Localized periodontitis induced by rubber bands. Report of two cases.

Two cases of severe localized periodontal destruction caused by rubber bands migrating toward the apices subgingivally are reported. In both cases the patients received periodontal treatment followed by orthodontic treatment and the affected teeth were maintained for two years without extraction. The inappropriate use of rubber bands may cause severe periodontal destruction or even lead to tooth mortality. The use of retentive hooks on orthodontic bands and twisted wire ligatures, as well as close professional supervision, are highly recommended to avoid this hazardous situation.