The compensation of dental arch and teeth in patients with skeletal protrusion and deviation of mandible.

OBJECTIVE

To investigate the compensation of dental arch and teeth in patients with skeletal protrusion and deviation of mandible.

METHODS

Measurement of 11 dental models was performed, midline of palate was defined as central line, the distance of every contact point to the midline was measured in each side. The dental arch symmetry was observed. Occlusion plane was defined as conference plane, the buccal or lingual inclination of posterior teeth in upper and lower arch was measured.

RESULTS

Upper arch was asymmetry in these patients, the arch width of deviated side (the side that the chin was deviated to) was broader than the other side. The posterior teeth of upper and lower arch were more buccally and lingually inclined respectively.

CONCLUSIONS

Skeletal protrusion and deviation of mandible may result in compensation of dental arch and teeth, the de-compensation is important in pre-operative orthodontic treatment.