The Accu-Dent System 1 is a new impression system for complete dentures from the Ivoclar Vivadent company. The system uses the Accu-Gel impression materials, which are chemically compatible, irreversible hydrocolloid materials that differ in viscosity. The low-density (syringe) material is injected into the vestibular areas while the high-density (tray) material is used in the tray to support the syringe material and form a type of "custom tray" in the mouth. The system comes with special, autoclavable, plastic, perforated impression trays that Ivoclar Vivadent claims can be easily modified for special cases. The Accu-dent impression materials are said to be accurate not only for preliminary impressions but also for final impressions for denture fabrication.
The Accu-Dent System 1 Kit comes with all items needed for making irreversible hydrocolloid impressions. Clinical evaluators reported that the material was easy to mix and dispense, with acceptable working and setting times. Patients tolerated the material well, in part because it did not flow out of the trays as much as traditional irreversible hydrocolloids. Clinical users found the impression trays very useful and appreciated their customized design which made it easier to make successful impressions. The system was found to be excellent for preliminary casts and suitable for the fabrication of complete immediate dentures. Instructions were complete and easy to read with adequate detail. The Accu-Dent System 1 packaging is compact and easy to store.
The Accu-gel impression materials did meet ANSI/ADA specification 18 requirements for alginate materials but failed to meet the higher detail reproduction and gypsum compatibility standards of ANSI/ADA No. 19 for typical elastomeric final impression materials. Prosthodontic evaluators attempted to use the Accu-Gel impression materials for final impressions but discontinued its use after experiencing clinical problems. The material required water cooler than room temperature for mixing, and evaluators found the tray material too viscous. This impression material was more expensive than other commonly-used irreversible hydrocolloid products.
This review has been adapted from the DECS website. The DECS has no formal association with Dentalcompare or with vendors listed on dentalcompare.com. The DECS does not specifically endorse any particular product or vendor and is provided for informational purposes only.
