Related Experiment Video
Updated: May 17, 2025
08:40
Standard Test Method ASTM D 7998-19 for the Cohesive Strength Development of Wood Adhesives
Published on: May 17, 2020
2.8K
Adhesive strength in cementing fiberglass posts using different adhesive systems.
Guilherme Do Amaral1, Karina Andrea Novaes Olivieri1, Rafael Pino Vitti2
1Faculdade São Leopoldo Mandic.
Journal of Clinical and Experimental Dentistry
|May 16, 2025
Summary
Scotchbond MP adhesive resulted in higher bond strength between fiberglass posts and root canals compared to Clearfil SE. This study highlights adhesive choice impact on dental restoration durability.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
Background:
- Dental restorations increasingly utilize fiberglass posts for enhanced aesthetics and mechanical properties.
- Ensuring durable adhesion between posts, resin cement, and root dentin is critical for long-term restoration success.
Purpose of the Study:
- To compare the bond strength of two adhesive systems, Scotchbond MP (SCB) and Clearfil SE (CFL), in bonding fiberglass posts to root canals.
- To evaluate the influence of these adhesive systems on the push-out bond strength between the post and the root canal dentin.
Main Methods:
- An in vitro study using 20 human canine teeth with specific inclusion criteria.
- Fiberglass posts were cemented using Scotchbond MP or Clearfil SE adhesive systems with RelyX ARC cement.
- Push-out bond strength was measured using a Universal Testing Machine, with statistical analysis employing Tukey's test.
Main Results:
- The Scotchbond MP (SCB) adhesive system demonstrated higher bond strength values (RU) compared to the Clearfil SE (CFL) system.
- No statistically significant interaction was found between the adhesive systems and other factors studied.
Conclusions:
- Scotchbond MP adhesive provides superior bond strength between resin cement and root dentin when used with fiberglass posts.
- The tested adhesive systems did not show significant differences in bond strength across different root portions.
Related Concept Videos
01:20Strength of Cement
115
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
115
01:12Bonding and Strength of Aggregate
123
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
123
01:17Mortar Properties
99
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
99
01:22Types of Cement II
85
Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
85
01:22Fiber Reinforced Concrete
61
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
61
01:21Types of Cement I
89
Portland cement comes in several types, each with distinct properties and applications based on their chemical composition and hydration characteristics:
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
89