Comparative evaluation of microshear bond strength of the caries-affected dentinal surface treated with conventional method and chemomechanical method (papain)

Chittem, Jyothi; Sajjan, Girija S; Varma, K Madhu

doi:10.4103/0972-0707.164034

Cited by 8 publications

(9 citation statements)

References 21 publications

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“…The results were explained depending on the quality of adhesive bond at interfaces and failure pattern, as well. 25 In this study, groups (1&2) recorded the highest push-out bond strength among all groups. The main explanation was directed towards the minimal polymerization shrinkage of bulk-fill composite coupled by polymerization stress relieving properties.…”

Section: Discussionmentioning

confidence: 54%

Effect of intra-radicular rehabilitation techniques on push-out bond strength of fiber-reinforced posts in extremely flared canals

Assar

Roqaia²

2019

Egyptian Dental Journal

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Statement of the problem: Which technique should be followed to restore excessively flared canals, augmentation of intra-radicular dentin or customization of fiber post? The question asked by many practitioners. Purpose: To compare the effect of different intra-radicular rehabilitation techniques on pushout bond strength of fiber posts in extremely flared canals. Materials and Methods: Eighteen freshly extracted human maxillary central incisors roots were endodontically treated and embedded in acrylic blocks. The root canals were excessively flared and divided into six groups according to the technique of intra-radicular rehabilitation; Gr1: Augmentation of intra-radicular dentin by bulk-fill packable composite then cementation of Glassix plus post, Gr2: Augmentation of intra-radicular dentin by bulk-fill packable composite and direct use of Glassix plus post, Gr3: Augmentation of intra-radicular dentin by flowable composite then cementation of Glassix plus post, Gr4: Augmentation of intra-radicular dentin by flowable composite and direct use of Glassix plus post, Gr5: Customization of Glassix plus post by bulk-fill packable composite then cementation of the customized post, and Gr6: Customization of Glassix plus post by bulk-fill packable composite with simultaneous cementation. The roots were sectioned, thermocycled and the specimens were subjected to push-out test in universal testing machine. The maximum failure load was recorded and used to calculate the push-out bond strength. Data was statistically analyzed and failure mode was assessed using magnifying lens. Results: The highest mean value was recorded in Gr1, followed by Gr2, then Gr4, Gr3, Gr5, with the lowest mean recorded in Gr6. ANOVA test revealed the difference was statistically significant (p=0.0028). Tukey post hoc test revealed no significant difference between groups 1,2,3,4. Gr3 and Gr4 were not significantly different from all other groups. Conclusions: 1) Higher bond strengths are achievable with augmentation of excessively flared canals compared to customization of prefabricated fiber posts, 2) Augmentation of intra-radicular dentin is highly recommended by bulk-fill packable composite rather than flowable composite, (2568) Roqaia Mohammad Al Assar E.D.J. Vol. 65, No. 3 3) Cementation of light-transmitting post is an important step after augmentation of root dentin by bulk-fill composite, and 4) Use of light-transmitting post in conjunction with bulk-fill composite exhibits synergetic effect in curing depth manifested by high bond strengths. However, the use of one step-single curing method is not recommended. Clinical Significance: For extremely flared canals, it is advisable to use bulk-fill packable composite for augmentation of root dentin, followed by adhesive cementation of light-transmitting post. Always remember that augmentation of intra-radicular dentin is much better than customization of fiber post.

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Section: Discussionmentioning

confidence: 54%

Effect of intra-radicular rehabilitation techniques on push-out bond strength of fiber-reinforced posts in extremely flared canals

Assar

Roqaia²

2019

Egyptian Dental Journal

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“…The completeness of the caries removal was assessed by using the same criteria as for the first group. 3 …”

Section: Methodsmentioning

confidence: 99%

A comparative evaluation of micro shear bond strength and microleakage between the resin-modified glass ionomer cement and residual dentin following excavation of carious dentin using Carie CareTM and conventional caries removal in primary teeth: an in vitro study

et al. 2023

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Background: The bond between the dentin and restorative material contributes to the success of the restoration. Structural changes associated with prepared dentin may influence the bonding of restorative materials. The present study evaluates the bond between the resin-modified glass ionomer cement (RMGIC) and residual dentin following excavation of carious dentin using Carie CareTM and conventional caries removal in primary teeth. Methods: 52 primary teeth with dentinal caries were randomly grouped into group I, where caries removal was done using the conventional method, and group II which used Carie CareTM. All the teeth were restored using RMGIC. Micro shear bond strength between the residual dentin and the cement was tested using universal testing machine and the dye penetration method was used for microleakage testing. Independent t-test was performed for intergroup comparison. Pearson chi-square test was carried out to evaluate the microleakage patterns in the enamel and dentin. Results: The mean micro-shear bond strength of group I was 6.03±1.6 and that of group II was 8.54±2.92; this difference was statistically significant with a p-value of 0.012. Microleakage was higher in the test group (1.38±0.51) than the control group (0.77±0.6) and was significant with a p-value of .036. Conclusions: Papain-based chemomechanical agent Carie CareTM can be used as an alternative method to conventional caries removal. However, further studies need to explore methods to improve the marginal sealing capacity of RMGIC to the residual dentin after chemomechanical caries removal.

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“…Jyothi et al studied the effects of Papacárie ® , a papain-based enzymatic gel, on the caries-affected dentin of permanent molars (Chittem et al, 2015). They reported that a regular and cracked surface could be observed on caries-affected dentin with a small smear layer and exposed dentinal tubules.…”

Section: Papain-based Enzymatic Gel Groupmentioning

confidence: 99%

Examination of caries‐affected dentin and composite‐resin interface after different caries removal methods: A scanning electron microscope study

Donmez

Kazak

Kaynar

et al. 2022

Microscopy Res & Technique

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To evaluate the caries-affected dentin and composite-resin interface with scanning electron microscopy (SEM) after different caries removal methods in human molars.Twelve with extensive approximal caries lesions that did not reach the pulp and five caries-free molars (control group [CG]) were used. Carious teeth were divided into four experimental groups: Atraumatic Restorative Treatment (ART), Rotary Instrument (RI), Photo-Ablation, and Papain-Based Enzymatic Gel (Brix 3000 ® , Brix, Brazil).Class II slot cavities were prepared with RI in the CG. Then all caries removed teeth and control groups were restored (All-Bond Universal, BISCO, USA; Clearfil MajestyES-2, Kuraray, Japan). Specimens were prepared for SEM examinations.Hybrid layer (HL) thicknesses were measured using ImageJ programme. Gap measurements were performed with micro-CT. Data were analyzed with ANOVA and posthoc Dunnett's t-tests (p < .05). The highest HL thickness was found in Photo-Ablation Group, and a statistically significant difference was observed among the control and experimental groups (p < .05). The lowest HL thickness was measured in the Enzymatic Gel Group. In terms of internal gap formation, CG showed statistically significant differences compared to the other groups (p < .05). The highest internal gap was observed in RI Group, while the lowest gap was observed in CG. According to SEM, a uniform HL and resin tags were seen in the CG. Smear layer, irregular HL, and gap formation were observed in ART Group. In RI Group, nonuniform HL formation and resin tags were observed. In Photo-Ablation Group, a uniform HL without smear layer and internal gap was observed. In the Enzymatic Gel Group, both opened dentinal tubules, and melting-like formations were observed on the dentin surface.Especially melting-like formations were observed in peritubular dentin. It can be concluded that all caries removal methods except rotary instrumentation were conservative methods, which preserve more healthy dental tissues. Research highlightsAmong the caries removal procedures, the photo-ablation caries removal method stands out with the highest hybrid layer (HL) thickness and the lowest internal gap formation. Despite having the lowest HL thickness, the enzymatic gel method can be

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Comparative evaluation of microshear bond strength of the caries-affected dentinal surface treated with conventional method and chemomechanical method (papain)

Cited by 8 publications

References 21 publications

Effect of intra-radicular rehabilitation techniques on push-out bond strength of fiber-reinforced posts in extremely flared canals

Effect of intra-radicular rehabilitation techniques on push-out bond strength of fiber-reinforced posts in extremely flared canals

A comparative evaluation of micro shear bond strength and microleakage between the resin-modified glass ionomer cement and residual dentin following excavation of carious dentin using Carie CareTM and conventional caries removal in primary teeth: an in vitro study

Examination of caries‐affected dentin and composite‐resin interface after different caries removal methods: A scanning electron microscope study

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