D-4, r. 6 - Code of Ethics of the Ordre des denturologistes du Québec

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26. Except on just and reasonable grounds, a denturologist shall not cease to treat a patient. The following in particular are considered just and reasonable grounds:
(1)  loss of the patient’s confidence or lack of cooperation by the patient;
(2)  conflict of interest or a situation in which his professional independence might be called into question;
(3)  incitement by the patient to perform illegal, improper or fraudulent acts; and
(4)  refusal by the patient to pay his fees.
O.C. 1011-85, s. 26.