INSTRenew Sharpening Assistant

INSTRenew Sharpening Assistant Evaluation

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Sharpening Machine

The INSTRenew Sharpening Assistant produces and maintains professional-quality sharpening for all scalers and curettes.

With the introduction of the INSTRenew Sharpening Assistant, the most precise instrument sharpening assistant is now faster and easier, producing professional results with each sharpening, according to Nordent.

Because all scalers and curettes share the same angle between the blade face and the lateral surface, INSTRenew achieves and maintains exact angles on every brand and design of every hygiene instrument with a simple, 3-step method. By holding the blade face horizontally, the blade positioner automatically locks every instrument into position. The tip clamp then enables easy grasping of the instrument on any straight portion of the shank and maintains the correct position while sharpening. Then, simply trace each cutting edge over the sharpening cone.

Machine Performance

Seven of the 10 dentists and hygienists who participated in the evaluation of the INSTRenew Sharpening Assistant rated machine performance as excellent and 3 rated it as very good. One evaluator said it “brought back edges concisely and quickly” and another said it “worked like a dream. I can’t achieve the same results with other [methods]. A third evaluator said, “My only suggestion is to allow the holder to raise more.”

Ease of Use

Ease of use of INSTRenew was rated as excellent by 1 evaluator, as very good by 5, as good by 2, and as fair by 2. One evaluator was “thrilled with the results after a few tries.” Another called it “a little too technique sensitive,” and a third evaluator called it “easier the more you use it.” Two evaluators reported difficulty rounding the toe area. Another evaluator said it was “hard to access without bumping off the stone.”

One evaluator rated level of control during sharpening as excellent, and 9 rated it as very good or good.

One evaluator said instruments “didn’t always line up properly or hold [their] angle when clamped.” Three evaluators reported initial problems with grip, movement, slipping, or wobbling; 2 said the INSTRenew works well “once mechanics are understood” and the third “did well once I learned to clamp the instrument in tightly enough to prevent movement.”

Time to Sharpen

When asked about the time needed to achieve a sharp blade, 4 evaluators rated INSTRenew as excellent, 5 rated it as very good to good, and 1 rated it as fair. Comments ranged from “quick and easy” to “time-consuming when used before each patient.” The evaluator who called it “very quick (1 pass on the cone)” for instruments needing only maintenance, said very dull instruments “sometimes took 3 passes—still a short time.”

Sharpening Results

Overall sharpening results with INSTRenew were rated as excellent by 7 evaluators and as very good to good by 3. Sharpening consistency was rated as excellent by 6 evaluators and as very good to good by 4. One evaluator said it’s “almost like having a new instrument every time.” Another evaluator said it “brings the sharpness to almost new,” and a third achieved “factory sharpness.” One evaluator said, “Sometimes, even free-handing produced a sharp edge.”

Nine evaluators rated the length of time INSTRenew-sharpened blades remained sharp, compared to those sharpened with other methods. Four rated it as excellent and 5 rated it as very good to good. One evaluator said blades stayed sharper “longer than with handsharpening,” and another said, “Two weeks and counting. We haven’t resharpened yet.” The evaluator who said blades “have probably lasted doubly long” added, “That’s worth it in my book.”

Overall Satisfaction

Overall satisfaction was rated as excellent by 3 evaluators, as very good or good by 6, and as fair by 1. One evaluator “was delighted when I checked the first sharpened instrument...factory sharpness...every hygienist’s dream.”

Evaluation Snapshot

INSTRenew Sharpening Assistant
Nordent Manufacturing Inc.
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