He did not complete a root canal which ultimately resulted in having to have expensive further treatment to inlcude oral surgery for an extraction of remaing tooth, a bone graft and an implant. W/out the implant, I would have lost 2 more teeth.
He also snapped a tooth (previous root canal) off at the gum line and permanently cemented on a temporary crown that was a different color and was placed in crooked. This has also ultimately resulted in the need of an implant, after failure of other previous expensive dental work.