Analysis of condylar movement in children

Abstract

     In order to clarify the three-dimensional condylar movement in children, measurements were made using the Axi-Path II Recorder on adults and on children in Hellman's dental stages III A and III B. Averages were obtained for these two groups and the results were compared.
     The manipulation technique was useful in obtaining the location of the finite hinge-axis position. Average values were obtained for condylar movement in children in Hellman's dental stages III A and III B. The excursive tracing of the inclination with the axis-orbital plane was smaller in children than adults. The t-test showed no significant difference between the two groups in the amount of condylar movement during protrusion and mediotrusion. However, on opening, the adults had significantly greater values than the children. When the side shift of the balancing side condyle was compared on the left and right, the children showed no significant difference in motility and mobility. In adults, however, the right condyle had significantly greater values than the left. On the right side there were no significant differences in side shift between adults and children. However, on the left side, although the mobility was essentially the same for the two groups, the motility was significantly smaller for the adults.
     These values may be useful in preventing imbalances between anterior and posterior guidance during dental treatment in children.