Functional problems in orthodontic patients out of retention

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Abstract
Functional problems in the stomatognathic system have become a painful experience for many patients today. If these patients have previously undergone orthodontic treatment in childhood this is often claimed to be a cause of the symptoms, although this statement is frequently made only on the basis of ‘clinical experience’. An investigation was undertaken on 60 patients who had had treatment for Angle's Class II, Division 1 malocclusion and were, on average, five years out of retention. Thirty of the patients had been treated without extraction and the other 30 after extraction of four premolars. The functional and dysfunctional conditions of the stomatognathic system were compared with an untreated control group of the same age. The material (mean age 21 years) was sub-divided according to the anamnestic (A i O-A i II) and clinical (D i O-D i III) dysfunction indices of Helkimo (1974). The cases treated without extractions showed significantly less anamnestic and clinical disturbances than both the extraction and the control group (Pi II) and severe (D i III) disturbances, but more with slight (D i I) disturbances compared to the control group.

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