EXA’lence impression material combines the features of VPS and polyether for superior elasticity, tear-strength, hydrophilicity, and flow.
GC America describes EXA’lence as the new generation of vinyl polyether silicone (VPES) impression material, combining the best features of vinyl polysiloxane and polyether. According to the manufacturer, superior elasticity and distortion-free tear strength, along with intrinsic hydrophilicity and optimal flow, yields exceptionally accurate, detailed, and predictable impressions.
EXA’lence comes in light body, extra-light body, heavy body, heavy-body rigid, and medium/monophase body formulations.
Impression Detail and Precision
When the 9 dentists who participated in this evaluation were asked to rate the detail and precision of impressions made with EXA’lence, 5 rated this feature as excellent and 4 rated it as very good. One evaluator said the detail was “very accurate and restorations fit well,” and another who used it for inlays, onlays, and implants called it “very good.” One dentist said porcelain-fused-to-metal (PFM) and Captek crown margins were “smooth and barely detectable, even interproximally.”
According to the manufacturer, hydrophilicity in the new VPES material occurs during (not after) set time, capturing all of the fine detail in any environment. One evaluator said sulcular fluid “isn’t an issue.” Another evaluator said, “Wow. Even with blood and saliva in a difficult-to-control situation, I squirted the extra-light body into the preps, and voila—2 mm to 3 mm fins past the margins. I’ve never seen that with any other VPS.” Four evaluators rated hydrophilicity as excellent and 5 rated it as very good to good.
Ease of Use (Handling and Delivery)
Ease of use of EXA’lence was rated as excellent by 3 evaluators and as very good by 6. One evaluator called it “very simple and routine—nothing very different.”
Handling was rated as excellent by 3 evaluators, as very good by 5, and as good by 1. One evaluator “had to switch to the old [material] after 2 hardening problems.” Another evaluator said, “Extra-light body is my favorite— not runny at all and similar to others’ regular/light body.”
Four evaluators rated the delivery method as excellent, 4 rated it as very good, and 1 rated it as fair. One evaluator called it “excellent,” another called the mix “inconsistent,” and a third said the heavy and light bodies were “simple and easy to dispense.” One dentist said, “I never took a bad impression using this material, but a smaller tip for light body would be nice.”
Flow and Mix Characteristics
According to the manufacturer, EXA’lence’s flow characteristics allow the material to flow subgingivally and produce predictable fit with minimal or no adjustments. Three evaluators rated flow as excellent, 5 rated it as very good, and 1 rated it as good. One dentist said flow was “a little thick on the light body, but [produced] accurate impressions.” Another evaluator initially found the extra-light body “surprisingly less ‘flowable’ than expected.” This evaluator said, “I thought it wouldn’t flow enough into and past margins but, sure enough, it did.”
The evaluators also assessed EXA’lence’s thixotropic (ability to flow under pressure/load) properties; 3 rated them as excellent, 4 rated them as very good, 1 rated them as good, and 1 rated them as fair. One dentist said it was “harder to express out of the cartridge,” and another reported “no problems, as expected.”
Mix characteristics were rated as excellent by 4 evaluators, as very good by 3, and as good by 1. One evaluator reported “2 impressions that didn’t mix properly” and another suggested “magnums for automated mixers/dispensers.” An evaluator who called the heavy and light-body mixes “thoroughly homogeneous” and “excellent as expected” also said, “The fast set was slower than expected.”
Overall satisfaction with EXA’lence was rated as excellent by 4 evaluators, as very good by 3, as good by 1, and as fair by 1. The evaluator who said it “captured excellent detail, even beyond the margins,” added, “Impeccable stone models. It impressively displaced slight blood and saliva, resulting in very precise fit of Empress onlays and Capteks, and other [high noble] PFMs.”