Therafil-21: Dual-Component Chemical Composite for Bulk Restorations

Therafil-21 is a highly effective, dual-component chemical-curing composite (paste-paste system) specifically designed for clinical situations demanding exceptional strength and guaranteed polymerization at great depth. This material is the ideal choice for clinicians who require complete control over working time and independence from the light curing unit's power.

Thanks to its high filler load and optimized chemical matrix, Therafil-21 provides a reliable restoration that is resistant to high occlusal loads.

Key Properties and Technological Advantages

• Complete Chemical Curing: The composite polymerizes without the use of light, guaranteeing 100% conversion at any depth and in hard-to-reach areas (e.g., in root canals or deep areas of Class II cavities). This completely eliminates the problem of incomplete polymerization common with light-curing materials in thick layers.

• High Mechanical Resistance: Therafil-21 demonstrates outstanding compressive, flexural, and wear resistance. This makes it an ideal material for primary load-bearing structures, such as core build-ups and bulk posterior restorations.

• Minimal Polymerization Shrinkage: The chemical curing system exhibits lower shrinkage compared to light-curing composites. This contributes to better marginal adaptation and reduces the risk of micro-gaps and postoperative sensitivity.

• Convenient "Paste-Paste" System: The material is supplied in two tubes (Base 15 g + Catalyst 15 g), which are easily mixed in equal proportions. This allows for precise control over the start of the procedure and provides sufficient working time for modeling large restorations.

• Radiopacity: High radiopacity ensures clear visualization of the material on radiographs, simplifying post-operative diagnostics and quality control of the fit.

Indications for Use

Therafil-21 is a versatile material for bulk and complex restorations:

• Core Build-ups: Creation of a strong and stable foundation for subsequent placement of crowns, veneers, and other indirect restorations.

• Restoration of Large Cavities: Application in large Class I and II cavities where complete deep curing is essential.

• Post Cementation: Used for the reliable fixation of intra-radicular posts (metal or fiberglass) in conjunction with appropriate adhesive systems.

• In-office Restorations: Used for modeling indirect inlays and onlays in a clinical setting (in a single appointment, e.g., using CAD/CAM technology).

Working and Curing Protocol

For maximum adhesion, Therafil-21 is used with 4th or 5th generation adhesive systems (Total-Etch technique) or universal bonds.

• Mixing: Mix equal amounts of the base paste and catalyst paste until a homogeneous color is achieved (approximately 30-45 seconds).

• Application: Dispense the material into the cavity or around the post.

• Curing Time: The material has a comfortable working time (usually 1-2 minutes) and fully cures in the oral cavity within 3-5 minutes (depending on temperature).

• Finishing: After full curing, the material is easily finished and polished with standard instruments.