Development and characterization of biological bovine dentin posts

Penelas, Alice Gonçalves; Silva, Eduardo Moreira da; Poskus, Laiza Tatiana; Alves, Amanda Cypriano; Simões, Isis Ingrid Nogueira; Hass, Viviane; Guimarães, J.R.C.

doi:10.1016/j.jmbbm.2019.01.018

Cited by 4 publications

(3 citation statements)

References 60 publications

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“…The reconstructive dental materials must contain properties that ensure the integrity of the teeth when confronting masticatory or parafunctional forces, in turn allowing them to be subtly dissipated through dental substrates [ 13 , 19 ]. The present study attempted to evaluate the fracture resistance of biological and glass fiber posts cemented to human teeth.…”

Section: Discussionmentioning

confidence: 99%

“…The morphology of coronal dentin and enamel is similar when comparing bovine and human teeth. Moreover, bovine teeth provide other advantages, such as greater availability, larger dimensions, and radiodensity similar to human dentin [ 11 – 13 ]. In addition, ethics committees around the world have stimulated the replacement of human teeth with animal ones for researches purposes [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Resistance to fracture of intraradicular posts made of biological materials

et al. 2020

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Background The aim was to analyze the fracture resistance of human teeth treated endodontically and restored with posts made of bovine dentin, human dentin, or glass fiber, and to evaluate the fracture pattern. Methods Cylindrical posts of 1.5 mm in diameter cemented to the roots of human maxillary canines presented a length of 15 mm, cervical diameter of 5–5.5 mm in the mesiodistal direction, and 7–7.5 mm in the vestibule-palatal direction. The groups studied were: Group I—10 glass fiber posts; Group II—10 human dentin posts; Group III—10 bovine dentin posts (self-adhesive resin cement); and Group IV—10 bovine dentin posts (resin-modified glass-ionomer cements). The coronal part of tooth was restored with a standardized core build-up using composite. All of the groups were submitted to a compression force test and the resistance to fracture was verified using a universal testing machine. The fracture pattern was likewise evaluated. Results The values of resistance to fracture were: 723.3N in group I, 561.5N in group II, 556.6N in group III, and, 613.27N in group IV. However, no statistically significant difference was observed among the groups. The fractures in groups I and II were most commonly found in the middle/apical third and were considered irreparable. For restored teeth in group III, half of the fractures appeared in the cervical third and were reparable. In group IV, all of the fractures were reparable, with the majority in the cervical thirds. Conclusion Bovine dentin can be used as intraradicular post to substitute human dentin and glass fiber posts. The greater the malleability of the post, the greater the chances of survival of the teeth when subjected to fracture testing.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Resistance to fracture of intraradicular posts made of biological materials

et al. 2020

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“…Additionally, the benefits of bovine teeth include their bigger size, ease of finding them in sound forms, and increased availability. 9,10 The dental glass fiber posts are made up of glass fibers inserted uni-directionally into a resin matrix. Their benefits include stress distribution across a large surface area and raising the load threshold.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Different Post and Core Systems for Restoring Pulpectomized Primary Incisors: An In-Vitro Study

Mansour,

Wahba,

Abdellatif

et al. 2024

Ain Shams Dental Journal

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Aim: This in-vitro study was conducted to assess the fracture resistance (FR) of different post and core systems for restoring pulpectomized primary incisors. Materials and methods: Forty extracted primary incisors were collected, prepared, and then obturated using Metapex. Teeth were allocated into four groups. Group (A): teeth restored with human dentin posts; Group (B): bovine dentin posts; Group (C): glass fiber posts; and Group (D): orthodontic stainless-steel wire in omega-form posts. Dentin blocks were obtained from the roots of extracted human maxillary premolars and bovine permanent incisors to fabricate the dentin posts. These blocks were formed into post shapes using a Computer Numerical Control (CNC) machine. The posts underwent cementation using glass ionomer cement, followed by coronal buildup with composite. After thermocycling, the FR and mode of failure were examined. The FR was analyzed using the Kruskal-Wallis test, while the mode of failure was analyzed using the Monte Carlo test. P-values ≤ 0.05 were used to determine statistical significance. Results: The median maximum compressive load in group (A) was 386.87 N, in group (B) it was 379.27 N, in group (C) it was 522.16 N, and in group (D) it was 469.14 N. The differences between the groups were not statistically significant regarding the maximum compressive load and the failure mode. Conclusion: Glass fiber posts and omega posts had higher FR compared to dentin posts, although the four groups can be used effectively for restoring pulpectomized primary incisors.

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Biocompatibility, thermal and mechanical properties of glass fiber‐reinforced polybenzoxazine composites as a potential new endodontic post

Mora,

Rimdusit,

Karagiannidis

et al. 2024

Polymer Composites

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A novel dental fiber post from glass fiber‐reinforced polybenzoxazine (PBZ) composites was developed in this work. The essential properties, that is, chemical characteristics, thermal and biological properties of the PBZ composites were investigated for various glass fiber loadings (10.5, 23.7, 41.2 and 65.1 vol%). Finite element analysis (FEA) was also utilized to observe mechanical behaviors of the tooth model repaired with PBZ composite posts compared to a natural tooth model. The findings reveal that for the fiber‐reinforced PBZ composites not only their thermal properties were significantly improved, but they also showed enhanced cytocompatibility; we found a coefficient of thermal expansion of 12.8 ppm/°C and cell viability of 91.55 for the 65.1 vol% glass fiber‐reinforced PBZ composite. Moreover, samples reinforced with higher glass fiber loadings effectively resulted in the reduction of stress distribution in dentin observed from FEA suggesting protection againt root fractures. Restoration using the PBZ composite post showed the same stress patterns in the dentin‐composite resin‐post interface of the repaired tooth as in the natural tooth model. The results revealed that the glass fiber‐reinforced PBZ composites possess good thermal properties and mechanical behaviors which renders them suitable candidates for biocompatible dental materials.Highlights The glass fiber/polybenzoxazine (GF/PBZ) composites had nontoxic properties as evidenced through cell viability, growth and morphology studies. The thermal expansion of the GF/PBZ composite was similar to that of dentin, promoting adaptation at the dentin‐post interface. Mechanical behaviors evaluated by FEA of tooth model restored with GF/PBZ composite post were similar to those restored with commercial glass fiber post. The biocompatible GF/PBZ composite with good thermal and mechanical properties is a promising new candidate material as dental fiber post.

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Development and characterization of biological bovine dentin posts

Cited by 4 publications

References 60 publications

Resistance to fracture of intraradicular posts made of biological materials

Resistance to fracture of intraradicular posts made of biological materials

Evaluation of Different Post and Core Systems for Restoring Pulpectomized Primary Incisors: An In-Vitro Study

Biocompatibility, thermal and mechanical properties of glass fiber‐reinforced polybenzoxazine composites as a potential new endodontic post

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