Comparison of the microleakage between two different flowable composite resin restorations with 8th generation bond system in Class II cavity - An in vitro stereomicroscopic study.
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2020-12-31 |
| Journal | University Journal of Dental Sciences |
| Authors | Kaushal Kishor Singh, Amit Garg, Rajnish K Singhal, Anurag Jain, Neha Agarawal |
| Institutions | Aligarh Muslim University, Maharana Pratap University of Agriculture and Technology |
| Analysis | Full AI Review Included |
Technical Documentation & Analysis: High-Precision Diamond Requirements in Dental Material Science
Section titled âTechnical Documentation & Analysis: High-Precision Diamond Requirements in Dental Material ScienceâExecutive Summary
Section titled âExecutive SummaryâThis research paper, focusing on the marginal adaptation of flowable composite resins in Class II cavities, highlights the critical role of high-precision material science and diamond tooling in dental research and quality control.
- Core Finding: Restorations using SDR (Smart Dentin Replacement) flowable composite demonstrated minimum microleakage (Mean score 0.4 ± 0.83) compared to Tetric Evo Flow Bulk Fill.
- Critical Methodology: The study relied on rigorous artificial aging via thermocycling (1500 cycles between 5°C and 55°C) to simulate long-term thermal stress.
- Diamond Tooling Requirement: Accurate analysis required precise sectioning using an Isomet diamond saw and standardized cavity preparation using a straight fissure diamond bur (No.012).
- 6CCVD Value Proposition: 6CCVD specializes in providing the foundational MPCVD diamond materials (SCD and PCD) necessary for manufacturing these ultra-hard, high-tolerance cutting tools and wear-resistant components.
- Thermal Stability: Diamondâs superior thermal properties are essential for maintaining calibration and stability in the demanding thermocycling equipment used for artificial aging studies.
- Sales Focus: We offer custom diamond substrates that ensure the highest level of precision and durability for advanced dental material testing and tool manufacturing.
Technical Specifications
Section titled âTechnical SpecificationsâThe following hard data points extracted from the methodology demonstrate the demanding physical parameters required for this type of material testing:
| Parameter | Value | Unit | Context |
|---|---|---|---|
| Thermocycling Range (Low) | 5 ± 2 | °C | Cold bath temperature |
| Thermocycling Range (High) | 55 ± 2 | °C | Hot bath temperature |
| Total Thermocycling Cycles | 1500 | Cycles | Artificial aging duration |
| Dwell Time per Cycle | 30 | seconds | Time spent at temperature extreme |
| Transfer Time | 15 | seconds | Time taken to move between baths |
| Cavity Buccolingual Width | 4 | mm | Standardized preparation dimension |
| Cavity Pulpal Depth | 2 | mm | Standardized preparation dimension |
| Dye Penetration Analysis | 25 | X | Stereomicroscope magnification |
| Minimum Microleakage Score (SDR, Group Ia) | 0.4 ± 0.83 | Score | Best marginal adaptation result |
| Highest Microleakage Score (Tetric Evo Flow, Group IIa) | 0.75 ± 1.118 | Score | Worst marginal adaptation result |
Key Methodologies
Section titled âKey MethodologiesâThe experimental design required strict control over material preparation and thermal stress, necessitating high-quality diamond components for precision and durability:
- Cavity Preparation: Class II box type cavities were prepared using a new straight fissure diamond bur (No.012, Mani, Tochigi, Japan) and a high-speed air rotor.
- Restoration & Curing: Teeth were restored using either SDR or Tetric Evo Flow Bulk Fill, applied with Futurabond DC (8th generation system), followed by light curing (10 to 20 seconds).
- Artificial Aging: Specimens were subjected to thermocycling (1500 cycles) between 5°C ± 2°C and 55°C ± 2°C, simulating long-term thermal expansion and contraction stresses.
- Dye Penetration: Teeth were immersed in 2% methylene blue dye for 24 hours to reveal marginal leakage pathways.
- Sectioning: Samples were cut longitudinally through the center of the restorations using an Isomet diamond saw (Diamond disk and Mandrel, DFS Diamon).
- Analysis: Dye penetration depth was scored under a stereomicroscope (25X magnification).
6CCVD Solutions & Capabilities
Section titled â6CCVD Solutions & CapabilitiesâThe successful replication and extension of this researchâparticularly the reliance on high-precision cutting and rigorous thermal testingârequires advanced diamond materials. 6CCVD is uniquely positioned to supply the necessary MPCVD diamond substrates for tool manufacturers and research facilities.
| Research Requirement | 6CCVD Solution & Capability | Applicable Materials & Specifications |
|---|---|---|
| Ultra-Hard Cutting Edges (Diamond Burs, Isomet Saws) | Supply of high-purity diamond substrates for manufacturing durable, high-tolerance cutting tools essential for precise sectioning of hard dental materials. | Polycrystalline Diamond (PCD): Plates up to 125mm for large grinding wheels and saw blades. |
| High-Precision Micro-Tools (Micro-machining, fine burs) | SCD provides superior uniformity and hardness for micro-scale tooling used in delicate preparation or analysis. | Single Crystal Diamond (SCD): Thicknesses from 0.1”m to 500”m. |
| Thermal Management & Stability (Thermocycling Equipment) | Diamondâs exceptional thermal conductivity ensures stable temperature control and rapid heat dissipation in advanced testing apparatus. | SCD Thermal Grade: High purity material for heat sinks and thermal spreaders. |
| Custom Tool Dimensions | We provide custom-sized diamond wafers and plates tailored to specific tool geometries (e.g., specialized burs or saw mandrels). | Custom Dimensions: Plates/wafers up to 125mm (PCD), Substrates up to 10mm thickness. |
| Surface Finish for Tool Longevity | Ultra-smooth polishing services reduce friction and wear on diamond tool surfaces, extending the life and precision of cutting instruments. | Polishing: Ra < 1nm (SCD), Ra < 5nm (Inch-size PCD). |
| Metalization for Bonding | Internal capability to metalize diamond surfaces, facilitating secure bonding of diamond cutting elements to tool shanks or mandrels (e.g., Ti/Pt/Au layers). | Metalization: Au, Pt, Pd, Ti, W, Cu (Internal capability). |
Engineering Support
Section titled âEngineering Supportâ6CCVDâs in-house PhD team can assist tool manufacturers and research labs in selecting the optimal diamond grade (SCD vs. PCD) based on required hardness, wear resistance, and thermal stability for similar high-precision cutting and material testing projects. We offer consultation on material properties, custom dimensions, and metalization schemes to optimize performance in demanding dental and biomedical applications.
For custom specifications or material consultation, visit 6ccvd.com or contact our engineering team directly. Global shipping is available (DDU default, DDP available).
View Original Abstract
Introduction Marginal adaptability of composite resins is one of the prime factors for the success of class II cavity restoration. Materials and Methodology: Forty non-carious extracted mandibular molar with fully formed apices were collected and Class II box type cavities were prepared on both mesial and distal surfaces of every tooth using a new straight fissure diamond bur and high-speed airrotor handpiece. According to the type of restorative materials used, teeth were divided into Group I (n=20): Restored with SDR (Smart Dentin Replacement) and Group II (n=20): Restored with Tetric Eva Flow Bulk Fill. After 24 hours of storage in distilled water at 37ËC, the restored specimens were subjected to artificial aging by thermocycling. The teeth were then immersed in a 2% methylene blue dye for 24 hours. All samples were cut longitudinally through the center of the restorations with the help of an isomet diamond saw. The sections were then observed under a stereomicroscope at 25X for scoring the depth of dye penetration at cervical and axial walls toward the pulp. Results: Mean score of Group Ia is 0.4±0.83 and Ib was 0.55±0.88 respectively while the mean score of Group IIa was 0.75±1.118 and in IIb was 0.75±1.019 respectively. Microleakage was found to be highest in Group IIa and minimum in Group Ia. Conclusion: Use of a flowable composite SDR above and below the CEJ in Class II composite resin restorations showed good results.