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August 2, 2026BMC Oral HealthOpen Access

Marginal gap formation and fracture strength of indirect inlay restorations cemented with preheated resin composites: an in vitro study

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Authors

EIEngin IşıkEDEvrim Eligüzeloğlu Dalkılıç

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Overview

In vitro study evaluates gap formation and fracture strength in indirect restorations using preheated resins, suggesting alternative luting options.

Key Points

  • This study aims to evaluate the impact of preheated resin composites on gap formation and fracture strength in indirect inlay restorations compared to conventional resin cement.
  • Conducted an in vitro study with 40 human mandibular molar teeth distributed into four groups (n=10/group).
  • Used conventional dual-cure resin cement and two types of preheated resin composites in different groups, while one group served as intact control.
  • Performed thermal cycling and chewing simulations, with gap analysis using micro-CT and strength testing using a universal testing machine.
  • Significantly higher enamel margin gap volumes were found in the preheated bulk-fill composite group compared to the conventional resin cement group (p=0.012).
  • All restored groups exhibited significantly lower fracture strength values compared to the intact teeth group (p=0.003).
  • Fracture modes showed more repairable fractures in the preheated bulk-fill group and more irreparable fractures in the conventional group.

Cite This Study

Işık et al. (2026) studied this question.

synapsesocial.com/papers/6a6eeb201b0468a7eeab4121https://doi.org/10.1186/s12903-026-09466-1
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Can preheated resin composite optimize bond strength and film thickness for indirect adhesive restorations?2026
  2. 2Use of pre-heated resin for luting of indirect prosthesis: an in vitro study2024
  3. 3Fracture resistance, marginal integrity, and microleakage of indirect composite and computer-aided designed–computer-aided manufactured ceramic inlays in Class II MOD cavities: An in vitro study2026
  4. 4Effect of deep marginal elevation with different intermediate materials on the fracture resistance of direct and indirect final composite restorations: an in vitro study2026
  5. 5Preheated Composite for Prosthetic Cementation to Enamel and Dentin: A Scoping Review2026 · 2 citations