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Hi Al: Nice prep, I dont like the erbium for crown troughing for a few reasons……..
1. It is slow compared to the diode or argon where you can create a trough around the tooth. The erbium actually causes the tissue to be planed away whereas the dedicated soft tissue lasers create a trough.
2. It bleeds and requires a hemostatic agent.
3. It can nick your margin and cause notches depending on the setting.
I will at times put in Expasyl to laterally expand the tissue.
Check out this diode case………
Glenn
Here is a second case shot with the scope using the Argon laser to retract followed by Expasyl.
There are other less expensive ways to expand the trough but there is no oozing, a better trough and no risk of damage to the margins with the diode , argon or Nd Yag.
I havent had much success with the Erbium troughing, its the way it cuts that makes it difficult in my hands at least.
Glenn
