- Tooth with evidence of current or recent caries, or reported treatment of decay within 12 months of screening and tooth with exposed dentine but with deep, defective or facial restorations, teeth used as abutments for fixed or removable partial dentures, dental implants, teeth with full crowns or veneers, orthodontic bands or cracked enamel. Sensitive teeth with contributing aetiologies other than erosion, abrasion or recession of exposed dentine. Sensitive tooth not expected to respond to treatment with an over-the-counter dentifrice in the opinion of the investigator.