Reevaluation of the Significance of the Immediate Side Shift

Abstract

Among eight subjects whose anterior guidances had been changed and their condylar paths were measured before and after, a case in which the subject's immediate mandibular lateral translation had disappeared was found. This suggests a possibility that condylar paths including i.m.t. can be controlled by adjusting its anterior guidance. To reflect i.m.t. to the occlusal surfaces, one has to make centric slides by grinding the fossae of the opposing teeth, for cusp tips which intercuspate to the fosae of the opposing teeth so as to move towards working side by the amount of i.m.t.. As the result, there cause a dilemma that one must make horizontal slides of the centric artificially which must not exist in the centric. According to this study, it becomes questionable to give cusp tips any centric slides corresponding to the i.m.t..