Influence of straight-pull headgear on the eruption pattern of maxillary canines: a retrospective study.

AIM: To evaluate the effect of the straight-pull headgear and activator (Andresen type) treatment on the eruption pattern of impacted maxillary canines.

METHODS

Mesiodistal positional, angular, and vertical changes of impacted canines were evaluated and statistically analyzed in pre- and posttreatment panoramic radiographs of 22 patients (12 treated with combination headgear, 10 treated with an activator).

RESULTS

Eruption of the permanent canines in the group treated with straight-pull headgear was significantly more successful (88%) than in the group treated with an activator (62%).

CONCLUSION

Mesiodistal and vertical crown position, as well as angulation of canines, differ significantly between subjects treated with straight-pull headgear or an activator.