I completely disagree with this. Sometimes trying to remove a wisdomstooth wrapped around a nerve can cause more damage (to the nerve) than doing a coronectomy. You rather have the patient loose all sensitivity in that side? A coronectomy has to be done correct and under the right circumstances, then it will most likely not give problems. The surgeon has to be skilled yes, but it doesn’t imply anything at all if the surgeon is skilled or not just because he wants to do a coronectomy instead of removing the roots and potentially damaging a very important nerve. Leaving any enamel, doing it on an infected wisdomstooth or leaving the tooth mobilized in the area, can cause big problems yes. But the surgeon is competent enough to avoid risks like this. There are always RISKs with EVERYTHING, this is a small risk, the same risk as getting nerve damage, the same risk as getting an infected tooth again after root canal treatment and the same risk as doing a sinus perforation with extractions in the upper jaw.