Subtopic Deep Dive
Dental Resin Composites
Research Guide
What is Dental Resin Composites?
Dental resin composites are polymer-based restorative materials reinforced with fillers, used for direct tooth fillings due to their esthetics, adhesion, and mechanical properties.
They consist of monomer systems like Bis-GMA and TEGDMA with silica fillers for strength and polishability (Ferracane, 2010; 2049 citations). Key aspects include polymerization shrinkage stress, governed by configuration factor C (Feilzer et al., 1987; 1163 citations), and clinical longevity influenced by placement factors (Demarco et al., 2011; 985 citations). Over 10,000 papers explore their wear, bonding, and durability.
Why It Matters
Dental resin composites enable minimally invasive restorations, replacing amalgam in posterior teeth and supporting esthetic anterior work. Ferracane (2010) details their state-of-the-art composition driving 90% of direct restorations worldwide. Demarco et al. (2011) show 10-15 year survival rates exceeding 80% in posteriors when properly placed, reducing need for invasive crowns. Tjäderhane et al. (2015) link matrix metalloproteinases to hybrid layer degradation, informing adhesives that boost longevity by 20-30%.
Key Research Challenges
Polymerization Shrinkage Stress
Resin composites contract 2-5% during setting, generating stresses proportional to configuration factor C (Feilzer et al., 1987). High C-factors in cavities limit flow, causing debonding and microleakage. Mitigation via incremental layering or low-shrinkage monomers remains imperfect (Ferracane, 2010).
Long-term Clinical Durability
Posterior restorations fail via fracture or secondary caries after 5-10 years (Demarco et al., 2011). Wear resistance depends on filler loading, but oral stresses accelerate degradation. Operator technique often outweighs material advances.
Adhesive Interface Stability
Hybrid layers degrade via collagen hydrolysis by MMPs exposed in dentin (Tjäderhane et al., 2015). Contemporary adhesives vary widely in solvents and functional monomers (Van Landuyt et al., 2007). Durability under thermocycling challenges bonding to enamel and dentin.
Essential Papers
Matrix Metalloproteinases and Other Matrix Proteinases in Relation to Cariology: The Era of ‘Dentin Degradomics'
Leo Tjäderhane, Marília Afonso Rabelo Buzalaf, Marcela Carrilho et al. · 2015 · Caries Research · 2.3K citations
Dentin organic matrix, with type I collagen as the main component, is exposed after demineralization in dentinal caries, erosion or acidic conditioning during adhesive composite restorative treatme...
Resin composite—State of the art
Jack L. Ferracane · 2010 · Dental Materials · 2.0K citations
Systematic review of the chemical composition of contemporary dental adhesives
Kirsten Van Landuyt, J. Snauwaert, Jan De Munck et al. · 2007 · Biomaterials · 1.4K citations
Setting Stress in Composite Resin in Relation to Configuration of the Restoration
Albert J. Feilzer, A.J. de Gee, C.L. Davidson · 1987 · Journal of Dental Research · 1.2K citations
The setting stress in composite resins was studied as a function of restoration shape. The shape is described by the configuration factor, C, the ratio of the restoration's bonded to unbonded (free...
A review of dental CAD/CAM: current status and future perspectives from 20 years of experience
Takashi Miyazaki, Yasuhiro HOTTA, Jun Kunii et al. · 2009 · Dental Materials Journal · 1.0K citations
In this article, we review the recent history of the development of dental CAD/CAM systems for the fabrication of crowns and fixed partial dentures (FPDs), based on our 20 years of experience in th...
Calcium Phosphate Bioceramics: A Review of Their History, Structure, Properties, Coating Technologies and Biomedical Applications
Noam Eliaz, Noah Metoki · 2017 · Materials · 1.0K citations
Calcium phosphate (CaP) bioceramics are widely used in the field of bone regeneration, both in orthopedics and in dentistry, due to their good biocompatibility, osseointegration and osteoconduction...
Longevity of posterior composite restorations: Not only a matter of materials
Flávio Fernando Demarco, Marcos Britto Corrêa, Maximiliano Sérgio Cenci et al. · 2011 · Dental Materials · 985 citations
Reading Guide
Foundational Papers
Start with Ferracane (2010; 2049 citations) for composition overview; Feilzer et al. (1987; 1163 citations) for shrinkage mechanics; Van Landuyt et al. (2007; 1362 citations) for adhesives underpinning composites.
Recent Advances
Tjäderhane et al. (2015; 2307 citations) on MMP degradation; Demarco et al. (2011; 985 citations) on clinical longevity; Miyazaki et al. (2009; 1021 citations) for CAD/CAM integration.
Core Methods
Configuration factor C for stress (Feilzer); FTIR for degree of conversion; nanoindentation for modulus; survival analysis (Kaplan-Meier) for longevity (Demarco).
How PapersFlow Helps You Research Dental Resin Composites
Discover & Search
Research Agent uses searchPapers('dental resin composites polymerization shrinkage') to retrieve 500+ papers including Feilzer et al. (1987), then citationGraph to map influence on 2,000 descendants, and findSimilarPapers for low-shrinkage alternatives. exaSearch uncovers gray literature on clinical trials.
Analyze & Verify
Analysis Agent applies readPaperContent on Ferracane (2010) to extract monomer compositions, verifyResponse with CoVe against 10 citing papers for shrinkage claims, and runPythonAnalysis to plot configuration factor C vs. stress from Feilzer et al. (1987) data using NumPy. GRADE grading scores clinical evidence from Demarco et al. (2011) as moderate-quality.
Synthesize & Write
Synthesis Agent detects gaps in MMP inhibitor adhesives post-Tjäderhane et al. (2015), flags contradictions in longevity claims, and uses exportMermaid for polymerization stress flowcharts. Writing Agent employs latexEditText for methods sections, latexSyncCitations with 50-paper BibTeX, and latexCompile for camera-ready reviews.
Use Cases
"Analyze wear data from posterior composite trials"
Research Agent → searchPapers → Analysis Agent → runPythonAnalysis (pandas meta-analysis of Demarco et al. 2011 survival curves) → matplotlib survival plots exported as PNG.
"Draft review on resin composite monomers"
Synthesis Agent → gap detection (Peutzfeldt 1997) → Writing Agent → latexEditText (intro) → latexSyncCitations (20 papers) → latexCompile → PDF with figures.
"Find code for simulating composite stress"
Research Agent → paperExtractUrls (Ferracane 2010) → Code Discovery → paperFindGithubRepo → githubRepoInspect → runnable FEA script for C-factor modeling.
Automated Workflows
Deep Research workflow conducts systematic review: searchPapers(>50 hits on 'resin composites longevity') → DeepScan (7-step: extract, verify, GRADE) → structured report with evidence tables. Theorizer generates hypotheses on filler-matrix interactions from Ferracane (2010) + Miyazaki (2009) CAD/CAM data. DeepScan verifies shrinkage models against Feilzer et al. (1987) with CoVe checkpoints.
Frequently Asked Questions
What defines dental resin composites?
Polymer matrices (Bis-GMA/TEGDMA) with 50-80% inorganic fillers like silica for esthetics and strength (Ferracane, 2010).
What are main polymerization methods?
Light-cured via camphorquinone photoinitiators; dual-cured for bulk-fill. Shrinkage stress scales with C-factor (Feilzer et al., 1987).
What are key papers?
Ferracane (2010; 2049 citations) on state-of-the-art; Demarco et al. (2011; 985 citations) on posterior longevity; Tjäderhane et al. (2015; 2307 citations) on dentin degradomics.
What are open problems?
Reducing shrinkage below 1.5%; stabilizing hybrid layers against MMPs; matching zirconia bond strength for composites (Kern & Wegner, 1998).
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Part of the Dental materials and restorations Research Guide