Abstract
This study was carried out to evaluate the relationship between frontal dentoskeletal form and lateralized masticatory index or bite force magnitude and direction.
Eighteen subjects, belonging to the normal face group were studied, and the frontal dentoskeletal form was analyzed with posteroanterior cephalograms. The subjects were divided into left deviation and right deviation groups, and mechanisms of jaw functions were analyzed in terms of lateralized masticatory index and bite force angulation in the horizontal plane during vertical clenching. The magnitude of bite force was divided into 4 steps, and the results were as follows:
1. Lateralized masticatory index showed the chewing side to be the same as the deviation side of the frontal dentoskeletal form.
A significant correlation was found between two groups for angle analysis item ∠Um-Um′ of frontal dentoskeletal form and right deviation group for distance analysis item Me-ML.
2. Bite force angulation in the horizontal plane showed the same phenomenon with frontal dentoskeletal form and lateralized masticatory index.
In the correlation of frontal dentoskeletal form and lateralized masticatory index and direction of bite force, significant correlation was noted in two groups of frontal dentoskeletal form of UUm-Um′, UCG-Me and Me-ML at 25% MC with lateralized masticatory index ∠(Zyg-AG)-(Zyg′-AG′) at 25% MC and 50% MC, as well as the left diviation group of ∠(Zyg-AG)-(Zyg′-AG′) at 75% MC with lateralized masticatory index and the right deviation group of ∠CG-Me at 50% MC.
