Evaluation of fracture resistance and mode of failure of premolars restored with nanohybrid composite, ORMOCER and ceramic inlays

Gunwal, Mohit; Shenoi, Pratima; Paranjape, Tanvee; Dhote, Sonal; Tongya, Ravish; Kumar, M. Dilip; Rastogi, Sanjay

doi:10.1016/j.jobcr.2017.08.004

Cited by 9 publications

(8 citation statements)

References 27 publications

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“…By replacing a significant portion of the organic resin matrix in traditional composites with these three-dimensional polymeric materials, polymerization shrinkage (1.25% by volume) is reduced. The findings of the present study concur with those of Gunwal et al [42] They examined the fracture resistance, and mode of failure of premolars restored with nanohybrid composite, ormocer, and ceramic inlays. They found that ormocer had the best fracture resistance comparable to natural teeth.…”

Section: Discussionsupporting

confidence: 92%

Influence of Heliobond on Microtensile Bond Strength of a New BIS-GMA Free Versus BIS-GMA Containing Composite Resin Restoration

Elsebaey,

Dowidar,

Alahmed

et al. 2023

Open Access Maced J Med Sci

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AIM: The main objective of this study was to assess the micro-tensile bond strength (µTBS) of a free bisphenol-a-diglycidyl-ether-dimethacrylate (Bis-GMA) resin composite restorative material compared to a Bis-GMA-containing resin composite following the application of a hydrophobic coating (heliobond). MATERIALS AND METHODS: A flat occlusal dentin surface was exposed in a total of eighty extracted teeth that were removed for periodontal reasons. Teeth were divided into two main equal groups according to the type of applied filling materials: BIS-GMA-free versus BIS-GMA-containing resin composite (n = 40). Each main group was subdivided into two equal subgroups (n = 20) according to the application of Heliobond (hydrophobic resin coating). Heliobond has been applied after adhesive application and before resin composite application. The first group was restored by a Free Bis-GMA Resin Composite (Admira, Voco, Germany); the second group was restored by a Bis- GMA-containing resin composite (Grandio, Voco, Germany). Each tested restorative material was applied and cured according to the manufacturer’s instructions. RESULTS: Regardless of different composite and adhesive types, there was a statistically significant difference (p < 0.05) among all subgroups. Specimens with Heliobond recorded a higher µTBS mean value (30.46 ± 6.7 megapaskal [MPa]) than groups without Heliobond, which recorded µTBS mean value (23.95 ± 9.02 MPa). CONCLUSION: Application of an extra hydrophobic layer coating (Heliobond) has improved the performance of the µTBS of the adhesive systems utilized with the new BIS-GMA-free versus BIS-GMA-containing composite resin

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Section: Discussionsupporting

confidence: 92%

Influence of Heliobond on Microtensile Bond Strength of a New BIS-GMA Free Versus BIS-GMA Containing Composite Resin Restoration

Elsebaey,

Dowidar,

Alahmed

et al. 2023

Open Access Maced J Med Sci

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“…Nanohybrid composites on the other hand, have been shown to produce 65% of unfavourable fracture patterns in restored MOD premolar cavities [22]. The unfavourable fractures were suggested to have been the result of resins having poor mechanical properties [22]. The accumulated data of the presented studies concluded that both microhybrid and nanohybrid composites display significant rates of unfavourable fractures.…”

Section: Fracture Patternsmentioning

confidence: 87%

Section: Fracture Patternsmentioning

confidence: 99%

Biomimetic Approach in Tooth Conservation and Fracture Resistance: A Short Descriptive Review of Current Biomaterials and Techniques

2022

IJOH

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Background: New concepts such as biomimetic dentistry, minimally invasive approach, and the understanding of tooth biomechanics have changed the paradigm on how teeth need to be restored. The emergence of new biomaterials has allowed to improve bonding capacity, as well as the ability to reduce loading stress transmitted to the remaining tooth structure, making it possible to extend the life of a restoration and give the compromised tooth a second chance. To date, several studies have demonstrated the fracture resistance under uniaxial loading of restored Class II mesial-occlusal-distal (MOD) dental cavities in posterior teeth using different restorative biomaterials; however, many of those materials have not yet been compared with each other regarding fracture resistance. Objectives: A literature review was undertaken to revise current research focusing on the fracture resistance of MOD cavity preparations restored with different filling techniques, including microhybrid and nanohybrid composite resin, short discontinuous fiberglass reinforced composite resin, long continuous polyethylene fiber, fiberglass reinforced net, and the combination of these materials. Conclusion: This literature review offers information regarding currently used restorative biomaterials’ fracture resistance in restored MOD teeth. Most studies were conducted in vitro, demonstrating that fracture resistance under uniaxial load was higher in MOD cavity preparations restored with a combination of polyethylene fibers and composite resin (nanohybrid), followed by a combination of fiberglass and composite resin (nanohybrid). The reviewed information also revealed that the use of composite resin as a single material has the lowest fracture resistance and the highest percentage of catastrophic failures. Given the limited information regarding the combination of these biomaterials in a clinical setting it is suggested to perform controlled clinical trials by using the proposed combinations to demonstrate their clinical relevance and success ratio. Nonetheless, initial data suggests that a biomimetic restorative approach using biomaterials that connect and replace the missing tooth structure and redistribute biologically the loading stress may have a positive impact in terms of tooth preservation in MOD cavities.

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“…Ormocers are described as three dimensionally cross-linked copolymers [ 30 ] with a polymerization process that does not leave any residual monomer behind, making the ormocers more biocompatible to surrounding tissue [ 31 ]. The obtained results certainly confirm the cariostatic capabilities of ormoceric materials from the Admira group and the concentration levels of fluoride ions released from the surface of these materials can potentially aid in the remineralization of the surrounding tooth tissues.…”

Section: Discussionmentioning

confidence: 99%

Preliminary In Vitro Study of Fluoride Release from Selected Ormocer Materials

et al. 2021

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The purpose of the in vitro study presented in this paper was to determine the long-term release of fluoride ions from selected ormocer materials (Admira (A), Admira Flow (AF), Admira Seal (AS)). The release of fluoride ions from these materials into a saline solution (0.9% NaCl) and deionized water was tested for 14 weeks. In a long-term study the measurements were taken after 1 and 3 h, then 1, 2, and 3 days and then at weekly intervals for 14 weeks. In a short-term study the measurements were made after 3, 24, 48, 72, 69, 168 h, i.e., within 7 days. All materials used in the test showed a constant level of fluoride release. The highest level of cumulative release of fluoride ions into deionized water was found in the AS material (23.95 ± 4.30 μg/mm2), slightly lower in the A material (23.26 ± 4.16 μg/mm2) and the lowest in the AF material (16.79 ± 2.26 μg/mm2). The highest level of cumulative release into saline solution was found in AF (8.08 ± 1.30 μg/mm2), slightly lower in AS (7.36 ± 0.30 μg/mm2) and the lowest in A (6.73 ± 1.10 μg /mm2). After 1 h of immersion of the samples in the saline solution, the highest level of fluoride was released by AF (0.57 ± 0.06 μg/mm2) followed by A (0.20 ± 0.03 μg/mm2) and AS (0.19 ± 0.02 µg/mm2). Moreover, in the 14-week study, the total amount of fluoride release into the saline, which imitates the environment of the oral cavity, was observed as the highest in the AF sample.

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Evaluation of fracture resistance and mode of failure of premolars restored with nanohybrid composite, ORMOCER and ceramic inlays

Abstract: Based on the present study, the dentist can utilize the ORMOCER material as a restoration material for the cavities of posterior teeth which is better in terms of fracture resistance and durability of the restoration when compare to nanohybrid composite.

Cited by 9 publications

References 27 publications

Influence of Heliobond on Microtensile Bond Strength of a New BIS-GMA Free Versus BIS-GMA Containing Composite Resin Restoration

Influence of Heliobond on Microtensile Bond Strength of a New BIS-GMA Free Versus BIS-GMA Containing Composite Resin Restoration

Biomimetic Approach in Tooth Conservation and Fracture Resistance: A Short Descriptive Review of Current Biomaterials and Techniques

Preliminary In Vitro Study of Fluoride Release from Selected Ormocer Materials

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