Research on clinical application of two different eruption blocking appliances

To observe the clinical efficacy in patients treated with two different eruption blocking appliances.

Totally 40 children (21 boys, 19 girls), aged 6.5-8.5 years old, having premature eruption of permanent tooth were randomly divided into 2 groups, with 20 cases in each group: group A (wearing traditional band and loop appliance of eruption blocking during the whole day) and group B (wearing modified band and loop appliance of eruption blocking during the whole day). The patients had regular check every 3 months until the root of premature premolar developed 1/2. The efficacy of the two appliances was evaluated on the following aspects: space maintenance, losing ratio of bands, tooth mobility and prevalence of dental caries of the premolars.

The efficacy on space maintaining and eruption impaction were not statistically different (P＞0.05), but prevalence of dental caries of the teeth in group A was higher than that of group B (P＜0.05).

The modified band and loop appliance of eruption blocking is effective and good for tooth health.