Fracture Resistance of Teeth Submitted to Several Internal Bleaching Protocols

Leonardo, Renato de Toledo; Kuga, Milton Carlos; Guiotti, Flávia Angélica; Andolfatto, Carolina; Faria-Júnior, Norberto Batista de; Campos, Edson Alves de; Keine, Kátia Cristina; Dantas, Andréa Abi Rached

doi:10.5005/jp-journals-10024-1512

Cited by 11 publications

(6 citation statements)

References 24 publications

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“…Walking bleach procedure cause more reduction in fracture resistance of teeth due to the residues of bleaching agents that remains within the dentinal tubules, and continuous mechanical and thermal alterations that can occur intra-orally. Our study results are in line with those of Leonardo Rde et al [ 18 ]. They evaluated the fracture resistance of teeth subjected to several internal bleaching protocols using 35% hydrogen peroxide, 37% carbamide peroxide, and 15% hydrogen peroxide with titanium dioxide nanoparticles photoactivated by LED-laser or sodium perborate.…”

Section: Discussionsupporting

confidence: 94%

Evaluating the Effect of Different Intra-Orifice Barriers and Various Bleaching Agents on the Fracture Resistance of Teeth After the Walking Bleach Procedure: An In Vitro Study

D¹,

Gupta²,

Rana³

et al. 2023

Cureus

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Objective This study aimed to evaluate the effect of three different commercially available intra-orifice barriers and bleaching agents on root canal-treated teeth. Materials and methods Forty-five freshly extracted single-rooted incisors, canine, and premolars were collected and stored in 10% formalin. Root canal procedures were performed on the extracted teeth and these were classified into three groups and three subgroups (n=5). Group 1: resin-modified glass ionomer cement (RMGIC); placed at the level of cemento-enamel junction (CEJ) and cured for 20 seconds. Group 2: Biodentin TM (Septodont Ltd., Saint Maur des Fausse´s, France); powder and liquid were mixed according to the manufacturer's instructions and placed at the level of CEJ, and waited for 15 minutes to set. Group 3: bulk-fill composite; placed at the level of CEJ. Group A was treated with 35% carbamide peroxide (Ultradent Opalescence 35% PF regular). Group B was bleached with 35% hydrogen peroxide (Pola Office). Group C, which was the control group, was treated with distilled water. The bleaching procedure was repeated once every seven days for a period of three weeks. After bleaching, every sample was sectioned 2 mm above the level of CEJ to remove the crown. Auniversal testing machine (UTM) was used for the evaluation of the fracture resistance of teeth. Data were analyzed for significance by using analysis of variance (ANOVA) and further pair-wise comparison was performed by pos-hoc analysis. The level of significance was set at p<0.05 Results There was a significant difference between the fracture resistance of the three materials when bleached using distilled water (p<0.05). The fracture resistance of Group 3 was significantly greater than that of Group 2 and Group 1 (p<0.05). The difference in the fracture resistance between Group 1 and Group 2 was nonsignificant (p>0.05). Conclusion Walking bleach performed via bleaching agents 35% carbamide peroxide and 35% hydrogen peroxide leads to a reduction in the fracture resistance of endodontically treated teeth; 35% hydrogen peroxide causes more fracture resistance reduction than carbamide peroxide of the same concentration. The presence of intra-orifice barriers leads to greater fracture resistance and reinforcement of endodontically treated teeth that undergo the walking bleach procedure. Bulk-fill composite can be used as an intra-orifice barrier with good fracture resistance.

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Section: Discussionsupporting

confidence: 94%

Evaluating the Effect of Different Intra-Orifice Barriers and Various Bleaching Agents on the Fracture Resistance of Teeth After the Walking Bleach Procedure: An In Vitro Study

D¹,

Gupta²,

Rana³

et al. 2023

Cureus

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“…30,31 In the fracture resistance assessment, a force was applied with an angle of incidence of 135° relative to the long axis of the root to simulate natural conditions. 2,11 Praddep et al 32 have observed that the fracture resistance of teeth bleached with peroxides is similar to that of sound teeth when an axial force is applied. However, this angle of incidence is not consistent with clinical conditions for upper incisors.…”

Section: Discussionmentioning

confidence: 98%

“…Subsequently, the gel was aspirated; the dental crown was then copiously rinsed with a gentle spray of water for 1 min, dried and immediately restored in a manner similar to the treatment used for G2. 2 For G4 (HP + SA + CR), after a bleaching protocol similar to that used for G3 was used, 10% sodium ascorbate gel (Apothicário, Araçatuba, Brazil) was applied to the buccal surface for 15 min and within the pulp chamber for 10 minutes. Subsequently, the tooth was rinsed with a gentle spray of water for 15 s and then immediately restored with a procedure similar to that used for G2.…”

Section: Methodsmentioning

confidence: 99%

“…1 At times, clinical strategies require tooth bleaching followed by restoration with composite resin during a single session. 2 Hydrogen peroxide is a bleaching agent used at concentrations ranging from 5% to 40%. Higher concentrations are caustic, aggressively affect oral tissues, release free radicals and deleteriously affect dental structure.…”

Section: Introductionmentioning

confidence: 99%

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Effects of alpha-tocopherol on fracture resistance after endodontic treatment, bleaching and restoration

et al. 2016

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This study evaluated the effects of 10% alphatocopherol on the fracture resistance of endodontically treated teeth subjected to tooth bleaching with hydrogen peroxide and immediately restored with composite resin. Fifty bovine incisors were selected, including 10 sound teeth that constituted the control group (G1 (C)). The remaining 40 teeth, which were endodontically treated, were divided into four groups (n = 10): G2 (CR), consisting of teeth immediately restored with composite resin; G3 (HP + CR), consisting of teeth subjected to tooth bleaching with 38% hydrogen peroxide and immediately restored with composite resin; G4 (HP + SA + CR), which received treatment similar to that used for G3, but with 10% sodium ascorbate gel applied after the bleaching protocol; and G5 (HP + AT + CR), which was similar to G4 but included 10% alphatocopherol gel as an antioxidant. After 24 h, composite restorations were performed, and teeth were subjected to a fracture resistance test at a speed of 0.5 mm/min in an electromechanical testing machine. The axial force was applied with an angle of incidence of 135° relative to the long axis of the root. Data were subjected to ANOVA and Tukey tests (p = 0.05). G1 exhibited the highest fracture resistance (p < 0.05). No significant differences among the other experimental groups were observed. The 10% sodium ascorbate and 10% alphatocopherol gels did not improve the fracture resistance of endodontically treated teeth subjected to bleaching with 38% hydrogen peroxide.

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“…The penetration is significantly higher with sodium perborate-hydrogen peroxide mixtures than with mixtures of sodium perborate tetrahydrate and water. Several studies have demonstrated that sodium perborate with water is an effective and safe bleaching agent [13, 17–19]. …”

Section: Discussionmentioning

confidence: 99%

Ten-Year Follow-Up of a Fragment Reattachment to an Anterior Tooth: A Conservative Approach

Mendes

Laxe

Passos

2017

Case Reports in Dentistry

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This report describes the 10-year follow-up data of a patient who underwent fragment reattachment to the maxillary central incisor after coronal fracture with pulp exposure as well as the procedures followed for functional and esthetic adjustments. A 9-year-old female patient presented at the clinic of dentistry at the State University of Rio de Janeiro with a coronal fracture and pulp exposure of the right maxillary central incisor that had occurred immediately after an accident. The intact tooth fragment was recovered at the accident site and stored in milk. The treatment plan followed was to perform direct pulp capping and tooth fragment reattachment. When the patient was 14 years old, adhesion between fragment and remaining tooth was lost, and fragment reattachment was performed. Five years later, the same tooth presented clinical discoloration and absence of sensitivity during pulp vitality tests. Subsequently, a new treatment plan was formulated, which included endodontic treatment, followed by nonvital tooth bleaching and light-cured composite resin restoration. An esthetic and natural-looking restoration was achieved. Tooth fragment reattachment is not a temporary restorative technique and requires functional and esthetic adjustments over time to maintain the biomimetic characteristics of traumatized anterior teeth and predictable outcomes.

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Fracture Resistance of Teeth Submitted to Several Internal Bleaching Protocols

Cited by 11 publications

References 24 publications

Evaluating the Effect of Different Intra-Orifice Barriers and Various Bleaching Agents on the Fracture Resistance of Teeth After the Walking Bleach Procedure: An In Vitro Study

Evaluating the Effect of Different Intra-Orifice Barriers and Various Bleaching Agents on the Fracture Resistance of Teeth After the Walking Bleach Procedure: An In Vitro Study

Effects of alpha-tocopherol on fracture resistance after endodontic treatment, bleaching and restoration

Ten-Year Follow-Up of a Fragment Reattachment to an Anterior Tooth: A Conservative Approach

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