Prediction of orthodontic band sizes from selected teeth

Abstract

An attempt was made to predict orthodontic band sizes from the band sizes of certain key teeth. In order to accomplish this, a study was designed to relate individual teeth to each other from a tooth size measurement. Various studies which had looked at tooth size from a mesiodistal standpoint were discussed. Some of these studies had observed a correlation between one tooth and another within the same individual. We decided to examine tooth circumference as a prediction. Fifty-three patients about to undergo active orthodontic treatment were selected for this study. Band sizes, which are really circumferential measurements, were recorded on prepared forms by the orthodontists involved in the study. A statistical correlation was made between the band sizes of certain key teeth in the dental arch and the remainder of the teeth in an attempt to simplify the selection of the preformed bands for a given patient. These data were subjected to additional analysis to determine whether an appropriate tooth could be used as the independent variable in predicting the band sizes for the remaining teeth. It was concluded from this study that the band size for the second premolar was sometimes significantly related to the band size for the canine and lateral incisor and only generally related to the band size for the central incisors. There appears to be a strong relationship between right and left counterparts. Finally, band size correlations were higher in the maxillary arch than in the mandibular arch. Other analyses were made from our data. Band size figures were examined for sex differences in case of predictability, with no significant differences being found. When the data were compared for intra-arch relationships, a very high correlation was observed between left and right band sizes. An experienced orthodontist could probably do as well as these prediction models. Still, these models may be useful in training dental auxiliary personnel in band selection.