Safety of partial wisdom tooth extraction?

Mostly safe: As with any surgery, there are always risks. If i understand your questions, the proposed treatment would leave some of the tooth behind. This is not an unheard of treatment, especially if removing the entire tooth would put you at risk for nerve damage in the lower jaw. You may want a second opinion and perhaps a cone beam ct scan to check the nerve/tooth relationship.

Depends what's left: If only some wisdom teeth and not others were extracted often safe, if only part of the tooth is removed it's probably not so safe.

.????: Don't know if you mean not getting all of your wisdom teeth out or having a decayed piece removed. Either way, if your wisdom teeth are bothering you in any matter...Go have your dentist look at it or the, and give you all of your options..

Depends: It is customary to leave a part of the tooth if the root is intimately associated with the nerve. This is coronectomy. Otherwise, it is much better to completely remove wisdom tooth. For best results with wisdom teeth, make sure you are evaluated and treated by a board certified oral & maxillofacial surgeon.