How to avoid harmful ledges and gouges in enamel

A technique using SupraDisc with Disc Guard

One of the greatest difficulties we face when reducing tooth structure with diamond discs is ensuring that the disc remains parallel to the teeth while in the interproximal space. Deviations from this angle can cause uneven cutting, often leaving harmful ledges or gouges in the enamel.

Unfortunately, the standard, one-handed technique that is most commonly taught is not ideal for helping minimize this risk. The disc is affected by any changes to the angulation of either the wrist or the elbow, and this position lacks any means of ensuring stability while the disc is in use. With traditional armamentarium, this was the only viable technique, as there was no safe place for the use of a second hand to stabilize the spinning disc.

Using the ContacEZ Snap-On DiscGuard, however, a safer, more accurate technique is available. Using the free hand to counter-balance the disc by pressing against the top of the Snap-On DiscGuard ensures clean, accurate reduction in the interproximal space and improves the safety of an otherwise stressful procedure.

 Fig. 1

Fig. 1

 Fig. 2

Fig. 2

Even small changes in angulation of the wrist or elbow can cause the disc to stray from parallel when using only one hand.

  Fig. 3

Fig. 3

The unique design of the Snap-On DiscGuard partially covers the top of the disc, allowing the user to safely use a second hand while disking.

  Fig. 4

Fig. 4

Using the second hand to counter-balance any slight changes in the angle of the primary hand’s wrist or elbow keeps the disc parallel during use.

  Fig. 5

Fig. 5

  Fig. 6

Fig. 6

The disc should be run as it goes into the space, and stopped as it is removed from the space, to prevent flare-out between the teeth (Fig 5).