Hydrogum 5 – Alginate Impression Material with Ultra-Long Stability (Zhermack)

Hydrogum 5 by Zhermack is a high-quality, dust-free alginate impression material belonging to the Extra Fast Set category. Its name is derived from its key technology: maintaining dimensional stability for up to 5 days ($120$ hours), which is an exceptional indicator for hydrocolloid materials.

Technology and Characteristics

• 5-Day Dimensional Stability: This is the main technological advantage of Hydrogum 5. Thanks to a special formula, the impression shows minimal size change when stored correctly (in a sealed bag) for up to $120$ hours.

  • Clinical Advantage: This makes it possible to take impressions on Friday and deliver them to the lab as late as Tuesday without risking the accuracy of the final work.

• High Detail Accuracy: Hydrogum 5 ensures the reproduction of surface details with an accuracy approaching that of silicone materials (according to some sources, up to $5-10 \text{ \textmu m}$), which allows for the production of accurate working models.

• Scannable (CAD/CAM Ready): This is a modern feature. The material can be scanned using various scanners (structured light, blue laser, CBCT) without the need for special anti-glare powders, simplifying the transition to digital workflows.

• Extra-Fast Setting: The material has a short time in the oral cavity (approximately $45$ seconds), which significantly increases patient comfort and minimizes the risk of deformation due to movement.

• Dust-Free Formula and Thixotropy: The material is safe to work with (no dust during mixing) and has good thixotropy, allowing it to be easily loaded into the tray, yet it does not flow off the tray during seating in the oral cavity.

Key Advantages

• Extraordinary Workflow Flexibility: The possibility of casting a gypsum model 5 days after taking the impression significantly optimizes the schedule of the clinic and the laboratory.

• High Elasticity and Tear Resistance: Ensures easy and safe removal of the impression from the oral cavity, especially in the presence of significant undercuts, minimizing the risk of damage.

• Patient Comfort: Fast setting and a pleasant tropical fruit aroma (mangosteen) make the procedure more acceptable for patients, including children.

• Compatibility with Digital Technologies: The ability to be scanned facilitates integration into modern CAD/CAM protocols.

Applications

Hydrogum 5 is an ideal choice for all cases where a high-precision alginate with an extended impression storage period is required:

• Removable and partial dentures (clasps dentures).

• Diagnostic models and treatment planning.

• Temporary bridges and crowns.

• Opposing arch impressions.