In a dental malpractice action, is it reasonable practice for a dentist to refrain from introducing previous complaints as exhibits?

The appellant relies in part on the decision in Feldman v. Royal College of Dental Surgeons of Ontario, [1992] O.J. No. 2531 (Div. Ct.). There, the court wrote the following: [I]t is better as a matter of practice, particularly in the case of a principal witness whose credibility is severely attacked, to refrain from introducing previous complaints as exhibits to be adopted during the testimony of the witness.”