Orthodontic positioner and method for improving retention of tooth alignment therewith

Abstract From the Canadian patent

After a patient's teeth have become substantially perfectly aligned by a custom or preformed positioner one or, more selected depressions are filled with a liner material in a soft moldable state and having the property of hardening over a short period of time at body temperature and adhering to the positioner surface. The positioner is then placed in a patient's mouth with the teeth in place within their respective depressions. The filling material in the selected depressions then forms to the outer contour of the teeth located therein and hardens thereby providing in those depressions inner surfaces precisely fitted to the contour of their respective teeth.