Accepted for/Published in: JMIR Research Protocols
Date Submitted: Apr 27, 2025
Date Accepted: Jul 19, 2025
Warning: This is an author submission that is not peer-reviewed or edited. Preprints - unless they show as "accepted" - should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information.
Comparative evaluation of push out bond strength of Glass Fiber post and Carbon Fiber post in canals treated with Calcium Hydroxide based, Resin based and Bioceramic based root canal sealers- A Research Protocol
ABSTRACT
Background:
For root canal procedures to be successful, bond strength between endodontic sealer and post materials is necessary. For post-endodontic restorations, glass fibre post (GFP) and carbon fibre post (CFP) are frequently utilised. Depending on type of root canal sealer utilised, such posts may work differently. The chemical compositions and characteristics of sealers based on calcium hydroxide, resin, and bioceramics vary, which may have an impact on the posts' binding strength. Optimising rehabilitative results requires an understanding of these connections.
Objective:
To evaluate and compare push-out bond strength of Glass Fiber post and Carbon Fiber post in root canals treated with Calcium Hydroxide-based, Resin-based, and Bioceramic-based endodontic sealers.
Methods:
Sixty human removed mandibular incisors will be employed in this in vitro investigation. After the canals will be prepared, they will be separated into three groups according to the type of sealer that will be used: bioceramic, resin, and calcium hydroxide-based. The type of post (carbon fibre or glass fibre) will be used to further split each group into two subgroups. Universal testing machine will be used to exert a compressive force to each post in order to test push-out bond strength. Megapascals (MPa) will be used to record bond strength data, and ANOVA and post-hoc tests will be used.
Results:
Results are expected to demonstrate significant differences in push out bond strength between these different post with sealer combinations. Glass Fiber posts will be expected to have higher bond strength values than Carbon Fiber post in sealer groups, with highest bond strength observed in Bioceramic-based sealer group. Resin-based sealers are expected to show intermediate bond strengths, while Calcium Hydroxide-based sealers to show the lowest bond strength across both types of post.
Conclusions:
Glass Fiber post offer superior push-out bond strength in comparison to Carbon Fiber post, especially when used with Bioceramic-based sealers. Type of root canal sealer significantly affects bond strength, with Bioceramic-based sealers providing the most reliable bond. These findings suggest that careful selection of both post material and sealer type is necessary for enhancing long-term success of root canal restorations. Clinical Trial: Since this investigation will be conducted entirely as an in vitro study, registration with the Clinical Trials Registry - India (CTRI) was not applicable and therefore not required
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