THE INFLUENCE OF CANINE GUIDANCE AND CONDYLAR GUIDANCE ON MANDIBULAR LATERAL MOVEMENT

This study investigates the definite influence of the working-side can ine and balancing-side condylar guidances on mandibular lateral moveme nt. Lateral movements were measured on 40 young adults (22 males and 1 8 females), using the three-dimensional mandibular movement analysing system. The inclinations of the paths were calculated on the working-s ide canine, incisor, balancing-side first and second molars and balanc ing-side condylar points in the frontal plane. Multiple regression ana lysis enabled quantitative evaluation of the influence of the canine p ath and condylar path on the path of each tooth. The canine path showe d greater influence than the condylar path even on the balancing-side second molar path. There was no difference between male and female sub jects in the influential ratio of the canine guidance to the condylar guidance on any tooth path. It was concluded that the influence of the anterior and posterior guidance on the lateral movement varied accord ing to the type of tooth, but not to the gender of the subject. This f unctional characteristic was confirmed by the morphological finding th at the relative location of the molars in relation to canine and condy le does not differ between the sexes. The difference in the guiding sy stem between the protrusive and lateral movement is also described in this paper.