Spacing of permanent incisors and its influence on the available space for mandibular canines and premolars

摘要

The report analysed differences between deposal space in segments l2— M | measured from mesioaproximal surface C to mesioaproximal surface M 1, measured by Moyers’s method and by predictable width of teeth crowns C, P1 and P2 established by correlation method with known value sum of lower incisors withs significance of 75%, at 158 subejcts both sexes with mixed dentition. In regard to spacing of incisors subjects are distributed in three groups: norm al spacing of incisors, crowding of incisors and the spaces between incisors. Differences among predictable widths of crowns C, P1 and P2 nad desposal space in segments l2— M, evaluated by two methods show statisticly significant differences at groups with crowding of incisors and the spaces between the incisors. Moyers ’s method o f measuring desposal space for position C, P1 and P2 in dental arch is not convenient for the effect of evaluation of premature loss of deciduous teeth from resistance zone on the loss of the space in dental arch at mentioned spacing of incisors.