Relationship between anterior guidance and mesiodistal inclination of lower incisor in human subject with or without TMJ noise

The relationship between anterior guidance and the mesiodistal inclination of the lower incisors relative to the existence of temporomandibular joint (TMJ) noise was investigated. One hundred and thirty-four individuals, 21 t o 40 years of age (mean age 23.8; 104 men and 30 women), were examined. A h ighly significant correlation was observed between the mean lower-incisor i nclination and the difference in steepness between the right and left anter ior guidances in the subject group showing TMJ noise (P < 0.001), whereas n o significant correlation was observed in the group without TMJ noise.