Product overview and indications
relyx unicem instructions: a self‑adhesive universal resin cement designed for bonding ceramic‚ composite. It offers simplified workflow‚ reliable bond strength‚ and is indicated for crowns‚ bridges‚ veneers.and inlays. inlays
Types of RelyX Unicem cements
relyx unicem instructions: RelyX Unicem offers several formulations tailored to specific restorative needs. The primary line includes RelyX Unicem 2 Automix‚ a self‑adhesive resin cement that eliminates separate bonding agents‚ providing a two‑step workflow for metal‑ceramic‚ zirconia‚ and high‑strength ceramics. A second variant‚ RelyX Unicem 2 Universal‚ expands compatibility to all ceramic types‚ including lithium disilicate and zirconia‚ while maintaining the self‑adhesive property. For clinicians requiring a higher degree of control‚ RelyX Unicem 2 Self‑Adhesive Resin Cement (SARC) can be used with a separate primer for enhanced bond strength to glass‑ceramics. Finally‚ RelyX Unicem 2 Automix is available in a ready‑to‑use cartridge that mixes upon dispensing‚ simplifying chairside preparation. Each formulation follows the same core chemistry but differs in viscosity‚ setting time‚ and recommended pretreatment protocols‚ allowing the practitioner to select the optimal cement based on the restoration material‚ clinical scenario‚ and desired handling characteristics. It is compatible with both conventional and CAD/CAM workflows‚ offering handling great!
RelyX Unicem 2 Automix – Self‑adhesive resin cement
relyx unicem instructions: RelyX Unicem 2 Automix is a self‑adhesive resin cement providing a simplified two‑step workflow‚ ideal for zirconia‚ lithium disilicate‚ and metal‑ceramic restorations. Ideal for durable‚ aesthetic s.
Surface preparation protocols
relyx unicem instructions: For optimal adhesion with RelyX Unicem 2 Automix‚ begin by cleaning the tooth surface with a rubber cup and pumice‚ then rinse and dry. For zirconia‚ sandblast with 30–50 µm Al2O3 at 2 bar for 10 s‚ rinse‚ and air‑dry. For glass‑ceramic‚ etch with 9–10 % HF acid for 20 s‚ rinse‚ and apply silane (e.g.‚ 3M RelyX Ceramic Primer) for 60 s. For composite or metal‑ceramic‚ use a universal primer if recommended. After pretreatment‚ wipe the surface with isopropyl alcohol to remove contaminants and allow the surface to dry completely before mixing the cement. The cement is mixed in a 1:1 ratio of powder and liquid‚ stirred for 20 s‚ and applied with a disposable syringe or applicator tip. Seat the restoration‚ remove excess cement with a rubber cup‚ and light‑curing is performed for 20 s from multiple angles to ensure complete polymerization. Follow the manufacturer’s storage guidelines: keep the kit sealed‚ store at 2–8 °C‚ and use within the indicated shelf life. Proper surface preparation ensures a strong‚ durable bond and minimizes postoperative sensitivity. Carefully. follow.! ok
Sandblasting and cleaning for zirconia
relyx unicem instructions: Sandblast zirconia with 30–50 µm Al₂O₃ at 2 bar for 10 s‚ rinse‚ dry‚ then clean with 70 % isopropyl alcohol. Ensure a matte surface before cementation. Apply primer for 60 s‚ cure 20 s on surfacess.
Pretreatment of glass‑ceramic restorations
relyx unicem instructions: The pretreatment of glass‑ceramic restorations requires a precise protocol to maximize bond strength. First‚ etch the ceramic surface with 5 % hydrofluoric acid (HF) for 20 s. Rinse with copious water for at least 30 s‚ then dry with a gentle stream of air. Next‚ apply a silane coupling agent—3M RelyX Ceramic Primer is recommended. Spray or brush the primer onto the etched surface‚ ensuring full coverage. Allow the solvent to evaporate for 60 s before light‑curing for 20 s with a 3 W LED. This silanization step creates a chemical bridge between the ceramic and the resin cement. After silane‚ clean the surface again with 70 % isopropyl alcohol to remove any residual primer. Finally‚ apply RelyX Unicem 2 Automix directly to the restoration or tooth‚ following the manufacturer’s mixing and handling instructions. Adhering to this sequence yields a durable bond suitable for crowns‚ veneers‚ and inlays. Handle HF with gloves‚ goggles‚ and a fume hood‚ and dispose of waste per local regulations. No additional bonding agent is required when using RelyX Unicem 2 Automix‚ as it contains its own adhesive system. Use kit per protocol.
Hydrofluoric acid etching and silanization
relyx unicem instructions: etch glass‑ceramic with 5 % HF for 20 s‚ rinse‚ dry‚ then apply silane primer‚ let evaporate 60 s‚ cure 20 s. This sequence ensures optimal adhesion for crowns and veneers. Proper handling.!!
CAD/CAM restoration bonding considerations
relyx unicem instructions: For CAD/CAM restoration bonding‚ the cement offers a self‑adhesive approach that simplifies the workflow while maintaining bond strength. The key step is surface pretreatment of the block. Etchable glass‑ceramics such as IPS e.max CAD‚ Paradigm C Ceramic‚ 3M ESPE blocks‚ and Vita Mark II require hydrofluoric‑acid etching followed by silane application. Composite CAD/CAM blocks (Paradigm MZ100‚ 3M ESPE) are not etched; instead‚ a silane primer is applied directly after cleaning. After cleaning with alcohol‚ rinse‚ and dry‚ a 30‑second HF etch (5 % solution) creates micromechanical retention. Then apply a silane primer (e.g.‚ 3M RelyX Ceramic Primer) for 60 s‚ let the solvent evaporate‚ and light‑cure for 20 s. When bonding‚ mix the two components of RelyX Unicem 2 Automix‚ apply to the prepared surface‚ seat the restoration‚ and remove excess cement. The universal cement’s self‑adhesive chemistry eliminates the need for separate bonding agents‚ reducing chair‑side time. Proper storage of the cement (2 °C–25 °C‚ protected from light) ensures optimal polymerization. Directed.!!
Etching or silane application for CAD/CAM blocks
relyx unicem instructions: For glass‑ceramic CAD/CAM blocks‚ use 5 % HF acid for 20 s‚ rinse‚ dry‚ then apply silane primer for 60 s. Composite blocks skip etch; clean‚ silanize‚ then seat with RelyX Unicem 2 Automix.
Clinical workflow for crown cementation
relyx unicem instructions: The clinical workflow for crown cementation with RelyX Unicem 2 Automix follows a streamlined‚ self‑adhesive protocol that eliminates the need for separate bonding agents. Begin by preparing the tooth with a standardized finish line and ensuring the internal surface of the crown is clean and dry. Next‚ sandblast the internal surface of the restoration with 30 µm aluminum oxide at 2 bar pressure to create a matte texture‚ then rinse with water and dry with a lint‑free cloth. Apply the cement by mixing the powder and liquid components in a 1:1 ratio‚ allowing the mixture to flow into the internal cavity of the crown. Seat the crown‚ applying a firm‚ even pressure for 30 s to ensure full seating and to expel excess cement. After seating‚ remove any excess cement from the margin with a micro‑brush and a small amount of water. Finally‚ cure the cement with a dual‑mode light for 20 s‚ ensuring adequate polymerization. The result is a durable bond with minimal chair‑side time and high clinical reliability.
Key steps:
- Tooth preparation: finish line‚ isolation‚ moisture control.
- Restoration prep: sandblasting‚ rinse‚ dry.
- Cement mixing: 1:1 powder/liquid‚ stir until homogeneous.
- Application: fill internal cavity‚ seat crown‚ 30 s pressure.
- Cleanup: remove excess‚ rinse‚ dry margins.
- Curing: dual‑mode light 20 s‚ verify polymerization.
- Polishing: smooth margins‚ check occlusion.
Adhere to the manufacturer’s storage guidelines and use the cement within its shelf life to maintain optimal performance.
Follow safety precautions!
Step‑by‑step procedure from tooth prep to cementation
relyx unicem instructions: After tooth prep‚ isolate‚ sandblast restoration‚ mix cement 1:1‚ seat crown‚ press 30 s‚ remove excess‚ cure 20 s. Ensure dry margins‚ verify occlusion‚ polish. Follow guidelines for storage and handling
Removal and cleanup of excess cement
relyx unicem instructions: After seating the restoration‚ excess cement must be removed promptly to avoid staining and to ensure optimal marginal seal. Use a damp cotton pellet or a soft brush to gently wipe the surface‚ taking care not to dislodge the crown. A small amount of solvent (e.g.‚ acetone or a dedicated cement remover) can be applied to a cotton pellet for stubborn residues. The cement should be cleaned from the tooth surface‚ the restoration margins‚ and the occlusal table before final curing. Once the excess is removed‚ the restoration should be inspected under magnification to confirm a clean margin. If any cement remains‚ repeat the cleaning steps. Finally‚ apply a light‑curing light for 20 seconds to polymerize the cement fully. Proper cleanup reduces the risk of postoperative sensitivity and improves long‑term retention. Always follow the manufacturer’s safety guidelines when handling solvents and disposing of waste. The cement’s dual‑phase chemistry allows for a self‑etching surface interaction‚ providing a bond while the resin matrix infiltrates the restoration’s micro‑roughness‚ ensuring a durable‚ esthetically pleasing interface that resists microleakage over time.!
Recommended tools and techniques
relyx unicem instructions: Use a 0.5 mm diamond bur for fine adjustment‚ a rubber‑dam for isolation‚ a 10‑mm hand‑piece for gentle seating‚ and a 3‑mm brush for excess removal. Follow the manufacturer’s protocol for curing.!!
Common complications and troubleshooting
relyx unicem instructions: Common issues include insufficient bond strength‚ excess cement‚ and marginal leakage. Causes often stem from inadequate surface prep‚ contamination‚ or improper mixing. To resolve‚ ensure thorough sandblasting or HF etching‚ clean with alcohol‚ and apply silane per manufacturer’s protocol. Verify correct mixing ratio; over‑mixing can reduce viscosity‚ while under‑mixing may lead to weak bonds. Use a calibrated mixing device and mix for the recommended time. Excess cement should be removed with a micro‑brush before curing. If leakage occurs‚ re‑seat the restoration‚ re‑mix cement‚ and apply a thin layer of universal primer. For adhesion failures on zirconia‚ consider applying a 10% phosphoric acid etch followed by a zirconia primer. Monitor cure time and light intensity; insufficient curing can cause incomplete polymerization. Store the cement in a cool‚ dry place and avoid exposure to humidity. If the cement shows discoloration or loss of viscosity‚ discard and use a fresh vial. Follow the product’s shelf‑life guidelines and replace expired material. Proper isolation with a rubber dam and a clean‚ dry field are essential to prevent contamination. When in doubt‚ perform a pilot test on a non‑critical tooth or use a bonding agent specifically designed for the material in question. Adhering to these steps will minimize complications and enhance long‑term success.
Adhesion failures and solutions
relyx unicem instructions: adhesion failures often stem from contamination or improper mixing. Solution: clean surfaces‚ mix correctly‚ apply silane‚ re‑mix‚ ensure proper curing. If problems persist‚ try a zirconia primer.!!
Storage and shelf life of RelyX Unicem products
relyx unicem instructions: RelyX Unicem cements should be stored in a cool‚ dry place‚ protected from direct sunlight. The recommended storage 5–30 °C. Keep product sealed. Exposure to moisture or air can compromise resin’s polymerization‚ reducing bond strength. Shelf life of RelyX Unicem 2 Automix is 12 months. After this period‚ cement’s viscosity may increase‚ altering setting time. Always check expiration date before use. If product appears discolored‚ discard immediately. When opening vial‚ use clean spatula and avoid touching cement. Mix cement in 1:1 ratio of resin to hardener. Proper storage preserves mechanical properties and chemical stability. The cement should be mixed immediately after opening the vial‚ as the resin component can begin to polymerize. After seating the restoration‚ light cure for the recommended time to ensure complete polymerization of the cement. If excess cement remains‚ remove it promptly with a scaler or cotton pellet before the light cure to avoid postoperative sensitivity. Always wear gloves and use a rubber dam when working with HF acid to protect soft tissues. Store dry. Keep!
relyx unicem instructions: store at 5–30 °C‚ sealed‚ avoid moisture. Shelf life 12 months; discard if expired or discolored. Mix immediately after opening; cure per protocol. Keep dry‚ dark cabinet. Keep cool cabinet.!!
Regulatory and safety information
relyx unicem instructions: This cement is a Class II medical device approved by the FDA (21 CFR 820) and compliant with EU Directive 2001/83/EC. The manufacturer requires the use of nitrile gloves‚ eye protection‚ and a face mask during handling. Store the product in a dry‚ temperature‑controlled environment (5–30 °C) and keep the container tightly closed to prevent moisture ingress. Avoid direct contact with skin; if contact occurs‚ wash with soap and water. Do not ingest. The product is contraindicated for patients with known hypersensitivity to any component. Dispose of unused material in accordance with local hazardous waste regulations. The cement should be mixed in a closed system and used within 5 minutes of mixing. The product is not a disinfectant‚ nor a sealant‚ and should not be used on surfaces contaminated with blood or other bodily fluids unless properly cleaned. The manufacturer maintains a post‑market surveillance program to monitor adverse events. In case of an adverse reaction‚ contact the manufacturer’s customer service and report the event to the relevant regulatory authority. The product is not intended for use in pediatric dentistry‚ orthodontic bonding‚ implant abutments‚ endodontic posts‚ temporary crowns‚ or patients with compromised immune systems. Not for pediatric use orthodontic bonding.
Handling precautions and waste disposal
relyx unicem instructions: The cement must be handled in a well‑ventilated area. Wear nitrile gloves‚ eye protection‚ and a surgical mask to avoid inhalation of fine particles. Keep the container sealed and store it at 5–30 °C. Do not expose the material to moisture or direct sunlight. When mixing‚ use a closed system and avoid splashing. If accidental contact with skin or mucous membranes occurs‚ rinse immediately with copious water and wash with soap. Do not ingest. Dispose of unused or contaminated material in a sealed‚ labeled biohazard container. Follow local regulations for hazardous waste. Do not flush the cement down the drain. The product is not a disinfectant; it should not be used on contaminated surfaces unless properly cleaned. Report any adverse events to manufacturer regulatory authorities. The manufacturer’s safety data sheet (SDS) is available on the official website. Follow all instructions in the SDS for handling‚ storage‚ and disposal. The cement is not intended for use on patients with known hypersensitivity to any component. Do not use on implant abutments‚ temporary crowns‚ or orthodontic bonding. Ensure the patient is informed of potential allergic reactions. Use only the recommended amount; excess cement should be removed with a scaler or cotton pellet. After removal‚ clean the surface with alcohol and dry before seating the restoration. The cement should be used within 5 minutes of mixing. Proper handling reduces the risk of contamination and ensures optimal bond strength.