The LM-RondoPlus sharpening machine does not require separate grinding solutions. LM-RondoPlus sharpens instruments in just a few seconds, while preserving their original form.

The ceramic sharpening stone is mounted in a casing, which can rotate 360°. The instrument being sharpened is placed on the instrument rest next to the sharpening stone. The lower rest position is for periodontal instruments while the upper position is for preparation instruments. The hand holding the instrument remains still – the instrument is sharpened by rotating the casing.

All hand instruments are sharpened with the same basic technique. LM-RondoPlus sharpens all hand instruments, whether they are periodontal or preparation instruments, or have convex or straight cutting edges.

LM-RondoPlus is equipped with LM-Fingo sharpness test sticks, which can be mounted on either side of the machine or worn on the finger. Sharpness is easy to test by drawing the instrument lightly along LM-Fingo. There are three ceramic sharpening stone grits available for the LM-RondoPlus sharpening machine. Sharpening stones can be easily and quickly changed.

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Product Details


  • Simple method - the blade is held in the correct sharpening position and the grinding stone rotates
  • Sharpening one instrument only takes a few seconds


  • For both periodontal and preparation instruments
  • For both right- or left-handed
  • The direction of rotation can be selected


  • A dual-position instrument rest. The upper position is for preparation instruments and the lower for periodontal instruments
  • The original blade form is preserved
  • Low rotational speed - the blade will not heat up nor will its temper be affected

The fine-grain ceramic stone is 400 grit. Finer and coarser sharpening stones are available as spare parts.


LM-RondoPlus: Testing sharpness

How to test the sharpness of an instrument.

LM-RondoPlus: General principles of sharpening

The general principles of sharpening with LM-RondoPlus.

LM-RondoPlus: Changing stones and maintenance

How to change the stones and maintain the LM-RondoPlus.