Orthodontic Update 

Abstract: Relapse is one of the commonest risk factors in orthodontics. Post-treatment changes following orthodontics could be due to periodontal or occlusal factors, but they can also be due to soft tissue changes and growth. Soft tissue changes and growth are beyond an orthodontist's control, and this explains the unpredictable nature of orthodontic relapse. Patients need to be informed of the unpredictable nature of relapse before they begin treatment, and the possible need for long-term retention to help reduce the amount of relapse.

Abstract: Fixed retainers are a popular method of maintaining incisor position following orthodontic treatment. This paper reviews the complications reported with fixed retainers and reports a case in which suspected activation in a multistrand bonded retainer had caused severe unwanted movement of two teeth in the upper labial segment. Clinical Relevance: This paper stresses the importance of passive fixed retainers and the need for long-term review of patients wearing bonded retainers.