that showed the lowest fracture resistance means (80.465±2.82). Push-Out bond strength test revealed that the highest mean value with Group-IV (8.653±1.49), followed by Group-II (6.08±2.25) and Group III (5.67±2.44) have no statistically significant difference between them, while the lowest mean value was for Group-I. Conclusions: Dentin posts showed increased fracture resistance and bond strength more than fiber posts. The use of dentin post as intra-canal retention in primary anterior teeth possesses the most important advantages over the fiber post. Therefore, biological dentin post is a successful alternative for fiber post.

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Section: Discussionmentioning

confidence: 99%

Efficacy of Different Dentin Posts for the Treatment of Primary Anterior Teeth (An In vitro study)

El-Shaabany

Elbaz

Omer

2021

Dental Science Updates

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“…The Micro-Push-Out (µPO) test is employed to measure the bond strength of luted fibre posts. It is a modification of the PO test, and it involves disks of a radicular dentin specimen with thickness less than or equal to 1 mm 2 [ 34 , 35 ]. Castellan et al ., [ 36 ] reported that a µPO approach and µTBS resulted in higher values than traditional pull-out and push-out methods.…”

Section: Types Of Bond Strength Testing Methodsmentioning

confidence: 99%

Assessment of Bonding Effectiveness of Adhesive Materials to Tooth Structure using Bond Strength Test Methods: A Review of Literature

Mourad

2018

TODENTJ

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Background:The rapid developments in the field of adhesive dental materials have led to improvements in many aspects of clinical dentistry. Adhesive bond strength plays an important role in determining the clinical performance and longevity of dental restorations. Nevertheless, bond strength tests have never been well-standardized, although a number of important recommendations have been made.Objective:The aim of this paper is to critically review the validity of different bond strength testing methods for assessment of bonding effectiveness of adhesive materials to tooth structure and discuss factors that may affect bond strength measurement.Data Collection:Relevant literature published between 1983 and 2018 was collected and reviewed from the PubMed database and Google scholar resources.Review Results:Results of the current bond testing methods should be used to compare materials tested under the same laboratory settings, but they shouldn’t be used to make direct inferences on their clinical behaviour. Shear and micro-shear tests, result in non-uniform stress distribution, stress concentration at the substrate area, and predominantly tensile stresses rather than shear stresses. Micro-tensile bond tests provide many advantages over the shear tests, although these methods are technique sensitive and labour intensive.Conclusion:Bond strength testing methods should be well-standardized, but there are many factors that cannot be fully controlled which leads to variation and misinterpretation of the data about the bonding abilities of adhesives.Clinical Significance:New adhesive materials should be subjected to a combination of testing protocols to properly assess their bonding effectiveness.

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“…9 Roots were shortened to 15 mm to standardize the length, and consequently, light distribution within the root canal during light curing, was similar to the methodology performed in previous studies. 35,36 It is possible to think that the procedure of shortening the root may have removed the cervical area, making the comparison between root thirds unfeasible. However, Galhano et al 34 demonstrated that in single-rooted teeth that were shortened to 16 mm -a value similar to that proposed in the present study, the characteristics of cervical area were still preserved, exhibiting a different morphology with increased tubule density than in the middle and apical regions.…”

Section: Discussionmentioning

confidence: 99%

Effect of endodontic sealers on push-out bond strength of CAD-CAM or prefabricated fiber glass posts

et al. 2023

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This study aimed to evaluate the effect of endodontic sealer (ES) on bond strength (BS) of prefabricated or milled-CAD-CAM (computer-aided design and computer-aided manufacturing) glassfiber-posts (GFP). Canals of 90 single-rooted teeth were prepared for filling by the single-cone technique with gutta-percha and one of the following ES: AH Plus (epoxy resin), Endofill (zinc-oxide and eugenol), and Bio-C Sealer (calcium-silicate). After post-space preparation, toothspecimens were equally divided in half according to type of GFP to be used. In the half to receive milled-CAD-CAM posts, tooth specimens were molded with acrylic resin to obtain replicas. These were scanned to enable the laboratory to produce the milled-CAD-CAM GFPs (Fiber CAD Lab, Angelus) by the subtractive technique. The other half of samples received prefabricated GFPs (Exacto, Angelus) (n=15). The GFPs were cemented with dual-cure resin cement (Panavia F2.0, Kuraray). Each root was sectioned into two slices per root region (cervical, middle, apical) that were subjected to the push-out BS test, in a universal testing machine. Failure mode (FM) was classified by scores. The BS data were submitted to generalized linear model analyses, while FM was analyzed using the chi-square test (a=0.05). BS showed no significant difference among the three ES (p > 0.05). BS was significantly higher for prefabricated (mean 10.84 MPa) versus milled-CAD-CAM GFPs (mean 6.94 MPa) (p <0.0001), irrespective of ES. The majority showed mixed failures. It could be concluded that type of ES did not affect BS of GFPs to dentin, and prefabricated-GFPs had higher bond-strength than customized-milled-CAD-CAM GFPs.

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Comparative evaluation of the regional micro-push-out bond strength of custom-made resin post system with a prefabricated resin post: An in vitro study

Abstract: Within the limitations of the study, amongst all the four groups tested, custom-made resin post luted with self-etch system (CMPR-SE) showed higher micro-push-out bond strength values in all regions when compared to the other groups.

Cited by 3 publications

References 0 publications

Efficacy of Different Dentin Posts for the Treatment of Primary Anterior Teeth (An In vitro study)

Efficacy of Different Dentin Posts for the Treatment of Primary Anterior Teeth (An In vitro study)

Assessment of Bonding Effectiveness of Adhesive Materials to Tooth Structure using Bond Strength Test Methods: A Review of Literature

Effect of endodontic sealers on push-out bond strength of CAD-CAM or prefabricated fiber glass posts

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